Flux-weakening control system based on permanent magnet synchronous motor and control method therefor

A permanent magnet synchronous motor and field-weakening control technology, which is applied in the control system, vector control system, motor generator control, etc., can solve problems such as restricting the application range, and achieve the effect of realizing field-weakening control and preventing saturation

Inactive Publication Date: 2010-01-13
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the magnetic field of the permanent magnet synchronous motor is fixed, when it is running above the base speed, it cannot achieve speed regulation by adjusting the magnetic field like an induction motor, so it cannot well meet the requirements of motor control, thus restricting its scope of application

Method used

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  • Flux-weakening control system based on permanent magnet synchronous motor and control method therefor
  • Flux-weakening control system based on permanent magnet synchronous motor and control method therefor

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Embodiment 1

[0019] Such as figure 1 As shown, the field weakening control system based on permanent magnet synchronous motor in this embodiment includes a torque input module 1, a torque-current look-up module 2, a vector control and decoupling module 3, a space vector pulse width modulation and an inverter module 4 , the field weakening control module 5 and the permanent magnet synchronous motor 6; the torque-current look-up module 2 receives the command of the torque input module 1 and outputs the direct axis look-up current Idref and the quadrature axis look-up current Iqref; the weakening control Module 5 receives the direct-axis reference voltage Udref and the quadrature-axis reference voltage Uqref output by the vector control and decoupling module 3, and outputs the direct-axis demagnetization current component IdfW; the direct-axis demagnetization current component IdfW and the direct-axis look-up table current Idref Subtract the direct axis current Id outputted by the permanent m...

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PUM

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Abstract

The invention aims at providing a flux-weakening control system based on a permanent magnet synchronous motor and a control method therefor. The control system comprises a torque input module, a torque-current table look-up module, a vector control and decoupling module, a space vector pulse width modulation and inverter module and the permanent magnet synchronous motor which are sequentially connected with each other; in addition, the permanent magnet synchronous motor also feedbacks current signals into the vector control and decoupling module; the system also includes a flux-weakening control module which is used for receiving straight-axis reference voltage and quadrature-axis reference voltage that are output by the vector control and decoupling module, and outputting straight-axis demagnetized current component into a straight-axis current input circuit of the vector control and decoupling module. The system can effectively avoid the error of a motor controller caused by saturation of an inverter, so as to provide larger surplus capacity for the inverter and lead the inverter to be far away from a saturation area, thus realizing the flux-weakening control for the permanent magnet synchronous motor which is in high speed running, and greatly enlarging the range of speed regulation when the motor runs at high speed.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to the field-weakening control aspect of a permanent-magnet synchronous motor for a hybrid vehicle. Background technique [0002] At present, with the advancement of science and technology and the enhancement of people's awareness of environmental protection, the development of hybrid vehicles is getting faster and faster. Permanent magnet synchronous motors have the advantages of high efficiency and high power density, and are more and more widely used in electric drive systems. . However, since the magnetic field of the permanent magnet synchronous motor is fixed, when it is running above the base speed, it cannot achieve speed regulation by adjusting the magnetic field like an induction motor, so it cannot well meet the requirements of motor control, thus restricting Its scope of application. Contents of the invention [0003] The first purpose of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P21/00H02P27/06
Inventor 王瑛陈立冲宋波
Owner CHERY AUTOMOBILE CO LTD
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