WO2018001589A1 - Apparatus for operating an electric machine of a motor vehicle, electric machine device, and motor vehicle - Google Patents

Apparatus for operating an electric machine of a motor vehicle, electric machine device, and motor vehicle Download PDF

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Publication number
WO2018001589A1
WO2018001589A1 PCT/EP2017/058851 EP2017058851W WO2018001589A1 WO 2018001589 A1 WO2018001589 A1 WO 2018001589A1 EP 2017058851 W EP2017058851 W EP 2017058851W WO 2018001589 A1 WO2018001589 A1 WO 2018001589A1
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WO
WIPO (PCT)
Prior art keywords
electric machine
circuit
motor vehicle
main switch
bridge
Prior art date
Application number
PCT/EP2017/058851
Other languages
German (de)
French (fr)
Inventor
Volker Weeber
Thomas Saile
Ingo Koehler
Simon Riedel
Oda Limbach
Stefan Hoess
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2018001589A1 publication Critical patent/WO2018001589A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
    • 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
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the invention relates to a device for operating an electric motor of a motor vehicle, comprising a circuit which connects the electric machine with an energy store, wherein the circuit comprises a main switch and a bridge circuit for the electric machine, and wherein between the bridge circuit and the main switch an intermediate circuit with at least one is formed parallel to the power source connected intermediate circuit capacitor.
  • the invention relates to an electric machine device for a
  • Motor vehicle with an electric machine and an energy storage, between which the above-mentioned device is connected.
  • the invention relates to a motor vehicle with such
  • the bridge circuit is usually a DC link with preceded by at least one intermediate circuit capacitor, which as
  • Suppressor for example, for harmonics, between pulsed currents of the bridge circuit and the supply current from the
  • Supply line is used. Between the intermediate circuit and energy storage is also a main switch in a supply line or
  • Power supply to the DC link and the bridge circuit can be made or separated. If a short circuit occurs in the bridge circuit due to a fault, the current within the bridge circuit rises rapidly, as a result of which switching of individual semiconductor switches of the
  • Bridge switch is only possible outside of an actually permissible current range of the respective semiconductor switch.
  • the device according to the invention with the features of claim 1 has the advantage that a switching of the main switch is still possible if one of the semiconductor switches of the bridge circuit has a short circuit.
  • a filter is interposed in the supply line of the circuit between the main switch and the intermediate circuit.
  • a decoupling of the short-circuit current in the intermediate circuit and bridge circuit is achieved to the supply line.
  • the current in the supply line can be switched on detection of a short-circuit current in at least one phase of the electric machine still at an allowable current for the main switch.
  • the filter has an inductance.
  • the inductance of the power in the supply line is advantageously limited to a permissible current for the main switch.
  • Reverse polarity protection is interposed. This ensures that through the Short circuit the polarity of the circuit is not changed, so
  • the energy storage is protected from damage.
  • the intermediate circuit has two DC link capacitors connected in parallel, wherein the filter in the supply line between the
  • the bridge circuit is designed as a B6 bridge.
  • the bridge circuit thus preferably has three half-bridges, each with two semiconductor switches, in particular MOSFETs.
  • the electric machine device according to the invention with the features of claim 6 is characterized by a between electric machine and
  • the motor vehicle according to the invention with the features of claim 7 is characterized by the inventive electric machine device. This results in the already mentioned advantages.
  • the single figure shows in a simplified circuit diagram a
  • Electric machine arrangement for a motor vehicle not shown here has a device 1 for operating an electric machine 2, which according to the present exemplary embodiment has three electrical phases U, V, W includes.
  • a circuit 3 of the device 1 the electric machine 2 with an energy storage 4 electrically operatively connected or operatively connected.
  • the circuit 3 has a bridge circuit 5 which has a half bridge 5_1, 5_2 and 5_3 for each phase U, V, W of the electric machine 2.
  • Each of the half bridges 5_1, 5_2 and 5_3 has two series-connected semiconductor switches 6 in each case.
  • Each semiconductor switch 6 is a freewheeling diode 7 connected.
  • Each of the half bridges 5_1, 5_2 and 5_3 is connected to one of the phases U, V, W between the respective semiconductor switches 6.
  • Each half-bridge 5_1, 5_2 and 5_3 is also connected to a supply line 8 coming from the energy store 4 and to a mass line 9.
  • the bridge circuit 5 is further preceded by a DC link 10, which has at least one DC link capacitor 12, which is optionally connected in parallel with a second DC link capacitor 11, which is also connected in parallel to the power source 4, ie between supply line 8 and ground line 9, is located.
  • the intermediate circuit 10 is connected in the supply line 8 by a main switch 13 and an optional Verpoltik 14 with the energy storage 4. Between the main switch and the
  • the electrical supply of the electric machine 2 is thus effected via the
  • the advantageous filter 15 ensures that the current increase takes place via the supply line and the main switch 13 with a reduced current gradient, whereby switching of the main switch 13 is still possible in the permissible current range of the main switch 13. This is ensures that the remaining semiconductor switch 6 of the bridge circuit 5 is not damaged by the short circuit and the half bridges not affected by the short circuit can continue to operate. In this case, the half-bridge with the short circuit is no longer used to operate the electric machine. This allows a two-phase operation to be maintained.

