EP3610565A1 - Détection de court-circuit dans des modules demi-pont parallèles - Google Patents

Détection de court-circuit dans des modules demi-pont parallèles

Info

Publication number
EP3610565A1
EP3610565A1 EP18717384.4A EP18717384A EP3610565A1 EP 3610565 A1 EP3610565 A1 EP 3610565A1 EP 18717384 A EP18717384 A EP 18717384A EP 3610565 A1 EP3610565 A1 EP 3610565A1
Authority
EP
European Patent Office
Prior art keywords
output
differential current
converter device
current signal
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP18717384.4A
Other languages
German (de)
English (en)
Inventor
Felix TRAUB
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of EP3610565A1 publication Critical patent/EP3610565A1/fr
Ceased 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/38—Means for preventing simultaneous conduction of switches
    • 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
    • H02M1/0009—Devices or circuits for detecting current in a converter

Definitions

  • the invention relates to the field of short circuit detection in electrical converters.
  • the invention relates to a converter device and a method for detecting a short circuit in such a device.
  • a DC link short circuit may be detected by de- saturation detection, i.e., the collector-emitter voltage may be measured to detect high voltages during on-state, indicating an excessive collector current leading to de-saturation of the IGBT.
  • de- saturation detection i.e., the collector-emitter voltage may be measured to detect high voltages during on-state, indicating an excessive collector current leading to de-saturation of the IGBT.
  • the main disadvantages of the de-saturation detection may be a complex implementation to measure a high-voltage signal, requiring large space due to isolation distances, and long detection times for short circuit events due to blanking times after IGBT turn-on.
  • Another solution to detect short circuit events is by means of sensing a time variation dl/dt of a current I through the power module.
  • a Rogowski coil may be used to detect a dl/dt in a power module terminal.
  • a parasitic emitter inductance of the IGBT may be used to detect the time variation dl/dt of the current.
  • the converter device may be a power converter device adapted for converting currents of more than 10 A and/or more than 100 V.
  • the converter device comprises at least two half-bridge modules, each half-bridge module comprising two semiconductor switches connected in series between a DC+ output and a DC- output and providing an AC output between them.
  • a half-bridge module may be a power module, which houses the two semiconductor switches and may provide terminals for electrically interconnecting the module with further devices, such as further power modules.
  • a semiconductor switch may comprise a transistor or thyristor connected in parallel with a free-wheeling diode.
  • the semiconductor switch may comprise an IGBT, IGCT, etc.
  • the half-bridge modules are connected in parallel with each other, such that the DC+ outputs are connected with each other, the DC- outputs are connected with each other and the AC outputs are connected with each other.
  • the half- bridge modules may form a half-bridge of paralleled semiconductor switches that may be adapted for switching a higher current than one half-bridge module alone.
  • at least one of the half-bridge modules may comprise a current sensor adapted for detecting a differential current signal of a differential current between the DC+ output and the DC- output, the differential current being a difference between a current into the DC+ output and a current out of the DC- output.
  • the differential current signal may be indicative of the differential current.
  • the current into the converter device and out of the converter device is substantially equally distributed between the half-bridge modules.
  • the differential current in the DC terminals of every half-bridge module is substantially the current through the AC terminal.
  • the differential current I develops a rather high dl/dt, i.e. the time variations of the differential current become substantially higher than during normal operation.
  • the high frequency components of the differential current becomes high.
  • the half-bridge module with the short circuited semiconductor switch may experience the full short circuit current N*Isc in the DC output connected to the short circuited semiconductor switch and the per-module short circuit current Isc on the opposite DC terminal.
  • the working half-bridge modules see the per-module short circuit current Isc on one terminal and no current on the opposite DC terminal.
  • all half-bridge modules experience a differential current in the DC terminals different from 0.
  • a signal proportional to the differential current t may be high-pass filtered or a signal proportional to the time variations d/dt may be integrated with an integrator having a cut-off frequency below the switching frequency of the half-bridge modules.
  • the generated sensor signal may be used to detect a short circuit event in the converter device.
  • the current sensor may be adapted for detecting that there is a difference in the current flowing through the DC+ output and the current flowing through the DC- output.
  • the current sensor may comprise two individual sensors adapted for measuring a current in the DC+ output and the DC- output providing two current signals that are subtracted from each other.
