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WO2010089888A1 - Power source system - Google Patents

Power source system Download PDF

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Publication number
WO2010089888A1
WO2010089888A1 PCT/JP2009/052149 JP2009052149W WO2010089888A1 WO 2010089888 A1 WO2010089888 A1 WO 2010089888A1 JP 2009052149 W JP2009052149 W JP 2009052149W WO 2010089888 A1 WO2010089888 A1 WO 2010089888A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
converter
power
period
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/052149
Other languages
French (fr)
Japanese (ja)
Inventor
真琴 吉岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to PCT/JP2009/052149 priority Critical patent/WO2010089888A1/en
Publication of WO2010089888A1 publication Critical patent/WO2010089888A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1588—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to a vehicle power supply system, and more particularly to a vehicle power supply system including a plurality of converters.
  • Patent Document 1 discloses that a ripple current generated by a power generating rotating electrical machine and a traveling rotating electrical machine is reduced in a hybrid vehicle including a power generating rotating electrical machine and a traveling rotating electrical machine. Disclosed is a control device for a rotating electrical machine.
  • the control device disclosed in Japanese Patent Application Laid-Open No. 2002-84790 is connected to a DC power source, connected to a DC power source, a first inverter that supplies a control current to a first rotating electrical machine that is mainly used as an electric motor, A second inverter that supplies a control current to a second rotating electrical machine that is mainly used as a generator, a first carrier signal that defines the operating frequency of the first inverter, and a desired control current that is supplied to the first rotating electrical machine
  • a first inverter driving unit that compares the first voltage command value for generating a pulse width modulation signal for driving the switching element of the first inverter, and has the same cycle as the first carrier signal, and the second inverter
  • the second carrier signal defining the operating frequency of the second inverter and the second voltage command value for supplying a desired control current to the second rotating electrical machine are compared, and the switching element of the second inverter is And a second inverter driving unit for generating a pulse width modulated signal for moving
  • the period of the traveling side pulse generated on the DC bus and the power generation are made equal by making the period of the first carrier signal equal to the period of the second carrier signal.
  • the generation period of both pulses can be made substantially the same, the ripple current on the DC bus can be reduced, and the generation of electrical high frequency noise can be suppressed.
  • a converter is usually provided for boosting the voltage of the power storage device and supplying it to the rotating electrical machine.
  • This converter is provided with a reactor, and the reactor vibrates due to the influence of a ripple current generated during the boosting operation of the converter, and high-frequency noise is generated.
  • a plurality of power storage devices may be provided in order to extend the travelable distance with electric power.
  • a plurality of converters are required corresponding to the plurality of power storage devices, respectively. Therefore, a plurality of reactors for the booster circuit are required, and there is a concern that the above-described high-frequency noise is further deteriorated as compared with the case of one reactor.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power supply system that can reduce switching noise of a converter that can be heard by a vehicle user in a vehicle including a plurality of converters. Is to provide.
  • the power supply system is a power supply system that can exchange power with a load that consumes power.
  • This power supply system is provided between a first power supply and a second power supply, each of which is electrically connected in parallel to a load, and between the load and the first power supply, and performs a switching operation in accordance with a given first waveform signal.
  • the first waveform signal and the second waveform signal so that the second converter that performs voltage conversion between the load and the second power supply, and the switching operation of the first converter and the switching operation of the second converter are in opposite phases to each other.
  • a control device for controlling for controlling.
  • control device sets the period of the first waveform signal and the period of the second waveform signal to coincide with each other, and sets the phase of the first waveform signal and the phase of the second waveform signal by a half period.
  • the first converter has a first upper arm whose positive side is connected to the positive side of the load, a positive side is connected to the negative side of the first upper arm, the negative side is the negative side of the load, and the negative side of the first power source.
  • a first reactor provided between a first upper arm and an intermediate point between the first upper arm and the first lower arm and the anode side of the first power source.
  • the second converter has a positive side connected to the positive side of the load, a positive side connected to the negative side of the second upper arm, and a negative side connected to the negative side of the load and the negative side of the second power source.
  • the first waveform signal includes a first upper signal for controlling the first upper arm and a first lower signal for controlling the first lower arm.
  • the second waveform signal includes a second upper signal for controlling the second upper arm and a second lower signal for controlling the second lower arm.
  • the control device sets the first upper signal and the second upper signal in opposite phases, and sets the first lower signal and the second lower signal in opposite phases.
  • control device alternately sets an ON period and an OFF period that are equal in length to each of the first upper signal, the first lower signal, the second upper signal, and the second lower signal.
  • first upper signal is in the on period
  • second upper signal is set in the off period
  • first lower signal is set in the off period
  • second lower signal is set in the on period. Is the off period, the second upper signal is set to the on period, the first lower signal is set to the on period, and the second lower signal is set to the off period.
  • the power supply system is mounted on a vehicle.
  • the load is a rotating electrical machine that generates driving force for the vehicle.
  • FIG. 1 is an overall block diagram of a vehicle according to an embodiment of the present invention. It is a schematic block diagram of the 1st and 2nd converter shown in FIG. It is a figure which shows the drive signal waveform of a converter, and the vibration waveform of a reactor.
  • FIG. 1 is an overall block diagram of a vehicle according to an embodiment of the present invention.
  • vehicle 100 includes a power supply system 1, a driving force generation unit 2, and an ECU (Electronic Control Unit) 8000.
  • ECU Electronic Control Unit
  • the driving force generator 2 includes a first inverter 30-1, a second inverter 30-2, a first MG (Motor-Generator) 32-1, a second MG 32-2, a power split device 34, an engine 36, Drive wheel 38.
  • MG Motor-Generator
  • the first MG 32-1, the second MG 32-2, and the engine 36 are connected to the power split device 34.
  • the vehicle 100 travels by driving force from at least one of the engine 36 and the second MG 32-2. More specifically, vehicle 100 travels in any one of an electric travel mode (hereinafter also referred to as “EV travel mode”) and a hybrid travel mode (hereinafter also referred to as “HV travel mode”).
  • EV travel mode is a travel mode in which the vehicle 100 travels with the power of the second MG 32-2 without using the power of the engine 36.
  • the HV travel mode is a travel mode in which the vehicle 100 travels with the power of the engine 36 and the second MG 32-2.
  • the ECU 8000 performs either EV traveling control for traveling the vehicle 100 in the EV traveling mode or HV traveling control for traveling the vehicle 100 in the HV traveling mode.
  • the power generated by the engine 36 is divided into two paths by the power split device 34. That is, one is a path transmitted to the drive wheel 38 and the other is a path transmitted to the first MG 32-1.
  • Each of the first MG 32-1 and the second MG 32-2 is an AC rotating electric machine, for example, a three-phase AC rotating electric machine including a rotor in which a permanent magnet is embedded.
  • SOC State Of Charge
  • a predetermined range for example, about 40% to 60%.
  • the engine 36 is operated, and power is generated by the first MG 32-1 using the power of the engine 36 divided by the power split device 34.
  • the electric power generated by the first MG 32-1 is supplied to the power supply system 1.
  • the second MG 32-2 generates driving force using at least one of the power supplied from the power supply system 1 and the power generated by the first MG 32-1. Then, the driving force of the second MG 32-2 is transmitted to the driving wheel 38.
  • the second MG 32-2 is driven by the drive wheel 38, and the second MG 32-2 operates as a generator.
  • second MG 32-2 operates as a regenerative brake that converts braking energy into electric power. Then, the electric power generated by the second MG 32-2 is supplied to the power supply system 1.
  • the power split device 34 includes a planetary gear including a sun gear, a pinion gear, a carrier, and a ring gear.
  • the pinion gear engages with the sun gear and the ring gear.
  • the carrier supports the pinion gear so as to be capable of rotating, and is connected to the crankshaft of the engine 36.
  • the sun gear is connected to the rotation shaft of the first MG 32-1.
  • the ring gear is connected to the rotation shaft of the second MG 32-2.
  • the first inverter 30-1 and the second inverter 30-2 are connected to the main positive bus MPL and the main negative bus MNL. Then, first inverter 30-1 and second inverter 30-2 convert drive power (DC power) supplied from power supply system 1 into AC power and output the AC power to first MG 32-1 and second MG 32-2, respectively. . The first inverter 30-1 and the second inverter 30-2 convert the AC power generated by the first MG 32-1 and the second MG 32-2, respectively, into DC power and output it as regenerative power to the power supply system 1.
  • each of the first inverter 30-1 and the second inverter 30-2 includes, for example, a bridge circuit including switching elements for three phases.
  • Each inverter drives a corresponding MG by performing a switching operation in accordance with drive signals PWIV1 and PWIV2 from ECU 8000, respectively.
  • ECU 8000 calculates vehicle required power Ps based on detection signals of respective sensors (not shown), travel conditions, accelerator opening, and the like, and torques of first MG 32-1 and second MG 32-2 based on the calculated vehicle required power Ps. A target value and a rotational speed target value are calculated. ECU 8000 controls first inverter 30-1 and second inverter 30-2 so that the generated torque and rotational speed of first MG 32-1 and second MG 32-2 become target values.
  • the power supply system 1 includes a first power storage device 10-1, a second power storage device 10-2, a third power storage device 10-3, a first converter 12-1, a second converter 12-2, Switching device 18-1, second switching device 18-2, main positive bus MPL, main negative bus MNL, smoothing capacitor C, current sensors 14-1 to 14-3, voltage sensors 16-1 to 16-3, 20, charging device 11, and connector 13.
  • the charging device 11 converts electric power from an AC power supply 19 of an electric power company provided outside the vehicle into direct current, and the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3. Output to.
  • the ECU 8000 includes the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3.
  • the charging device 11 is controlled so that each of the SOCs becomes an upper limit value (for example, about 80%). That is, vehicle 100 is a plug-in vehicle.
  • the vehicle to which the power supply system according to the present invention is applicable is not limited to a plug-in vehicle.
  • Each of the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3 is a DC power source in which a plurality of battery cells such as nickel hydride and lithium ion are connected in series. Note that at least one of the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3 may be a rechargeable large-capacity capacitor, for example.
  • the first power storage device 10-1 is connected to the first switching device 18-1, and the second power storage device 10-2 and the third power storage device 10-3 are connected to the second switching device 18-2.
  • First switching device 18-1 is provided between first power storage device 10-1 and first converter 12-1, and in accordance with switching signal SW1 from ECU 8000, first power storage device 10-1 and first converter 12 are connected. Switches the electrical connection state with -1. More specifically, the first switching device 18-1 includes a system relay RY1. When the switching signal SW1 is deactivated, the system relay RY1 is turned on. When the switching signal SW1 is activated, the system relay RY1 is turned on. The switching signal SW1 is activated when an unillustrated ignition switch is turned on by the user. That is, system relay RY1 is kept on when vehicle 100 is traveling.