Abstract

The invention relates to an apparatus (1) for operating an electric machine (2) of a motor vehicle, having a circuit which connects the electric machine (2) to an energy store (4), wherein the circuit (3) has a main switch (13) and a bridge circuit (5) for the electric machine (2), and wherein an intermediate circuit (10) having at least one intermediate circuit capacitor (12) connected in parallel with the energy source (4) is formed between the bridge circuit (5) and the main switch (13). Provision is made for a filter (15) to be interposed between the main switch (13) and the intermediate circuit (10) in a supply line (8) of the circuit (3).

Description

Beschreibung Titel  Description title
Vorrichtung zum Betreiben einer Elektromaschine eines Kraftfahrzeugs, Elektromaschineneinrichtung und Kraftfahrzeug  Device for operating an electric machine of a motor vehicle, electric machine device and motor vehicle
Die Erfindung betrifft eine Vorrichtung zum Betreiben einer Elektromaschine eines Kraftfahrzeugs, mit einer Schaltung, die die Elektromaschine mit einem Energiespeicher verbindet, wobei die Schaltung einen Hauptschalter und eine Brückenschaltung für die Elektromaschine aufweist, und wobei zwischen der Brückenschaltung und dem Hauptschalter ein Zwischenkreis mit wenigstens einem parallel zur Energiequelle geschalteten Zwischenkreiskondensator ausgebildet ist. The invention relates to a device for operating an electric motor of a motor vehicle, comprising a circuit which connects the electric machine with an energy store, wherein the circuit comprises a main switch and a bridge circuit for the electric machine, and wherein between the bridge circuit and the main switch an intermediate circuit with at least one is formed parallel to the power source connected intermediate circuit capacitor.
Ferner betrifft die Erfindung eine Elektromaschineneinrichtung für ein Furthermore, the invention relates to an electric machine device for a
Kraftfahrzeug, mit einer Elektromaschine und einem Energiespeicher, zwischen denen die oben genannte Vorrichtung geschaltet ist. Motor vehicle, with an electric machine and an energy storage, between which the above-mentioned device is connected.
Außerdem betrifft die Erfindung ein Kraftfahrzeug mit einer derartigen Moreover, the invention relates to a motor vehicle with such
Elektromaschineneinrichtung. Electrical machinery equipment.
Stand der Technik State of the art
Aus dem Stand der Technik sind Vorrichtungen der eingangs genannten Art bereits bekannt. Es ist üblich, die Phasen einer Elektromaschine mittels einer Brückenschaltung anzusteuern. Bekannte Brückenschaltungen weisen insbesondere parallel geschaltete Halbbrücken mit jeweils zwei Devices of the type mentioned above are already known from the prior art. It is customary to control the phases of an electric machine by means of a bridge circuit. Known bridge circuits have, in particular, parallel half bridges with two each
Halbleiterschaltern auf, wobei jede Halbbrücke mit einer Phase der Semiconductor switches on, each half-bridge with a phase of
Elektromaschine verbunden beziehungsweise verbindbar ist, um durch die Betätigung der Halbleiterschalter die Phasen der Elektromaschine individuell anzusteuern. Der Brückenschaltung ist in der Regel ein Zwischenkreis mit zumindest einem Zwischenkreiskondensator vorgeschaltet, der als Electric machine is connected or connectable to individually control by actuation of the semiconductor switches, the phases of the electric machine. The bridge circuit is usually a DC link with preceded by at least one intermediate circuit capacitor, which as
Entstörkomponente, beispielweise für Oberschwingungen, zwischen gepulsten Strömen der Brückenschaltung und dem Versorgungsstrom aus der Suppressor, for example, for harmonics, between pulsed currents of the bridge circuit and the supply current from the
Versorgungsleitung dient. Zwischen Zwischenkreis und Energiespeicher ist außerdem ein Hauptschalter in einer Versorgungsleitung beziehungsweiseSupply line is used. Between the intermediate circuit and energy storage is also a main switch in a supply line or