  • the current sensor is adapted for directly providing the differential current signal as described below.
  • measurements of the current sensor may be performed in the DC+ output and the DC- output.
  • the current sensor may comprise detection means for detecting currents and/or a differential current in the DC+ output and the DC- output.
  • the current sensor may generated the differential current signal based on the current through the DC+ output and the DC- output.
  • a differential current signal may be a voltage signal provided by the current sensor that may be in relation and/or proportional to the differential current.
  • only one half-bridge module comprises a current sensor adapted for detecting a differential current signal of a differential current between the DC+ output and the DC- output of the half-bridge module.
  • At least two of the half-bridge modules comprise a current sensor adapted for detecting a differential current signal of a differential current between the DC+ output and the DC- output of the respective half-bridge module.
  • a current sensor adapted for detecting a differential current signal of a differential current between the DC+ output and the DC- output of the respective half-bridge module.
  • the differential current sensor is based and/or is adapted for detecting a varying magnetic field generated by the current in the DC+ output and the DC- output.
  • the current sensor may be based on a dl/dt sensor, i.e. a sensor adapted for determining the time derivative of the differential current. This may be achieved by measuring time variations of a magnetic field generated by the currents through the DC+ output and the DC- output.
  • the DC+ output and the DC- output may have conductors that are arranged antiparallel to each other with respect to a current flow through them.
  • the conductors when the currents through the conductors vary, the conductors generate a varying magnetic field around them, indicative of time derivate of the sum of the currents (wherein these currents have a sign with respect to a direction parallel to the conductors).
  • Such a magnetic field may be transferred into a voltage signal induced in a coil.
  • the current sensor comprises a Rogowski coil surrounding at least one conductor of the DC+ output and at least conductor of the DC- output, in which Rogowski coil the differential current signal is induced.
  • the Rogowski coil may be wound around both DC terminals of the half-bridge power module. Compared to existing implementation of Rogowski coils wound around a single DC terminal, creepage and clearance constraints can easily be fulfilled because the Rogowski coil can be placed at arbitrary distance from the DC terminals conductors.
  • the Rogowski coil may be integrated in an existing PCB (such as the gate adapter board). However, it may also be realized as a separate component.
  • the current sensor comprises a pick-up coil arrangement partially surrounding a conductor of the DC+ output and a conductor of the DC- output.
  • the pick-up coil arrangement may comprise one or more coils arranged besides the conductors. In the case of more than one coil, the coils may be connected in series with each other.
  • a pick-up coil may be designed like a Rogowski coil, which, however, does not form a closed loop but surrounds the two conductors only partially.
  • a number of conductor loops of the one or more coils are selected, such that the differential current signal is induced in the pick-up coil arrangement.
  • the coils may be arranged at positions around the two DC terminals, at which differently strong magnetic fields from the different conductors are present.
  • the sensitivity of the coils may be tuned with their number of turns, such that the effect of differently strong fields is mitigated.
  • the time variation or time derivative dl/dt of the differential current I may be detected by a pick-up coil arrangement, which is tuned in such a way that it detects non-zero net dl/dt in the pair of conductors, whereas it may be insensitive to a zero differential current such as during commutation events.
  • the pick-up coil arrangement may have two extension sections running along opposite sides of the conductors, the two extension sections having conductor loops wound in the same direction with respect to a direction around the conductors.
  • the pick-up coil arrangement may have an intermediate extension section arranged between the two opposite extension sections.
  • the pick-up coil arrangement comprises at least two coils with conductor loops wound in opposite directions with respect to a direction around the conductors of the DC+ and the DC- output. In such a way, the pick-up coil arrangement may be placed much nearer to one of the conductors than to the other.
  • the one or more coils are provided by a printed circuit board (PCB).
  • This printed circuit board may be a separate device and/or may carry further circuitry.
  • the pick-up coil arrangement may be integrated into a gate driver circuit board of the respective half-bridge module.
  • the current sensor comprises a ring of magnetic material surrounding a conductor of the DC+ output and a conductor of the DC- output.
  • the current sensor furthermore may comprise a coil surrounding the ring, such that the differential current signal is induced in the coil.