  • Second switching device 18-2 is provided between second power storage device 10-2 and third power storage device 10-3 and second converter 12-2, and in accordance with switching signal SW2 from ECU 8000, second power storage device The electrical connection state between the second converter 12-2 and the second power storage device 10-3 is switched. More specifically, the second switching device 18-2 includes system relays RY2 and RY3. System relay RY2 is arranged between second power storage device 10-2 and second converter 12-2. System relay RY3 is arranged between third power storage device 10-3 and second converter 12-2. ECU 8000 generates switching signal SW2 for controlling on / off of each of system relays RY2 and RY3, and outputs the switching signal SW2 to second switching device 18-2.
  • second switching device 18-2 electrically connects one of second power storage device 10-2 and third power storage device 10-3 to second converter 12-2.
  • the state in which the second converter 12-2 is electrically disconnected from both the second power storage device 10-2 and the third power storage device 10-3 is switched.
  • the first converter 12-1 and the second converter 12-2 are connected in parallel to the main positive bus MPL and the main negative bus MNL.
  • First converter 12-1 performs voltage conversion between first power storage device 10-1 and main positive bus MPL and main negative bus MNL based on drive signal PWC1 from ECU 8000.
  • FIG. 1 shows a case where three power storage devices (first power storage device 10-1, second power storage device 10-2, and third power storage device 10-3) are provided. Is not limited to this.
  • the second power storage device 10-2 and the third power storage device 10-3 may be shared to provide two power storage devices as a whole.
  • FIG. 1 shows a case where two converters (first converter 12-1 and second converter 12-2) are provided, but the number of converters is not limited to this. For example, two or more converters may be provided according to the number of power storage devices.
  • the configurations of the first converter 12-1 and the second converter 12-2 will be described in detail later.
  • Smoothing capacitor C is connected between main positive bus MPL and main negative bus MNL, and reduces power fluctuation components included in main positive bus MPL and main negative bus MNL.
  • Voltage sensor 20 detects voltage Vh between main positive bus MPL and main negative bus MNL, and outputs the detected value to ECU 8000.
  • the voltage Vh is a voltage input to the first inverter 30-1 and the second inverter 30-2.
  • this voltage Vh is also referred to as “system voltage Vh”.
  • Current sensors 14-1 to 14-3 include current Ib1 input / output to / from first power storage device 10-1, current Ib2 input / output to / from second power storage device 10-2, and third power storage device. Current Ib3 input / output to / from 10-3 is detected, and the detected value is output to ECU 8000.
  • FIG. 1 shows the case where each of the current sensors 14-1 to 14-3 detects the current of the positive line, but each of the current sensors 14-1 to 14-3 detects the current of the negative line. May be.
  • Voltage sensors 16-1 to 16-3 detect voltage Vb1 of first power storage device 10-1, voltage Vb2 of second power storage device 10-2, and voltage Vb3 of third power storage device 10-3, respectively. The detected value is output to ECU 8000.
  • the ECU 8000 determines the first converter 12-1 and the second converter 12 based on the detected values from the current sensors 14-1 to 14-3 and the voltage sensors 16-1 to 16-3, 20 and the vehicle required power Ps.
  • Drive signals PWC1 and PWC2 for driving -2 respectively
  • ECU 8000 uses the generated drive signals PWC1, PWC2, PWIV1, PWIV2, and PWENG as the first converter 12-1, the second converter 12-2, the first inverter 30-1, the second inverter 30-2, Output to the engine 36.
  • ECU 8000 is a first power storage device 10-1 connected to first converter 12-1 in a discharge mode in which power is supplied from power supply system 1 to driving force generation unit 2 (that is, vehicle required power Ps> 0). Between the discharge margin power amount of the second power storage device 10-2 and the third power storage device 10-3 connectable to the second converter 12-2 by the second switching device 18-2 Accordingly, a discharge distribution ratio indicating the distribution of power discharged from the first power storage device 10-1 and the power storage device electrically connected to the second converter 12-2 by the second switching device 18-2 is calculated. To do. ECU 8000 controls first converter 12-1 and second converter 12-2 in accordance with the calculated discharge distribution ratio.
  • ECU 8000 in the charging mode in which electric power is supplied from driving force generating unit 2 to power supply system 1 (that is, vehicle required power Ps ⁇ 0), the amount of remaining charging power of first power storage device 10-1 and the second switching Connected to the first power storage device 10-1 and the second converter 12-2 according to the ratio of the charge margin power amount of the power storage device electrically connected to the second converter 12-2 by the device 18-2 A charge distribution ratio indicating distribution of electric power charged to the power storage device is calculated. ECU 8000 controls first converter 12-1 and second converter 12-2 in accordance with the calculated charge distribution ratio.
  • the vehicle 100 is provided with an HV switch 17.
  • the HV switch 17 is a switch for the driver to input an HV request indicating that HV traveling is requested.
  • the HV switch 17 When the HV switch 17 is turned on by the driver, the HV switch 17 outputs an HV request signal Rhv to the ECU 8000.
  • ECU 8000 executes either travel control of EV travel control or HV travel control based on vehicle required power Ps, SOC of each power storage device, HV request signal Rhv from HV switch 17, and the like.
  • each MG During HV traveling control, power generation, regeneration, and motor output by each MG are controlled so that the SOC of each power storage device is included in a predetermined range. For example, as described above, when the power storage devices need to be charged, the ECU 8000 starts the stopped engine 36 or increases the output of the operating engine 36 to increase the amount of power generated by each MG. Increase the amount of charge for each power storage device.
  • FIG. 2 is a schematic configuration diagram of the first converter 12-1 and the second converter 12-2 shown in FIG. Since the configuration and operation of each converter are the same, the configuration and operation of first converter 12-1 will be mainly described below.
  • the first converter 12-1 includes a chopper circuit 42-1, a positive bus LN1A, a negative bus LN1C, a wiring LN1B, and a smoothing capacitor C1.
  • Chopper circuit 42-1 includes switching elements Q1A and Q1B, diodes D1A and D1B, and a reactor L1.
  • Positive bus LN1A has one end connected to the collector of switching element Q1B and the other end connected to main positive bus MPL.
  • Negative bus LN1C has one end connected to negative electrode line NL1 and the other end connected to main negative bus MNL.
  • Switching elements Q1A and Q1B are connected in series between negative bus LN1C and positive bus LN1A. Specifically, the emitter of switching element Q1A is connected to negative bus LN1C, and the collector of switching element Q1B is connected to positive bus LN1A. Diodes D1A and D1B are connected in antiparallel to switching elements Q1A and Q1B, respectively. Reactor L1 is connected between a connection node of switching elements Q1A and Q1B and wiring LN1B.
  • Wiring LN1B has one end connected to positive line PL1 and the other end connected to reactor L1.
  • Smoothing capacitor C1 is connected between line LN1B and negative bus LN1C, and reduces the AC component included in the DC voltage between line LN1B and negative bus LN1C.
  • the chopper circuit 42-1 performs bidirectional DC voltage conversion between the first power storage device 10-1 and the main positive bus MPL and the main negative bus MNL in response to the drive signal PWC1 from the ECU 8000.
  • the drive signal PWC1 includes a switching period T1A (the sum of an on period T1Aon and an off period T1Aoff) and a duty ratio (an on period T1Aon within the switching period T1A and an off period) of the switching element Q1A (hereinafter also referred to as “lower arm element Q1A”).
  • the drive signal PWC1A for controlling the ratio of the period T1Aoff), the switching period T1B of the switching element Q1B (hereinafter also referred to as “upper arm element Q1B”) (the sum of the on period T1Bon and the off period T1Boff), and the duty ratio (switching).
  • a drive signal PWC1B for controlling a ratio of an on period T1Bon and an off period T1Boff in the cycle T1B.
  • the ECU 8000 matches the switching cycle T1A of the lower arm element Q1A and the switching cycle T1B of the upper arm element Q1B, and the switching phase of the lower arm element Q1A and the upper arm element Q1B.
  • the off period T1Boff of the upper arm element Q1B is set in the on period T1Aon of the lower arm element Q1A
  • the on period T1Bon of the upper arm element Q1B is set in the off period T1Aoff of the lower arm element Q1A.
  • chopper circuit 42-2 connects one of second power storage device 10-2 and third power storage device 10-3 to main positive bus MPL and main negative bus MNL in response to drive signal PWC2 from ECU 8000. Bidirectional DC voltage conversion is performed between them.
  • the drive signal PWC2 includes a switching period T2A (the sum of an on period T2Aon and an off period T2Aoff) and a duty ratio (an on period T2Aon and an off period within the switching period T2A) of the switching element Q2A (hereinafter also referred to as “lower arm element Q2A”).
  • the drive signal PWC2A for controlling the ratio of the period T2Aoff), the switching period T2B of the switching element Q2B (hereinafter also referred to as “upper arm element Q2B”) (the sum of the on period T2Bon and the off period T2Boff), and the duty ratio (switching).
  • a drive signal PWC2B for controlling the ratio of the on period T2Bon and the off period T2Boff in the cycle T2B.
  • reactor L1 when first converter 12-1 is operated, reactor L1 has a direct current component due to repeated switching of lower arm element Q1A and upper arm element Q1B. A current (ripple current) in which an AC component is superimposed flows. Reactor L1 vibrates under the influence of the AC component of the ripple current, and high-frequency noise is generated from reactor L1.
  • Second power storage device 10-2 and third power storage device 10-3 are provided in addition to first converter 12-1 that performs voltage conversion between the first power storage device 10-1 and the driving force generator 2, any of the second power storage device 10-2 and the third power storage device 10-3 A second converter 12-2 that performs voltage conversion between one of them and the driving force generator 2 is provided. Therefore, when the first converter 12-1 and the second converter 12-2 are operated simultaneously, the reactor L2 vibrates similarly to the reactor L1, and high-frequency noise is also generated from the reactor L2. At this time, there is a concern that the vibration waveform of the reactor L1 and the vibration waveform of the reactor L2 overlap to generate a larger high-frequency noise.
  • FIG. 3 is a diagram showing output waveforms of the drive signals PWC1A and PWC1B and vibration waveforms of the reactors L1 and L2 when the above-described noise reduction control is executed.
  • the most characteristic point of the above-described noise reduction control is that when the first converter 12-1 and the second converter 12-2 are operated simultaneously, the switching cycle of the first converter 12-1 and the second converter 12-2. And the switching phase of the first converter 12-1 and the switching phase of the second converter 12-2 are reversed.
  • the switching cycle T1B of the drive signal PWC1B (that is, the switching cycle T1A of the drive signal PWC1A) and the switching cycle T2B of the drive signal PWC2B (that is, the switching cycle T2A of the drive signal PWC2A) are matched.
  • the output waveform of the drive signal PWC1B and the output waveform of the drive signal PWC2B are set in opposite phases.
  • the drive signal PWC2B is set to the off period T2Boff while the drive signal PWC1B is set to the on period T1Bon.
  • the drive signal PWC2B is set to the on period T2Bon.
  • the duty ratios (ratio between on period and off period) of the drive signals PWC1B, PWC1A, PWC2B, and PWC2A are set to 1: 1, respectively, and the output waveform of the drive signal PWC1B and the output of the drive signal PWC2B The waveform is set so as to be shifted from each other by a half cycle.
  • the upper arm element Q1B when the upper arm element Q1B is on (when the lower arm element Q1A is off), the upper arm element Q2B is turned off (lower arm element Q2A is on), and when the upper arm element Q1B is off (lower arm) When the element Q1A is on), the upper arm element Q2B is turned on (the lower arm element Q2A is turned off).
  • the vibration waveform of the reactor L1 and the vibration waveform of the reactor L2 are in opposite phases. Thereby, the high frequency noise generated on one side of reactors L1 and L2 can be canceled by the high frequency noise generated on the other side. Therefore, switching noise that can be heard by the user of vehicle 100 can be reduced.
  • the noise reduction control described above need not always be executed.
  • the noise reduction control may be executed only when the duty ratio can be set as shown in FIG.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

