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Ac rotating machine control device

A technology for rotating electrical machines and control devices, which is applied in the direction of AC motor control, control of multiple AC motors, control systems, etc., and can solve problems such as undesired charging and undesired torque

Inactive Publication Date: 2018-08-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the case where a switching element fails and remains on (short-circuit fault) or off (open-circuit fault), it is difficult to perform power conversion in a normal state. unwanted charging

Method used

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  • Ac rotating machine control device
  • Ac rotating machine control device
  • Ac rotating machine control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] The control device 1 (hereinafter simply referred to as the control device 1 ) of the AC rotating electrical machine 2 according to Embodiment 1 will be described with reference to the drawings. figure 1 It is a schematic configuration diagram of the AC rotating electrical machine 2 and the control device 1 according to the present embodiment.

[0025] Assume that the AC rotating electrical machine 2 is a permanent magnet synchronous AC rotating electrical machine having a stator provided with m sets (m is a natural number greater than 2) of n-phase (n is a natural number greater than 2) windings, and Rotor with permanent magnets. The AC rotating electrical machine 2 includes: a stator fixed to a non-rotating member; and a rotor arranged radially inward of the rotor and rotatably supported by the non-rotating member. One stator is provided with m sets of n-phase windings, and one rotor is provided with permanent magnets with single or multiple pole pairs. The rotating...

Embodiment approach 2

[0076] Next, the control device 1 according to Embodiment 2 will be described. The description of the same components as those in Embodiment 1 is omitted. The basic configuration and processing of the AC rotating electrical machine 2 and the control device 1 according to the present embodiment are the same as those of the first embodiment, but the type of failure of the switching element corresponding to the switching control unit 31 and the on-off of the switching element at the time of failure judgment Different types.

[0077] In the present embodiment, the fault on-off control unit 36 ​​is configured to, when the fault detection unit 32 detects an open fault of the switching element on the positive side or a short-circuit fault of the switching element on the negative side, The group of power converters 10 performs fault on-off control that turns off the switching elements on the positive side of each phase and turns on the switching elements on the negative side of each ...

Embodiment approach 3

[0085] Next, the control device 1 according to Embodiment 3 will be described. The description of the same components as those in Embodiment 1 is omitted. The basic configuration and processing of the AC rotating electrical machine 2 and the control device 1 according to the present embodiment are the same as those of the first embodiment, but the type of failure of the switching element corresponding to the switching control unit 31 and the on-off of the switching element at the time of failure judgment Different types.

[0086] In the present embodiment, the fault on-off control unit 36 ​​is configured so that, for the power converters 10 in the same group, when the fault detection unit 32 detects an open fault of the switching element on the positive side and an open fault of the switching element on the negative side Next, for the group of power converters 10 in which a switching element has failed, fault ON / OFF control is executed to turn off the switching element on the...

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PUM

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Abstract

Provided is an AC rotating machine control device capable of on / off-controlling a non-failed set of switching elements in consideration of a state of an AC rotating machine concerning a failed set ofwindings. For a failed set of switching elements, the AC rotating machine control device stops a dq-axis current control and at least turns on the switching element of each phase on the same positiveor negative side as a failed switching element in the case of a short-circuit failure, or turns off the switching element in the case of an open failure. For a non-failed set, the AC rotating machinecontrol device continues the dq-axis current control and varies a d-axis current component in accordance with a state of the AC rotating machine concerning the failed set of windings.

Description

technical field [0001] The present invention relates to a control device for an AC rotating electric machine including a stator provided with multiple sets of polyphase windings and a rotor provided with permanent magnets. Background technique [0002] A power converter (inverter) mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle and connected to an AC rotating electrical machine has a power conversion function that converts DC power supplied from a DC power supply into AC power to drive an AC rotating electrical machine, or Convert the AC power generated by the AC rotating motor into DC power to charge the DC power supply. [0003] In order to realize this power conversion function, power converters generally use switching elements such as MOSFET (Metal Oxide Semiconductor Field Effect Transistor: Metal Oxide Semiconductor Field Effect Transistor) and IGBT (Insulated Gate Bipolar Transistor: Insulated Gate Bipolar Transistor). The power convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/74
CPCH02P25/22H02P21/50H02P25/20
Inventor 西岛良雅榎木圭一渡边益崇村田泰一原田信吾
Owner MITSUBISHI ELECTRIC CORP