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EP4000169A1 - Procédé et système présentant un circuit intermédiaire à tension continue assisté par l'intermédiaire d'un convertisseur cc/cc à partir d'un accumulateur d'énergie et un bloc d'alimentation - Google Patents

Procédé et système présentant un circuit intermédiaire à tension continue assisté par l'intermédiaire d'un convertisseur cc/cc à partir d'un accumulateur d'énergie et un bloc d'alimentation

Info

Publication number
EP4000169A1
EP4000169A1 EP20735267.5A EP20735267A EP4000169A1 EP 4000169 A1 EP4000169 A1 EP 4000169A1 EP 20735267 A EP20735267 A EP 20735267A EP 4000169 A1 EP4000169 A1 EP 4000169A1
Authority
EP
European Patent Office
Prior art keywords
voltage
converter
side connection
connection
power
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.)
Pending
Application number
EP20735267.5A
Other languages
German (de)
English (en)
Inventor
Nikolas MORVAN
Wolfgang Halder
Thomas Kühefuss
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.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4000169A1 publication Critical patent/EP4000169A1/fr
Pending legal-status Critical Current

Links

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
    • H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
    • H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
    • H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
    • H02M5/453—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0096—Means for increasing hold-up time, i.e. the duration of time that a converter's output will remain within regulated limits following a loss of input power
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock

Definitions

  • the invention relates to a method and a system with a DC voltage intermediate circuit supported by a DC / DC converter from an energy store and a power supply unit.
  • the invention is therefore based on the object of making a system as safe as possible.
  • the object is achieved in the method according to the features specified in claim 1 or 2 and in the system according to the features specified in claim 12.
  • the DC / DC converter being operated in such a way that the DC / DC converter at its first connection is in a first operating state, in particular and when the AC voltage supply network is operational, provides a first voltage
  • Operating state in particular and when a power failure is detected, i.e. failure of the AC voltage supply network, provides a second voltage, the first voltage being greater than a minimum voltage, wherein the second voltage is lower than the minimum voltage, in particular wherein one supplied from the first connection of the DC / DC converter
  • Inverter is switched off when the connection is present at this first connection
  • Voltage is less than the minimum voltage.
  • Signal electronics areas of the modules can be kept ready for operation. This increases security, since the monitoring and security functions carried out by the respective signal electronics areas are ready for operation for as long as possible.
  • Supply module is electrically connected in parallel to the DC voltage side connection of the inverter and to the first connection of the DC / DC converter, to the second connection of which the energy store is connected, the AC voltage side connection of the rectifier from one
  • AC voltage supply network is fed, with a low voltage, in particular 24 volts, being fed to the supply module, the DC / DC converter and the inverter from a first DC voltage side connection of the power supply unit, with an AC voltage side connection of the power supply unit from
  • AC voltage supply network is fed, with a second DC voltage side connection of the power supply parallel to
  • the DC voltage-side connection of the supply module is switched, wherein in a first operating state, in particular and when the AC voltage supply network is ready for operation, the DC / DC converter provides a first voltage at its first connection, with the DC / DC converter in a second operating state, in particular and when a network failure is detected, i.e. failure of the AC voltage supply network provides a second voltage at its first connection, the first voltage being greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, the inverter being switched off when the voltage applied to its DC-side connection is lower than the minimum voltage.
  • Signal electronics areas of the modules can be kept ready for operation. This increases safety, since the monitoring and safety functions carried out by the respective signal electronics areas are ready for operation for as long as possible.
  • sensors for power failure detection are in the
  • the advantage here is that the information about the
  • Data bus connection to the bus subscribers connected for data exchange can be reported, in particular also to the DC / DC converter, which then sets the operating state as a function of the information. It is therefore important that the measurement technology for detecting the power failure is located in a different device than in the DC / DC converter. This measurement technology is otherwise required for the function and mode of operation of the supply module, since it has a DC / DC converter arranged on the DC / DC connection of the rectifier of the supply module, so that the power flow from the rectifier into the intermediate circuit can be controlled.
  • one is used to discharge the energy store
  • Resistance R in particular braking resistance, electrical power P constant over time is supplied permanently, in particular during a period of time T, in particular until the resistor is practically completely discharged, in particular with the period of time T being greater than the time constant of the constant electrical power supplied to the resistor
  • the advantage here is that power is not only applied to the resistor for a short time in order to lower the intermediate circuit voltage, but that the greatest possible power P is applied permanently. This power is preferably so great that the
  • the voltage U present at a series circuit formed from the resistor and a controllable semiconductor switch, in particular a brake chopper, is detected, the series circuit being either fed directly from the voltage made available by the energy store or via a DC / DC Converter from the vom
  • the controllable semiconductor switch being supplied with a pulse-width-modulated control signal with a pulse-width modulation ratio that is dependent on the value of the detected voltage, in particular wherein the pulse-width modulation ratio is determined according to (1 / U) * (P * R) L 1 is.
  • Pulse width modulation ratio is changed, in particular is increased when the voltage drops.
  • the controllable half-liter switch is permanently closed when the voltage U falls below a threshold value, in particular the threshold value (P * R) being L 1. This enables particularly fast deep discharge when the maximum power that can be fed to the resistor is in the permissible range.
  • Pulse width modulation is then avoided.
  • the system has a supply module comprising a mains-fed rectifier, the DC voltage side connection of which is connected to the DC voltage side connection of an inverter and to the first connection of a DC / DC converter, the second connection of the DC / DC converter to the the connection of the energy store providing the voltage U is connected, an electric motor, in particular a three-phase motor, being connected to the connection on the AC voltage side of the inverter.
  • a supply module comprising a mains-fed rectifier, the DC voltage side connection of which is connected to the DC voltage side connection of an inverter and to the first connection of a DC / DC converter, the second connection of the DC / DC converter to the connection of the energy store providing the voltage U is connected, an electric motor, in particular a three-phase motor, being connected to the connection on the AC voltage side of the inverter.
