WO2007111286A1 - 電動機駆動制御システムおよびその制御方法 - Google Patents
電動機駆動制御システムおよびその制御方法 Download PDFInfo
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- WO2007111286A1 WO2007111286A1 PCT/JP2007/056132 JP2007056132W WO2007111286A1 WO 2007111286 A1 WO2007111286 A1 WO 2007111286A1 JP 2007056132 W JP2007056132 W JP 2007056132W WO 2007111286 A1 WO2007111286 A1 WO 2007111286A1
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- Prior art keywords
- voltage
- motor
- control system
- drive control
- electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/445—Differential gearing distribution type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/14—Preventing excessive discharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/52—Drive Train control parameters related to converters
- B60L2240/525—Temperature of converter or components thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/142—Emission reduction of noise acoustic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/08—Electric propulsion units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits specially adapted for starting of engines
- F02N2011/0881—Components of the circuit not provided for by previous groups
- F02N2011/0888—DC/DC converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
- H02P2201/09—Boost converter, i.e. DC-DC step up converter increasing the voltage between the supply and the inverter driving the motor
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Definitions
- the present invention relates to an electric motor drive control system and a control method therefor, and more specifically, to a control technology for an electric motor drive control system including a converter configured to be capable of boosting an output voltage of a DC power supply.
- an electric motor drive control system that controls the drive of an AC motor by converting DC power from a DC power source into AC power by a power converter (typically an inverter) is generally used.
- a power converter typically an inverter
- high-frequency and high-power switching is used to perform power conversion. Therefore, a switching element (such as an IGBT: Insulated Gate Bipolar Transistor) is used for high-power switching.
- ⁇ should be configured to avoid heat generation of the transistor) in particular, when they are driven by the power-varying exchanger such as inverters permanent magnet excited type synchronous motor (Romyu motor) or the like, the rotation of the motor force When locked by, current concentrates on only one phase of the multiple phase windings provided in the motor.
- the switching element corresponding to this phase among a plurality of switching elements provided in the power converter (inverter) suddenly generates heat. If such sudden heat is generated, the switching element may be thermally destroyed. For this reason, a configuration has been proposed to suppress the heat generated by the switching elements that make up the power change (inverter) when the motor is locked.
- Patent Document 1 Japanese Patent Application Laid-Open No. 9-7 0 1 95 (hereinafter referred to as Patent Document 1) describes a carrier frequency of a PWM (pulse width modulation) signal from a normal frequency (10 kHz) when a motor is locked. By switching to a low frequency (1.25 kHz), the switching frequency of the switching element of the inverter is lowered to reduce the switching loss. Avoid.
- PWM pulse width modulation
- Patent Document 2 Japanese Patent Laid-Open No. 2 0 5-1 1 7 7 5 8
- Patent Document 2 Japanese Patent Laid-Open No. 2 0 5-1 1 7 7 5 8
- Patent Document 2 Japanese Patent Laid-Open No. 2 0 5-1 1 7 7 5 8
- a configuration is disclosed in which the switching element is turned on / off by both of the drive circuits while the switching element is turned on / off only by the drive circuit while the motor is in the hook state. According to such a configuration, heat generation can be reduced by making the switching element steep on and off in the locked state and suppressing the switching loss as compared with the normal state.
- Patent Document 3 Japanese Patent Laid-Open No. 9 1 2 3 5 8 8 (hereinafter referred to as Patent Document 3) describes a lock for a motor in which a constant current continuously flows based on the integral value of the square of the motor drive current of each phase. It is disclosed that the condition is detected early to protect the inverter.
- a DC voltage from a DC power supply can be boosted by a converter, and the DC voltage variably controlled by a converter is converted to an AC voltage by an inverter to drive and control the AC motor.
- the configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 2 03-3-3 099 997 (hereinafter referred to as Patent Document 4).
- Patent Document 4 Japanese Patent Application Laid-Open No. 2 03-3-3 099 997
- the AC voltage amplitude applied to the electric motor can be made variable according to the operating state of the electric motor, so that the electric motor can be operated with high efficiency and high output can be obtained. Disclosure of the invention
- Patent Document 4 discloses reliable detection of the locked state, but does not mention a technique for preventing the switching element from generating heat in the mouth-locked state.
- the present invention has been made to solve such problems, and an object of the present invention is to provide an electric motor drive control system including a converter configured to be capable of boosting the output voltage of a DC power supply.
- an efficient control configuration suppresses a temperature rise due to heat generation of each switching element constituting the power converter (inverter) when the motor is locked.
- An electric motor drive control system includes a DC power supply, a converter, a first inverter, voltage setting means, lock detection means, and voltage limiting means.
- the converter is configured to be capable of boosting the output voltage of the DC power supply, and is configured to variably control the output voltage of the DC power supply in accordance with the voltage command value and to output the DC power supply wiring.
- the first inverter performs power conversion between the DC power on the DC power supply wiring and the AC power that drives the motor by a plurality of switching elements so that the motor operates according to the operation command.
- the voltage setting means sets the voltage command value of the converter according to the operating state of the motor.
- the lock detection means is configured to detect the lock state of the electric motor.
- the voltage limiting means sets the voltage command value to the lower one of the voltage command value set by the voltage setting means and the predetermined limit voltage when the lock detection means detects the locked state.
- the motor drive control system is configured to be capable of boosting the output voltage of the DC power supply and the DC power supply, and variably controls the output voltage of the DC power supply according to the voltage command value.
- the control method includes a step of setting a voltage command value of the converter, a step of detecting the lock state of the motor, and depending on the operation state of the motor when the lock state is detected. The lower of the voltage command value and the specified limit voltage And a step of limiting the voltage command value.
- the voltage command value is set so that the converter output voltage is lower than the limit voltage, and the direct current switched by the first inverter is set.
- the voltage can be lowered.
- the smaller the DC voltage that is switched by the inverter the lower the switching loss in each switching device. It is possible to reduce the switching loss in the switching element in the specific phase where the concentration is concentrated, and to suppress the temperature rise due to the heat generation. Furthermore, at this time, unlike the reduction in power loss due to a decrease in switching frequency, controllability and audible noise do not occur, and the size of the circuit due to the parallel drive circuit may increase costs. Absent.
