Information processing device, information storage device, and control device of rotary electric machine

Patent metadata

Field	Value
Publication number	US-9887656-B2
Application number	US-201515127285-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	Mar 27, 2014
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

A current command value calculating unit ( 174 ) calculates current command values for a rotor winding ( 30 ) and current command values for a stator winding ( 20 ) with respect to a torque command value between a first rotor ( 28 ) and a second rotor ( 18 ) and a torque command value between a stator ( 16 ) and the second rotor ( 18 ) based on an evaluation function representing a total copper loss of the rotor winding ( 30 ) and the stator winding ( 20 ) and using first and second magnetic interference models. The first magnetic interference model represents a relationship of a linkage magnetic flux Φ in of the rotor winding ( 30 ) with respect to a current I in in the rotor winding ( 30 ) and a current I out in the stator winding ( 20 ). The second magnetic interference model represents a relationship of a linkage magnetic flux Φ out of the stator winding ( 20 ) with respect to the current I in , I out .

First claim

The invention claimed is:

1. An information processing device that calculates a current command value based on a torque command value of a rotary electric machine, wherein
the rotary electric machine comprises a first rotor in which a rotor winding is provided, a stator in which a stator winding is provided, and a second rotor that opposes the first rotor and the stator and that is rotatable relative to the first rotor,
a torque acts between the first rotor and the second rotor according to a magnetic flux due to a current in the rotor winding acting on the second rotor, and a torque acts between the stator and the second rotor according to a magnetic flux due to a current in the stator winding acting on the second rotor,
a linkage magnetic flux of the stator winding can be adjusted by the current in the rotor winding and a linkage magnetic flux of the rotor winding can be adjusted by the current in the stator winding,
the information processing device comprises a current command value calculating unit that calculates a current command value for the rotor winding and a current command value for the stator winding with respect to a torque command value between the first rotor and the second rotor and a torque command value between the stator and the second rotor, based on an evaluation function representing a total copper loss of the rotor winding and the stator winding and using a first magnetic interference model and a second magnetic interference model,
the first magnetic interference model represents a relationship of the linkage magnetic flux of the rotor winding with respect to the current in the rotor winding and the current in the stator winding, and
the second magnetic interference model represents a relationship of the linkage magnetic flux of the stator winding with respect to the current in the rotor winding and the current in the stator winding.

2. The information processing device according to claim 1 , wherein
the first magnetic interference model and the second magnetic interference model include model equations related to a magnetomotive force, in which the current in the rotor winding and the current in the stator winding are combined with a setting ratio.

3. The information processing device according to claim 2 , wherein
the setting ratio is 1:C, where C is a coefficient representing a degree of magnetic interference.

4. The information processing device according to claim 2 , wherein
the first magnetic interference model and the second magnetic interference model further include model equations representing a degree of change of the linkage magnetic flux by magnetic saturation.

5. The information processing device according to claim 1 , wherein
the first magnetic interference model and the second magnetic interference model have a model related to a d-axis linkage magnetic flux and a model related to a q-axis linkage magnetic flux.

6. The information processing device according to claim 1 , wherein
the current command value calculating unit calculates the current command value for the rotor winding and the current command value for the stator winding based on the evaluation function and a constraint condition including a condition that a voltage of the rotor winding is less than or equal to a first limit value and a voltage of the stator winding is less than or equal to a second limit value, and using the first magnetic interference model and the second magnetic interference model.

7. The information processing device according to claim 6 , wherein
electric power can be converted between an electricity storage device and the stator winding by a first electric power conversion device,
electric power can be converted between the electricity storage device and the rotor winding by a second electric power conversion device, and
the first limit value and the second limit value are set to values smaller than a voltage of the electricity storage device.

8. The information processing device according to claim 1 , wherein
the current command value calculating unit calculates the current command value for the rotor winding and the current command value for the stator winding based on the evaluation function and a constraint condition including a condition that the current in the rotor winding is less than or equal to a third limit value and the current in the stator winding is less than or equal to a fourth limit value, and using the first magnetic interference model and the second magnetic interference model.

9. The information processing device according to claim 8 , wherein
electric power can be converted between an electricity storage device and the stator winding by a first electric power conversion device,
electric power can be converted between the electricity storage device and the rotor winding by a second electric power conversion device,
the third limit value is set to a value smaller than a capacity of the second electric power conversion device, and
the fourth limit value is set to a value smaller than a capacity of the first electric power conversion device.

10. The information processing device according to claim 1 , wherein
the current command value calculating unit calculates the current command value for the rotor winding and the current command value for the stator winding such that the evaluation function is approximately minimum.

11. An information storage device that stores the current command value for the rotor winding and the current command value for the stator winding calculated by the information processing device according to claim 1 in correspondence to the torque command value between the first rotor and the second rotor and the torque command value between the stator and the second rotor.

12. A control device of a rotary electric machine, that controls the current in the rotor winding and the current in the stator winding based on the current command value for the rotor winding and the current command value for the stator winding calculated by the information processing device according to claim 1 .

Assignees

• Toyota Chuo Kenkyusho Kk
• Toyota Motor Co Ltd
• Aisin Seiki

Inventors

• Hijikata Wataru
• Watanabe Takao
• Tsuchiya Eiji
• Matsumoto Shohei
• Uemura Masahide
• Murakami Akira
• Tohyama Tomoyuki

Classifications

• H02K51/00

  Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K21/16

  having annular armature cores with salient poles (with homopolar co-operation H02K21/20) · CPC title

• H02K7/006

  Structural association of a motor or generator with the drive train of a motor vehicle · CPC title

• H02K1/148

  Sectional cores (H02K1/141 takes precedence) · CPC title