In a vehicle equipped with a first converter and a second converter, an ECU adjusts the switching period between the drive signal for the first converter and the drive signal for the second converter when the first converter and the second converter are simultaneously operated, and the phase of the drive signal for the first converter and the phase of the drive signal for the second converter are set reverse to each other.

Description

電源システムPower system

　本発明は、車両の電源システムに関し、特に、複数のコンバータを備えた車両の電源システムに関する。 The present invention relates to a vehicle power supply system, and more particularly to a vehicle power supply system including a plurality of converters.

　特開２００２－８４７９０号公報（特許文献１）には、発電用回転電機と走行用回転電機とを備えたハイブリッド車両において、発電用回転電機と走行用回転電機とより生じるリプル電流を低減することができる回転電機の制御装置を開示する。 Japanese Patent Laying-Open No. 2002-84790 (Patent Document 1) discloses that a ripple current generated by a power generating rotating electrical machine and a traveling rotating electrical machine is reduced in a hybrid vehicle including a power generating rotating electrical machine and a traveling rotating electrical machine. Disclosed is a control device for a rotating electrical machine.

　特開２００２－８４７９０号公報に開示された制御装置には、直流電源に接続され、主に電動機として使用される第１回転電機へ制御電流を供給する第１インバータと、直流電源に接続され、主に発電機として使用される第２回転電機へ制御電流を供給する第２インバータと、第１インバータの動作周波数を規定する第１キャリア信号と、第１回転電機へ所望の制御電流を供給するための第１電圧指令値とを比較して、第１インバータのスイッチング素子を駆動するパルス幅変調信号を生成する第１インバータ駆動部と、第１キャリア信号と同じ周期を有し、第２インバータの動作周波数を規定する第２キャリア信号と、第２回転電機へ所望の制御電流を供給するための第２電圧指令値とを比較して、第２インバータのスイッチング素子を駆動するパルス幅変調信号を生成する第２インバータ駆動部とを備える。第１インバータ駆動部と第２インバータ駆動部とは、第１インバータと第２インバータとが同期して動作し、第１インバータの電流と第２インバータの電流とが逆向きに生じるように制御する。 The control device disclosed in Japanese Patent Application Laid-Open No. 2002-84790 is connected to a DC power source, connected to a DC power source, a first inverter that supplies a control current to a first rotating electrical machine that is mainly used as an electric motor, A second inverter that supplies a control current to a second rotating electrical machine that is mainly used as a generator, a first carrier signal that defines the operating frequency of the first inverter, and a desired control current that is supplied to the first rotating electrical machine A first inverter driving unit that compares the first voltage command value for generating a pulse width modulation signal for driving the switching element of the first inverter, and has the same cycle as the first carrier signal, and the second inverter The second carrier signal defining the operating frequency of the second inverter and the second voltage command value for supplying a desired control current to the second rotating electrical machine are compared, and the switching element of the second inverter is And a second inverter driving unit for generating a pulse width modulated signal for moving. The first inverter drive unit and the second inverter drive unit are controlled so that the first inverter and the second inverter operate synchronously and the current of the first inverter and the current of the second inverter are generated in opposite directions. .

　特開２００２－８４７９０号公報に開示された制御装置によれば、第１キャリア信号の周期と第２キャリア信号の周期とを等しくすることにより、直流母線上に発生する走行側パルスの周期と発電側のパルスの周期とを等しくし、両パルスの発生時期をほぼ一致させることができ、直流母線上のリプル電流を低減して電気的高周波ノイズの発生を抑制することができる。
特開２００２－８４７９０号公報 According to the control device disclosed in Japanese Patent Application Laid-Open No. 2002-84790, the period of the traveling side pulse generated on the DC bus and the power generation are made equal by making the period of the first carrier signal equal to the period of the second carrier signal. The generation period of both pulses can be made substantially the same, the ripple current on the DC bus can be reduced, and the generation of electrical high frequency noise can be suppressed.
JP 2002-84790 A

　ところで、回転電機の出力を駆動力源とする車両においては、通常は、蓄電装置の電圧を昇圧して回転電機に供給するためのコンバータが備えられる。このコンバータには、リアクトルが備えられており、コンバータの昇圧動作の際に発生するリプル電流の影響によりリアクトルが振動し、高周波ノイズが発生する。 Incidentally, in a vehicle using the output of the rotating electrical machine as a driving force source, a converter is usually provided for boosting the voltage of the power storage device and supplying it to the rotating electrical machine. This converter is provided with a reactor, and the reactor vibrates due to the influence of a ripple current generated during the boosting operation of the converter, and high-frequency noise is generated.

　車両外部の電源から供給された電力での走行が可能ないわゆるプラグイン車両においては、電力での走行可能距離を伸ばすために複数の蓄電装置を備える場合がある。このような場合、複数の蓄電装置にそれぞれ対応させて複数のコンバータが必要となる。そのため、昇圧回路用のリアクトルも複数必要となり、リアクトルが１つの場合に比べて上述の高周波ノイズがさらに悪化することが懸念される。 In a so-called plug-in vehicle capable of traveling with electric power supplied from a power source outside the vehicle, a plurality of power storage devices may be provided in order to extend the travelable distance with electric power. In such a case, a plurality of converters are required corresponding to the plurality of power storage devices, respectively. Therefore, a plurality of reactors for the booster circuit are required, and there is a concern that the above-described high-frequency noise is further deteriorated as compared with the case of one reactor.

　しかしながら、上述の特開２００２－８４７９０号公報には、複数のコンバータを備えた電源システムに関する制御については開示されておらず、したがって複数のリアクトルの振動に起因する高周波ノイズを低減する技術についても何ら開示されていない。 However, the above-mentioned Japanese Patent Application Laid-Open No. 2002-84790 does not disclose control related to a power supply system including a plurality of converters, and therefore there is no technique for reducing high-frequency noise caused by vibrations of a plurality of reactors. Not disclosed.

　本発明は、上述の課題を解決するためになされたものであって、その目的は、複数のコンバータを備えた車両において、車両のユーザに聞こえるコンバータのスイッチングノイズを低減することができる電源システムを提供することである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power supply system that can reduce switching noise of a converter that can be heard by a vehicle user in a vehicle including a plurality of converters. Is to provide.

　この発明に係る電源システムは、電力を消費する負荷と電力を授受可能な電源システムである。この電源システムは、各々が負荷に並列に電気的に接続された第１電源および第２電源と、負荷と第１電源との間に設けられ、与えられる第１波形信号に応じてスイッチング動作を行なうことによって、負荷と第１電源との間で電圧変換を行なう第１コンバータと、負荷と第２電源との間に設けられ、与えられる第２波形信号に応じたスイッチング動作を行なうことによって、負荷と第２電源との間で電圧変換を行なう第２コンバータと、第１コンバータのスイッチング動作と第２コンバータのスイッチング動作とが互いに逆位相となるように、第１波形信号および第２波形信号を制御する制御装置とを含む。 The power supply system according to the present invention is a power supply system that can exchange power with a load that consumes power. This power supply system is provided between a first power supply and a second power supply, each of which is electrically connected in parallel to a load, and between the load and the first power supply, and performs a switching operation in accordance with a given first waveform signal. By performing the switching operation according to the second waveform signal provided between the load and the second power supply, and the first converter that performs voltage conversion between the load and the first power supply, The first waveform signal and the second waveform signal so that the second converter that performs voltage conversion between the load and the second power supply, and the switching operation of the first converter and the switching operation of the second converter are in opposite phases to each other. And a control device for controlling.

　好ましくは、制御装置は、第１波形信号の周期と第２波形信号の周期とを一致させ、かつ第１波形信号の位相と第２波形信号の位相とを半周期ずらして設定する。 Preferably, the control device sets the period of the first waveform signal and the period of the second waveform signal to coincide with each other, and sets the phase of the first waveform signal and the phase of the second waveform signal by a half period.

　さらに好ましくは、第１コンバータは、正極側が負荷の正極側に接続された第１上側アームと、正極側が第１上側アームの負極側に接続され、負極側が負荷の負極側および第１電源の負極側に接続された第１下側アームと、第１上側アームおよび第１下側アームの中間点と第１電源の陽極側との間に設けられた第１リアクトルとを含む。第２コンバータは、正極側が負荷の正極側に接続された第２上側アームと、正極側が第２上側アームの負極側に接続され、負極側が負荷の負極側および第２電源の負極側に接続された第２下側アームと、第２上側アームおよび第２下側アームの中間点と第２電源の陽極側との間に設けられた第２リアクトルとを含む。第１波形信号には、第１上側アームを制御するための第１上側信号と、第１下側アームを制御するための第１下側信号とが含まれる。第２波形信号には、第２上側アームを制御するための第２上側信号と、第２下側アームを制御するための第２下側信号とが含まれる。制御装置は、第１上側信号と第２上側信号とを互いに逆位相に設定するとともに、第１下側信号と第２下側信号とを互いに逆位相に設定する。 More preferably, the first converter has a first upper arm whose positive side is connected to the positive side of the load, a positive side is connected to the negative side of the first upper arm, the negative side is the negative side of the load, and the negative side of the first power source. And a first reactor provided between a first upper arm and an intermediate point between the first upper arm and the first lower arm and the anode side of the first power source. The second converter has a positive side connected to the positive side of the load, a positive side connected to the negative side of the second upper arm, and a negative side connected to the negative side of the load and the negative side of the second power source. A second lower arm, and a second reactor provided between an intermediate point of the second upper arm and the second lower arm and the anode side of the second power source. The first waveform signal includes a first upper signal for controlling the first upper arm and a first lower signal for controlling the first lower arm. The second waveform signal includes a second upper signal for controlling the second upper arm and a second lower signal for controlling the second lower arm. The control device sets the first upper signal and the second upper signal in opposite phases, and sets the first lower signal and the second lower signal in opposite phases.

　さらに好ましくは、制御装置は、第１上側信号、第１下側信号、第２上側信号、および第２下側信号の各々に対して互いに長さが等しいオン期間とオフ期間とを交互に設定し、第１上側信号がオン期間であるときは、第２上側信号をオフ期間に設定するとともに第１下側信号をオフ期間、第２下側信号をオン期間に設定し、第１上側信号がオフ期間であるときは、第２上側信号をオン期間に設定するとともに第１下側信号をオン期間、第２下側信号をオフ期間に設定する。 More preferably, the control device alternately sets an ON period and an OFF period that are equal in length to each of the first upper signal, the first lower signal, the second upper signal, and the second lower signal. When the first upper signal is in the on period, the second upper signal is set in the off period, the first lower signal is set in the off period, and the second lower signal is set in the on period. Is the off period, the second upper signal is set to the on period, the first lower signal is set to the on period, and the second lower signal is set to the off period.

　さらに好ましくは、電源システムは、車両に搭載される。負荷は、車両の駆動力を発生する回転電機である。 More preferably, the power supply system is mounted on a vehicle. The load is a rotating electrical machine that generates driving force for the vehicle.

　本発明によれば、複数のコンバータを備えた車両において、車両のユーザに聞こえるコンバータのスイッチングノイズを低減することができる According to the present invention, in a vehicle having a plurality of converters, it is possible to reduce converter switching noise heard by the vehicle user.

本発明の実施の形態に係る車両の全体ブロック図である。1 is an overall block diagram of a vehicle according to an embodiment of the present invention. 図１に示す第１および第２コンバータの概略構成図である。It is a schematic block diagram of the 1st and 2nd converter shown in FIG. コンバータの駆動信号波形およびリアクトルの振動波形を示す図である。It is a figure which shows the drive signal waveform of a converter, and the vibration waveform of a reactor.

