DE102017216386A1 - Traction network of a motor vehicle - Google Patents
Traction network of a motor vehicle Download PDFInfo
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- DE102017216386A1 DE102017216386A1 DE102017216386.0A DE102017216386A DE102017216386A1 DE 102017216386 A1 DE102017216386 A1 DE 102017216386A1 DE 102017216386 A DE102017216386 A DE 102017216386A DE 102017216386 A1 DE102017216386 A1 DE 102017216386A1
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- switching element
- electric machine
- switching elements
- traction network
- inductances
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- 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
- H02M7/53871—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 with automatic control of output voltage or current
- H02M7/53875—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 with automatic control of output voltage or current with analogue control of three-phase output
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/24—Using the vehicle's propulsion converter for charging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
Die Erfindung betrifft ein Traktionsnetz (1) eines Kraftfahrzeuges, umfassend mindestens ein Steuergerät (6), eine Hochvoltbatterie, mindestens einen Zwischenkreiskondensator (3), eine dreiphasige Elektromaschine (5), einen Wechselrichter (4) mit drei Halbbrücken (7.1 - 7.3), wobei in den Halbbrücken (7.1 - 7.3) jeweils mindestens 2 Halbleiterschaltelemente (8.1 - 8.3, 9.1 - 9.3) angeordnet sind, zu denen jeweils eine Diode (D1 - D6) antiparallel geschaltet ist, wobei mindestens ein Anschluss (A) zum Anschließen einer externen Gleichspannungsquelle vorgesehen ist, wobei das Steuergerät (6) derart ausgebildet ist, den Wechselrichter (4) derart anzusteuern, das dieser unter Einschluss der Induktivitäten (L1 -L3) der Elektromaschine (5) als DC/DC-Wandler betrieben wird, wobei das Steuergerät (6) derart ausgebildet ist, dass zeitgleich nur zwei Phasen der Elektromaschine (5) bestromt werden.The invention relates to a traction network (1) of a motor vehicle, comprising at least one control unit (6), a high-voltage battery, at least one intermediate circuit capacitor (3), a three-phase electric machine (5), an inverter (4) with three half-bridges (7.1 - 7.3), wherein in the half bridges (7.1 - 7.3) in each case at least 2 semiconductor switching elements (8.1 - 8.3, 9.1 - 9.3) are arranged, to each of which a diode (D1 - D6) is connected in anti-parallel, wherein at least one terminal (A) for connecting an external DC voltage source is provided, wherein the control device (6) is designed such that the inverter (4) to control such that it is operated including the inductances (L1 -L3) of the electric machine (5) as a DC / DC converter, wherein the control unit (6) is designed such that at the same time only two phases of the electric machine (5) are energized.
Description
Die Erfindung betrifft ein Traktionsnetz eines Kraftfahrzeuges.The invention relates to a traction network of a motor vehicle.
Ein Traktionsnetz eines Kraftfahrzeuges umfasst üblicherweise mindestens ein Steuergerät, eine Hochvoltbatterie, mindestens einen Zwischenkreiskondensator, eine dreiphasige Elektromaschine und einen Wechselrichter mit drei Halbbrücken. In den Halbbrücken sind Halbleiterschaltelemente angeordnet, die vorzugsweise als Transistoren ausgebildet sind, wobei jede Halbbrücke ein Low-Side und ein High-Side-Schaltelement aufweist, zwischen denen der Mittelabgriff der Halbbrücke liegt. Antiparallel zu den Halbleiterschaltelementen sind Dioden angeordnet, die die Funktion von Freilaufdioden aufweisen. Dabei ist es weiter bekannt, dass das Traktionsnetz einen Anschluss zum Anschließen einer externen Gleichspannungsquelle vorgesehen ist, wobei das Steuergerät derart ausgebildet ist, den Wechselrichter derart auszusteuern, dass dieser unter Einschluss der Induktivitäten der Elektromaschine als DC/DC-Wandler arbeitetA traction network of a motor vehicle usually comprises at least one control unit, a high-voltage battery, at least one intermediate circuit capacitor, a three-phase electric machine and an inverter with three half-bridges. In the half bridges semiconductor switching elements are arranged, which are preferably formed as transistors, each half-bridge having a low-side and a high-side switching element, between which the center tap of the half-bridge is located. Antiparallel to the semiconductor switching elements diodes are arranged, which have the function of free-wheeling diodes. It is further known that the traction network is provided a connection for connecting an external DC voltage source, wherein the control device is designed such that the inverter so auszusteuern that it works to include the inductances of the electric machine as a DC / DC converter
Ein solches Traktionsnetz wird beispielsweise in der
Der Erfindung liegt das technische Problem zugrunde, ein Traktionsnetz für ein Kraftfahrzeug zu schaffen, wobei die Funktionalität des Wechselrichters, genutzt als DC/DC-Wandler insbesondere als Hochsetzsteller, verbessert ist.The invention is based on the technical problem of creating a traction network for a motor vehicle, wherein the functionality of the inverter, used as a DC / DC converter in particular as a step-up converter, is improved.