  • a DC / DC converter is arranged between the DC voltage side connection of the rectifier and the DC voltage side connection of the supply module, which regulates the power flow from the rectifier to the resistor R and the controllable
  • Rectifier and the controllable half liter switch are arranged integrated when
  • Discharge heat is generated either by the controllable semiconductor switch or alternatively by the diodes of the rectifier.
  • the advantage here is that the power flow from the AC voltage supply network to the intermediate circuit can be interrupted. This is particularly important when unloading.
  • the inverter has a power module on which controllable semiconductor switches arranged in half bridges are arranged.
  • the advantage here is that the controllable half-liter switches can be designed as circuit breakers and are nevertheless structurally integrated, that is, can be arranged on a common carrier.
  • the power P is less than the maximum from
  • the pulse width modulation frequency is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoe
  • Time span T changed, in particular as pulse width modulation frequency different in particular discrete values can be used in chronological succession.
  • the advantage here is that the
  • Noise emission can be reduced or at least no monofrequency sound can be heard, but the sound energy can be divided into different frequencies. The sound impression is therefore more acceptable.
  • the current I flowing through the resistor R is detected, the current resistance value of the braking resistor being determined from the time-averaged voltage provided via the brake chopper and the time-averaged current, in particular according to U / 1, and below Consideration of a characteristic curve which shows the temperature dependence of the
  • Braking resistor represents the current temperature T of the respective braking resistor is determined.
  • the advantage here is that the temperature can be determined from the specific voltage and the specific current. In an advantageous embodiment, it is monitored whether the specific temperature T of the braking resistor exceeds a threshold value, in particular wherein an emergency shutdown of the brake chopper is carried out when it is exceeded.
  • a threshold value in particular wherein an emergency shutdown of the brake chopper is carried out when it is exceeded.
  • the specific temperature is regulated to a setpoint temperature in that the power P is set accordingly as the control value of a controller, in particular a PI controller.
  • Ambient temperature maximum power can be dissipated from the energy storage device to the environment.
  • the system is designed with a supply module, an inverter, a DC / DC converter, an energy store and a power supply unit, the DC voltage-side connection of the rectifier having
  • Supply module is electrically connected in parallel to the DC voltage side connection of the inverter and to the first connection of the DC / DC converter, to the second connection of which the energy store is connected, the AC voltage side connection of the rectifier from one
  • AC voltage supply network is fed, with a low voltage, in particular 24 volts, being fed to the supply module, the DC / DC converter and the inverter from a first DC voltage side connection of the power supply unit, with an AC voltage side connection of the power supply unit from
  • a second DC voltage-side connection of the power supply unit is connected in parallel to the DC-voltage side connection of the supply module, in particular so that the power supply unit can be supplied from the AC voltage supply network and / or via the DC / DC converter from the energy store, the DC / DC converter being so suitable It is designed that the DC / DC converter provides a first voltage at its first connection in a first operating state, in particular and when the AC voltage supply network is ready for operation, and the DC / DC converter in a second operating state, in particular and when a power failure is detected of the AC voltage supply network, provides a second voltage at its first connection, the first voltage being greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, in particular the inverter being designed in such a way that the
  • Inverter is switched off when the voltage applied to its DC voltage-side connection is less than the minimum voltage.
  • sensors for power failure detection are in the
  • the advantage here is that the information about the power failure can be recognized directly on the AC voltage supply network and is medium
  • Data bus connection to the bus subscribers connected for data exchange can be reported, in particular also to the DC / DC converter, which then sets the operating state as a function of the information. It is therefore important that the measurement technology for detecting the power failure is located in a different device than in the DC / DC converter. This measurement technology is otherwise used for the function and operation of the supply module is required, since this has a DC / DC converter arranged on the DC voltage side connection of the rectifier of the supply module, so that the power flow from the rectifier into the intermediate circuit can be controlled.
  • the system has a supply module comprising a mains-fed rectifier, the DC-side connection of which is connected to the DC-side connection of an inverter of the system and to the first DC-side connection of a DC / DC converter of the system, the second DC-side connection being the DC / DC converter with the
  • Energy storage in particular accumulator arrangement and / or
  • Double-layer capacitor arrangement and / or ultracap arrangement is connected, wherein an electric motor, in particular three-phase motor, is connected to the AC voltage side connection of the inverter.
  • the energy storage can be discharged. This discharge can be carried out quickly because a very low ohmic resistance value can be used. This is because, by detecting the voltage applied to the series circuit, a constant power can be dissipated to the resistor by means of an appropriately suitable pulse width modulation, and rapid discharge can also be carried out at low voltages.
  • a DC / DC converter is arranged between the DC voltage side connection of the rectifier and the DC voltage side connection of the supply module.
  • a controllable semiconductor switch connected in series with the braking resistor is arranged in the housing of the DC / DC converter.