符号の説明Explanation of symbols

　１　電源システム、２　駆動力発生部、１０－１～１０－３　蓄電装置、１１　充電装置、１２－１，１２－２　コンバータ、１３　コネクタ、１４－１～１４－３　電流センサ、１５　パドル、１６－１～１６－３，２０　電圧センサ、１７　ＨＶスイッチ、１８－１，１８－２　切替装置、１９　交流電源、３０－１，３０－２　インバータ、３２－１，３２－２　ＭＧ、３４　動力分割装置、３６　エンジン、３８　駆動輪、１００　車両、８０００　ＥＣＵ、Ｃ　平滑コンデンサ、Ｌ１，Ｌ２　リアクトル、ＬＮ１Ａ　正母線、ＬＮ１Ｂ　配線、ＬＮ１Ｃ　負母線、ＭＮＬ　主負母線、ＭＰＬ　主正母線、ＮＬ１　負極線、ＰＬ１　正極線、Ｑ１Ａ，Ｑ２Ａ　下アーム素子、Ｑ１Ｂ、Ｑ２Ｂ　上アーム素子、ＲＹ１～ＲＹ３　システムリレー。 1 power system, 2 driving force generator, 10-1 to 10-3 power storage device, 11 charging device, 12-1, 12-2 converter, 13 connector, 14-1 to 14-3 current sensor, 15 paddle, 16 -1 to 16-3, 20 Voltage sensor, 17 HV switch, 18-1, 18-2 switching device, 19 AC power supply, 30-1, 30-2 inverter, 32-1, 32-2 MG, 34 Power split Device, 36 engine, 38 drive wheels, 100 vehicle, 8000 ECU, C smoothing capacitor, L1, L2 reactor, LN1A positive bus, LN1B wiring, LN1C negative bus, MNL main negative bus, MPL main positive bus, NL1 negative electrode, PL1 Positive line, Q1A, Q2A lower arm element, Q1B, Q2B upper arm element, RY1-RY3 cis Relay.

　以下、本発明の実施の形態について、図面を参照しながら詳細に説明する。なお、図中同一または相当部分には同一符号を付してその説明は繰返さない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

　図１は、この発明の実施の形態に係る車両の全体ブロック図である。図１を参照して、車両１００は、電源システム１と、駆動力発生部２と、ＥＣＵ（Ｅｌｅｃｔｒｏｎｉｃ　Ｃｏｎｔｒｏｌ　Ｕｎｉｔ）８０００とを含む。 FIG. 1 is an overall block diagram of a vehicle according to an embodiment of the present invention. Referring to FIG. 1, vehicle 100 includes a power supply system 1, a driving force generation unit 2, and an ECU (Electronic Control Unit) 8000.

　駆動力発生部２は、第１インバータ３０－１と、第２インバータ３０－２と、第１ＭＧ（Ｍｏｔｏｒ－Ｇｅｎｅｒａｔｏｒ）３２－１と、第２ＭＧ３２－２と、動力分割装置３４と、エンジン３６と、駆動輪３８とを含む。 The driving force generator 2 includes a first inverter 30-1, a second inverter 30-2, a first MG (Motor-Generator) 32-1, a second MG 32-2, a power split device 34, an engine 36, Drive wheel 38.

　第１ＭＧ３２－１、第２ＭＧ３２－２およびエンジン３６は、動力分割装置３４に連結される。そして、この車両１００は、エンジン３６および第２ＭＧ３２－２の少なくとも一方からの駆動力によって走行する。より具体的には、車両１００は、電気走行モード（以下「ＥＶ走行モード」ともいう）およびハイブリッド走行モード（以下「ＨＶ走行モード」ともいう）のいずれかの走行モードで走行する。ＥＶ走行モードは、エンジン３６の動力を用いずに第２ＭＧ３２－２の動力によって車両１００を走行させる走行モードである。ＨＶ走行モードは、エンジン３６と第２ＭＧ３２－２との動力によって車両１００を走行させる走行モードである。ＥＣＵ８０００は、車両１００の走行時に、ＥＶ走行モードで車両１００を走行させるＥＶ走行制御と、ＨＶ走行モードで車両１００を走行させるＨＶ走行制御とのいずれかの制御を行なう。 The first MG 32-1, the second MG 32-2, and the engine 36 are connected to the power split device 34. The vehicle 100 travels by driving force from at least one of the engine 36 and the second MG 32-2. More specifically, vehicle 100 travels in any one of an electric travel mode (hereinafter also referred to as “EV travel mode”) and a hybrid travel mode (hereinafter also referred to as “HV travel mode”). The EV travel mode is a travel mode in which the vehicle 100 travels with the power of the second MG 32-2 without using the power of the engine 36. The HV travel mode is a travel mode in which the vehicle 100 travels with the power of the engine 36 and the second MG 32-2. When the vehicle 100 is traveling, the ECU 8000 performs either EV traveling control for traveling the vehicle 100 in the EV traveling mode or HV traveling control for traveling the vehicle 100 in the HV traveling mode.

　エンジン３６が発生する動力は、動力分割装置３４によって２経路に分割される。すなわち、一方は駆動輪３８へ伝達される経路であり、もう一方は第１ＭＧ３２－１へ伝達される経路である。 The power generated by the engine 36 is divided into two paths by the power split device 34. That is, one is a path transmitted to the drive wheel 38 and the other is a path transmitted to the first MG 32-1.

　第１ＭＧ３２－１および第２ＭＧ３２－２の各々は、交流回転電機であり、たとえば、永久磁石が埋設されたロータを備える三相交流回転電機から成る。ＨＶ走行制御中においては、電源システム１に含まれる蓄電装置（後述）の充電状態を示す値であるＳＯＣ（Ｓｔａｔｅ　Ｏｆ　Ｃｈａｒｇｅ）を所定範囲（たとえば４０％程度～６０％程度）に維持するようにエンジン３６が運転されて、動力分割装置３４によって分割されたエンジン３６の動力を用いて第１ＭＧ３２－１による発電が行なわれる。第１ＭＧ３２－１によって発電された電力は電源システム１へ供給される。 Each of the first MG 32-1 and the second MG 32-2 is an AC rotating electric machine, for example, a three-phase AC rotating electric machine including a rotor in which a permanent magnet is embedded. During HV traveling control, SOC (State Of Charge), which is a value indicating the state of charge of a power storage device (described later) included in power supply system 1, is maintained within a predetermined range (for example, about 40% to 60%). The engine 36 is operated, and power is generated by the first MG 32-1 using the power of the engine 36 divided by the power split device 34. The electric power generated by the first MG 32-1 is supplied to the power supply system 1.

　第２ＭＧ３２－２は、電源システム１から供給される電力および第１ＭＧ３２－１により発電された電力の少なくとも一方を用いて駆動力を発生する。そして、第２ＭＧ３２－２の駆動力は、駆動輪３８に伝達される。なお、車両の制動時等には、駆動輪３８により第２ＭＧ３２－２が駆動され、第２ＭＧ３２－２が発電機として作動する。これにより、第２ＭＧ３２－２は、制動エネルギを電力に変換する回生ブレーキとして作動する。そして、第２ＭＧ３２－２により発電された電力は、電源システム１へ供給される。 The second MG 32-2 generates driving force using at least one of the power supplied from the power supply system 1 and the power generated by the first MG 32-1. Then, the driving force of the second MG 32-2 is transmitted to the driving wheel 38. When the vehicle is braked, the second MG 32-2 is driven by the drive wheel 38, and the second MG 32-2 operates as a generator. Thus, second MG 32-2 operates as a regenerative brake that converts braking energy into electric power. Then, the electric power generated by the second MG 32-2 is supplied to the power supply system 1.

　動力分割装置３４は、サンギヤと、ピニオンギヤと、キャリアと、リングギヤとを含む遊星歯車から成る。ピニオンギヤは、サンギヤおよびリングギヤと係合する。キャリアは、ピニオンギヤを自転可能に支持するとともに、エンジン３６のクランクシャフトに連結される。サンギヤは、第１ＭＧ３２－１の回転軸に連結される。リングギヤは第２ＭＧ３２－２の回転軸に連結される。 The power split device 34 includes a planetary gear including a sun gear, a pinion gear, a carrier, and a ring gear. The pinion gear engages with the sun gear and the ring gear. The carrier supports the pinion gear so as to be capable of rotating, and is connected to the crankshaft of the engine 36. The sun gear is connected to the rotation shaft of the first MG 32-1. The ring gear is connected to the rotation shaft of the second MG 32-2.

　第１インバータ３０－１および第２インバータ３０－２は、主正母線ＭＰＬおよび主負母線ＭＮＬに接続される。そして、第１インバータ３０－１および第２インバータ３０－２は、電源システム１から供給される駆動電力（直流電力）を交流電力に変換してそれぞれ第１ＭＧ３２－１および第２ＭＧ３２－２へ出力する。また、第１インバータ３０－１および第２インバータ３０－２は、それぞれ第１ＭＧ３２－１および第２ＭＧ３２－２が発電する交流電力を直流電力に変換して回生電力として電源システム１へ出力する。 The first inverter 30-1 and the second inverter 30-2 are connected to the main positive bus MPL and the main negative bus MNL. Then, first inverter 30-1 and second inverter 30-2 convert drive power (DC power) supplied from power supply system 1 into AC power and output the AC power to first MG 32-1 and second MG 32-2, respectively. . The first inverter 30-1 and the second inverter 30-2 convert the AC power generated by the first MG 32-1 and the second MG 32-2, respectively, into DC power and output it as regenerative power to the power supply system 1.

　なお、第１インバータ３０－１および第２インバータ３０－２の各々は、たとえば、三相分のスイッチング素子を含むブリッジ回路から成る。そして、各インバータは、それぞれＥＣＵ８０００からの駆動信号ＰＷＩＶ１，ＰＷＩＶ２に応じてスイッチング動作を行なうことにより、対応のＭＧを駆動する。 Note that each of the first inverter 30-1 and the second inverter 30-2 includes, for example, a bridge circuit including switching elements for three phases. Each inverter drives a corresponding MG by performing a switching operation in accordance with drive signals PWIV1 and PWIV2 from ECU 8000, respectively.

　ＥＣＵ８０００は、図示されない各センサの検出信号、走行状況およびアクセル開度などに基づいて車両要求パワーＰｓを算出し、その算出した車両要求パワーＰｓに基づいて第１ＭＧ３２－１および第２ＭＧ３２－２のトルク目標値および回転速度目標値を算出する。そして、ＥＣＵ８０００は、第１ＭＧ３２－１および第２ＭＧ３２－２の発生トルクおよび回転速度が目標値となるように第１インバータ３０－１および第２インバータ３０－２を制御する。 ECU 8000 calculates vehicle required power Ps based on detection signals of respective sensors (not shown), travel conditions, accelerator opening, and the like, and torques of first MG 32-1 and second MG 32-2 based on the calculated vehicle required power Ps. A target value and a rotational speed target value are calculated. ECU 8000 controls first inverter 30-1 and second inverter 30-2 so that the generated torque and rotational speed of first MG 32-1 and second MG 32-2 become target values.

　電源システム１は、第１蓄電装置１０－１と、第２蓄電装置１０－２と、第３蓄電装置１０－３と、第１コンバータ１２－１と、第２コンバータ１２－２と、第１切替装置１８－１と、第２切替装置１８－２と、主正母線ＭＰＬと、主負母線ＭＮＬと、平滑コンデンサＣと、電流センサ１４－１～１４－３と、電圧センサ１６－１～１６－３，２０と、充電装置１１と、コネクタ１３とを含む。 The power supply system 1 includes a first power storage device 10-1, a second power storage device 10-2, a third power storage device 10-3, a first converter 12-1, a second converter 12-2, Switching device 18-1, second switching device 18-2, main positive bus MPL, main negative bus MNL, smoothing capacitor C, current sensors 14-1 to 14-3, voltage sensors 16-1 to 16-3, 20, charging device 11, and connector 13.