Die Lösung des technischen Problems ergibt sich durch ein Traktionsnetz mit den Merkmalen des Anspruchs 1. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.The solution of the technical problem results from a traction network with the features of
Hierzu umfasst das Traktionsnetz mindestens ein Steuergerät, eine Hochvoltbatterie, mindestens einen Zwischenkreiskondensator, eine dreiphasige Elektromaschine und einen Wechselrichter mit drei Halbbrücken, wobei in den Halbbrücken jeweils mindestens zwei Halbleiterschaltelemente angeordnet sind, zu denen jeweils eine Diode antiparallel geschaltet ist. Weiter ist mindestens ein Anschluss zum Anschließen einer externen Gleichspannungsquelle vorgesehen. Das Steuergerät ist derart ausgebildet, den Wechselrichter derart anzusteuern, dass dieser unter Einschluss der Induktivitäten der Elektromaschine als DC/DC-Wandler betrieben wird, wobei das Steuergerät derart ausgebildet ist, dass zeitgleich nur zwei Phasen der Elektromaschine bestromt werden. Hierdurch wird die wirksame Induktivität der Elektromaschine erhöht. Die Erfindung geht dabei von der Erkenntnis aus, dass sich bei einer gleichzeitigen Bestromung aller drei Phasen die sich aufbauenden Felder derart überlagern, dass die wirksame Induktivität sehr klein ist. Durch die Verwendung von nur zwei Phasen wird dies verbessert. Des Weiteren ist es so möglich, eine Rotorposition einzustellen, in der die Induktivitäten der beiden genutzten Phasen identisch sind, was zu einer gleichmäßigen Belastung im DC/DC-Betrieb und zu einer Verbesserung der Ansteuerung führt.For this purpose, the traction network comprises at least one control unit, a high-voltage battery, at least one DC link capacitor, a three-phase electric machine and an inverter with three half-bridges, wherein in the half bridges in each case at least two semiconductor switching elements are arranged, to each of which a diode is connected in anti-parallel. Furthermore, at least one connection is provided for connecting an external DC voltage source. The control unit is configured to control the inverter in such a way that it is operated as a DC / DC converter, including the inductances of the electric machine, the control unit being designed such that only two phases of the electric machine are energized at the same time. As a result, the effective inductance of the electric machine is increased. The invention is based on the recognition that superimposing at a simultaneous energization of all three phases, the constituent fields such that the effective inductance is very small. This is improved by using only two phases. Furthermore, it is possible to set a rotor position in which the inductances of the two phases used are identical, resulting in a uniform load in DC / DC operation and to improve the control.
In einer Ausführungsform ist der Anschluss der externen Gleichspannungsquelle mit einem Sternpunkt der Elektromaschine verbunden.In one embodiment, the terminal of the external DC voltage source is connected to a neutral point of the electric machine.