- the temperature of the switching element can be designed to be low in anticipation of a gradual rise in temperature when the motor is locked, which has severe operating conditions, so that the switching element can be reduced in size and cost. It is. 'Preferably, in the electric motor drive control system and the control method thereof according to the present invention, the limiting voltage is equal to the output voltage of the DC power supply.
- the boosting by the converter can be prohibited and the DC voltage that is not switched by the first inverter can be set low. Therefore, the temperature rise effect of the switching element of the inverter (first inverter) when the motor is locked can be greatly obtained. .
- the electric motor drive control system further includes a generator and a second inverter.
- the generator is configured to be rotatable by external force.
- the second inverter performs power conversion between the DC power on the DC power supply wiring and the AC power that drives the generator by a plurality of switching elements so that the generator operates according to the operation command.
- the voltage setting means sets the voltage command value of the converter in accordance with the operating state of the generator in addition to the operating state of the motor.
- the voltage setting means includes a first setting means for calculating a voltage command value to be set corresponding to the operating state of the motor, and a voltage command value to be set corresponding to the operating state of the generator. Second setting means for calculating, and third setting means for setting the voltage command value of the converter to the higher one of the voltage command values calculated by the first and second setting means.
- the motor drive control system includes a generator configured to be rotationally driven by an external force, and a plurality of switching units so that the generator operates according to an operation command.
- the device further includes a second inverter that performs power conversion between the DC power on the DC power supply wiring and the AC power that drives the generator.
- the step of setting the voltage command value is set corresponding to the operating state of the motor so that the voltage command value of the converter is further set according to the operating state of the generator in addition to the operating state of the motor.
- a first sub-step for calculating a voltage command value to be set a second sub-step for calculating a voltage command value to be set corresponding to the operating state of the generator, And a third sub-step for setting the voltage command value of the converter to the higher one of the voltage command values calculated by the second sub-step.
- the voltage command value of the comparator output voltage can be set appropriately according to Furthermore, when the electric motor is locked, the output voltage of the converter becomes lower than the limit voltage, so that the temperature rise of the switching elements constituting the inverter (first inverter) corresponding to the electric motor can be suppressed. .
- the motor drive control system further includes power generation ensuring means.
- the power generation securing means is configured to supply power from the generator to the DC power supply wiring when the lock detection means detects the locked state of the motor.
- the power generation securing means can be configured to set a limit voltage so that power can be supplied from the generator to the DC power supply wiring when the locked state of the motor is detected.
- the second inverter is configured to include a rectifying element connected so as to be able to conduct power to the DC power supply wiring, and the power generation securing means is in the second inverter when the lock detection means detects the locked state.
- Each of the switching elements is turned off, and the rotational speed of the electrical machinery can be increased so that the amplitude of the AC voltage induced in the generator is higher than the voltage of the DC power supply wiring.
- control method of the motor drive control system secures power generation by the generator so that power is supplied from the generator to the DC power supply wiring when detecting the state of the mouth of the motor.
- the method further includes a step.
- a limit voltage is set so that power can be supplied from the generator to the DC power supply wiring when the locked state of the motor is detected.
- the second inverter is configured so as to include a rectifying element connected in parallel with each of the plurality of switching elements so that the power generated by the generator can be guided to the DC power supply wiring, and then power generation is ensured.
- the step is to turn off each switching element in the second inverter when detecting the locked state of the motor and to make the generator so that the amplitude of the AC voltage induced in the generator is higher than the voltage of the DC power supply wiring. Increase the rotation speed.
- the electric motor drive control system is mounted on a vehicle, and the electric motor is configured to generate a driving force of the vehicle.
- the inverter in the motor drive control system that controls the drive of the motor configured to generate the driving force of the vehicle, the inverter (first inverter) is generated when the motor is locked.
- the temperature rise of the switching element can be suppressed.
- the vehicle driving force can be generated by the electric motor in the locked state for a longer time, so that the vehicle performance is improved.
- the electric motor drive control system when the electric motor drive control system according to the present invention is mounted on a vehicle, the electric motor drive control system further includes a stall detection means and an operation area restriction means.
- the stall detection means includes an accelerator pedal and a brake pedal.
- the operation range limiting means detects the motor operating range when the lock detection status is detected by the lock detection means and the stall detection status is detected by the stall detection means.
- the motor operation command value is generated so as to be limited within a predetermined low rotational speed range and within a low output torque range, or the control method is a stall in which both the vehicle accelerator pedal and the brake pedal are operated.
- the step of detecting the state, the locked state of the motor is detected, and the stalled state is detected.
- the motor drive control system and the control method thereof are further provided with a step of generating an operation command value of the motor so as to limit the operation region of the motor within a predetermined low rotational speed region and a low output torque region.
- the operating range of the motor is also within a constant range of low rotational speed and low output torque.
- the electric motor drive control system is mounted on a vehicle, and the electric motor is configured to generate a driving force of the vehicle. Further, the vehicle is equipped with an engine that operates by burning fuel and a starter motor that is supplied with a voltage higher than the output voltage of the DC power supply from the DC power supply wiring and starts the engine.
- the electric motor drive control system further includes start restriction means. The start restriction means restricts engine start when the lock detection means detects the locked state of the motor.
- the control method further includes a step of restricting start of the engine when detecting a locked state of the electric motor.
- the electric motor drive control system and the control method thereof when the motor is mounted on a hybrid vehicle having an engine and a starter motor that starts the engine using the output voltage of the converter, the electric motor is locked.
- the engine start when the condition occurs, the rise in the converter output voltage is limited, It is possible to suppress the temperature rise of the switching elements constituting the inverter (first inverter) that controls the drive of the electric motor.
- the electric motor drive control system is mounted on a vehicle, and the electric motor is configured to generate a driving force of the vehicle. Furthermore, the vehicle is equipped with an engine that operates by fuel combustion, and a starter motor that is supplied with a voltage higher than the output voltage of the DC power supply from the DC power supply and starts the engine.
- the motor drive control system further includes start ensuring means. The start ensuring means determines the converter's voltage command value only for a predetermined period required for starting the engine when the start of the engine is instructed upon detection of the mouth-open state by the mouth-pick detecting means. Temporarily increase the starting motor to the required voltage.
- control method is as follows: When the start of the engine is instructed when detecting the locked state of the motor, the voltage command value of the converter is set to the required voltage of the starter motor only for a predetermined period required for starting the engine. The method further includes the step of temporarily raising.