　充電装置１１は、車両外部に設けられた電力会社の交流電源１９からの電力を直流に変換して、第１蓄電装置１０－１、第２蓄電装置１０－２、第３蓄電装置１０－３へ出力する。ＥＣＵ８０００は、電力会社の交流電源１９に接続されたパドル１５が車両側のコネクタ１３に接続された場合、第１蓄電装置１０－１、第２蓄電装置１０－２、第３蓄電装置１０－３の各々のＳＯＣが上限値（たとえば８０％程度）になるように、充電装置１１を制御する。すなわち、車両１００は、プラグイン車両である。なお、本発明に係る電源システムが適用可能な車両は、プラグイン車両であることに限定されない。 The charging device 11 converts electric power from an AC power supply 19 of an electric power company provided outside the vehicle into direct current, and the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3. Output to. When the paddle 15 connected to the AC power source 19 of the electric power company is connected to the vehicle-side connector 13, the ECU 8000 includes the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3. The charging device 11 is controlled so that each of the SOCs becomes an upper limit value (for example, about 80%). That is, vehicle 100 is a plug-in vehicle. The vehicle to which the power supply system according to the present invention is applicable is not limited to a plug-in vehicle.

　第１蓄電装置１０－１、第２蓄電装置１０－２および第３蓄電装置１０－３の各々は、たとえばニッケル水素やリチウムイオン等の電池セルを複数直列に接続した直流電源である。なお、第１蓄電装置１０－１、第２蓄電装置１０－２および第３蓄電装置１０－３の少なくともいずれかが、たとえば再充電可能な大容量のキャパシタ等であってもよい。 Each of the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3 is a DC power source in which a plurality of battery cells such as nickel hydride and lithium ion are connected in series. Note that at least one of the first power storage device 10-1, the second power storage device 10-2, and the third power storage device 10-3 may be a rechargeable large-capacity capacitor, for example.

　第１蓄電装置１０－１は第１切替装置１８－１に接続され、第２蓄電装置１０－２および第３蓄電装置１０－３は第２切替装置１８－２に接続される。 The first power storage device 10-1 is connected to the first switching device 18-1, and the second power storage device 10-2 and the third power storage device 10-3 are connected to the second switching device 18-2.

　第１切替装置１８－１は、第１蓄電装置１０－１と第１コンバータ１２－１との間に設けられ、ＥＣＵ８０００からの切替信号ＳＷ１に従って、第１蓄電装置１０－１と第１コンバータ１２－１との電気的な接続状態を切り替える。より具体的には、第１切替装置１８－１は、システムリレーＲＹ１を含む。切替信号ＳＷ１が非活性化されているとき、システムリレーＲＹ１はオンされ、切替信号ＳＷ１が活性化されているとき、システムリレーＲＹ１はオンされる。切替信号ＳＷ１は、図示しないイグニッションスイッチがユーザによってオンされた時に活性化される。すなわち、車両１００の走行時においては、システムリレーＲＹ１はオンに維持される。 First switching device 18-1 is provided between first power storage device 10-1 and first converter 12-1, and in accordance with switching signal SW1 from ECU 8000, first power storage device 10-1 and first converter 12 are connected. Switches the electrical connection state with -1. More specifically, the first switching device 18-1 includes a system relay RY1. When the switching signal SW1 is deactivated, the system relay RY1 is turned on. When the switching signal SW1 is activated, the system relay RY1 is turned on. The switching signal SW1 is activated when an unillustrated ignition switch is turned on by the user. That is, system relay RY1 is kept on when vehicle 100 is traveling.

　第２切替装置１８－２は、第２蓄電装置１０－２および第３蓄電装置１０－３と第２コンバータ１２－２との間に設けられ、ＥＣＵ８０００からの切替信号ＳＷ２に従って、第２蓄電装置１０－２および第３蓄電装置１０－３と第２コンバータ１２－２との電気的な接続状態を切り替える。より具体的には、第２切替装置１８－２は、システムリレーＲＹ２，ＲＹ３を含む。システムリレーＲＹ２は、第２蓄電装置１０－２と第２コンバータ１２－２との間に配設される。システムリレーＲＹ３は、第３蓄電装置１０－３と第２コンバータ１２－２との間に配設される。そして、ＥＣＵ８０００は、システムリレーＲＹ２，ＲＹ３のそれぞれのオン，オフを制御するための切替信号ＳＷ２を生成して第２切替装置１８－２へ出力する。なお、本実施の形態においては、第２切替装置１８－２は、第２蓄電装置１０－２および第３蓄電装置１０－３のいずれか一方と第２コンバータ１２－２とを電気的に接続する状態、第２蓄電装置１０－２および第３蓄電装置１０－３の双方と第２コンバータ１２－２とを電気的に遮断する状態のいずれかに切り換えられる。 Second switching device 18-2 is provided between second power storage device 10-2 and third power storage device 10-3 and second converter 12-2, and in accordance with switching signal SW2 from ECU 8000, second power storage device The electrical connection state between the second converter 12-2 and the second power storage device 10-3 is switched. More specifically, the second switching device 18-2 includes system relays RY2 and RY3. System relay RY2 is arranged between second power storage device 10-2 and second converter 12-2. System relay RY3 is arranged between third power storage device 10-3 and second converter 12-2. ECU 8000 generates switching signal SW2 for controlling on / off of each of system relays RY2 and RY3, and outputs the switching signal SW2 to second switching device 18-2. In the present embodiment, second switching device 18-2 electrically connects one of second power storage device 10-2 and third power storage device 10-3 to second converter 12-2. The state in which the second converter 12-2 is electrically disconnected from both the second power storage device 10-2 and the third power storage device 10-3 is switched.

　第１コンバータ１２－１および第２コンバータ１２－２は、互いに並列して主正母線ＭＰＬおよび主負母線ＭＮＬに接続される。第１コンバータ１２－１は、ＥＣＵ８０００からの駆動信号ＰＷＣ１に基づいて、第１蓄電装置１０－１と主正母線ＭＰＬおよび主負母線ＭＮＬとの間で電圧変換を行なう。第２コンバータ１２－２は、ＥＣＵ８０００からの駆動信号ＰＷＣ２に基づいて、第２切替装置１８－２によって第２コンバータ１２－２に電気的に接続される第２蓄電装置１０－２および第３蓄電装置１０－３のいずれかと主正母線ＭＰＬおよび主負母線ＭＮＬとの間で電圧変換を行なう。 The first converter 12-1 and the second converter 12-2 are connected in parallel to the main positive bus MPL and the main negative bus MNL. First converter 12-1 performs voltage conversion between first power storage device 10-1 and main positive bus MPL and main negative bus MNL based on drive signal PWC1 from ECU 8000. Second converter 12-2, based on drive signal PWC2 from ECU 8000, second power storage device 10-2 and third power storage that are electrically connected to second converter 12-2 by second switching device 18-2. Voltage conversion is performed between any of the devices 10-3 and the main positive bus MPL and the main negative bus MNL.

　なお、この図１では、３つの蓄電装置（第１蓄電装置１０－１、第２蓄電装置１０－２、第３蓄電装置１０－３）を備える場合が示されているが、蓄電装置の数量はこれに限定されない。たとえば、第２蓄電装置１０－２および第３蓄電装置１０－３を共通化して、全体として２つの蓄電装置を備えるようにしてもよい。また、この図１では、２つのコンバータ（第１コンバータ１２－１および第２コンバータ１２－２）を備える場合が示されているが、コンバータの数量はこれに限定されない。たとえば、蓄電装置の数量に応じて２つ以上のコンバータを備えるようにしてもよい。第１コンバータ１２－１および第２コンバータ１２－２の構成については後に詳述する。 Note that FIG. 1 shows a case where three power storage devices (first power storage device 10-1, second power storage device 10-2, and third power storage device 10-3) are provided. Is not limited to this. For example, the second power storage device 10-2 and the third power storage device 10-3 may be shared to provide two power storage devices as a whole. Further, FIG. 1 shows a case where two converters (first converter 12-1 and second converter 12-2) are provided, but the number of converters is not limited to this. For example, two or more converters may be provided according to the number of power storage devices. The configurations of the first converter 12-1 and the second converter 12-2 will be described in detail later.

　平滑コンデンサＣは、主正母線ＭＰＬと主負母線ＭＮＬとの間に接続され、主正母線ＭＰＬおよび主負母線ＭＮＬに含まれる電力変動成分を低減する。電圧センサ２０は、主正母線ＭＰＬと主負母線ＭＮＬとの間の電圧Ｖｈを検出し、その検出値をＥＣＵ８０００へ出力する。なお、電圧Ｖｈは、第１インバータ３０－１および第２インバータ３０－２に入力される電圧である。以下においては、この電圧Ｖｈを「システム電圧Ｖｈ」とも記載する。 Smoothing capacitor C is connected between main positive bus MPL and main negative bus MNL, and reduces power fluctuation components included in main positive bus MPL and main negative bus MNL. Voltage sensor 20 detects voltage Vh between main positive bus MPL and main negative bus MNL, and outputs the detected value to ECU 8000. The voltage Vh is a voltage input to the first inverter 30-1 and the second inverter 30-2. Hereinafter, this voltage Vh is also referred to as “system voltage Vh”.

　電流センサ１４－１～１４－３は、第１蓄電装置１０－１に対して入出力される電流Ｉｂ１、第２蓄電装置１０－２に対して入出力される電流Ｉｂ２、および第３蓄電装置１０－３に対して入出力される電流Ｉｂ３をそれぞれ検出し、その検出値をＥＣＵ８０００へ出力する。なお、この図１では、各電流センサ１４－１～１４－３が正極線の電流を検出する場合が示されているが、各電流センサ１４－１～１４－３は負極線の電流を検出してもよい。 Current sensors 14-1 to 14-3 include current Ib1 input / output to / from first power storage device 10-1, current Ib2 input / output to / from second power storage device 10-2, and third power storage device. Current Ib3 input / output to / from 10-3 is detected, and the detected value is output to ECU 8000. FIG. 1 shows the case where each of the current sensors 14-1 to 14-3 detects the current of the positive line, but each of the current sensors 14-1 to 14-3 detects the current of the negative line. May be.

　電圧センサ１６－１～１６－３は、第１蓄電装置１０－１の電圧Ｖｂ１、第２蓄電装置１０－２の電圧Ｖｂ２、および第３蓄電装置１０－３の電圧Ｖｂ３をそれぞれ検出し、その検出値をＥＣＵ８０００へ出力する。 Voltage sensors 16-1 to 16-3 detect voltage Vb1 of first power storage device 10-1, voltage Vb2 of second power storage device 10-2, and voltage Vb3 of third power storage device 10-3, respectively. The detected value is output to ECU 8000.

