DE102020132571B3 - Active intermediate circuit discharge - Google Patents
Active intermediate circuit discharge Download PDFInfo
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- DE102020132571B3 DE102020132571B3 DE102020132571.1A DE102020132571A DE102020132571B3 DE 102020132571 B3 DE102020132571 B3 DE 102020132571B3 DE 102020132571 A DE102020132571 A DE 102020132571A DE 102020132571 B3 DE102020132571 B3 DE 102020132571B3
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
- B60L15/08—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using pulses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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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
- 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
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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
-
- 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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Inverter Devices (AREA)
Abstract
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur aktiven Entladung eines Hochvolt-Zwischenkreises eines Elektrofahrzeugs.The present invention relates to a method and a device for actively discharging a high-voltage intermediate circuit of an electric vehicle.
Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur aktiven Entladung eines Hochvolt-Zwischenkreises eines Elektrofahrzeugs.The present invention relates to a method and a device for actively discharging a high-voltage intermediate circuit of an electric vehicle.
Aus Sicherheitsgründen ist gefordert, den Zwischenkreis von Elektrofahrzeugen innerhalb weniger Sekunden aktiv auf eine ungefährliche Spannung entladen zu können. Dies kann z. B. in einem Crash-Fall notwendig sein, um die Gefahr eines elektrischen Schlags deutlich zu reduzieren. Dazu wird in zumindest einer Hochvoltkomponente eine aktive Entladung implementiert. Diese entlädt die Energie des HV-Zwischenkreises z. B. über einen Entladewiderstand, welcher aktiv parallel zu der HV-Spannung geschaltet wird. Alternativ wird auch vorgeschlagen, die Halbbrücken des Inverters kurzzuschließen (z.B. gepulst), um die Energie abzubauen.For safety reasons, it is necessary to be able to actively discharge the intermediate circuit of electric vehicles to a harmless voltage within a few seconds. This can e.g. B. in a crash may be necessary to significantly reduce the risk of electric shock. For this purpose, an active discharge is implemented in at least one high-voltage component. This discharges the energy of the HV intermediate circuit, e.g. B. via a discharge resistor, which is actively connected in parallel to the HV voltage. Alternatively, it is also proposed to short-circuit the half-bridges of the inverter (e.g. pulsed) in order to dissipate the energy.
Bei der Variante mit dem passiven Entladewiderstand sind zusätzliche Bauelemente notwendig, welche zusätzliche Kosten und Bauraum zur Folge haben. Des Weiteren muss die aktive Entladung immer separat geprüft bzw. diagnostiziert werden. Das Entladen über den Inverter hat zwar keine zusätzlichen Kosten zur Folge, jedoch ergeben sich aufgrund der geringen Impedanz im Kurzschlusspfad schnell sehr hohe Ströme. Diese Ströme dürfen zu keiner Beschädigung führen, sowie müssen die auftretenden Abschaltspannungen im Pulsbetrieb im zulässigen Bereich bleiben. Dies erhöht die Komplexität der Entladelogik.In the variant with the passive discharge resistor, additional components are required, which result in additional costs and installation space. Furthermore, the active discharge must always be checked and diagnosed separately. Although discharging via the inverter does not result in any additional costs, very high currents quickly result due to the low impedance in the short-circuit path. These currents must not cause any damage, and the switch-off voltages that occur in pulsed operation must remain within the permissible range. This increases the complexity of the discharge logic.
Die
Aus der
Die WO 2012 / 123 847 A2 offenbart eine fremderregte Synchronmaschine mit einem Erregerkreis an der Seite des Rotors, die eine Erregerwicklung und eine Stromversorgung für die Erregerwicklung sowie ein Schaltelement zum Anschließen der Stromversorgung der Erregerwicklung umfasst. Ferner umfasst die Synchronmaschine eine erste statorseitige Primärwicklung und eine erste rotorseitige Sekundärwicklung. Darüber hinaus kann die Synchronmaschine a) einen Abgriff der ersten rotorseitigen Sekundärwicklung umfassen, der mit einem Steuerelement des Schaltelements verbunden ist, oder b) eine zweite rotorseitige Sekundärwicklung, die mit der ersten statorseitigen Primärwicklung gekoppelt und mit einem Steuerelement des Schaltelements verbunden ist.WO 2012/123 847 A2 discloses a separately excited synchronous machine with an excitation circuit on the side of the rotor, which includes an excitation winding and a power supply for the excitation winding and a switching element for connecting the power supply to the excitation winding. Furthermore, the synchronous machine includes a first stator-side primary winding and a first rotor-side secondary winding. In addition, the synchronous machine can include a) a tap of the first secondary winding on the rotor side, which is connected to a control element of the switching element, or b) a second secondary winding on the rotor side, which is coupled to the first primary winding on the stator side and is connected to a control element of the switching element.
