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WO2012072317A1 - Ensemble onduleur et procédé de détection d'un court-circuit de pont dans une branche demi-pont d'un onduleur - Google Patents

Ensemble onduleur et procédé de détection d'un court-circuit de pont dans une branche demi-pont d'un onduleur Download PDF

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Publication number
WO2012072317A1
WO2012072317A1 PCT/EP2011/067321 EP2011067321W WO2012072317A1 WO 2012072317 A1 WO2012072317 A1 WO 2012072317A1 EP 2011067321 W EP2011067321 W EP 2011067321W WO 2012072317 A1 WO2012072317 A1 WO 2012072317A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
bridge
inverter
bridge branch
determined
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
PCT/EP2011/067321
Other languages
German (de)
English (en)
Inventor
Arndt Wagner
Alexander Becker
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.)
Robert Bosch GmbH
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 WO2012072317A1 publication Critical patent/WO2012072317A1/fr
Anticipated expiration legal-status Critical
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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • 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
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • 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 an inverter arrangement and a method for detecting a bridge short-circuit in a half-bridge branch of an inverter.
  • inverters For the drive in hybrid or electric vehicles, as a rule, electrical machines in the form of induction machines are used, which are operated in conjunction with inverters-frequently also referred to as inverters.
  • the electrical machines are operated either in motor or generator mode.
  • the electric machine During engine operation, the electric machine generates a drive torque which, when used in a hybrid vehicle, supports an internal combustion engine, for example in an acceleration phase.
  • generator mode the electric machine generates electrical energy that is stored in an energy storage such as a battery or a super-cab. Operating mode and power of the electrical machine are set via the inverter.
  • Known inverters comprise a series of switching elements with which the individual phases (U, V, W) of the electrical machine are selectively switched to a high supply voltage potential or to a low supply voltage potential.
  • two series-connected switching elements form a half-bridge branch, wherein a first switching element with the high supply voltage potential and a second switching element with the low supply voltage potential are connected.
  • Each phase of the electrical machine is then connected to a respective half-bridge branch.
  • the switching elements are controlled by an external control unit which, depending on the driver's request (acceleration or braking sen) calculates a desired operating point for the electric machine.
  • the inverter is connected to the control unit and receives from it the corresponding operating data or control commands.
  • the invention provides an inverter arrangement with an inverter, in particular a pulse inverter, which comprises at least one half-bridge branch, which comprises a series circuit of two switching elements, wherein a first switching element with a high supply voltage potential and a second switching element connected to a low supply voltage potential is.
  • each half-bridge branch has at least one current sensor which determines a current in the half-bridge branch or a variable characterizing this current.
  • the invention also provides a method for detecting a bridge short circuit in a half-bridge branch of an inverter, the half-bridge branch comprising a series circuit of two switching elements of which a first switching element is connected to a high supply voltage potential and a second switching element is connected to a low supply voltage potential.
  • a current or a variable characterizing this current is determined in the half-bridge branch.
  • a rate of change of current is determined. If the rate of change of current exceeds a predefinable threshold value, a bridge short-circuit is detected in the corresponding half-bridge branch.
  • the determination and evaluation of the currents directly in the half-bridge branches can reliably detect bridge bridging even if the activation is not active, damaged or even the cause of is the bridge short circuit.
  • phase currents are controlled by output signals from current sensors which detect the current in the connection lines between the inverter and the individual phases of the electric machine.
  • current sensors can be replaced by the present invention arranged in the half-bridge branches current sensors, that is, the output signals of the present invention arranged current sensors can be used directly to control the machine currents.
  • an evaluation unit determines the rate of change of current (current gradient) on the basis of the determined current or the determined variable characterizing the current and detects a bridge short-circuit if the current change rate exceeds a predefinable threshold value. It makes use of the fact that when a bridge short-circuit, the current in the half-bridge branch rises much faster than is possible in normal operation of the inverter.
  • the current sensors arranged according to the invention can also be provided in addition to conventional current sensors in the connecting lines between the inverter and the individual phases of the electrical machine and serve as redundancy for them.
  • the current sensors used can be designed, for example, as a current flow converter or as a measuring resistor.