　ＥＣＵ８０００は、電流センサ１４－１～１４－３および電圧センサ１６－１～１６－３，２０からの各検出値、ならびに車両要求パワーＰｓに基づいて、第１コンバータ１２－１および第２コンバータ１２－２をそれぞれ駆動するための駆動信号ＰＷＣ１，ＰＷＣ２、第１インバータ３０－１および第２インバータ３０－２をそれぞれ駆動するための駆動信号ＰＷＩＶ１，ＰＷＩＶ２、エンジン３６を制御するＰＷＥＮＧを生成する。そして、ＥＣＵ８０００は、その生成した駆動信号ＰＷＣ１，ＰＷＣ２，ＰＷＩＶ１，ＰＷＩＶ２，ＰＷＥＮＧを、それぞれ第１コンバータ１２－１、第２コンバータ１２－２、第１インバータ３０－１、第２インバータ３０－２、エンジン３６へ出力する。 The ECU 8000 determines the first converter 12-1 and the second converter 12 based on the detected values from the current sensors 14-1 to 14-3 and the voltage sensors 16-1 to 16-3, 20 and the vehicle required power Ps. Drive signals PWC1 and PWC2 for driving -2, respectively, drive signals PWIV1 and PWIV2 for driving the first inverter 30-1 and the second inverter 30-2, and PWENG for controlling the engine 36, respectively. Then, ECU 8000 uses the generated drive signals PWC1, PWC2, PWIV1, PWIV2, and PWENG as the first converter 12-1, the second converter 12-2, the first inverter 30-1, the second inverter 30-2, Output to the engine 36.

　ここで、ＥＣＵ８０００は、電源システム１から駆動力発生部２へ電力を供給する放電モード時（すなわち車両要求パワーＰｓ＞０）、第１コンバータ１２－１に接続される第１蓄電装置１０－１の放電余裕電力量と、第２切替装置１８－２によって第２コンバータ１２－２に接続可能な第２蓄電装置１０－２および第３蓄電装置１０－３の放電余裕電力量の合計との比率に応じて、第１蓄電装置１０－１と第２切替装置１８－２によって第２コンバータ１２－２に電気的に接続された蓄電装置とから放電される電力の配分を示す放電分配率を算出する。そして、ＥＣＵ８０００は、その算出された放電分配率に従って第１コンバータ１２－１および第２コンバータ１２－２を制御する。 Here, ECU 8000 is a first power storage device 10-1 connected to first converter 12-1 in a discharge mode in which power is supplied from power supply system 1 to driving force generation unit 2 (that is, vehicle required power Ps> 0). Between the discharge margin power amount of the second power storage device 10-2 and the third power storage device 10-3 connectable to the second converter 12-2 by the second switching device 18-2 Accordingly, a discharge distribution ratio indicating the distribution of power discharged from the first power storage device 10-1 and the power storage device electrically connected to the second converter 12-2 by the second switching device 18-2 is calculated. To do. ECU 8000 controls first converter 12-1 and second converter 12-2 in accordance with the calculated discharge distribution ratio.

　また、ＥＣＵ８０００は、駆動力発生部２から電源システム１へ電力が供給される充電モード時（すなわち車両要求パワーＰｓ＜０）、第１蓄電装置１０－１の充電余裕電力量と、第２切替装置１８－２によって第２コンバータ１２－２に電気的に接続された蓄電装置の充電余裕電力量との比率に応じて、第１蓄電装置１０－１と第２コンバータ１２－２に接続された蓄電装置とへ充電される電力の配分を示す充電分配率を算出する。そして、ＥＣＵ８０００は、その算出された充電分配率に従って第１コンバータ１２－１および第２コンバータ１２－２を制御する。 Further, ECU 8000, in the charging mode in which electric power is supplied from driving force generating unit 2 to power supply system 1 (that is, vehicle required power Ps <0), the amount of remaining charging power of first power storage device 10-1 and the second switching Connected to the first power storage device 10-1 and the second converter 12-2 according to the ratio of the charge margin power amount of the power storage device electrically connected to the second converter 12-2 by the device 18-2 A charge distribution ratio indicating distribution of electric power charged to the power storage device is calculated. ECU 8000 controls first converter 12-1 and second converter 12-2 in accordance with the calculated charge distribution ratio.

　さらに、車両１００には、ＨＶスイッチ１７が備えられる。ＨＶスイッチ１７は、ＨＶ走行を要求していることを示すＨＶ要求を運転者が入力するためのスイッチである。運転者によってＨＶスイッチ１７がオンされると、ＨＶスイッチ１７は、ＨＶ要求信号ＲｈｖをＥＣＵ８０００に出力する。 Furthermore, the vehicle 100 is provided with an HV switch 17. The HV switch 17 is a switch for the driver to input an HV request indicating that HV traveling is requested. When the HV switch 17 is turned on by the driver, the HV switch 17 outputs an HV request signal Rhv to the ECU 8000.

　ＥＣＵ８０００は、車両要求パワーＰｓ、各蓄電装置のＳＯＣ、ＨＶスイッチ１７からのＨＶ要求信号Ｒｈｖなどに基づいて、ＥＶ走行制御およびＨＶ走行制御のいずれの走行制御を実行する。 ECU 8000 executes either travel control of EV travel control or HV travel control based on vehicle required power Ps, SOC of each power storage device, HV request signal Rhv from HV switch 17, and the like.

　ＨＶ走行制御時には、各蓄電装置のＳＯＣが所定の範囲に含まれるように各ＭＧによる発電や回生、モータ出力が制御される。たとえば、ＥＣＵ８０００は、上述したように、各蓄電装置の充電が必要な場合には、停止中のエンジン３６を始動したり運転中のエンジン３６の出力を増加したりして各ＭＧによる発電量を増やして各蓄電装置に対する充電量を増加させる。 During HV traveling control, power generation, regeneration, and motor output by each MG are controlled so that the SOC of each power storage device is included in a predetermined range. For example, as described above, when the power storage devices need to be charged, the ECU 8000 starts the stopped engine 36 or increases the output of the operating engine 36 to increase the amount of power generated by each MG. Increase the amount of charge for each power storage device.

　図２は、図１に示した第１コンバータ１２－１および第２コンバータ１２－２の概略構成図である。なお、各コンバータの構成および動作は同様であるので、以下では主に第１コンバータ１２－１の構成および動作について説明する。 FIG. 2 is a schematic configuration diagram of the first converter 12-1 and the second converter 12-2 shown in FIG. Since the configuration and operation of each converter are the same, the configuration and operation of first converter 12-1 will be mainly described below.

　図２に示すように、第１コンバータ１２－１は、チョッパ回路４２－１と、正母線ＬＮ１Ａと、負母線ＬＮ１Ｃと、配線ＬＮ１Ｂと、平滑コンデンサＣ１とを含む。チョッパ回路４２－１は、スイッチング素子Ｑ１Ａ，Ｑ１Ｂと、ダイオードＤ１Ａ，Ｄ１Ｂと、リアクトルＬ１とを含む。 As shown in FIG. 2, the first converter 12-1 includes a chopper circuit 42-1, a positive bus LN1A, a negative bus LN1C, a wiring LN1B, and a smoothing capacitor C1. Chopper circuit 42-1 includes switching elements Q1A and Q1B, diodes D1A and D1B, and a reactor L1.

　正母線ＬＮ１Ａは、一方端がスイッチング素子Ｑ１Ｂのコレクタに接続され、他方端が主正母線ＭＰＬに接続される。負母線ＬＮ１Ｃは、一方端が負極線ＮＬ１に接続され、他方端が主負母線ＭＮＬに接続される。 Positive bus LN1A has one end connected to the collector of switching element Q1B and the other end connected to main positive bus MPL. Negative bus LN1C has one end connected to negative electrode line NL1 and the other end connected to main negative bus MNL.

　スイッチング素子Ｑ１Ａ，Ｑ１Ｂは、負母線ＬＮ１Ｃと正母線ＬＮ１Ａとの間に直列に接続される。具体的には、スイッチング素子Ｑ１Ａのエミッタが負母線ＬＮ１Ｃに接続され、スイッチング素子Ｑ１Ｂのコレクタが正母線ＬＮ１Ａに接続される。ダイオードＤ１Ａ，Ｄ１Ｂは、それぞれスイッチング素子Ｑ１Ａ，Ｑ１Ｂに逆並列に接続される。リアクトルＬ１は、スイッチング素子Ｑ１Ａ，Ｑ１Ｂの接続ノードと配線ＬＮ１Ｂとの間に接続される。 Switching elements Q1A and Q1B are connected in series between negative bus LN1C and positive bus LN1A. Specifically, the emitter of switching element Q1A is connected to negative bus LN1C, and the collector of switching element Q1B is connected to positive bus LN1A. Diodes D1A and D1B are connected in antiparallel to switching elements Q1A and Q1B, respectively. Reactor L1 is connected between a connection node of switching elements Q1A and Q1B and wiring LN1B.

　配線ＬＮ１Ｂは、一方端が正極線ＰＬ１に接続され、他方端がリアクトルＬ１に接続される。平滑コンデンサＣ１は、配線ＬＮ１Ｂと負母線ＬＮ１Ｃとの間に接続され、配線ＬＮ１Ｂおよび負母線ＬＮ１Ｃ間の直流電圧に含まれる交流成分を低減する。 Wiring LN1B has one end connected to positive line PL1 and the other end connected to reactor L1. Smoothing capacitor C1 is connected between line LN1B and negative bus LN1C, and reduces the AC component included in the DC voltage between line LN1B and negative bus LN1C.

　チョッパ回路４２－１は、ＥＣＵ８０００からの駆動信号ＰＷＣ１に応じて、第１蓄電装置１０－１と主正母線ＭＰＬおよび主負母線ＭＮＬとの間で双方向の直流電圧変換を行なう。 The chopper circuit 42-1 performs bidirectional DC voltage conversion between the first power storage device 10-1 and the main positive bus MPL and the main negative bus MNL in response to the drive signal PWC1 from the ECU 8000.

　駆動信号ＰＷＣ１は、スイッチング素子Ｑ１Ａ（以下、「下アーム素子Ｑ１Ａ」ともいう）のスイッチング周期Ｔ１Ａ（オン期間Ｔ１Ａｏｎとオフ期間Ｔ１Ａｏｆｆとの和）およびデューティー比（スイッチング周期Ｔ１Ａ内のオン期間Ｔ１Ａｏｎとオフ期間Ｔ１Ａｏｆｆとの比率）を制御する駆動信号ＰＷＣ１Ａと、スイッチング素子Ｑ１Ｂ（以下、「上アーム素子Ｑ１Ｂ」ともいう）のスイッチング周期Ｔ１Ｂ（オン期間Ｔ１Ｂｏｎとオフ期間Ｔ１Ｂｏｆｆとの和）およびデューティー比（スイッチング周期Ｔ１Ｂ内のオン期間Ｔ１Ｂｏｎとオフ期間Ｔ１Ｂｏｆｆとの比率）を制御する駆動信号ＰＷＣ１Ｂとを含む。 The drive signal PWC1 includes a switching period T1A (the sum of an on period T1Aon and an off period T1Aoff) and a duty ratio (an on period T1Aon within the switching period T1A and an off period) of the switching element Q1A (hereinafter also referred to as “lower arm element Q1A”). The drive signal PWC1A for controlling the ratio of the period T1Aoff), the switching period T1B of the switching element Q1B (hereinafter also referred to as “upper arm element Q1B”) (the sum of the on period T1Bon and the off period T1Boff), and the duty ratio (switching). And a drive signal PWC1B for controlling a ratio of an on period T1Bon and an off period T1Boff in the cycle T1B.