Die
Die
Vor diesem Hintergrund hat sich die Erfindung die Aufgabe gestellt, ein Verfahren und eine Vorrichtung zur Verfügung zu stellen, die möglichst wenige zusätzliche Bauelemente erfordert und sicherstellt, dass die auftretenden Entladeströme zu keiner Beschädigung führen und die auftretenden Abschaltspannungen im zulässigen Bereich bleiben.Against this background, the object of the invention is to provide a method and a device that requires as few additional components as possible and ensures that the discharge currents that occur do not cause any damage and that the turn-off voltages that occur remain within the permissible range.
Die Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1 und eine Vorrichtung mit den Merkmalen des Anspruchs 4. Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen, der Beschreibung und den Abbildungen.The object is achieved according to the invention by a method having the features of claim 1 and a device having the features of claim 4. Configurations and developments of the invention result from the dependent claims, the description and the figures.
Die Erfindung schlägt vor, die Erregerwicklung (den Rotor) einer fremderregten Synchronmaschine (FSM) zum Entladen des Zwischenkreises zu verwenden. Dazu wird der Zwischenkreis bei nicht bestromtem Stator über die Erregerwicklung kurzgeschlossen.The invention proposes using the field winding (the rotor) of a separately excited synchronous machine (FSM) to discharge the intermediate circuit. For this purpose, the intermediate circuit is short-circuited via the field winding when the stator is not energized.
Gegenstand der Erfindung ist ein Verfahren zur aktiven Entladung eines Hochvolt-Zwischenkreises (HV-Zwischenkreis) eines Elektrofahrzeugs, bei dem der Hochvolt-Zwischenkreis über eine Erregerwicklung des Rotors einer fremderregten Synchronmaschine (FSM) bei nicht bestromtem Stator der FSM kurzgeschlossen wird.The invention relates to a method for actively discharging a high-voltage intermediate circuit (HV intermediate circuit) of an electric vehicle, in which the high-voltage intermediate circuit is short-circuited via an excitation winding of the rotor of a separately excited synchronous machine (FSM) when the stator of the FSM is not energized.
In einem alternativen Verfahren zur aktiven Entladung eines Hochvolt-Zwischenkreises (HV-Zwischenkreis) eines Elektrofahrzeugs wird der Hochvolt-Zwischenkreis durch Kurzschließen einer Halbbrücke einer Erregerschaltung des Rotors einer fremderregten Synchronmaschine (FSM) entladen.In an alternative method for actively discharging a high-voltage intermediate circuit (HV intermediate circuit) of an electric vehicle, the high-voltage intermediate circuit is discharged by short-circuiting a half-bridge of an excitation circuit of the rotor of a separately excited synchronous machine (FSM).
Erfindungsgemäß erfolgt die Entladung des HV-Zwischenkreises durch gepulsten Kurzschluss der Erregerwicklung. Dadurch lässt sich der Entladestrom aktiv über die Pulsdauer und die Pulsfrequenz begrenzen. Erfindungsgemäß ist beim Entladevorgang die Dauer des ersten Pulses größer als die der darauffolgenden Pulse. In einer Ausführungsform beträgt die Dauer des ersten Pulses das Zweifache bis Fünffache der Dauer der nachfolgenden Pulse, beispielsweise das Dreifache. Dies hat den Vorteil, dass der Strom zu Beginn der Entladephase schneller ansteigt. In einer weiteren Ausführungsform wird nach dem ersten Puls ein fixes Puls-Pausen-Verhältnis eingestellt. In einer anderen Ausführungsform wird mit fallender Zwischenkreisspannung das Puls-Pausen-Verhältnis schrittweise vergrößert. Damit ist es möglich, den Entladestrom weitgehend konstant zu halten.According to the invention, the HV intermediate circuit is discharged by means of a pulsed short circuit in the field winding. This allows the discharge current to be actively limited via the pulse duration and the pulse frequency. According to the invention, the duration of the first pulse during the discharging process is greater than that of the subsequent pulses. In one embodiment, the duration of the first pulse is two to five times the duration of the subsequent pulses, for example three times. This has the advantage that the current rises faster at the beginning of the discharge phase. In a further embodiment, a fixed mark-to-space ratio is set after the first pulse. In another embodiment, the mark-to-space ratio is gradually increased as the intermediate circuit voltage falls. This makes it possible to keep the discharge current largely constant.