- the engine start command is issued.
- the converter output voltage can be temporarily increased to the required voltage of the starting motor only during a certain period. Therefore, the engine can be started even when the engine is locked, and the switching element in the inverter (first inverter) that controls the drive of the motor by limiting the boost by the converter during other periods. Temperature rise can be suppressed.
- the starter motor can generate electric power by being rotationally driven by at least a part of the engine output when the engine is operating, and the engine can be stopped.
- the engine can be stopped.
- it is composed of a motor generator that can start the engine by generating torque that rotates the engine.
- the main advantage of the present invention is that the motor drive control of the configuration including the converter configured to be capable of boosting the output voltage of the DC power supply has a simple configuration without causing a decrease in controllability and generation of audible noise. This is because the temperature rise due to heat generation of each switching element constituting the power converter (inverter) can be suppressed when the motor lock occurs.
- FIG. 1 is a block diagram illustrating a configuration of a hybrid vehicle shown as an example of a configuration in which an electric motor drive control system according to an embodiment of the present invention is mounted.
- FIG. 2 is a flowchart illustrating voltage command value setting of the buck-boost converter according to Embodiment 1 of the present invention.
- FIG. 3 is a first conceptual diagram illustrating the relationship between the operating state of the motor generator and the necessary voltage. '
- FIG. 4 is a second conceptual diagram illustrating the relationship between the operating state of the motor generator and the required voltage.
- Fig. 5 is a waveform diagram illustrating the switching loss that occurs in each switching element in the inverter.
- FIG. 6 is a flowchart illustrating a first example of voltage command value setting of the buck-boost converter according to the second embodiment of the present invention.
- FIG. 7 is a flowchart for explaining a second example of voltage command value setting of the buck-boost converter according to Embodiment 2 of the present invention.
- FIG. 8 is a collinear diagram illustrating the control operation in step S 1 70 of FIG.
- FIG. 9 is a flowchart illustrating vehicle control according to the third embodiment of the present invention.
- FIG. 10 is a broacher for explaining vehicle control according to a modification of the third embodiment of the present invention.
- FIG. 11 is a flowchart illustrating vehicle control according to the fourth embodiment of the present invention.
- FIG. 12 is a conceptual diagram showing the operation area of the motor generator.
- FIG. 13 is a collinear diagram illustrating an example of the control operation in step S 2 30 of FIG.
- FIG. 1 is a block diagram illustrating a configuration of a hybrid vehicle 100 shown as an example of a configuration in which an electric motor drive control system according to an embodiment of the present invention is mounted.
- hybrid vehicle 1 0 0 includes engine 1 1 0, power split device mechanism 1 2 0, motor generators MG 1 and MG 2, reducer 1 3 0, and drive shaft 1 4 0. And wheels (drive wheels) 1 5 0.
- the hybrid vehicle 1 0 0 further includes a DC voltage generator 1 0 #, a smoothing capacitor CO, inverters 2 0 and 3 0, and a control device 5 0 for driving and controlling the motor generators MG 1 and MG 2.
- 'Engine 1 1 0 is composed of an internal combustion engine such as a gasoline engine or a diesel engine.
- the engine 110 is provided with a coolant temperature sensor 1.12 that detects the coolant temperature.
- the output of the cooling water temperature sensor 1 1 2 is sent to the control device 50.
- Power split device 1 2 0 is configured to be able to split the power generated by engine 1 1 0 into a route to drive shaft 1 4 0 and a route to motor generator MG 1.
- a planetary gear mechanism having three rotation shafts of a sun gear, a planetary gear, and a ring gear can be used.
- the rotor of motor generator MG 1 is hollow and the crank shaft of engine 110 is passed through the center of the rotor, so that engine 1 10 and motor generators MG 1 and MG 2 are mechanically connected to power split mechanism 1 2 0. Can be connected.
- the motor generator MG 1 Connect the rotor to the sun gear, connect the output shaft of the engine 110 to the planetary gear, and connect the output shaft 1 25 to the ring gear.
- Output shaft 1 2 5 connected to the rotation shaft of motor generator MG 2 is connected to drive shaft 1 4 0 for rotationally driving drive wheels 1 5 0 via reduction gear 1 3 0.
- a reduction gear for the rotation shaft of motor generator MG 2 may be further incorporated.
- the motor generator MG 1 operates as a generator driven by the engine 110 and operates as an electric motor for starting the engine 110, so that it has both functions of the motor and the generator. Configured. That is, motor generator MG 1 corresponds to the “generator” in the present invention, and inverter 20 connected to motor generator MG 1 corresponds to the “second inverter” in the present invention.
- motor generator MG 2 is incorporated into hybrid vehicle 1 0 0 for generating vehicle driving force whose output is transmitted to drive shaft 1 4 0 via output shaft 1 2 5 and reducer 1 3 0. It is. Further, motor generator MG 2 is configured to have a function for the electric motor and the generator so as to perform regenerative power generation by generating an output torque in a direction opposite to the rotation direction of wheels 1 5 0. That is, in the hybrid vehicle 100, the motor generator MG2 corresponds to the “motor” in the present invention. Similarly, inverter 30 connected to motor generator MG 2 corresponds to “first inverter J in the present invention. Next, a configuration for driving and controlling motor generators MG 1 and MG 2 ′ will be described. ..
- DC voltage generation unit 10 # includes a traveling battery B, a smoothing capacitor C 1, and a step-up / down converter 15.
- the traveling battery B corresponds to the “DC power supply” in the present invention
- the step-up / down converter 15 corresponds to the “converter” in the present invention.
- a secondary battery such as nickel hydrogen or lithium ion can be applied.
- the traveling battery B composed of the secondary battery is a “DC power supply”.
- a power storage device such as an electric double layer capacitor is used. It is also possible to apply.
- Battery voltage V b output from battery B for running is detected by voltage sensor 10
- the battery current Ib input / output to / from the traveling battery B is detected by the current sensor 11.
- a temperature sensor 12 is provided in the traveling battery B. Note that the temperature sensor 12 may be provided at a plurality of locations of the traveling battery B because the temperature of the traveling battery B may be locally different.
- the battery voltage V b, the battery current I b, and the battery temperature T b detected by the voltage sensor 10, the current sensor 1 1, and the temperature sensor 1 2 are output to the control device 50.