　ＥＣＵ８０００は、第１コンバータ１２－１を作動させる場合、下アーム素子Ｑ１Ａのスイッチング周期Ｔ１Ａと上アーム素子Ｑ１Ｂのスイッチング周期Ｔ１Ｂとを一致させ、かつ、下アーム素子Ｑ１Ａのスイッチング位相と上アーム素子Ｑ１Ｂのスイッチング位相とを反転させる（下アーム素子Ｑ１Ａのオン期間Ｔ１Ａｏｎに上アーム素子Ｑ１Ｂのオフ期間Ｔ１Ｂｏｆｆを設定し、下アーム素子Ｑ１Ａのオフ期間Ｔ１Ａｏｆｆに上アーム素子Ｑ１Ｂのオン期間Ｔ１Ｂｏｎを設定する）。これにより、下アーム素子Ｑ１Ａがオンかつ上アーム素子Ｑ１Ｂがオフの状態と、下アーム素子Ｑ１Ａがオフかつ上アーム素子Ｑ１Ｂがオンの状態とが交互に繰り返される。これにより、第１コンバータ１２－１による電圧変換が実行される。 When the first converter 12-1 is operated, the ECU 8000 matches the switching cycle T1A of the lower arm element Q1A and the switching cycle T1B of the upper arm element Q1B, and the switching phase of the lower arm element Q1A and the upper arm element Q1B. (The off period T1Boff of the upper arm element Q1B is set in the on period T1Aon of the lower arm element Q1A, and the on period T1Bon of the upper arm element Q1B is set in the off period T1Aoff of the lower arm element Q1A). . Thereby, the state where the lower arm element Q1A is on and the upper arm element Q1B is off and the state where the lower arm element Q1A is off and the upper arm element Q1B is on are alternately repeated. Thereby, voltage conversion by the first converter 12-1 is executed.

　同様にチョッパ回路４２－２は、ＥＣＵ８０００からの駆動信号ＰＷＣ２に応じて、第２蓄電装置１０－２および第３蓄電装置１０－３のいずれか一方と主正母線ＭＰＬおよび主負母線ＭＮＬとの間で双方向の直流電圧変換を行なう。 Similarly, chopper circuit 42-2 connects one of second power storage device 10-2 and third power storage device 10-3 to main positive bus MPL and main negative bus MNL in response to drive signal PWC2 from ECU 8000. Bidirectional DC voltage conversion is performed between them.

　駆動信号ＰＷＣ２は、スイッチング素子Ｑ２Ａ（以下、「下アーム素子Ｑ２Ａ」ともいう）のスイッチング周期Ｔ２Ａ（オン期間Ｔ２Ａｏｎとオフ期間Ｔ２Ａｏｆｆとの和）およびデューティー比（スイッチング周期Ｔ２Ａ内のオン期間Ｔ２Ａｏｎとオフ期間Ｔ２Ａｏｆｆとの比率）を制御する駆動信号ＰＷＣ２Ａと、スイッチング素子Ｑ２Ｂ（以下、「上アーム素子Ｑ２Ｂ」ともいう）のスイッチング周期Ｔ２Ｂ（オン期間Ｔ２Ｂｏｎとオフ期間Ｔ２Ｂｏｆｆとの和）およびデューティー比（スイッチング周期Ｔ２Ｂ内のオン期間Ｔ２Ｂｏｎとオフ期間Ｔ２Ｂｏｆｆとの比率）を制御する駆動信号ＰＷＣ２Ｂとを含む。 The drive signal PWC2 includes a switching period T2A (the sum of an on period T2Aon and an off period T2Aoff) and a duty ratio (an on period T2Aon and an off period within the switching period T2A) of the switching element Q2A (hereinafter also referred to as “lower arm element Q2A”). The drive signal PWC2A for controlling the ratio of the period T2Aoff), the switching period T2B of the switching element Q2B (hereinafter also referred to as “upper arm element Q2B”) (the sum of the on period T2Bon and the off period T2Boff), and the duty ratio (switching). And a drive signal PWC2B for controlling the ratio of the on period T2Bon and the off period T2Boff in the cycle T2B.

　ＥＣＵ８０００は、第２コンバータ１２－２を作動させる場合、下アーム素子Ｑ２Ａのスイッチング周期Ｔ２Ａと上アーム素子Ｑ２Ｂのスイッチング周期Ｔ２Ｂとを一致させ、かつ、下アーム素子Ｑ２Ａのスイッチング位相と上アーム素子Ｑ２Ｂのスイッチング位相とを反転させる（下アーム素子Ｑ２Ａのオン期間Ｔ２Ａｏｎに上アーム素子Ｑ２Ｂのオフ期間Ｔ２Ｂｏｆｆを設定し、下アーム素子Ｑ２Ａのオフ期間Ｔ２Ａｏｆｆに上アーム素子Ｑ２Ｂのオン期間Ｔ２Ｂｏｎを設定する）。これにより、下アーム素子Ｑ２Ａがオンかつ上アーム素子Ｑ２Ｂがオフの状態と、下アーム素子Ｑ２Ａがオフかつ上アーム素子Ｑ２Ｂがオンの状態とが交互に繰り返される。これにより、第２コンバータ１２－２による電圧変換が実行される。 When ECU 8000 operates second converter 12-2, switching cycle T2A of lower arm element Q2A and switching cycle T2B of upper arm element Q2B are matched, and the switching phase of lower arm element Q2A is matched with upper arm element Q2B. (The off period T2Boff of the upper arm element Q2B is set in the on period T2Aon of the lower arm element Q2A, and the on period T2Bon of the upper arm element Q2B is set in the off period T2Aoff of the lower arm element Q2A). . Thus, the state where the lower arm element Q2A is on and the upper arm element Q2B is off and the state where the lower arm element Q2A is off and the upper arm element Q2B are on are alternately repeated. Thereby, voltage conversion by the second converter 12-2 is executed.

　以上のような構成を有する電源システム１において、第１コンバータ１２－１を作動させる場合、下アーム素子Ｑ１Ａおよび上アーム素子Ｑ１Ｂのスイッチングが繰り返されることに起因して、リアクトルＬ１には、直流成分に交流成分が重畳した電流（リプル電流）が流れる。このリプル電流の交流成分の影響でリアクトルＬ１が振動し、リアクトルＬ１から高周波ノイズが発生してしまう。 In power supply system 1 having the above-described configuration, when first converter 12-1 is operated, reactor L1 has a direct current component due to repeated switching of lower arm element Q1A and upper arm element Q1B. A current (ripple current) in which an AC component is superimposed flows. Reactor L1 vibrates under the influence of the AC component of the ripple current, and high-frequency noise is generated from reactor L1.

　さらに、本実施の形態に係る車両１００（プラグイン車両）おいては、ＥＶ走行制御時の走行可能距離を所定の目標距離以上に確保するために、第１蓄電装置１０－１に加えて、第２蓄電装置１０－２および第３蓄電装置１０－３が備えられている。そして、第１蓄電装置１０－１と駆動力発生部２との間で電圧変換を行なう第１コンバータ１２－１に加えて、第２蓄電装置１０－２および第３蓄電装置１０－３のいずれか一方と駆動力発生部２との間で電圧変換を行なう第２コンバータ１２－２が備えられている。したがって、第１コンバータ１２－１と第２コンバータ１２－２とを同時に作動させる場合、リアクトルＬ１と同様に、リアクトルＬ２も振動し、リアクトルＬ２からも高周波ノイズが発生してしまう。この際、リアクトルＬ１の振動波形とリアクトルＬ２の振動波形とが重なってさらに大きな高周波ノイズが発生してしまうことが懸念される。 Furthermore, in vehicle 100 (plug-in vehicle) according to the present embodiment, in addition to first power storage device 10-1, in order to ensure a travelable distance during EV travel control that is equal to or greater than a predetermined target distance, Second power storage device 10-2 and third power storage device 10-3 are provided. In addition to the first converter 12-1 that performs voltage conversion between the first power storage device 10-1 and the driving force generator 2, any of the second power storage device 10-2 and the third power storage device 10-3 A second converter 12-2 that performs voltage conversion between one of them and the driving force generator 2 is provided. Therefore, when the first converter 12-1 and the second converter 12-2 are operated simultaneously, the reactor L2 vibrates similarly to the reactor L1, and high-frequency noise is also generated from the reactor L2. At this time, there is a concern that the vibration waveform of the reactor L1 and the vibration waveform of the reactor L2 overlap to generate a larger high-frequency noise.

　そこで、本実施の形態に係るＥＣＵ８０００は、第１コンバータ１２－１と第２コンバータ１２－２とを同時に作動させる場合、リアクトルＬ１を流れるリプル電流とリアクトルＬ２を流れるリプル電流とが逆位相となるように駆動信号ＰＷＣ１Ａと駆動信号ＰＷＣ１Ｂとを関連付けて制御するノイズ低減制御を実行することで、各リアクトルＬ１，Ｌ２で生じる振動（高周波ノイズ）を互いに打ち消してスイッチングノイズを低減する。 Therefore, when ECU 8000 according to the present embodiment simultaneously operates first converter 12-1 and second converter 12-2, the ripple current flowing through reactor L1 and the ripple current flowing through reactor L2 are in opposite phases. Thus, by executing the noise reduction control that controls the drive signal PWC1A and the drive signal PWC1B in association with each other, the vibrations (high-frequency noise) generated in the reactors L1 and L2 are canceled out to reduce the switching noise.

　図３は、上述のノイズ低減制御を実行する場合における、各駆動信号ＰＷＣ１Ａ，ＰＷＣ１Ｂの出力波形および各リアクトルＬ１，Ｌ２の振動波形を示す図である。 FIG. 3 is a diagram showing output waveforms of the drive signals PWC1A and PWC1B and vibration waveforms of the reactors L1 and L2 when the above-described noise reduction control is executed.

　上述のノイズ低減制御の最も特徴的な点は、第１コンバータ１２－１と第２コンバータ１２－２とを同時に作動させる場合において、第１コンバータ１２－１のスイッチング周期と第２コンバータ１２－２のスイッチング周期とを一致させるとともに、第１コンバータ１２－１のスイッチング位相と第２コンバータ１２－２のスイッチング位相とを反転させている点である。 The most characteristic point of the above-described noise reduction control is that when the first converter 12-1 and the second converter 12-2 are operated simultaneously, the switching cycle of the first converter 12-1 and the second converter 12-2. And the switching phase of the first converter 12-1 and the switching phase of the second converter 12-2 are reversed.

　具体的には、図３に示すように、駆動信号ＰＷＣ１Ｂのスイッチング周期Ｔ１Ｂ（すなわち駆動信号ＰＷＣ１Ａのスイッチング周期Ｔ１Ａ）と駆動信号ＰＷＣ２Ｂのスイッチング周期Ｔ２Ｂ（すなわち駆動信号ＰＷＣ２Ａのスイッチング周期Ｔ２Ａ）を一致させ、かつ、駆動信号ＰＷＣ１Ｂの出力波形と駆動信号ＰＷＣ２Ｂの出力波形とを逆位相に設定する。ここで、駆動信号ＰＷＣ１Ｂの出力波形と駆動信号ＰＷＣ２Ｂの出力波形とを逆位相に設定するとは、駆動信号ＰＷＣ１Ｂがオン期間Ｔ１Ｂｏｎに設定される間は駆動信号ＰＷＣ２Ｂをオフ期間Ｔ２Ｂｏｆｆに設定し、駆動信号ＰＷＣ１Ｂがオフ期間Ｔ１Ｂｏｆｆに設定される間は駆動信号ＰＷＣ２Ｂをオン期間Ｔ２Ｂｏｎに設定することである。なお、図３では、各駆動信号ＰＷＣ１Ｂ，ＰＷＣ１Ａ，ＰＷＣ２Ｂ，ＰＷＣ２Ａのデューティー比（オン期間とオフ期間との比率）がそれぞれ１対１に設定され、駆動信号ＰＷＣ１Ｂの出力波形と駆動信号ＰＷＣ２Ｂの出力波形とが互いに半周期ずらして設定される。 Specifically, as shown in FIG. 3, the switching cycle T1B of the drive signal PWC1B (that is, the switching cycle T1A of the drive signal PWC1A) and the switching cycle T2B of the drive signal PWC2B (that is, the switching cycle T2A of the drive signal PWC2A) are matched. In addition, the output waveform of the drive signal PWC1B and the output waveform of the drive signal PWC2B are set in opposite phases. Here, when the output waveform of the drive signal PWC1B and the output waveform of the drive signal PWC2B are set in opposite phases, the drive signal PWC2B is set to the off period T2Boff while the drive signal PWC1B is set to the on period T1Bon. While the signal PWC1B is set to the off period T1Boff, the drive signal PWC2B is set to the on period T2Bon. In FIG. 3, the duty ratios (ratio between on period and off period) of the drive signals PWC1B, PWC1A, PWC2B, and PWC2A are set to 1: 1, respectively, and the output waveform of the drive signal PWC1B and the output of the drive signal PWC2B The waveform is set so as to be shifted from each other by a half cycle.