  • Such a current sensor may be seen as a differential current transformer on the conductors.
  • the differential current transformer may be realized by placing magnetic material around both DC terminals and using a sensing wire to measure the magnetic field.
  • the core of magnetic material only may pick up magnetic fields due to differential currents in the pair of DC terminals.
  • the increase of stray inductance may be very small.
  • the at least one half-bridge module comprises a DC+ terminal and a DC- terminal interconnected with the DC+ output and the DC- output, wherein the DC+ terminal and the DC- terminal are together at least partially surrounded by the differential current sensor.
  • the DC terminals may provide the conductors used for determining the differential current.
  • the DC terminals may protrude side by side from the half-bridge module.
  • the current sensor may be an additional device placed on the half-bridge module around the DC terminals.
  • the current sensor may be provided on a PCB (printed circuit board).
  • the current sensor is integrated into the half-bridge module, for example inside a housing of the half-bridge module.
  • the converter device comprises a controller adapted for receiving the at least one differential current signal and for determining from the differential current signal, whether the converter device has a short circuit.
  • the controller may be integrated into one half-bridge module or may be a separate device.
  • the controller also may provide the gate signals for the semiconductor switches.
  • a further aspect of the invention relates to a method for detecting a short circuit in a converter device, such as described in the above and in the following.
  • the method may be performed by the controller mentioned above.
  • the method may be implemented in software or at least partially in hardware. It has to be understood that features of the method as described in the above and in the following may be features of the controller or converter device as described in the above and in the following, and vice versa.
  • the method is a fast and low-cost method to detect short circuit events in an electrical converter, which is composed of converter devices with paralleled half-bridge modules.
  • the method uses the fact that a short circuit event is usually due to the failure of a single chip, leading to a current distribution which is strongly different from the well-balanced current distribution during normal operation.
  • the method comprises: receiving at least one differential current signal from a differential current sensor of a half-bridge of the converter device; comparing the at least one differential current signal with a threshold; and determining that the converter device has a short circuit, when the differential current signal is higher than the threshold.
  • the threshold may be set higher than an average commutation current, since the short circuit current and also the differential current may be substantially higher than the commutation current.
  • the differential current may be at least 1/N times the short circuit current, where N is the number of paralleled half-bridge modules.
  • the detected short-circuit may be a short-circuit of the DC+ output and DC- output and/or of a DC link connected to the converter device.
  • the differential current signal is not directly compared with the threshold, but is processed before it is compared with the threshold.
  • processing may include integrating or high-pass filtering.
  • the method comprises: receiving at least one differential current signal from a differential current sensor of a half-bridge of the converter device; processing the differential current signal; comparing the processed differential current signal with a threshold; and determining that the converter device has a short circuit, when the processed differential current signal is higher than the threshold.
  • the differential current signal is a signal proportional to the differential current; and the method further comprises: high-pass filtering the differential current signal; comparing the high-pass filtered differential current signal with the threshold.
  • the integrator may be tuned that frequencies lower than a threshold frequency are filtered out. For example, the threshold frequency may be equal and/or higher than an output frequency of the converter and/or corresponding half-bridge module.
  • the differential current signal is a signal corresponding to a time derivative of the differential current.
  • the differential current signal may be generated with a current sensor as described in the above and the below, which measures a varying magnetic field generated by the currents through the DC terminals.
  • the method further comprises: comparing the differential current signal corresponding to a time derivative directly with the threshold.
  • a measurement of the time variations dl/dt of the differential current may not gather a significant differential current signal. Only during short circuit events, there may be a significant signal on the dl/dt measurement. A complex postprocessing of the differential current signal is not needed.
  • the method further comprises: integrating the differential current signal with an integrator having a lower cut-off frequency higher than a threshold frequency, before comparing the differential current signal with the threshold.