  • the current sensors can also be implemented directly in the semiconductor of the switching elements. Further features and advantages of embodiments of the invention will become apparent from the following description with reference to the accompanying figure, which shows a schematic block diagram of a connected to an electric machine according to the invention inverter assembly.
  • FIG. 1 shows a schematic representation of a three-phase electric machine 1, which may be configured for example as a synchronous, asynchronous or reluctance machine, with a pulse inverter connected thereto 2.
  • the pulse inverter 2 includes switching elements 3a-3f in the form of circuit breakers, which with individual phases U, V, W of the electric machine 1 are connected and the phases U, V, W switch either against a high supply voltage potential T + or a low supply voltage potential T-.
  • the switching elements 3a-3c which are connected to the high supply voltage potential T + are also referred to as "high-side switches” and the switches 3d-3f connected to the low supply voltage potential T- are referred to as "low-side switches” and can be referred to, for example
  • the pulse inverter 2 further comprises a plurality of freewheeling diodes 4a-4f, which are each arranged parallel to one of the switching elements 3a-3f.
  • the switching elements 3a and 3d, 3b and 3e and 3c and 3f each form a half-bridge 10a, 10b and 10f, which are each associated with one of the phases U, V, W of the electric machine 1.
  • the pulse-controlled inverter 2 determines the power and operating mode of the electric machine 1 and is controlled accordingly by a control unit, not shown, which may also be integrated in the inverter 2.
  • the electric machine 1 can be operated either in motor or generator mode.
  • the pulse inverter 2 may also comprise a so-called intermediate circuit capacitor, not shown, which essentially serves to stabilize a voltage of an energy store, that is, for example, a battery voltage. Parallel to the DC link capacitor, it is then possible to example, the electrical system of a vehicle to be connected with an energy storage device in the form of a battery.
  • the electric machine 1 is designed in the illustrated embodiment, three-phase, but may also have fewer or more than three phases. Accordingly, the inverter 2 may also include fewer or more than three half-bridge branches 10.
  • a current sensor 1a or 11b or 1 1c eg implemented in the form of a current flow transducer or a measuring resistor or even in the semiconductor of the switch, which determines the current or at least one current characterizing variable at this point.
  • the determined current values will then be used on the one hand to control the currents in the electric machine 1.
  • the determined currents or the variables characterizing them are also supplied to an evaluation unit 12, which is shown only schematically in FIG.
  • the evaluation unit 12 determines a rate of change of current (di / dt), ie a change in the current intensity over time, for the individual half-bridge branches 10a, 10b, 10c and detects a bridge short-circuit in the corresponding one Half-bridge branches 10a, 10b, 10c, when the rate of change of current exceeds a predetermined threshold.
  • the arrangement of the current sensors 11 a, 11 b and 1 1 c shown in FIG. 1 at the outputs of the high-side switches 3a, 3b and 3c facing away from the positive supply voltage potential T + is merely to be regarded as exemplary.
  • the current sensors 11 a, 1 1 b and 1 1 c may also be arranged at any other locations within the half-bridge branches 10 a and 10 b and 10 c. It is also conceivable to provide more than one current sensor in the half-bridge branches in order to provide additional redundancy in this way.
  • connection lines 12-U, 12-V and 12W between the half-bridge branches 10a and 10b and 10c and the phases U and V or W of the electric machine may optionally be provided additional current sensors, not shown, in order to obtain a higher Security integrity level.
  • the collector-emitter voltage to the switching elements 3a-3f are monitored.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un ensemble onduleur comprenant un onduleur (2) qui comporte au moins une branche demi-pont (10a; 10b; 10c), laquelle présente un montage en série de deux éléments commutateurs (3a, 3d; 3b, 3e; 3c, 3f), un premier élément commutateur (3a; 3b; 3c) étant relié à un potentiel d'alimentation élevé (T+) et un second élément commutateur (3d; 3e; 3f) relié à un potentiel d'alimentation bas (T-), caractérisé en ce que chaque branche demi-pont (10a; 10b; 10c) comporte au moins un capteur de courant (11 a; 11 b; 11 c) qui détecte un courant dans la branche demi-pont (10a; 10b; 10c) ou une grandeur caractérisant ce courant. L'invention concerne également un procédé pour détecter un court-circuit de pont dans une branche demi-pont (10a; 10b; 10c) d'un onduleur, qui consiste à déterminer une vitesse de modification du courant à partir du courant détecté ou de la grandeur détectée et à détecter un court-circuit de pont dans la branche demi-pont (10a; 10b; 10c) lorsque la vitesse de modification du courant dépasse une valeur seuil prédéfinissable.
PCT/EP2011/067321 2010-12-03 2011-10-04 Ensemble onduleur et procédé de détection d'un court-circuit de pont dans une branche demi-pont d'un onduleur Ceased WO2012072317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010062377A DE102010062377A1 (de) 2010-12-03 2010-12-03 Wechselrichteranordnung und Verfahren zum Detektieren eines Brückenkurzschlusses in einem Halbbrückenzweig eines Wechselrichters
DE102010062377.6 2010-12-03