　これにより、上アーム素子Ｑ１Ｂがオンの場合（下アーム素子Ｑ１Ａがオフの場合）には上アーム素子Ｑ２Ｂがオフ（下アーム素子Ｑ２Ａがオン）され、上アーム素子Ｑ１Ｂがオフの場合（下アーム素子Ｑ１Ａがオンの場合）には、上アーム素子Ｑ２Ｂがオン（下アーム素子Ｑ２Ａがオフ）される。 Accordingly, when the upper arm element Q1B is on (when the lower arm element Q1A is off), the upper arm element Q2B is turned off (lower arm element Q2A is on), and when the upper arm element Q1B is off (lower arm) When the element Q1A is on), the upper arm element Q2B is turned on (the lower arm element Q2A is turned off).

　そのため、図３に示すように、リアクトルＬ１の振動波形とリアクトルＬ２の振動波形とが互いに逆位相となる。これにより、リアクトルＬ１，Ｌ２の一方で生じる高周波ノイズを他方で生じる高周波ノイズで打ち消すことができる。そのため、車両１００のユーザに聞こえるスイッチングノイズを低減することができる。 Therefore, as shown in FIG. 3, the vibration waveform of the reactor L1 and the vibration waveform of the reactor L2 are in opposite phases. Thereby, the high frequency noise generated on one side of reactors L1 and L2 can be canceled by the high frequency noise generated on the other side. Therefore, switching noise that can be heard by the user of vehicle 100 can be reduced.

　なお、上述のノイズ低減制御は、必ずしも常に実行される必要はない。たとえば、図３に示したようなデューティー比の設定が可能な場合に限ってノイズ低減制御を実行するようにしてもよい。また、車両要求パワーＰｓが比較的安定している定常状態なのか、車両要求パワーＰｓが急激に変化している過渡状態なのかを判断し、定常状態である場合にノイズ低減制御を実行するようにしてもよい。また、たとえば、ロードノイズなどに影響する車速の情報に基づいてユーザにノイズが聞こえ易い状態であるか否かを判断し、ノイズが聞こえ易い状態である場合にノイズ低減制御を実行するようにしてもよい。 Note that the noise reduction control described above need not always be executed. For example, the noise reduction control may be executed only when the duty ratio can be set as shown in FIG. Further, it is determined whether the vehicle required power Ps is in a steady state in which the vehicle required power Ps is relatively stable or in a transient state in which the vehicle required power Ps is changing rapidly. It may be. Further, for example, it is determined whether or not it is easy for the user to hear noise based on vehicle speed information that affects road noise or the like, and if noise is easily heard, noise reduction control is executed. Also good.

　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Claims (5)

　電力を消費する負荷（２）と電力を授受可能な電源システムであって、
　各々が前記負荷（２）に並列に電気的に接続された第１電源（１０－１）および第２電源（１０－２、１０－３）と、
　前記負荷（２）と前記第１電源（１０－１）との間に設けられ、与えられる第１波形信号に応じてスイッチング動作を行なうことによって、前記負荷（２）と前記第１電源（１０－１）との間で電圧変換を行なう第１コンバータ（１２－１）と、
　前記負荷（２）と前記第２電源（１０－２、１０－３）との間に設けられ、与えられる第２波形信号に応じたスイッチング動作を行なうことによって、前記負荷（２）と前記第２電源（１０－２、１０－３）との間で電圧変換を行なう第２コンバータ（１２－２）と、
　前記第１コンバータ（１２－１）のスイッチング動作と前記第２コンバータ（１２－２）のスイッチング動作とが互いに逆位相となるように、前記第１波形信号および前記第２波形信号を制御する制御装置（８０００）とを含む、電源システム。 A power supply system that can exchange power with a load (2) that consumes power,
A first power source (10-1) and a second power source (10-2, 10-3), each electrically connected in parallel to the load (2);
Provided between the load (2) and the first power source (10-1), and performing a switching operation in accordance with a given first waveform signal, the load (2) and the first power source (10) -1), a first converter (12-1) that performs voltage conversion with
A switching operation is performed between the load (2) and the second power source (10-2, 10-3) according to the applied second waveform signal, whereby the load (2) and the second power source (10-2, 10-3) are performed. A second converter (12-2) for performing voltage conversion between two power sources (10-2, 10-3);
Control for controlling the first waveform signal and the second waveform signal so that the switching operation of the first converter (12-1) and the switching operation of the second converter (12-2) are in opposite phases to each other. A power supply system comprising a device (8000). 　前記制御装置（８０００）は、前記第１波形信号の周期と前記第２波形信号の周期とを一致させ、かつ前記第１波形信号の位相と前記第２波形信号の位相とを半周期ずらして設定する、請求の範囲第１項に記載の電源システム。 The control device (8000) matches the cycle of the first waveform signal and the cycle of the second waveform signal, and shifts the phase of the first waveform signal and the phase of the second waveform signal by a half cycle. The power supply system according to claim 1, which is set. 　前記第１コンバータ（１２－１）は、正極側が前記負荷（２）の正極側に接続された第１上側アーム（Ｑ１Ｂ）と、正極側が前記第１上側アーム（Ｑ１Ｂ）の負極側に接続され、負極側が前記負荷（２）の負極側および前記第１電源（１０－１）の負極側に接続された第１下側アーム（Ｑ１Ａ）と、前記第１上側アーム（Ｑ１Ｂ）および前記第１下側アーム（Ｑ１Ａ）の中間点と前記第１電源（１０－１）の陽極側との間に設けられた第１リアクトル（Ｌ１）とを含み、
　前記第２コンバータ（１２－２）は、正極側が前記負荷（２）の正極側に接続された第２上側アーム（Ｑ２Ｂ）と、正極側が前記第２上側アーム（Ｑ２Ｂ）の負極側に接続され、負極側が前記負荷（２）の負極側および前記第２電源（１０－２、１０－３）の負極側に接続された第２下側アーム（Ｑ２Ａ）と、前記第２上側アーム（Ｑ２Ｂ）および前記第２下側アーム（Ｑ２Ａ）の中間点と前記第２電源（１０－２、１０－３）の陽極側との間に設けられた第２リアクトル（Ｌ２）とを含み、
　前記第１波形信号には、前記第１上側アーム（Ｑ１Ｂ）を制御するための第１上側信号と、前記第１下側アーム（Ｑ１Ａ）を制御するための第１下側信号とが含まれ、
　前記第２波形信号には、前記第２上側アーム（Ｑ２Ｂ）を制御するための第２上側信号と、前記第２下側アーム（Ｑ２Ａ）を制御するための第２下側信号とが含まれ、
　前記制御装置は、前記第１上側信号と前記第２上側信号とを互いに逆位相に設定するとともに、前記第１下側信号と前記第２下側信号とを互いに逆位相に設定する、請求の範囲第１項に記載の電源システム。 The first converter (12-1) has a positive side connected to a positive side of the load (2) and a positive side connected to a negative side of the first upper arm (Q1B). A first lower arm (Q1A) whose negative electrode side is connected to a negative electrode side of the load (2) and a negative electrode side of the first power source (10-1), the first upper arm (Q1B) and the first A first reactor (L1) provided between an intermediate point of the lower arm (Q1A) and the anode side of the first power source (10-1),
The second converter (12-2) has a positive side connected to the positive side of the load (2) and a positive side connected to the negative side of the second upper arm (Q2B). A second lower arm (Q2A) whose negative electrode side is connected to the negative electrode side of the load (2) and the negative electrode side of the second power source (10-2, 10-3), and the second upper arm (Q2B) And a second reactor (L2) provided between an intermediate point of the second lower arm (Q2A) and the anode side of the second power source (10-2, 10-3),
The first waveform signal includes a first upper signal for controlling the first upper arm (Q1B) and a first lower signal for controlling the first lower arm (Q1A). ,
The second waveform signal includes a second upper signal for controlling the second upper arm (Q2B) and a second lower signal for controlling the second lower arm (Q2A). ,
The control device sets the first upper signal and the second upper signal in opposite phases, and sets the first lower signal and the second lower signal in opposite phases. The power supply system according to claim 1 in the range. 　前記制御装置は、前記第１上側信号、前記第１下側信号、前記第２上側信号、および前記第２下側信号の各々に対して互いに長さが等しいオン期間とオフ期間とを交互に設定し、前記第１上側信号が前記オン期間であるときは、前記第２上側信号を前記オフ期間に設定するとともに前記第１下側信号を前記オフ期間、前記第２下側信号を前記オン期間に設定し、前記第１上側信号が前記オフ期間であるときは、前記第２上側信号を前記オン期間に設定するとともに前記第１下側信号を前記オン期間、前記第２下側信号を前記オフ期間に設定する、請求の範囲第３項に記載の電源システム。 The controller alternately turns on and off periods that are equal in length to each of the first upper signal, the first lower signal, the second upper signal, and the second lower signal. And when the first upper signal is in the on period, the second upper signal is set in the off period, the first lower signal is in the off period, and the second lower signal is in the on period. When the first upper signal is the off period, the second upper signal is set to the on period, the first lower signal is the on period, and the second lower signal is the second upper signal. The power supply system according to claim 3, wherein the power supply system is set to the off period. 　前記電源システムは、車両に搭載され、
　前記負荷（２）は、前記車両の駆動力を発生する回転電機（３２－２）である、請求の範囲第１項に記載の電源システム。 The power supply system is mounted on a vehicle,
The power supply system according to claim 1, wherein the load (2) is a rotating electrical machine (32-2) that generates a driving force of the vehicle.
PCT/JP2009/052149 2009-02-09 2009-02-09 Power source system Ceased WO2010089888A1 (en)

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Citations (3)

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JP2004357388A (en) * 2003-05-28 2004-12-16 Denso Corp Polyphase multiplex control system
JP2005143284A (en) * 2003-08-21 2005-06-02 Marvell World Trade Ltd Voltage regulator
JP2008005625A (en) * 2006-06-22 2008-01-10 Toyota Motor Corp Voltage conversion device and vehicle equipped with the same

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2004357388A (en) * 2003-05-28 2004-12-16 Denso Corp Polyphase multiplex control system
JP2005143284A (en) * 2003-08-21 2005-06-02 Marvell World Trade Ltd Voltage regulator
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