Zuleitung zu dem Zwischenkreis angeordnet, mittels dessen die Supply line arranged to the intermediate circuit, by means of which the
Energieversorgung zu dem Zwischenkreis und der Brückenschaltung hergestellt oder getrennt werden kann. Entsteht aufgrund eines Fehlers ein Kurzschluss in der Brückenschaltung, so steigt der Strom innerhalb der Brückenschaltung schnell an, wodurch ein Schalten einzelner Halbleiterschalter der Power supply to the DC link and the bridge circuit can be made or separated. If a short circuit occurs in the bridge circuit due to a fault, the current within the bridge circuit rises rapidly, as a result of which switching of individual semiconductor switches of the
Brückenschalter nur noch außerhalb eines eigentlich zulässigen Strombereichs des jeweiligen Halbleiterschalters möglich ist.  Bridge switch is only possible outside of an actually permissible current range of the respective semiconductor switch.
Offenbarung der Erfindung Disclosure of the invention
Die erfindungsgemäße Vorrichtung mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass ein Schalten des Hauptschalters noch möglich ist, wenn einer der Halbleiterschalter der Brückenschaltung einen Kurzschluss aufweist. The device according to the invention with the features of claim 1 has the advantage that a switching of the main switch is still possible if one of the semiconductor switches of the bridge circuit has a short circuit.
Erfindungsgemäß ist dazu vorgesehen, dass in der Versorgungsleitung der Schaltung zwischen dem Hauptschalter und dem Zwischenkreis ein Filter zwischengeschaltet ist. Durch den Filter in der Versorgungsleitung According to the invention it is provided that in the supply line of the circuit between the main switch and the intermediate circuit, a filter is interposed. Through the filter in the supply line
beziehungsweise Zuleitung wird eine Entkopplung vom Kurzschlussstrom im Zwischenkreis und Brückenschaltung zu der Versorgungsleitung erreicht. Der Strom in der Versorgungsleitung kann bei Erkennen eines Kurzschlussstroms in wenigstens einer Phase der Elektromaschine noch bei einem zulässigen Strom für den Hauptschalter geschaltet werden. or supply line, a decoupling of the short-circuit current in the intermediate circuit and bridge circuit is achieved to the supply line. The current in the supply line can be switched on detection of a short-circuit current in at least one phase of the electric machine still at an allowable current for the main switch.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist vorgesehen, dass der Filter eine Induktivität aufweist. Durch die Induktivität wird der Strom in der Versorgungsleitung vorteilhaft auf einen zulässigen Strom für den Hauptschalter begrenzt. According to a preferred embodiment of the invention, it is provided that the filter has an inductance. The inductance of the power in the supply line is advantageously limited to a permissible current for the main switch.
Optional ist vorgesehen, dass zwischen Hauptschalter und Filter ein Optionally, it is provided that between main switch and filter
Verpolschutz zwischengeschaltet ist. Dieser gewährleistet, dass durch den Kurzschluss die Polarität der Schaltung nicht gewechselt wird, sodass Reverse polarity protection is interposed. This ensures that through the Short circuit the polarity of the circuit is not changed, so
insbesondere der Energiespeicher vor Beschädigungen geschützt ist. In particular, the energy storage is protected from damage.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist vorgesehen, dass der Zwischenkreis zwei parallel geschaltete Zwischenkreiskondensatoren aufweist, wobei der Filter in der Versorgungsleitung zwischen den According to a preferred embodiment of the invention, it is provided that the intermediate circuit has two DC link capacitors connected in parallel, wherein the filter in the supply line between the