- the smoothing capacitor C 1 is connected between the ground line 5 and the power supply line 6.
- the relay between the positive terminal of traveling battery B and power line 6 and between the negative terminal of traveling battery B and ground line 5 is turned on when the vehicle is operating and is turned off when the vehicle is stopped. (Not shown) is provided.
- the step-up / down converter 15 includes a reactor 1 and power semiconductor elements (hereinafter referred to as “switching elements”) Q 1 and Q 2 that are switching controlled.
- Reactor 1 is connected between a connection node of switching elements Q 1 and Q 2 and power supply line 6.
- the smoothing capacitor C O is connected between the power supply line 7 and the ground line 5.
- the power semiconductor switching elements Q 1 and Q 2 are connected in series between the power line 7 and the ground line 5. On / off of power semiconductor switching elements Q 1 and Q 2 is controlled by switching control signals S 1 and S 2 from control device 50.
- an IGBT, a power MOS (Metal Oxide Semiconductor) transistor, a power bipolar transistor, or the like can be used as the switching element.
- Anti-parallel diodes D l and D 2 are arranged for switching elements Q l 'and Q 2.
- the DC voltage side of the inverters 20 and 30 is connected to the buck-boost converter 15 via the common ground line 5 and the power source, line 7. That is, the power supply line 7 corresponds to the “DC power supply wiring” in the present invention.
- Inverter 20 includes a U-phase arm 22, a V-phase arm 24, and a W-phase arm 26 provided in parallel between power supply line 7 and ground line 5.
- Each phase arm is a switching element connected in series between power line 7 and ground line 5.
- U-phase arm 2 2 is composed of switching elements Q 1 1 and Q 1
- V-phase arm 2 4 is composed of switching elements Q 1 3 and Q 1 4
- W-phase arm 2 6 is switching element It consists of Q 15 and Q 16.
- anti-parallel diodes D 1 1 to D 16 are connected to switching elements Q 11 to Q 16, respectively. Switching elements Q 11 -Q 16 are turned on / off by switching control signals S 11 -S 16 from control device 50.
- Motor generator MG 1 includes a U-phase coil wire U 1, a V-phase coil wire Vi and a W-phase coil wire W 1 provided on the stator, and a rotor (not shown).
- U-phase coil wire U 1, V-phase coil wire V 1 and W-phase coil wire W 1 are connected to each other at neutral point N 1, and the other end is the U-phase arm 2 of inverter 2.0 2, V-phase arm 2 4. and W-phase arm 2 6 are connected.
- the inverter 20 is connected to the DC voltage generator 1 0 # by the on / off control (switching control) of the switching elements Q 1 1 to Q 16 in response to the switching control signals S 11 to S 16 from the control device 50. Bidirectional power conversion between the motor generator MG1.
- inverter 20 converts the DC voltage received from power supply line 7 into a three-phase AC voltage according to switching control by control device 50, and converts the converted three-phase AC voltage to motor generator MG 1 Can be output. As a result, motor generator MG 1 is driven to generate the designated torque. Inverter 20 also converts the three-phase AC voltage generated by motor generator MG 1 in response to the output of engine 110 to a direct current voltage according to switching control by controller 50, and the converted DC voltage is supplied to power supply. It can also be output to line 7.
- the inverter 30 is configured in the same manner as the inverter 20, and is switched on and off by switching control signals S 2 1 to S 2 6 and an anti-parallel diode D 2 1 ⁇ D 2 6 is included.
- Motor generator MG 2 is configured in the same way as motor generator MG 1 and includes U-phase coil wire U 2, V-phase coil winding V 2 and W-phase coil wire W 2 provided on the stator, not shown. Including a rotor. As with motor generator MG1, one end of U-phase coil winding U2, V-phase coil wire V2 and W-phase coil wire W2 are connected to each other at neutral point N2, and the other end is connected to the inverter. 3 0 U-phase arm 3 2, Connected to V-phase arm 3 4 and W-phase arm 3 6 respectively.
- the inverter 30 is connected to the DC voltage striving unit 1 0 by the on / off control (switching control) of the switching elements Q 2 1 to Q 2 6 in response to the switching control signals S 2 1 to S 2 6 from the control device 50.
- inverter 30 converts the DC voltage received from power line 7 into a three-phase AC voltage according to switching control by control device 50, and converts the converted three-phase AC voltage to motor generator MG. 2 can be output. As a result, the motor generator MG 2 is driven so as to generate the specified torque.
- the inverter 30 receives the rotational force from the wheels 15 50 during the regenerative braking of the vehicle.
- the three-phase AC voltage generated by MG 2 can be converted into a DC voltage according to switching control by control device 50, and the converted DC voltage can be output to power supply line 7.
- regenerative braking means braking with regenerative power generation when the driver operating the hybrid vehicle has a foot brake operation, or turning off the accelerator pedal while driving, although the foot brake is not operated. This includes decelerating (or stopping acceleration) the vehicle while regenerating power.
- Each of the motor generators MG 1 and MG 2 is provided with a current sensor 27 and a rotation angle sensor (resolver) 28. Since the instantaneous sum of the three-phase currents iu, iv, iw is zero, the current sensor 27 has two motor currents (for example, V-phase current i V and W-phase current iw) as shown in Fig. 1. It is sufficient to arrange it so as to detect.
- the rotation angle sensor 28 detects a rotation angle ⁇ of a rotor (not shown) of the motor generators MG 1 and MG 2 and sends the detected rotation angle ⁇ to the controller 50.
- Control device 50 can calculate the rotational speed Nmt (rotational angular velocity ⁇ ) of motor generators MG 1 and MG 2 based on rotational angle 0.
- the control device 50 can use the motor generator as a motor command.
- a control device 50 composed of an electronic control unit (ECU) includes a microcomputer (not shown), a RAM (Random Access Memory) 51, and a ROM (Read Only Memory) 52, and has a predetermined program.
- Switching control signal S 1 for switching control of buck-boost converter 15 and inverters 20 and 30 so that motor generators MG1 and MG2 operate according to the motor command input from the higher-level electronic control unit (ECU).