Gegenstand der Erfindung ist auch eine Vorrichtung zur aktiven Entladung eines Hochvolt-Zwischenkreises (HV-Zwischenkreis) eines Elektrofahrzeugs nach dem erfindungsgemäßen Verfahren. Die Vorrichtung umfasst eine fremderregte Synchronmaschine, deren Rotor mindestens eine Erregerwicklung umfasst, deren Anschlüsse über Schaltelemente mit den Anschlüssen eines Zwischenkreiskondensators des Hochvolt-Zwischenkreises verbunden sind.The invention also relates to a device for actively discharging a high-voltage intermediate circuit (HV intermediate circuit) of an electric vehicle using the method according to the invention. The device includes an externally excited synchronous machine, the rotor of which includes at least one field winding whose connections are connected via switching elements to the connections of an intermediate circuit capacitor of the high-voltage intermediate circuit.
In einer Ausführungsform umfassen die Schaltelemente eine erste und eine zweite Halbbrücke, die jeweils zwei in Reihe geschaltete elektronische Schalter mit jeweils einer zum Schalter parallel geschalteten Diode aufweisen. In einer Ausführungsform sind die elektronischen Schalter Halbleiterschalter, beispielsweise Transistoren wie MOS-FETs oder IGBTs.In one embodiment, the switching elements include a first and a second half-bridge, each of which has two series-connected electronic switches, each with a diode connected in parallel with the switch. In one embodiment, the electronic switches are semiconductor switches, for example transistors such as MOSFETs or IGBTs.
In einer Ausführungsform umfasst die Vorrichtung eine stromgeregelte Ansteuerlogik zur Ansteuerung der elektronischen Schalter. In einer anderen Ausführungsform umfasst die Vorrichtung einen Zweipunktregler zur Ansteuerung der elektronischen Schalter. In einer weiteren Ausführungsform umfasst die Vorrichtung einen Rotorstromsensor, der einen Messwert des aktuellen Entladestroms an die Ansteuerlogik bzw. den Zweipunktregler übermittelt. Ein solcher Rotorstromsensor ist i.d.R. bereits in der FSM vorhanden.In one embodiment, the device includes current-controlled control logic for controlling the electronic switches. In another embodiment, the device includes a two-point controller for controlling the electronic switches. In a further embodiment, the device includes a rotor current sensor, which transmits a measured value of the current discharge current to the control logic or the two-point controller. Such a rotor current sensor is usually already present in the FSM.
Zu den Vorteilen der erfindungsgemäßen Lösung zählt, dass keine zusätzlichen Bauteile notwendig sind und die Impedanz im Kurzschlusspfad im Vergleich zu einem Kurzschluss des Inverters deutlich größer ist, jedoch nicht so groß, dass die geforderten Entladezeiten nicht eingehalten werden können. Die größere Impedanz hat zur Folge, dass der Strom zum einen nicht so schnell ansteigt und aufgrund des Rotorwiderstandes auch begrenzt ist. Somit lassen sich die auftretenden Ströme und Abschaltspannungen deutlich einfacher beherrschen, was die Entladelogik stark vereinfacht.The advantages of the solution according to the invention include the fact that no additional components are required and the impedance in the short-circuit path is significantly higher than in a short-circuit of the inverter, but not so high that the required discharge times cannot be met. The larger impedance means that the current does not rise as quickly and is also limited due to the rotor resistance. This makes it much easier to control the currents and cut-off voltages that occur, which greatly simplifies the discharge logic.
Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und den beiliegenden Zeichnungen.Further advantages and refinements of the invention result from the description and the accompanying drawings.
Es versteht sich, dass die vor anstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.
Die Erfindung ist anhand von Ausführungsformen in den Zeichnungen schematisch dargestellt und wird unter Bezugnahme auf die Zeichnungen weiter beschrieben. Es zeigen:
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1 eine Ausführungsform der erfindungsgemäßen Vorrichtung; -
2 einen beispielhaften Verlauf des Entladestroms und der Zwischenkreisspannung über die Zeit in einer Ausführungsform des erfindungsgemäßen Verfahrens.
-
1 an embodiment of the device according to the invention; -
2 an exemplary course of the discharge current and the intermediate circuit voltage over time in an embodiment of the method according to the invention.