Zwischenkreiskondensatoren angeordnet ist. Hierdurch ergibt sich eine vorteilhafte Auslegung der Schaltung. DC link capacitors is arranged. This results in an advantageous design of the circuit.
Insbesondere ist vorgesehen, dass die Brückenschaltung als B6-Brücke ausgebildet ist. Die Brückenschaltung weist somit bevorzugt drei Halbbrücken mit jeweils zwei Halbleiterschaltern, insbesondere MOSFETs, auf. In particular, it is provided that the bridge circuit is designed as a B6 bridge. The bridge circuit thus preferably has three half-bridges, each with two semiconductor switches, in particular MOSFETs.
Die erfindungsgemäße Elektromaschineneinrichtung mit den Merkmalen des Anspruchs 6 zeichnet sich durch eine zwischen Elektromaschine und The electric machine device according to the invention with the features of claim 6 is characterized by a between electric machine and
Energiespeicher geschaltete Vorrichtung aus, die der erfindungsgemäßen Vorrichtung entspricht. Es ergeben sich hierbei die bereits genannten Vorteile. Energy storage switched device, which corresponds to the device according to the invention. This results in the already mentioned advantages.
Das erfindungsgemäße Kraftfahrzeug mit den Merkmalen des Anspruchs 7 zeichnet sich durch die erfindungsgemäße Elektromaschineneinrichtung aus. Es ergeben sich die bereits genannten Vorteile. The motor vehicle according to the invention with the features of claim 7 is characterized by the inventive electric machine device. This results in the already mentioned advantages.
Weitere Vorteile und bevorzugte Merkmale und Merkmalskombinationen ergeben sich insbesondere aus dem zuvor Beschriebenen sowie aus den Ansprüchen. Further advantages and preferred features and combinations of features emerge in particular from the previously described and from the claims.
Im Folgenden soll die Erfindung anhand der Zeichnung näher erläutert werden. Dazu zeigt die einzige In the following, the invention will be explained in more detail with reference to the drawing. The only one shows
Figur eine Elektromaschineneinrichtung eines Kraftfahrzeugs in einer Figure an electrical machine device of a motor vehicle in one
vereinfachten Darstellung.  simplified representation.
Die einzige Figur zeigt in einer vereinfachten Schaltungsdarstellung eine The single figure shows in a simplified circuit diagram a
Elektromaschinenanordnung für ein hier nicht näher dargestelltes Kraftfahrzeug. Die Elektromaschinenanordnung weist eine Vorrichtung 1 zum Betreiben einer Elektromaschine 2 auf, die gemäß dem vorliegenden Ausführungsbeispiel drei elektrische Phasen U, V, W umfasst. Durch eine Schaltung 3 der Vorrichtung 1 ist die Elektromaschine 2 mit einem Energiespeicher 4 elektrisch wirkverbunden beziehungsweise wirkverbindbar. Electric machine arrangement for a motor vehicle not shown here. The electric machine arrangement has a device 1 for operating an electric machine 2, which according to the present exemplary embodiment has three electrical phases U, V, W includes. By a circuit 3 of the device 1, the electric machine 2 with an energy storage 4 electrically operatively connected or operatively connected.
Die Schaltung 3 weist eine Brückenschaltung 5 auf, die für jede Phase U, V, W der Elektromaschine 2 jeweils eine Halbbrücke 5_1, 5_2 und 5_3 aufweist. Jede der Halbbrücken 5_1, 5_2 und 5_3 weist jeweils zwei in Reihe geschaltete Halbleiterschalter 6 auf. Jedem Halbleiterschalter 6 ist dabei eine Freilaufdiode 7 zugeschaltet. Jede der Halbbrücken 5_1, 5_2 und 5_3 ist dabei mit einer der Phasen U, V, W zwischen den jeweiligen Halbleiterschaltern 6 verbunden. Jede Halbbrücke 5_1, 5_2 und 5_3 ist außerdem mit einer von dem Energiespeicher 4 kommenden Versorgungsleitung 8 und mit einer Massenleitung 9 verbunden. The circuit 3 has a bridge circuit 5 which has a half bridge 5_1, 5_2 and 5_3 for each phase U, V, W of the electric machine 2. Each of the half bridges 5_1, 5_2 and 5_3 has two series-connected semiconductor switches 6 in each case. Each semiconductor switch 6 is a freewheeling diode 7 connected. Each of the half bridges 5_1, 5_2 and 5_3 is connected to one of the phases U, V, W between the respective semiconductor switches 6. Each half-bridge 5_1, 5_2 and 5_3 is also connected to a supply line 8 coming from the energy store 4 and to a mass line 9.