- S 2 buck-boost converter 15
- S 11 to S 16 inverter 20
- S 21 to S 26 inverter 30
- control device 50 is input with information on the traveling battery B, such as an input / output available power amount W i n, W u t that indicates a charge / discharge limit (SOC: State of Charge). '
- control device 50 functions to limit the power consumption and generated power (regenerative power) of the motor generators MG 1 and MG 2 as necessary so that the over-charge or over-discharge of the traveling battery B does not occur.
- an acceleration and deceleration / stop command for the hybrid vehicle 100 by the driver is input by operating the acceleration pedal 70 and the brake pedal 71.
- the operation (depression amount) of the accelerator pedal 70 and the brake pedal 71 by the driver is detected by an accelerator pedal depression amount sensor 73 and a brake pedal depression amount sensor 74.
- the accelerator pedal depression amount sensor 73 and the brake pedal depression amount sensor 74 output voltages corresponding to the depression amounts of the accelerator pedal 70 and the brake pedal 71 by the driver, respectively.
- Accelerator pedal depression sensor 73 and brake pedal depression sensor 74 The output signals ACC and BRK indicating the amount of stepping in are input to the control device 50. Note that the signals ACC and BRK input to the control device 50 are the same as the accelerator pedal 70 and the brake pedal 7 if only the detection of the stall condition where both the accelerator pedal 70 and the brake pedal 71 are operated is detected. Not only a signal indicating the respective stepping amount of 1 but also a flag signal indicating whether or not the driver has stepped on (whether or not the stepping amount is not zero).
- the controller 50 controls the command value VH ref of the system voltage VH according to the operating state of the motor generators MG 1 and MG 2 (hereinafter also simply referred to as voltage command value VH ref). Based on the voltage command value VH ref and the detected value of the system voltage VH by the voltage sensor 13, switching control is performed so that the output voltage of the buck-boost comparator 15 becomes equal to the voltage command value VH ref Generate signals S 1 and S 2.
- the step-up / down converter 15 is connected to the DC voltage VH obtained by boosting the DC voltage (battery voltage) V b supplied from the traveling battery B (this DC corresponding to the input voltage to the inverters 20 and ⁇ 30).
- the voltage is also referred to as “system voltage VH” below).
- the duty ratio ON period ratio of switching elements Q 1 and Q 2 that are alternately turned on and off is set. The step-up ratio depends on the duty ratio.
- the step-up / down converter 15 steps down the DC voltage (system voltage) supplied from the inverters 20 and 30 via the smoothing capacitor C O and charges the running battery B. More specifically, in response to the switching control signals S 1 and S 2 from the control device 50, a period in which only the switching element Q 1 is turned on, a period in which both the switching elements Q 1 and Q 2 are turned off, Are alternately provided, and the step-down ratio is in accordance with the duty ratio of the ON period.
- Smoothing capacitor CO smoothes the DC voltage (system voltage) from buck-boost converter 15 and supplies the smoothed DC voltage to inverters 20 and 30.
- the voltage sensor 13 detects the voltage across the smoothing capacitor CO, that is, the system voltage VH, and outputs the detected value to the control device 50.
- the inverter 3 ⁇ switches in response to the switching control signals S21 to S26 from the controller 50.
- Motor generator MG 2 is driven so that DC voltage supplied from smoothing capacitor CO is converted to AC voltage and positive torque is output by the on / off operation (switching operation) of elements Q21 to Q26.
- inverter 30 converts the DC voltage to AC by switching operation in response to switching control signals S21 to S26.
- the motor generator MG 2 is driven so that the torque is converted to zero and the torque becomes zero, so that the motor generator M G2 applies the zero or positive torque specified by the torque command value T qc om (2). It is driven so as to live.
- the torque command value of motor generator MG 2 is set to negative (Tq com (2) ⁇ 0).
- the inverter 30 converts the AC voltage generated by the motor generator MG 2 into a DC voltage by a switching operation in response to the switching control signals S 21 to S 26, and the converted DC voltage (system Voltage) is supplied to the step-up / down converter 15 via the smoothing capacitor CO.
- the inverter 30 controls the motor generator MG 2 according to the command value by the on / off control of the switching elements Q 21 to Q 26 according to the switching control signals S 21 to S 2-6 from the control device 50. Perform power conversion to operate.
- the inverter 20 controls the motor generator MG 1 by on / off control of the switching elements Q 1 1 to Q 16 according to the switching control signals S 11 to S 16 from the control device 50. Power conversion is performed so that it operates according to the command value.
- the control device 50 controls the motor generators MG 1 and MG 2 according to the torque command values Tq com (1) and (2), so that in the hybrid vehicle 100, the power consumption in the motor generator MG 2 is increased.
- Generation of vehicle driving force by Generation of driving battery B charging power or power consumption of motor generator MG 2 due to power generation by motor generator MG 1 and generation of charging power for driving battery B due to regenerative braking operation (power generation) at motor generator MG 2 Can be appropriately executed according to the driving state of the vehicle.
- FIG. 2 is a flowchart illustrating the setting of voltage command value VH r e ry of buck-boost converter 1.5 according to the first embodiment of the present invention. It is assumed that the program according to the flowchart shown in FIG. 2 is stored in the ROM 52 in the control device 50 and executed by the control device 50 at predetermined intervals. ,
- control device 50 performs torque command values Tq c om (1) and Tq c of motor generators MG 1 and MG 2 according to the vehicle state (vehicle speed, pedal operation, etc.) in step S 100.
- control device 50 calculates required voltage Vmg 1 in accordance with the induced voltage of motor generator MG1 according to the rotational speed of motor generator MG1 and torque command value Tq com (1).
- control device 50 compares required voltage Vmg 2 according to the induced voltage of motor generator MG 2 according to the rotational speed of motor generator MG 2 and the torque command value Tq c om (2). calculate.
- the counter electromotive force increases and the induced voltage increases as the rotational speed and Z or torque increase.
- the term “number of revolutions” refers to the number of revolutions per unit time (typically per minute).
- the required power is increased according to the torque and the number of rotations of the motor generator MG.
- the pressures Vmg 1 and Vmg 2 are set relatively high.
- the required voltages Vmg 1 and Vmg 2 are basically determined according to the output (rotation speed X torque) required for motor generator MG, and for the same rotation speed. As the output increases, the required voltages Vmg 1 and Vmg 2 are also set relatively high.