  • the cut-off frequency may be equal and/or higher than an output frequency of the converter and/or corresponding half-bridge module.
  • the method further comprises: receiving at least two differential current signals from two different half-bridge modules of the converter device and comparing them with a threshold; and determining that the converter device has a short circuit, when two of the received differential current signals are higher than the threshold. It also may be that not only one but two or more of the differential current signals are evaluated.
  • the half-bridge module with the short circuit may be determined.
  • a direction of a differential current may be determined based on a sign of the differential current signal.
  • Fig. 1A to ID schematically show different states of a half-bridge module used in a converter device according to an embodiment of the invention.
  • Fig. 2A and 2B show different states of a converter device according to an embodiment of the invention.
  • Fig. 3 schematically shows a perspective view of a half-bridge module for a converter device according to an embodiment of the invention.
  • Fig. 4 schematically shows a perspective view of a half-bridge module for a converter device according to an embodiment of the invention.
  • Fig. 5 schematically shows a perspective view of a half-bridge module for a converter device according to an embodiment of the invention.
  • Fig. 6 shows a flow diagram for a method for detecting a short circuit in a converter device according to an embodiment of the invention.
  • Fig. 1A to ID show a circuit diagram for a half-bridge module 10, which comprises two semiconductor switches 12, 14 connected in series.
  • Each semiconductor switch 14 comprises a thyristor or transistor, i.e. a switchable semiconductor element, connected in parallel with a free-wheeling diode.
  • the series connection of semiconductor switches 12, 14 provides a DC+ output 16 and a DC- output 18 at its ends. Between the semiconductor switches 12, 14, an AC output 20 is provided.
  • the half-bridge module 10 When the half-bridge module 10 is used as a part of an electrical converter, it may be interconnected with a DC link 22 as shown in Fig. 1A to ID.
  • Fig. 1A and Fig IB show a current path 24 through the half-bridge module 10 after and before a turn-on event of the upper semiconductor switch 12.
  • the current in Fig. IB has a negative time derivative dl/dt, since the current through the free-wheeling diode is falling to zero.
  • the current in Fig. 1 A has the same but opposite time derivative dl/dt. Since the current is taken over by the semiconductor switch 14, the transient current follows the current path as shown in Fig. 1C.
  • Fig. ID shows the current path 24 during a short circuit event, which is qualitatively the same as for the transient current. However, in the case of a short circuit, the current is usually much higher.
  • the dl/dt signal may need to be post-processed, for example using an integrator with a reset to eliminate a DC current component.
  • Fig. 2A and 2B show a converter device 26 composed of three half-bridge modules 10 in different states.
  • Fig. 2A shows the current paths 24 for the commutation current flow during normal operation.
  • Fig. 2B shows the current paths 24 for a short circuit current during a short circuit event 28.
  • the half-bridge modules 10 are connected in parallel, i.e. their DC+ outputs 16 are connected with each other providing a DC+ output of the converter device 26, their DC- outputs 18 are connected with each other providing a DC- output of the converter device 26 and their AC outputs 20 are connected with each other providing an AC output of the converter device 26.
  • the current I or the time derivative dl/dt of the current is evenly distributed between the half-bridge modules 10.
  • the current I commutates from the DC+ output 16 to the DC- output of every half-bridge module 10 or vice versa, making the sum of the currents or the time derivative dl/dt of the currents equal 0.
  • the differential current i.e. the difference of the current through the DC+ output and the current through the DC- output, and also the time derivative dl/dt of the differential current is substantially 0.
  • the current I or the time derivative dl/dt of the current is not evenly distributed between the half-bridge modules 10.
  • the current I On one side of the half-bridge modules 10 (here the upper side), the current I only flows through the short circuited semiconductor switch 12.
  • the current may be concentrated in a single failed semiconductor switch 12, whereas it is shared by all working opposite semiconductor switches 12. This is due to the interconnection of the half-bridge modules 10 via their AC outputs 20.
  • the differential current of every half-bridge module 10 is different from 0. The same applies to the time derivative dl/dt of the differential current.
  • the two half-bridge modules 10 on the right, i.e. the working half-bridge modules 10, have no current in the DC+ output 16 and a current of Isc in the DC- output 18, resulting in a differential current of -Isc.
  • the output current I through the AC output 20 may also produce a differential current in the half-bridge modules 10.