  • the advantage here is that the controllable semiconductor switch can be designed to be integrated with the other electronics of the DC / DC converter and can then also be used for heat dissipation.
  • a controllable semiconductor switch connected in series with the braking resistor is integrated on a power module which has diodes and / or controllable semiconductor switches arranged in half bridges.
  • the rectifier is integrated with the controllable semiconductor switch and designed to be heat-dissipated together.
  • the power module is arranged in the housing of the inverter or of the supply module.
  • Semiconductor switch can be arranged integrated in the power module and thus the cooling of the controllable power module can be carried out with the cooling of the power module, in particular by means of a heat sink, which dissipates the heat loss of the controllable semiconductor switches of the inverter arranged in half bridges and the controllable semiconductor switch assigned to the resistor to the environment.
  • FIG. 1 A system according to the invention is shown schematically in FIG. 1
  • a supply module 1 fed by an AC voltage supply network 8 provides a unipolar voltage at its connection on the DC voltage side.
  • the DC voltage-side connection of an inverter 2 is connected to this connection, with a three-phase voltage from an electric motor 4, in particular from an electric motor 4, from the inverter 2 at the AC voltage-side connection of the inverter 2
  • AC motor in particular three-phase motor, is made available.
  • the inverter is controlled by control electronics 3.
  • the control electronics 3 generate pulse-width-modulated control signals for the controllable semiconductor switches of the inverter, which are arranged in half-bridges connected in parallel to one another, this parallel connection of half-bridges being able to be fed from the unipolar voltage.
  • these semiconductor switches are integrated on a module on which a further controllable semiconductor switch is also integrated, which can be referred to as a brake chopper.
  • the brake chopper is connected in series with a resistor which can be referred to as a braking resistor (7, 12), this series connection also being able to be fed from the unipolar voltage.
  • a connection of a DC / DC converter 5 is also connected to the connection on the DC voltage side of the supply module 1, so that this DC / DC converter 5 is connected in parallel to the inverter 2.
  • An energy store 6 is connected to the other connection of the DC / DC converter 5.
  • the DC / DC converter 5 thus enables a power flow from the energy store 6 to the intermediate circuit having unipolar voltage or vice versa, even if the amount of the unipolar voltage is very different from the amount of the voltage applied to the energy store 6.
  • the energy store 6 is as an electrolytic capacitor arrangement
  • Double-layer capacitor arrangement and / or preferably designed as a storage battery arrangement are identical to Double-layer capacitor arrangement and / or preferably designed as a storage battery arrangement.
  • the supply module 1 can be implemented as a mains-fed rectifier. However, a DC / DC converter is preferably arranged between the mains-fed rectifier and the DC voltage-side connection of the supply module 1, so that the power flow from the AC voltage supply network 8 into the intermediate circuit can be controlled.
  • the rectifier in turn preferably has a module on which the diodes of the rectifier are integrated and on which a further controllable semiconductor switch is also integrated, which can be referred to as a brake chopper.
  • the brake chopper is connected in series with a further resistor 13, which can be referred to as a braking resistor, this series connection also being able to be fed from the DC voltage-side connection of the rectifier.
  • the DC / DC converter 5 also includes a further controllable semiconductor switch that is integrated, which can be referred to as a brake chopper.
  • This brake chopper is connected in series with a further resistor 7, which can be referred to as a braking resistor, this series connection also being able to be fed from the DC voltage-side connection of the rectifier or from the voltage applied to the energy store 6.
  • the security of the system is increased by a discharge of the
  • Energy storage is controlled executable. This is important not only when the energy store 6 is being transported, but also when the system is being serviced when the energy store is to be discharged. Discharging is also important for special types of energy storage if a memory effect is to be prevented. For example, NiCd batteries are regularly discharged over time.
  • Discharging takes place in such a way that the brake chopper of the respective braking resistor (7, 12, 13) is controlled depending on the unipolar voltage or on the voltage U applied to the series circuit formed by the braking resistor and the associated brake chopper in such a way that the respective braking resistor R a constant power is continuously supplied.
  • This electrical power P supplied to the respective braking resistor permanently until the energy store is practically completely discharged is specified as high as possible. It is therefore preferably the same as the rated power of the braking resistor R.
  • the voltage U is recorded and the respective brake chopper is preferably controlled with a pulse width modulation ratio (1 / U) * (P * R) L 1.
  • the power supplied to the respective braking resistor remains constant even when the voltage U drops.
  • the nominal power that is to say also the power P, is less than that in the generator operation of the electric motor from the electric motor 4 via the inverter 2
  • the ohmic resistance of the respective braking resistor R can therefore be selected to be very small and therefore a practically complete discharge can be achieved in a short time.
  • the pulse width modulation can even be replaced by permanently closing the controllable switch. In this way, a particularly fast total discharge is made possible. As soon as the voltage falls below a second, even smaller threshold value, the switch is then opened again in order to protect the battery cells against destruction. In the manner described, energy from the intermediate circuit is via the
