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Electronic motor-generator system and method for controlling an electric motor-generator

A technology for motors and generators, applied in motor control, AC motor control, single motor speed/torque control, etc., can solve problems such as reduced motor-generator life, permanent magnet demagnetization, and motor performance deterioration

Inactive Publication Date: 2015-08-19
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overheating can demagnetize the permanent magnets, thereby degrading motor performance and reducing motor-generator life

Method used

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  • Electronic motor-generator system and method for controlling an electric motor-generator
  • Electronic motor-generator system and method for controlling an electric motor-generator
  • Electronic motor-generator system and method for controlling an electric motor-generator

Examples

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Embodiment Construction

[0042] Referring now to the drawings, wherein like reference numerals designate corresponding parts throughout the several views, figure 1 A vehicle 10 , such as a car, is schematically shown including a vehicle body 12 , a plurality of wheels 14 operatively coupled to the vehicle body 12 , and a permanent magnet motor-generator 18 for propelling the vehicle 10 . Each wheel 14 is coupled to a tire 16 . Vehicle 10 further includes an accelerator 20 , such as a pedal, operatively coupled to motor-generator 18 via a control system 22 for controlling motor-generator 18 . Control system 22 and motor-generator 18 collectively define a motor-generator system 24 . A user may actuate accelerator 20 to send a torque command input or torque request to motor-generator 18 via control system 22 . As a non-limiting example, a user may depress actuator 20 (such as a pedal) to input a torque command into T CI Sent to the motor-generator 18 via the control system 22 . In response to the tor...

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PUM

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Abstract

A method can be used to control an electric motor-generator in order to avoid demagnetization of the permanent magnets in the electric motor-generator. The method includes the following steps: (a) receiving, via a control module, a torque command input; (b) determining, via the control module, an available torque of the electric motor-generator based, at least in part, on a rotor temperature and a magnitude of an electric current in the stator; (c) determining, via the control module, a torque command based, at least in part, on the available torque and the torque command input; and (d) commanding, via the control module, the electric motor-generator to generate torque in accordance with the torque command in order to avoid demagnetization of the permanent magnets.

Description

technical field [0001] The invention relates to a motor-generator system and a method for controlling a motor-generator to avoid demagnetization of motor-generator permanent magnets. Background technique [0002] Permanent magnet motor-generators convert electrical power into mechanical torque. Some permanent magnet motor-generators may be polyphase internal permanent magnet (IPM) motor-generators that include permanent magnets embedded in a rotor core and aligned longitudinally with the axis of rotation. The stator includes an annular stator core and a plurality of electrical windings. The stator core includes a plurality of radially inwardly projecting tooth elements parallel to the longitudinal axis of the motor-generator and defining an inner perimeter of the stator. Adjacent radially inwardly projecting tooth elements form radially oriented longitudinal channels. The electrical windings are fabricated from strands of a suitable conductive material, such as copper or ...

Claims

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Application Information

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IPC IPC(8): H02P23/00B60L15/00
CPCH02P6/08H02P9/006H02P29/032H02P29/60
Inventor J.张Y.C.孙R.李R.A.苏亚佐泽佩达
Owner GM GLOBAL TECH OPERATIONS LLC