- the switching operation in each switching element of inverters 20 and 30 is set according to pulse width modulation control (PWM control).
- PWM control based on a voltage comparison between a predetermined carrier wave 200 and a voltage command wave 210, switching elements in each phase arm of the inverters 20 and 30 ON / OFF is controlled.
- the carrier wave 200 is generally a triangular wave or a sawtooth wave with a predetermined frequency
- the voltage command wave 210 is necessary for operating the motor generator MG according to the torque command value T qcom. Indicates the voltage (AC voltage) applied to the motor generator to generate each phase current.
- FIG. 5 shows a switching waveform of a switching element that is turned on when the voltage command wave is higher than the carrier wave and turned off when the voltage is opposite.
- the amplitude of the collector-emitter voltage V c e corresponds to the system voltage V H
- the collector-emitter current i c e is a current corresponding to the supply current to the motor generator MG. Therefore, at the same torque output, that is, under the same torque command value, the switching loss P 1 o s s increases as the system voltage VH increases.
- the voltage command value VHref is set as described below to suppress the temperature rise of the switching element of the inverter 30. To do.
- control device 50 determines in step S130 whether motor generator MG2 is locked.
- the locked state is, for example, when driving uphill, but the motor generator MG 2 is supplied with a current exceeding a certain level according to the torque command value Tq c om (2), but its rotation speed is extremely low (almost 0). It is in a state.
- motor generator MG2 determines whether or not a state in which the rotational speed is almost zero has occurred even though torque command value Tq c om (2) is equal to or greater than a predetermined value.
- the occurrence of the lock state can be detected.
- the occurrence of the mouth-opening state may be detected based on the integral value of the square of each phase motor current. That is, the specific method for detecting the lock state in step S 130 is not particularly limited.
- control device 50 obtains voltage command value VHr ef of step-up / down converter 15 in step S140. 1 Set to the maximum value of MG 1 required voltage Vmg 1 and MG2 required voltage Vmg 2 calculated in 10 and S120, respectively. As a result, the system voltage VH, which is the output voltage of the buck-boost comparator 15, can be set higher than the induced voltage of the motor generators MG 1 and MG 2 except when the locked state occurs. As a result, the control device 50 causes the inverters 20 and 30 to follow the torque command values Tq c om (1) and T qcom (2). Motor generators MG 1 and MG 2 can be driven and controlled.
- control device 50 sets voltage command value VHr e f of step-up / down converter 15 in steps S 150 and S 160 when a locked state is detected (YES in step S 130).
- control device 50 sets a limit voltage V 1 mt of system voltage VH.
- Limit voltage VI mt is equivalent to the output voltage (detection voltage Vb or rated output voltage) of battery B (DC power supply) for traveling.
- step S160 the controller 50 reduces the voltage command value VH ref between the limit voltage V 1 mt set in step S 150 and the maximum voltage of the required voltages Vmg 1 and Vmg 2. Set the voltage to the other side. That is, the voltage command value V Hr e f is set so as not to exceed the limit voltage V 1 mt, and the boosting in the buck-boost converter 15 is limited.
- inverters 20 and 30 when detecting the mouth state of motor generator MG 2, inverters 20 and 30 are reduced by setting system voltage VH low by setting voltage command value VHr ef. Switching loss P 1 oss in each switching element can be reduced. As a result, the temperature rise in the switching element in the specific phase where the current in the inverter 30 is concentrated can be suppressed. At this time, unlike the power loss reduction due to the lowering of the switching frequency, the controllability and the audible noise do not occur.
- the vehicle performance is improved in the hybrid vehicle that obtains the driving force by the motor generator MG 2.
- the temperature of the switching element is expected to increase gradually when the operating condition is severe. Since the tolerance can be designed to be low, the switching element can be reduced in size and cost.
- step S 1 30 in FIG. 2 corresponds to the “lock detection means” of the present invention
- steps S 1 5 0 and S 1 60 are the “voltage limiter” in the present invention.
- steps S 1 1 0, S 1 2 0, S 1 4 0 correspond to the “voltage setting means” in the present invention
- step S 1 2 0 is the “first setting means” in the present invention.
- Step S 1 10 corresponds to the “second setting means” of the present invention
- step S 1 4 0 corresponds to the “third setting means” of the present invention.
- the required torque is continuously output by the motor (motor generator MG 2) in the locked state by slowing the temperature rise of the switching element at the time of the occurrence of the hook state.
- the possible time ie, the time during which the locked state can be continued) can be secured longer.
- FIG. 6 is a flowchart illustrating a first example of voltage command value (VH ref) setting of buck-boost converter 15 according to the second embodiment of the present invention.
- the program according to the flowchart shown in FIG. 6 is also stored in the ROM 52 in the control device 50, and is determined by the control device 50 in the hybrid vehicle 100 shown in FIG. It shall be executed every period.
- the control device 50 performs step S 100 in the process of steps S 100 to S 1 60 shown in FIG.
- the control process in which 1 50 is replaced with step S 1 50 # is executed. Since the control processing other than step S 150 # is the same as in FIG. 2, detailed description thereof is omitted.
- the predetermined voltage V o can suppress the switching loss of the switching element in the inverter 30 that controls the motor generator MG 2 in the locked state to some extent, and enables the motor generator MG 1 to generate power. Is set in consideration.
- This predetermined voltage Vo! May be a fixed value, or may be a variable value according to the operating state of motor generator MG 1 (for example, the rotational speed and the torque or torque command value).
- control device 50 when detecting the locked state of motor generator MG 2, control device 50 reduces voltage command value VHr ef to limit voltage V l mt (Vb + Va) or less set as described above in step S 1 60. Set.
- VHr ef voltage command value
- Vb + Va limit voltage
- Vb + Va voltage command value
- the system voltage VH is set to a low value as in the case of the crane 1 to demonstrate the effect of suppressing the temperature rise of the switching element in the inverter 30, and the motor generator MG A predetermined amount of power generated by 1 can be secured.
- This makes it possible to secure the time during which the locked state can be continued, that is, the period during which the motor (motor generator MG 2) can continuously output the required torque, by utilizing the effect of suppressing the temperature rise of the switching element. It becomes possible.