Der Brückenschaltung 5 ist weiterhin ein Zwischenkreis 10 vorgeschaltet, welcher mindestens einen Zwischenkreiskondensatorl2 aufweist, dem optional ein zweiter Zwischenkreiskondensator 11 parallel geschaltet ist, der außerdem parallel zu der Energiequelle 4 geschaltet ist, also zwischen Versorgungsleitung 8 und Massenleitung 9, liegt. Der Zwischenkreis 10 ist in der Versorgungsleitung 8 durch einen Hauptschalter 13 und einen optionalen Verpolschutz 14 mit dem Energiespeicher 4 verbunden. Zwischen dem Hauptschalter und der The bridge circuit 5 is further preceded by a DC link 10, which has at least one DC link capacitor 12, which is optionally connected in parallel with a second DC link capacitor 11, which is also connected in parallel to the power source 4, ie between supply line 8 and ground line 9, is located. The intermediate circuit 10 is connected in the supply line 8 by a main switch 13 and an optional Verpolschutz 14 with the energy storage 4. Between the main switch and the
Zwischenkreiskondensatorl2 ist außerdem in der Versorgungsleitung 8 ein Filter 15 in Form einer Induktivität angeordnet. Zwischenkreiskondensatorl2 is also arranged in the supply line 8, a filter 15 in the form of an inductance.
Die elektrische Versorgung der Elektromaschine 2 erfolgt somit über den The electrical supply of the electric machine 2 is thus effected via the
Hauptschalter 13, den optionalen Verpolschutz 14, die nachgeschaltete Main switch 13, the optional reverse polarity protection 14, the downstream
Induktivität 15 auf den Zwischenkreiskondensatorl2 und die Brückenschaltung 5. Bei einem Kurzschluss in einer der Halbbrücken 5_1, 5_2 und 5_3 Inductance 15 on the DC link capacitor L2 and the bridge circuit 5. In the case of a short circuit in one of the half bridges 5_1, 5_2 and 5_3
beziehungsweise in einem der Halbleiterschalter 6 steigt der Strom aufgrund der niederohmigen Anbindung der Brückenschaltung 5 an den Zwischenkreis 10 sehr schnell an, wodurch ein Schalten der einzelnen Halbleiterschalter 6 or in one of the semiconductor switches 6, the current rises very rapidly due to the low-resistance connection of the bridge circuit 5 to the intermediate circuit 10, as a result of which switching of the individual semiconductor switches 6
beziehungsweise MOSFETs nur noch außerhalb ihres zulässigen Strombereichs möglich wäre. Durch den vorteilhaften Filter 15 wird gewährleistet, dass der Stromanstieg über die Zuleitung und den Hauptschalter 13 mit einem reduzierten Stromgradienten erfolgt, wodurch ein Schalten des Hauptschalters 13 noch im zulässigen Strombereich des Hauptschalters 13 möglich ist. Dadurch ist gewährleistet, dass die verbleibenden Halbleiterschalter 6 der Brückenschaltung 5 durch den Kurzschluss nicht beschädigt und die nicht vom Kurzschluss betroffenen Halbbrücken weiter betrieben werden können. Dabei wird die Halbbrücke mit dem Kurzschluss nicht mehr zum Betreiben der Elektromaschine verwendet. Dadurch kann ein zweiphasiger Betrieb aufrechterhalten werden. or MOSFETs would be possible only outside their allowable current range. The advantageous filter 15 ensures that the current increase takes place via the supply line and the main switch 13 with a reduced current gradient, whereby switching of the main switch 13 is still possible in the permissible current range of the main switch 13. This is ensures that the remaining semiconductor switch 6 of the bridge circuit 5 is not damaged by the short circuit and the half bridges not affected by the short circuit can continue to operate. In this case, the half-bridge with the short circuit is no longer used to operate the electric machine. This allows a two-phase operation to be maintained.