In einer alternativen Ausführungsform ist der Anschluss über mindestens ein Schaltelement an ein Low-Side Halbleiterschaltelement geführt, wobei mindestens ein weiteres Schaltelement zwischen dem Low-Side Halbleiterschaltelement und den benachbarten Low-Side Halbleiterschaltelementen angeordnet ist. Der Vorteil dieser Ausführungsform ist, dass der Sternpunkt nicht mehr herausgeführt werden muss, wobei der Strom durch die beiden in Reihe geschalteten Induktivitäten der beiden Phasen fließt, sodass nur eine Phase den eigentlichen Hochsetzsteller bildet.In an alternative embodiment, the connection is guided via at least one switching element to a low-side semiconductor switching element, wherein at least one further switching element between the low-side semiconductor switching element and the adjacent low-side semiconductor switching elements is arranged. The advantage of this embodiment is that the star point no longer has to be led out, wherein the current flows through the two series-connected inductors of the two phases, so that only one phase forms the actual step-up converter.
In einer weiteren Ausführungsform ist jedem Low-Side-Halbleiterschaltelement ein Schaltelement zum Anschluss zugeordnet, wobei zwischen den drei Low-Side-Schaltelementen jeweils ein weiteres Schaltelement angeordnet ist. Hierdurch kann jeweils gewechselt werden, welche Phasen an der DC/DC-Wandlung beteiligt sind, sodass insbesondere die thermische Belastung gleichmäßig verteilt werden kann.In a further embodiment, each switching element is assigned to each low-side semiconductor switching element, wherein in each case a further switching element is arranged between the three low-side switching elements. In this way it can be changed in each case, which phases are involved in the DC / DC conversion, so that in particular the thermal load can be evenly distributed.
In einer weiteren Ausführungsform sind das mindestens eine Schaltelement und/oder das mindestens eine weitere Schaltelement als Relais oder als Halbleiterschalter ausgebildet.In a further embodiment, the at least one switching element and / or the at least one further switching element are designed as relays or as semiconductor switches.
In einer weiteren Ausführungsform weist die Elektromaschine eine Polpaarzahl größer 1 auf, wobei die Induktivitäten der Polpaare einer Phase parallel geschaltet sind, wobei mindestens einer Induktivität Schaltelemente zugeordnet sind, wobei das Steuergerät derart ausgebildet ist, die Schaltelemente derart anzusteuern, dass im Traktionsbetrieb die Induktivitäten parallel geschaltet sind und der Stromfluss durch die Induktivitäten gleichsinnig ist und im Ladebetrieb die Induktivitäten parallel geschaltet sind und der Stromfluss durch die mindestens eine Induktivität mit den Schaltelementen gegensinnig zu dem Stromfluss mit den Induktivitäten ohne Schaltelemente ist. Hierdurch heben sich die erzeugten Momente im Ladebetrieb auf bzw. das verbleibende abzustützende Moment wird reduziert.In a further embodiment, the electric machine has a pole pair number greater than 1, wherein the inductances of the pole pairs of a phase are connected, wherein at least one inductance switching elements are assigned, wherein the control device is designed such that the switching elements to control such that in traction the inductors in parallel are switched and the current flow through the inductors in the same direction and in the charging operation, the inductors are connected in parallel and the current flow through the at least one inductance with the switching elements in opposite directions to the current flow with the inductors without switching elements. As a result, the generated moments cancel in the loading mode or the remaining moment to be supported is reduced.
Die Erfindung wird nachfolgend anhand bevorzugter Ausführungsbeispiele näher erläutert. Die Figuren zeigen:
-
1 eine schematische Teildarstellung eines Traktionsnetzes im Ladebetrieb in einer ersten Ausführungsform, -
2 eine schematische Teildarstellung eines Traktionsnetzes im Ladebetrieb in einer zweiten Ausführungsform, -
3 eine schematische Teildarstellung eines Traktionsnetzes in einer dritten Ausführungsform, -
4 eine schematische Darstellung einer Verschaltung der Induktivitäten einer mehrpoligen Elektromaschine -
5 eine schematische Darstellung eines Traktionsnetzes (Stand der Technik), -
6 eine schematische Darstellung eines Hochsetztellers (Stand der Technik), -
7 eine schematische Darstellung einer Verschaltung der Induktivitäten einer mehrpoligen Elektromaschine in einer ersten Ausführungsform (Stand der Technik) und -
8 eine schematische Darstellung einer Verschaltung der Induktivitäten einer mehrpoligen Elektromaschine in einer zweiten Ausführungsform (Stand der Technik).