  • Braking resistors (7, 12, 13) convertible into heat.
  • Minimum voltage no discharge through the braking resistors 12 and 13 can be carried out.
  • the supply module 1 When the energy store 6 is discharged, the supply module 1 does not conduct any electrical power from the AC voltage supply network to the intermediate circuit.
  • a power supply 9 that on the one hand consists of the
  • AC voltage supply network 8 can also be supplied from the other hand
  • Intermediate circuit can be supplied, i.e. from a DC voltage. A supply is thus still available even in the event of a power failure, since energy can still be supplied to the intermediate circuit from the energy store 6 via the DC / DC converter 5.
  • the power supply 9 is within a period of time after the occurrence of the power failure
  • Low voltage in particular 24 volts, can be provided.
  • the time span is limited, however, by the energy which is present in the storage device 6 and, if necessary, by further power sinks arranged on the intermediate circuit.
  • Signal electronics area can be supplied by components of the system, such as part of the signal electronics of the supply module 1, part of the signal electronics of the DC / DC converter 5, the signal electronics 3 of the inverter 2, a higher-level controller 10 and other consumers that can be fed by the low voltage .
  • Energy store 6 provided voltage to the first required in the intermediate circuit Voltage, i.e. nominal intermediate circuit voltage, up or down if necessary. This first voltage is greater than a minimum voltage, in particular 400 volts.
  • the inverter 2 is switched off below the minimum voltage.
  • sensors are attached to the supply module 1, in particular means for detecting the phase voltages of the three-phase network
  • the signal electronics of the supply module 1 also functions as an evaluation unit for the signals from these sensors arranged on the supply module 1 on the network side. As soon as a power failure is detected, corresponding information is reported to the other bus participants via the data bus
  • the DC / DC converter 5 continues to provide the
  • the intermediate circuit nominal voltage is available to the intermediate circuit until the inverter 2 is in a safe state, in particular that supplied by the inverter 2
  • Electric motor 4 is braked.
  • the DC / DC converter 5 After receiving the information about the attainment of the safe state, the DC / DC converter 5 only provides a second voltage to the intermediate circuit, which is smaller than that
  • Minimum voltage is.
  • the second voltage is slightly more than 24 volts, so that 24 volts can be made available by the power pack.
  • the power consumed by the system is preferably determined by signal electronics of the DC / DC converter 5 from the current flowing from the DC / DC converter 5 into the intermediate circuit and the voltage detected at the intermediate circuit, and from this, taking into account the charging energy currently available in the memory 6 the respective remaining runtime is determined, the remaining runtime being the time in which the power supply unit is still able to provide the second voltage to the intermediate circuit.
  • no DC / DC converter 5 is provided, but the energy store 6 is connected directly to the intermediate circuit.
  • the energy store 6 is made available as completely as possible to the power supply unit 9, so that the low voltage can be provided by the power supply unit 9 for as long as possible.
  • the current flowing through the respective braking resistor is detected and from that via the braking chopper
  • time-averaged voltage as well as the recorded and time-averaged current determines the current resistance value of the braking resistor and below
  • the surrounding heat transfer resistance can be taken into account.
  • Pulse width modulation frequency used, but the pulse width modulation frequency is changed over time or continuously. In this way, less disruptive noise emission can be brought about.
  • I I bus subscribers especially consumers 12 braking resistor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un procédé et un système permettant de faire fonctionner un système présentant un accumulateur d'énergie et une résistance. Pour décharger l'accumulateur d'énergie, une puissance électrique P constante dans le temps est amenée de manière permanente à la résistance R, en particulier pendant un laps de temps T, en particulier jusqu'à la décharge quasiment totale de la résistance, en particulier le laps de temps T étant supérieur à la constante de temps de l'augmentation de température de la résistance R provoquée par une puissance permanente électrique, constante dans le temps, amenée à la résistance.
EP20735267.5A 2019-07-18 2020-06-25 Procédé et système présentant un circuit intermédiaire à tension continue assisté par l'intermédiaire d'un convertisseur cc/cc à partir d'un accumulateur d'énergie et un bloc d'alimentation Pending EP4000169A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019004981 2019-07-18
PCT/EP2020/025300 WO2021008726A1 (fr) 2019-07-18 2020-06-25 Procédé et système présentant un circuit intermédiaire à tension continue assisté par l'intermédiaire d'un convertisseur cc/cc à partir d'un accumulateur d'énergie et un bloc d'alimentation

Publications (1)

Publication Number Publication Date
EP4000169A1 true EP4000169A1 (fr) 2022-05-25

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Country Status (3)

Country Link
EP (1) EP4000169A1 (fr)
DE (2) DE102020003802A1 (fr)
WO (1) WO2021008726A1 (fr)

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DE102022205912A1 (de) * 2022-06-10 2023-12-21 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren und Vorrichtung zum Betreiben einer Leistungselektronik, Leistungselektronik
DE102023003188A1 (de) 2022-09-20 2024-03-21 Sew-Eurodrive Gmbh & Co Kg Anlage mit als Elektrogeräte ausgeführten Busteilnehmern und Verfahren zum Betreiben einer Anlage

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DE102012017851A1 (de) * 2012-06-18 2013-12-19 Robert Bosch Gmbh Schaltungsanordnung
EP2684732A1 (fr) * 2012-07-09 2014-01-15 ABB Oy Système électrique possédant un circuit intermédiaire à courant continu

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WO2021008726A1 (fr) 2021-01-21
DE102020007982A1 (de) 2021-03-11

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