- FIG. 7 is a flowchart illustrating a second example of voltage command value (V Hr ef) setting of buck-boost converter 15 according to the second embodiment of the present invention. Note that the program according to the flowchart shown in FIG. 7 is also stored in the ROM 52 in the control device 50, and is executed by the control device 50 in the hybrid vehicle 100 shown in FIG. It is assumed that it is executed every predetermined period.
- FIG. 7 is compared with FIG. 2.
- the control device 50 performs the steps in addition to the processing of steps S 100 to S 160 shown in FIG.
- a control process that further executes steps S170 and S180 is executed. Since the control processing in steps S 100 to S 160 is the same as that in FIG. 2, detailed description thereof is omitted.
- the motor generator MG 1 can be generated by the processing at steps S 170 and S 180 after limiting it to the same level as the battery voltage Vb.
- control device 50 increases the rotational speed of motor generator MG 1 by increasing the engine rotational speed.
- FIG. 8 is a collinear diagram illustrating the control operation in step S170.
- the relationship between the motor generators MG1, MG2 and the engine speed via the power split mechanism 120 is shown by a collinear diagram.
- motor generator MG 2 has a rotational speed of approximately 0 in the locked state, and the rotational speed of motor generator MG 1 depends on the engine rotational speed.
- the engine speed of the motor generator MG 1 is increased by increasing the engine speed by the processing in step S 170. As a result, the back electromotive force in motor generator MG 1 increases and the induced voltage is increased.
- control device 50 stops the operation of inverter 20 that drives and controls motor generator MG 1 in step S 180. That is, the switching elements Q11 to Q16 are turned off. In this state, high-efficiency power generation operation by inverter control cannot be executed by motor generator MG 1, but anti-parallel diodes D 1 1, D 13, and D 15 are connected due to an increase in the induced voltage of motor generator MG 1. Can form a current path that guides the back electromotive force of the motor generator MG 1 from the coil windings Ul, VI, W1 to the power supply line 7. it can. That is, the anti-parallel diodes D 11, D 13, and D 15 constitute the “rectifying element” in the present invention.
- Step S 1 5 0 # in FIG. 6 and steps S 1 70 and S 1 80 in FIG. 7 correspond to “power generation securing means” of the present invention.
- FIG. 9 is a flowchart illustrating control of hybrid vehicle 100 according to the third embodiment of the present invention. Note that the program according to the flowchart shown in FIG. 9 is also stored in the ROM 52 in the control device 50, and in the hybrid vehicle 100 shown in FIG. Shall be executed.
- the control device 50 needs to start the stopped engine 1 1 0 according to step S 1 90. Determine whether a request has been issued. If an engine start instruction has been issued (when YES is determined in step S 1 90), control device 50 prohibits engine start in step S 1 92.
- step S 1 5 0 or S 1 5 0 #
- step S 1 6 the system voltage VH becomes the limit voltage V Set the voltage command value VH ref of the buck-boost converter 15 so that lmt is not exceeded.
- control device 50 similarly performs steps S 1 5 0 (or S 1 5 0 #) and step S 1 6 0. Execute and set the voltage command value VH ref.
- the motor generator MG 1 operating as a “starting motor” can be driven by rotating the stopped engine 110 to output torque for starting the engine. It is necessary to generate the voltage VH.
- the system voltage VH needs to be raised, which may lead to a rise in temperature at each switching element of the inverter 30 that drives and controls the motor generator MG 2 in the closed state. There is. For this reason, by adopting the control configuration shown in FIG. 9, the system voltage VH is limited while prohibiting the engine start even when an engine start request is issued when a locked state is detected. Thus, when the locked state occurs while the engine is stopped, it is possible to reliably suppress the temperature rise of the switching element in inverter 30 that drives motor generator MG 2.
- FIG. 10 is a flowchart illustrating control of hybrid vehicle 100 according to the modification of the third embodiment of the present invention.
- the program according to the flowchart shown in FIG. 10 is also stored in the ROM 52 in the control device 50, and is executed at predetermined intervals by the control device 50 in the hybrid vehicle 100 shown in FIG. Shall be.
- the control device 50 is configured to perform step S in addition to the control process for setting the voltage command value shown in FIG. 1 YES when 3 0 is determined, that is, when the mouth-opening state is detected. Is executed further.
- the other control processes are the same as in FIG. 2, and thus detailed description thereof is omitted.
- control device 50 determines whether or not it is an engine start period from when an engine start request is issued until engine start is completed. For example, it is turned “ON” in response to the occurrence of an engine start request, and “OFF” in response to the number of revolutions of the engine 110 being increased above a predetermined number after the engine is started by the motor generator MG 1. By providing a flag, the determination in step S 1 95 can be executed according to the on / off state of the flag.
- the control device 5 0 executes step S 1 5 0 (or S 1 5 0 #) and step S 1 6 0 during the period other than the engine start period (when NO is determined in step S 1 95).
- control device 50 executes step S 1 4 0 to secure the necessary voltage Vmg 1 of motor generator MG 1. In the same way, set the voltage command value VH re ⁇ . As a result, generation of system voltage V H that allows drive control of motor generator MG 1 according to torque command value T q co m (1) required for engine start is permitted.
- the engine can be started even when the locked state occurs while the engine is stopped.
- the switching element in the inverter 30 that drives the motor generator MG 2 is used. It is possible to suppress the temperature rise of +
- the control according to the third embodiment for prohibiting engine start (FIG. 9) and the control according to the modification of the third embodiment for ensuring engine start (FIG. 10) are selectively performed depending on the nature of the engine start request. It is good also as a control structure to be performed to. For example, when the engine start request is issued due to the charging request from the traveling battery B, the control according to the modification of the third embodiment (FIG. 10) is performed in order to ensure the vehicle traveling performance thereafter. Preferably to ensure engine start. On the other hand, when an engine start request is issued due to an increase in the amount of accelerator operation by the driver, It is possible to adopt a control configuration in which the control according to the third embodiment (FIG. 9) is executed and engine start is prohibited, and an increase in driving force request is reflected in the torque command value of motor generator MG2.
- step S 1 92 in FIG. 9 corresponds to “starting limiting means” of the present invention
- step S 19.5 in FIG. Corresponds to “means”.
- the motor generator MG 1 also corresponds to the “starting motor” in the present invention.
- the present invention can also be implemented by separately providing a starting motor for starting the engine that receives power supply from the power line 7. The fact that the vehicle control according to Form 3 and its modifications can be applied will be described.