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1 a schematic partial view of a traction network in the loading operation in a first embodiment, -
2 a schematic partial representation of a traction network in the loading operation in a second embodiment, -
3 a schematic partial view of a traction network in a third embodiment, -
4 a schematic representation of an interconnection of the inductances of a multi-pole electric machine -
5 a schematic representation of a traction network (prior art), -
6 a schematic representation of a Hochsetzellers (prior art), -
7 a schematic representation of an interconnection of the inductances of a multi-pole electric machine in a first embodiment (prior art) and -
8th a schematic representation of an interconnection of the inductances of a multi-pole electric machine in a second embodiment (prior art).
Bevor die verschiedenen Ausführungsformen der Erfindung erläutert werden, soll zunächst anhand der
Im Ladebetrieb durch die externe Gleichspannungsquelle kann nun das Steuergerät
In der
In der
In der
Eine solche Ausführungsform ist in
Bevor nun eine weitere Ausführungsform näher erläutert werden soll, soll zunächst eine Verschaltung einer 4-poligen Elektromaschine
Dies kann nun erfindungsgemäß ausgenutzt werden, indem durch geeignete Verschaltung der Strom gegensinnig durch eine zweite Teil-Induktivität im Vergleich zur ersten Teilinduktivität geführt wird, was in
Dabei sind jeder zweiten Teil-Induktivität
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102012014178 A1 [0003]DE 102012014178 A1 [0003]
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DE102017216386.0A DE102017216386B4 (en) | 2017-09-15 | 2017-09-15 | Traction network of a motor vehicle |
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DE102017216386.0A DE102017216386B4 (en) | 2017-09-15 | 2017-09-15 | Traction network of a motor vehicle |
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DE102017216386A1 true DE102017216386A1 (en) | 2019-03-21 |
DE102017216386B4 DE102017216386B4 (en) | 2020-12-31 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP4180261A1 (en) * | 2021-11-15 | 2023-05-17 | Volvo Car Corporation | Method for controlling a drivetrain of an electric vehicle, data processing device, drivetrain and electric vehicle |
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US20110316461A1 (en) * | 2010-06-29 | 2011-12-29 | Ac Propulsion, Inc. | Open Delta Motor Drive With Integrated Recharge |
DE102012014178A1 (en) | 2012-01-31 | 2013-08-01 | Volkswagen Aktiengesellschaft | Device and method for charging at least one traction battery of an electric vehicle |
EP2863528A1 (en) * | 2013-10-16 | 2015-04-22 | Siemens Aktiengesellschaft | Operation of an inverter as a DC/DC-converter |
US20150231978A1 (en) * | 2014-02-14 | 2015-08-20 | Jabil Circuit, Inc. | Charge transfer system |
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2017
- 2017-09-15 DE DE102017216386.0A patent/DE102017216386B4/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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US20110316461A1 (en) * | 2010-06-29 | 2011-12-29 | Ac Propulsion, Inc. | Open Delta Motor Drive With Integrated Recharge |
DE102012014178A1 (en) | 2012-01-31 | 2013-08-01 | Volkswagen Aktiengesellschaft | Device and method for charging at least one traction battery of an electric vehicle |
EP2863528A1 (en) * | 2013-10-16 | 2015-04-22 | Siemens Aktiengesellschaft | Operation of an inverter as a DC/DC-converter |
US20150231978A1 (en) * | 2014-02-14 | 2015-08-20 | Jabil Circuit, Inc. | Charge transfer system |
Cited By (1)
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EP4180261A1 (en) * | 2021-11-15 | 2023-05-17 | Volvo Car Corporation | Method for controlling a drivetrain of an electric vehicle, data processing device, drivetrain and electric vehicle |
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