Durch Schalten einer Brückendiagonale (z.B. 21 und 32) baut sich ein Strom in der Erregerwicklung 10 auf und der Zwischenkreiskondensator 40 wird entladen.By switching a bridge diagonal (e.g. 21 and 32), a current builds up in the field winding 10 and the
In dem gezeigten Beispiel wird die Diagonale 21 und 32 mit einem gepulsten Steuersignal 50 angesteuert, um den Entladestrom 60 aktiv zu begrenzen. Der erste Puls ist dabei deutlich länger als die darauffolgenden. Dies hat den Vorteil, dass der Entladestrom 60 zu Beginn der Entladephase schneller ansteigt. Nach dem ersten Puls wird ein pulsweitenmoduliertes (PWM) Steuersignal 50 mit fixem Puls-Pausen-Verhältnis an der Diagonale 21 und 32 angelegt.In the example shown, the
In einer anderen (nicht dargestellten) Ausführungsform des Verfahrens wird mit fallender Zwischenkreisspannung 70 das Puls-Pausen-Verhältnis schrittweise angepasst, um den Entladestrom 60 relativ konstant zu halten. Hierfür werden die Schaltelemente 21, 32 über eine stromgeregelte Ansteuerlogik (nicht dargestellt) oder einen einfachen Zweipunktregler (nicht dargestellt) angesteuert. Der dazu notwendige Rotorstromsensor (nicht dargestellt) ist i.d.R. bereits vorhanden.In another (not shown) embodiment of the method, the mark-to-space ratio is adjusted step-by-step as the
In einer anderen (nicht dargestellten) Ausführungsform des Verfahrens wird der Zwischenkreiskondensator 40 über einen Dauerpuls vollständig entladen. Hierbei ist sicherzustellen, dass der Entladestrom nicht zu stark ansteigt, indem die Kapazität des Zwischenkreiskondensators 40, die Zwischenkreisspannung und die Rotorimpedanz L entsprechend ausgelegt werden.In another (not shown) embodiment of the method, the
BezugszeichenlisteReference List
- 1010
- Erregerwicklungexcitation winding
- 2020
- erste Halbbrückefirst half bridge
- 2121
- elektronischer Schalterelectronic switch
- 2222
- elektronischer Schalterelectronic switch
- 3030
- zweite Halbbrückesecond half bridge
- 3131
- elektronischer Schalterelectronic switch
- 3232
- elektronischer Schalterelectronic switch
- 4040
- Zwischenkreiskondensatorintermediate circuit capacitor
- 5050
- Steuersignal [V]Control signal [V]
- 6060
- Entladestrom [A]discharge current [A]
- 7070
- Zwischenkreisspannung [V]DC link voltage [V]
Claims (7)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102022112558A1 (en) | 2022-05-19 | 2023-11-23 | Audi Aktiengesellschaft | Motor vehicle with a separately excited synchronous machine and method for actively discharging a capacitor in a high-voltage network |
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EP2433830A1 (en) | 2010-09-28 | 2012-03-28 | Brusa Elektronik AG | Method and control for providing electrical energy from a driven alternating current synchronous machine |
EP2712759A2 (en) | 2012-09-28 | 2014-04-02 | LSIS Co., Ltd. | Voltage discharging device of vehicle and voltage discharging method thereof |
DE102018201321A1 (en) | 2018-01-29 | 2019-08-01 | Robert Bosch Gmbh | A method of operating an assembly of an electric machine and a rectifier |
KR20200005281A (en) | 2018-07-06 | 2020-01-15 | 현대자동차주식회사 | System and method for discharging direct current link capacitor of inverter for driving motor |
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2020
- 2020-12-08 DE DE102020132571.1A patent/DE102020132571B3/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2433830A1 (en) | 2010-09-28 | 2012-03-28 | Brusa Elektronik AG | Method and control for providing electrical energy from a driven alternating current synchronous machine |
EP2712759A2 (en) | 2012-09-28 | 2014-04-02 | LSIS Co., Ltd. | Voltage discharging device of vehicle and voltage discharging method thereof |
DE102018201321A1 (en) | 2018-01-29 | 2019-08-01 | Robert Bosch Gmbh | A method of operating an assembly of an electric machine and a rectifier |
KR20200005281A (en) | 2018-07-06 | 2020-01-15 | 현대자동차주식회사 | System and method for discharging direct current link capacitor of inverter for driving motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102022112558A1 (en) | 2022-05-19 | 2023-11-23 | Audi Aktiengesellschaft | Motor vehicle with a separately excited synchronous machine and method for actively discharging a capacitor in a high-voltage network |
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