  • the corresponding current I may be lower by a factor of about 3 to 10 and/or time derivatives dl/dt may be much lower, for example by a factor of more than 100 or more than 1000.
  • the differential current may be measured with a sensor 30 that may be provided in one, some or all of the half-bridge modules 10. It is possible that this sensor 30 is designed, such that it senses only the differential current and not the individual currents in the DC+ output and DC- output. It is also possible that the sensor 30 senses the time derivative of the differential current. Such sensors 30 will be described in the following.
  • the sensor 30 produces a differential current signal 32, which is received by a controller 34, which processes the differential current signal 32 to detect a short circuit event 28.
  • Fig. 3, 4 and 5 show a schematic perspective view of a half-bridge module 10 and in particular of its housing 36.
  • the semiconductor switches 12, 14 are inside the housing 36.
  • the DC+ output 16, DC- output 18 and AC output 20 provided by the half-bridge are connected with a DC+ terminal 38, a DC- terminal 40, and an AC terminal 42, respectively, which protrude from the housing 36 from one side.
  • the DC+ terminal 38 and the DC- terminal 40 are arranged side by side and provide two conductors, each of which generates a magnetic field based on the time derivate dl/dt of the current flowing through it.
  • the two magnetic fields add up to an effective magnetic field indicative of the time derivative of the differential current. This magnetic field may be transformed into the differential current signal 32 in different ways.
  • both DC terminals 38, 40 may be surrounded by a Rogowski coil 44.
  • the magnetic field of both DC terminals 38, 40 induces a voltage in the Rogowski coil 44, which is substantially proportional to the time derivative of the differential current and may be used as differential current signal 32.
  • Fig. 4 shows a sensor 30 comprising a transformer arrangement 46 with a ring of magnetic material 48, which surrounds the DC terminals 38, 40, which may be seen as primary side of the transformer arrangement 46.
  • a coil 50 is wound around the ring of magnetic material 48, which may be seen as secondary side.
  • the differential current generates a magnetic field in the ring 48, which induces a voltage in the coil 50, which is substantially proportional to the time derivative of the differential current and may be used as differential current signal 32.
  • a pick-up coil arrangement 52 which comprises several coils 54, 54', 54" arranged around the DC terminals 38, 40.
  • the pick-up coil arrangement may be a printed circuit board 52, in which the coils 54, 54', 54" are realized with metallization layers of the printed circuit board 52.
  • the coils 54, 54' on opposite sides of the DC terminals 38, 40 may be wound in the same direction with respect to a direction around the DC terminals 38, 40.
  • a further coil 54" at a further side of the DC terminals 38, 40 may be wound in the opposite direction.
  • the coils 54, 54', 54" may be connected in series and the number of conductor loops per coil 54, 54', 54" may be chosen such that the magnetic fields from the DC terminal 38, 40 induces a sum voltage in the series connection of coils 54, 54', 54", which is indicative of the time derivative of the differential current.
  • the sum voltage of the coils 54, 54', 54" then may be used as differential current signal 32.
  • Fig. 6 shows a flow diagram for a method for detecting a short circuit 28 in a converter device 26, which may be performed by the controller 34.
  • step S10 the controller 34 receives one or more differential current signals 32 from one or more current sensors 30 of the half-bridge modules 10.
  • a short circuit event 28 produces a differential current in every half-bridge module 10 as described with respect to Fig. 2B, it is enough that only one differential current signal 32 is evaluated. However, more than one differential current signal 32 may be used for redundancy reasons and/or for determining the failed half-bridge module 10.
  • step S12 the controller 34 optionally processes the one or more differential current signals 32. Furthermore, after the optional processing, the controller 34 compares each of the one or more differential current signals 32 with a threshold and determines that the converter device 26 has a short circuit 28, when the one or all differential current signals 32 are higher than the threshold.
  • the processing of the one or more differential current signals 32 may performed in the following way:
  • a differential current signals 32 When a differential current signals 32 is proportional to the differential current, it may be high-pass filtered, such that only frequencies higher than the usual frequencies generated during normal operation of the corresponding half-bridge module are filtered out. In such a way, only differential current components with frequencies generated by a short-circuit event may be compared with the threshold.
  • the differential current signal 32 is a signal corresponding to a time derivative of the differential current, such as provided by the current sensors 30 as described with respect to Fig. 3, 4 and 5.
  • the differential current signal 32 may be integrated with an integrator having a lower cut-off frequency higher the usual frequencies generated during normal operation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

