Control device for rotating electric machine

Patent metadata

Field	Value
Publication number	US-9991833-B2
Application number	US-201615253109-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Apr 12, 2016
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A control device for rotating electric machine, which controls a rotating electric machine as a charging electric generator, using an inverter circuit, the control device including: an energization amount generating unit for generating a first electric generation mode in which an energization amount for a field winding and an energization amount for an armature winding of the rotating electric machine are controlled and the inverter circuit is driven to perform electric generation, and a second electric generation mode in which an energization amount for the field winding is controlled to perform electric generation; and an energization signal generating unit for, on the basis of variation-related information relevant to variation in one of electric generation torque and electric generation current of the rotating electric machine, performing switching between the first electric generation mode and the second electric generation mode, and generating energization signals for the field winding and the armature winding.

First claim

The invention claimed is:

1. A control device for a rotating electric machine that controls the rotating electric machine as a charging electric generator, using an inverter circuit, the control device comprising:
an energization amount generator to generate an energization amount command value for a field winding and an energization amount command value for an armature winding of the rotating electric machine in a first electric generation mode in which an energization amount for the field winding and an energization amount for the armature winding are controlled and the inverter circuit is driven to perform an electric generation, and to generate an energization amount command value for the field winding in a second electric generation mode in which only an energization amount for the field winding is controlled to perform the electric generation; and
an energization signal generator to perform switching between the first electric generation mode and the second electric generation mode based on first variation-related information relevant to variation in at least one of an electric generation torque and an electric generation current of the rotating electric machine, and to generate energization signals for the field winding and the armature winding.

2. The control device for the rotating electric machine according to claim 1 , wherein the first variation-related information is a speed of response to variation of at least one of current or voltage of the armature winding or the field winding.

3. The control device for the rotating electric machine according to claim 2 , wherein the first variation-related information is whether the speed of response to variation of at least one of the current or the voltage of the armature winding or the field winding is relatively slow or relatively fast.

4. The control device for the rotating electric machine according to claim 3 , wherein, in switching between the first electric generation mode and the second electric generation mode, the energization signal is generated to minimize a difference, between a time before the switching and a time after the switching, in at least one of the current or the voltage of the field winding or the armature winding of which the speed of response is slower.

5. The control device for the rotating electric machine according to claims 1 , wherein the energization amount generator includes:
a first energization amount generator to generate the energization amount command value for the armature winding and the energization amount command value for the field winding according to the electric generation torque or the electric generation current in the first electric generation mode; and
a second energization amount generator to generate the energization amount command value for the field winding according to the electric generation torque or the electric generation current in the second electric generation mode.

6. The control device for the rotating electric machine according to claim 5 , wherein the energization amount generator minimizes a difference between the energization amount command value for the field winding outputted from the first energization amount generator, and the energization amount command value for the field winding in the second energization amount generator.

7. The control device for the rotating electric machine according to claim 5 , wherein the energization amount generator further includes a third energization amount generator to generate the energization amount command value of the field winding and the armature winding so as to maximize an efficiency of the electric generation in the first electric generation mode, and
the energization signal generator performs switching between the first energization amount generator and the third energization amount generator in the first electric generation mode.

8. The control device for the rotating electric machine according to claim 7 , wherein
in the first electric generation mode, the energization signal generator performs the switching by changing a ratio between the energization amount command values of the first energization amount generator and the third energization amount generator on the basis of a rotation speed of the rotating electric machine.

9. The control device for the rotating electric machine according to claim 8 , wherein the ratio between the energization amount command values of the first energization amount generator and the third energization amount generator is changed by using a low pass filter.

10. The control device for the rotating electric machine according to claim 5 , wherein each of the first energization amount generator and the second energization amount generator includes a map, and
the map of the first energization amount generator is prescribed so as to minimize a difference between the energization amount command value for the field winding outputted from the map of the first energization amount generator, and the energization amount command value for the field winding outputted from the map of the second energization amount generator.

11. The control device for the rotating electric machine according to claim 5 , wherein the map of the first energization amount generator is composed of:
a map for a first energization amount command value, prescribed so as to generate the energization amount command value for the field winding such that a difference from the energization amount command value for the field winding in the map of the second energization amount generator is minimized;
a map for a second energization amount command value, prescribed so as to maximize an efficiency of the electric generation in the first electric generation mode; and
a map for a third energization amount command value, generated by changing an output ratio so as to gradually switching between the first energization amount command value and the second energization amount command value in accordance with second variation-related information.

12. The control device for the rotating electric machine according to claim 11 , wherein the second variation-related information is a rotation speed of the rotating electric machine.

Assignees

• Mitsubishi Electric Corp

Inventors

• Seki Tomohiro
• Iezawa Masahiro
• Nakamura Ryo
• Hisano Yuya

Classifications

• H02P9/30 Primary

  using semiconductor devices · CPC title

• H02P9/305 Primary

  controlling voltage (H02P9/302 takes precedence) · CPC title

• H02P21/04

  specially adapted for very low speeds · CPC title

• H02P9/48

  Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle (H02P9/04 - H02P9/46 take precedence) · CPC title