Claims

Ansprüche Expectations
Vorrichtung (1) zum Betreiben einer Elektromaschine (2) eines Device (1) for operating an electric machine (2).
Kraftfahrzeugs, mit einer Schaltung, die die Elektromaschine Motor vehicle, with a circuit that controls the electric machine
(2) mit einem Energiespeicher (4) verbindet, wobei die Schaltung (2) connects to an energy storage device (4), the circuit
(3) einen Hauptschalter (13) und eine Brückenschaltung (5) für die Elektromaschine (2) aufweist, und wobei zwischen der Brückenschaltung (5) und dem Hauptschalter (13) ein Zwischenkreis (10) mit wenigstens einem parallel zur Energiequelle (3) has a main switch (13) and a bridge circuit (5) for the electric machine (2), and wherein between the bridge circuit (5) and the main switch (13) there is an intermediate circuit (10) with at least one parallel to the energy source
(4) geschalteten Zwischenkreiskondensator (12) ausgebildet ist, dadurch gekennzeichnet, dass in einer Versorgungsleitung (8) der Schaltung (3) zwischen dem Hauptschalter (13) und dem Zwischenkreis (10) ein Filter (15) zwischengeschaltet ist. (4) connected intermediate circuit capacitor (12), characterized in that a filter (15) is interposed in a supply line (8) of the circuit (3) between the main switch (13) and the intermediate circuit (10).
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Filter (15) eine Induktivität aufweist. Device according to claim 1, characterized in that the filter (15) has an inductance.
Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen Hauptschalter (13) und Filter (15) ein Verpolschutz (14) zwischengeschaltet ist. Device according to one of the preceding claims, characterized in that a reverse polarity protection (14) is interposed between the main switch (13) and the filter (15).
Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zwischenkreis (10) zwei parallel geschaltete Zwischenkreiskondensatoren (11,12) aufweist, wobei der Filter (15) zwischen den Zwischenkreiskondensatoren in der Versorgungsleitung (8) angeordnet ist. Device according to one of the preceding claims, characterized in that the intermediate circuit (10) has two intermediate circuit capacitors (11, 12) connected in parallel, the filter (15) being arranged between the intermediate circuit capacitors in the supply line (8).
Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Brückenschaltung Device according to one of the preceding claims, characterized in that the bridge circuit
(5) als B6-Brücke mit drei jeweils zwei Halbleiterschalter (6) aufweisenden Halbbrücken (5_1,5_2,5_3) ausgebildet ist. (5) is designed as a B6 bridge with three half bridges (5_1,5_2,5_3), each having two semiconductor switches (6).
6. Elektromaschineneinrichtung für ein Kraftfahrzeug, mit einer Elektromaschine (2) und einem Energiespeicher (4), gekennzeichnet durch eine zwischen der Elektromaschine (2) und dem Energiespeicher (4) geschaltete Vorrichtung (1) nach einem oder mehreren der Ansprüche 1 bis 5.6. Electric machine device for a motor vehicle, with an electric machine (2) and an energy storage device (4), characterized by an intermediate The device (1) connected to the electric machine (2) and the energy storage (4) according to one or more of claims 1 to 5.
Kraftfahrzeug mit einer Elektromaschineneinrichtung nach Anspruch 6. Motor vehicle with an electric machine device according to claim 6.
PCT/EP2017/058851 2016-06-27 2017-04-12 Apparatus for operating an electric machine of a motor vehicle, electric machine device, and motor vehicle WO2018001589A1 (en)

Applications Claiming Priority (2)

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DE102016211425.5A DE102016211425A1 (en) 2016-06-27 2016-06-27 Device for operating an electric machine of a motor vehicle, electric machine device and motor vehicle

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2594424A1 (en) * 2010-07-14 2013-05-22 Toyota Jidosha Kabushiki Kaisha Controller for vehicle
DE112012001311T5 (en) * 2011-06-28 2014-01-02 Aisin Aw Co.,Ltd. Control device of a rotating electrical machine
DE102014116689A1 (en) * 2014-11-14 2016-05-19 Minebea Co., Ltd. Device and method for securing a drive control against supply voltage failures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2594424A1 (en) * 2010-07-14 2013-05-22 Toyota Jidosha Kabushiki Kaisha Controller for vehicle
DE112012001311T5 (en) * 2011-06-28 2014-01-02 Aisin Aw Co.,Ltd. Control device of a rotating electrical machine
DE102014116689A1 (en) * 2014-11-14 2016-05-19 Minebea Co., Ltd. Device and method for securing a drive control against supply voltage failures

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