Dispositif convertisseur (26) comprenant au moins deux modules demi-pont (10), chaque module demi-pont (10) comprenant deux commutateurs de semi-conducteur (12, 14) connectés en série entre une sortie CC + (16) et une sortie CC- (18) et fournissant une sortie CA (20) entre eux ; les modules demi-pont (10) étant connectés en parallèle les uns aux autres, de telle sorte que les sorties CC + (16) sont connectées les unes aux autres, les sorties CC- (18) sont connectées les unes aux autres et les sorties de courant alternatif (20) sont connectées les unes aux autres ; et au moins l'un des modules demi-pont (10) comprend un capteur de courant (30) conçu pour détecter un signal de courant différentiel (32) d'un courant différentiel entre la sortie CC + (16) et la sortie CC- (18), le courant différentiel étant une différence entre un courant dans la sortie CC + (16) et un courant hors de la sortie CC-(18).
EP18717384.4A 2017-04-20 2018-04-18 Détection de court-circuit dans des modules demi-pont parallèles Ceased EP3610565A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17167293 2017-04-20
PCT/EP2018/059963 WO2018193003A1 (fr) 2017-04-20 2018-04-18 Détection de court-circuit dans des modules demi-pont parallèles

Publications (1)

Publication Number Publication Date
EP3610565A1 true EP3610565A1 (fr) 2020-02-19

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EP18717384.4A Ceased EP3610565A1 (fr) 2017-04-20 2018-04-18 Détection de court-circuit dans des modules demi-pont parallèles

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EP (1) EP3610565A1 (fr)
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3694090B1 (fr) * 2019-02-07 2022-09-28 Mitsubishi Electric R & D Centre Europe B.V. Procédé et système de protection d'au moins deux semiconducteurs de puissance d'un convertisseur en demi-pont
EP3907869A1 (fr) * 2020-05-04 2021-11-10 Mitsubishi Electric R&D Centre Europe B.V. Procédé et système de commande pour convertisseur de puissance et convertisseur de puissance comprenant de tels procédé et système de commande

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013044965A1 (fr) * 2011-09-29 2013-04-04 Siemens Aktiengesellschaft Commutateur de semi-conducteur de puissance de conception modulaire avec surveillance de la symétrie de la répartition du courant pour la détection de défaillances
DE102013108078B4 (de) 2013-07-29 2021-09-09 Semikron Elektronik Gmbh & Co. Kg Leistungshalbleiterschaltung
WO2015114789A1 (fr) * 2014-01-31 2015-08-06 株式会社日立製作所 Dispositif de conversion d'énergie

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