- Figure 11 is a flow chart explaining vehicle control according to Embodiment 4 of the present invention.
- control device 50 in step S 2 0 0, generates a lock 'state in motor generator MG 2 by the same process as in step S 1 30 shown in FIG. Determine whether or not.
- control device 50 further executes step S 2 1 0 to detect whether or not a stall state has occurred.
- the determination of step S 2 10 is performed based on signal A CC and signal B RK (FIG. 1).
- the control device 50 detects the stall state when the depression amount is not 0 in both the accelerator pedal 70 and the brake pedal 71.
- step S 2 20 when step S 2 0 0 or step S 2 1 0 is NO, that is, when no clogged state occurs or when a stalled state does not occur even when a locked state occurs
- step S 2 20 normal torque and rotation speed are set for motor generators MG 1 and MG 2.
- the vehicle Motor generator torque command values Tq com (1) and Tq com (2) are generated according to the state, and the rotational speeds of motor generators MG1 and MG2 are set.
- step S230 if a stall condition is detected (when YES is determined in step S200) when a lock state occurs (when YES is determined in step S210), control device 50 executes step S230.
- the torque and rotation speed of motor generators MG 1 and MG 2 are set within the limit area 260 (operation area where rotation speed ⁇ N 0 and torque ⁇ T 0) shown in Fig. 12.
- this restricted region 260 can control the motor generators MG 1 and MG 2 without being boosted by the buck-boost converter 15 (ie, required voltage Vmg 1, Vmg 2 ⁇ battery rated voltage). Set according to the area.
- the switching elements constituting the inverter can be protected, and the vehicle start performance can be improved because the start / start performance can be secured.
- the switching element can be designed to have a low temperature tolerance in anticipation of a gradual rise in temperature when the operating condition is severe and the locked state occurs at stall start. It is also possible to reduce the size and cost of the chucking element.
- the temperature rise of the switching element can be suppressed even if only the motor (motor generator MG 2) is configured to perform the operation region limitation according to the fourth embodiment. It is possible to achieve both the protection of the element by ensuring the stall start performance.
- step S 2 10 in FIG. 11 corresponds to the “stall detection means” of the present invention
- step S 2 30 corresponds to the “operation area limiting means” of the present invention. To do.
- Embodiments 1, 2, and 4 are rotating electric machines (electric motors) that are driven and controlled even for electric vehicles such as electric vehicles that are not equipped with an engine. It can be applied without limiting the number of generators or motor generators.
- the first and second embodiments are electric motor drive control systems including not only electric vehicles such as electric vehicles and hybrid vehicles but also a converter configured to be capable of boosting the output voltage of the DC power supply.
- the present invention can be applied without limiting the number of rotating electrical machines (electric motors, generators or motor generators) to be driven and the driving load by the rotating electrical machines (electric motors or motor generators).
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
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Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007800186564A CN101449457B (zh) | 2006-03-24 | 2007-03-16 | 电动机驱动控制系统及其控制方法 |
| CA2645623A CA2645623C (en) | 2006-03-24 | 2007-03-16 | Motor drive control system and method for controlling the same |
| EP07739572.1A EP2001124B1 (en) | 2006-03-24 | 2007-03-16 | Motor-driven control system |
| US12/224,848 US8040083B2 (en) | 2006-03-24 | 2007-03-16 | Motor drive control system and method for controlling the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006082683A JP4665809B2 (ja) | 2006-03-24 | 2006-03-24 | 電動機駆動制御システム |
| JP2006-082683 | 2006-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007111286A1 true WO2007111286A1 (ja) | 2007-10-04 |
Family
ID=38541203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/056132 Ceased WO2007111286A1 (ja) | 2006-03-24 | 2007-03-16 | 電動機駆動制御システムおよびその制御方法 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8040083B2 (ja) |
| EP (1) | EP2001124B1 (ja) |
| JP (1) | JP4665809B2 (ja) |
| KR (1) | KR101038753B1 (ja) |
| CN (1) | CN101449457B (ja) |
| CA (1) | CA2645623C (ja) |
| WO (1) | WO2007111286A1 (ja) |
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| JP2003309997A (ja) | 2002-04-16 | 2003-10-31 | Toyota Motor Corp | 電圧変換装置、電圧変換方法、電圧変換の制御をコンピュータに実行させるプログラムを記録したコンピュータ読取り可能な記録媒体 |
| JP2004064864A (ja) * | 2002-07-26 | 2004-02-26 | Toshiba Elevator Co Ltd | エレベータの制御装置 |
| JP2004274945A (ja) * | 2003-03-11 | 2004-09-30 | Toyota Motor Corp | モータ駆動装置、それを備えるハイブリッド車駆動装置、モータ駆動装置の制御をコンピュータに実行させるプログラムを記録したコンピュータ読取り可能な記録媒体 |
| JP2005117758A (ja) | 2003-10-06 | 2005-04-28 | Nissan Motor Co Ltd | モーター駆動制御装置 |
| JP2005253151A (ja) * | 2004-03-02 | 2005-09-15 | Fuji Heavy Ind Ltd | ハイブリッド車両の制御装置 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7997364B2 (en) | 2008-02-26 | 2011-08-16 | Toyota Jidosha Kabushiki Kaisha | Hybrid vehicle and control method of hybrid vehicle |
| JP2011003278A (ja) * | 2009-06-16 | 2011-01-06 | Toyota Motor Corp | 燃料電池システム |
| US8594874B2 (en) | 2009-06-16 | 2013-11-26 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2001124A9 (en) | 2009-03-25 |
| EP2001124B1 (en) | 2020-09-30 |
| KR20080108136A (ko) | 2008-12-11 |
| CN101449457A (zh) | 2009-06-03 |
| EP2001124A4 (en) | 2017-07-12 |
| US20090021198A1 (en) | 2009-01-22 |
| CN101449457B (zh) | 2012-05-02 |
| EP2001124A2 (en) | 2008-12-10 |
| CA2645623A1 (en) | 2007-10-04 |
| JP4665809B2 (ja) | 2011-04-06 |
| JP2007259631A (ja) | 2007-10-04 |
| KR101038753B1 (ko) | 2011-06-03 |
| CA2645623C (en) | 2013-01-08 |
| US8040083B2 (en) | 2011-10-18 |
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