Publications (1)

Publication Number Publication Date
WO2012072317A1 true WO2012072317A1 (fr) 2012-06-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/067321 Ceased WO2012072317A1 (fr) 2010-12-03 2011-10-04 Ensemble onduleur et procédé de détection d'un court-circuit de pont dans une branche demi-pont d'un onduleur

Country Status (2)

Country Link
DE (1) DE102010062377A1 (fr)
WO (1) WO2012072317A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015104842A1 (de) * 2015-03-30 2016-10-06 Robert Bosch Automotive Steering Gmbh Redundantes Strommessverfahren für einen EPS-Wechselrichter
DE102022211580B4 (de) * 2022-11-02 2025-03-20 Zf Friedrichshafen Ag Verfahren zur Ansteuerung von topologischen Schaltern einer Halbbrücke in einem Leistungsmodul eines Inverters
EP4542247A1 (fr) * 2023-10-16 2025-04-23 Mitsubishi Electric R&D Centre Europe B.V. Procédé de surveillance d'un état de dégradation d'une interconnexion électrique dans un ensemble de module de puissance

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834983A2 (fr) * 1996-09-09 1998-04-08 Schneider Electric Sa Dispositif de mesure de courants dans un ondulateur
EP1143604A1 (fr) * 1999-06-29 2001-10-10 Mitsubishi Denki Kabushiki Kaisha Convertisseur de courant
FR2830138A1 (fr) * 2001-09-24 2003-03-28 Schneider Toshiba Inverter Systeme de mesure des courants moteur dans un onduleur de variateur de vitesse
US20030072117A1 (en) * 2001-10-12 2003-04-17 Mitsubishi Denki Kabushiki Kaisha Electric power conversion apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834983A2 (fr) * 1996-09-09 1998-04-08 Schneider Electric Sa Dispositif de mesure de courants dans un ondulateur
EP1143604A1 (fr) * 1999-06-29 2001-10-10 Mitsubishi Denki Kabushiki Kaisha Convertisseur de courant
FR2830138A1 (fr) * 2001-09-24 2003-03-28 Schneider Toshiba Inverter Systeme de mesure des courants moteur dans un onduleur de variateur de vitesse
US20030072117A1 (en) * 2001-10-12 2003-04-17 Mitsubishi Denki Kabushiki Kaisha Electric power conversion apparatus

Also Published As

Publication number Publication date
DE102010062377A1 (de) 2012-06-06

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