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A control method for high-power surface permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., and can solve problems such as inaccurate decoupling

Active Publication Date: 2018-03-30
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of inaccurate decoupling caused by motor parameter changes in the traditional permanent magnet synchronous motor control process, the present invention provides a high-power surface-type permanent magnet synchronous motor control method

Method used

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  • A control method for high-power surface permanent magnet synchronous motor
  • A control method for high-power surface permanent magnet synchronous motor
  • A control method for high-power surface permanent magnet synchronous motor

Examples

Experimental program
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Embodiment Construction

[0054] A high-power surface-type permanent magnet synchronous motor control method is realized by adopting the following steps:

[0055] step a runs before step d begins;

[0056] Step b and step c run concurrently with step d after step d starts;

[0057] a. Offline identification process of parameters:

[0058] a1. At the beginning of offline identification, query the temperature resistance comparison table of the stator according to the stator temperature value T of the permanent magnet synchronous motor obtained in real time, and obtain the stator resistance value R s4 ;

[0059] a2. Offline identification process of stator inductance:

[0060] A fixed vector voltage is applied to the permanent magnet synchronous motor, and the voltage is maintained for a certain period of time, thereby positioning the direct axis of the permanent magnet synchronous motor; during the positioning process, the direct axis of the permanent magnet flux linkage of the permanent magnet synchr...

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Abstract

The invention relates to methods for controlling permanent magnet synchronous motors, in particular to a method for controlling high-power surface permanent magnet synchronous motors.By the aid of the method, the problem of inaccurate decoupling due to variation of parameters of motors in the traditional permanent magnet synchronous motor control procedures can be solved.The method for controlling the high-power surface permanent magnet synchronous motors includes steps of a, carrying out parameter offline identification procedures; b, carrying out parameter online identification procedures; c, carrying out parameter calibration procedures; d, carrying out permanent magnet synchronous motor running control procedures.The method has the advantage that the method is applicable to controlling permanent magnet synchronous motors and is particularly applicable to controlling the high-power surface permanent magnet synchronous motors.

Description

technical field [0001] The invention relates to a control method for a permanent magnet synchronous motor, in particular to a control method for a high-power surface type permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in industrial automation due to their advantages of fast response, high power density, low loss, and high efficiency. The traditional control method of permanent magnet synchronous motor mainly adopts double loop (current loop, speed loop) control, and its current loop mainly adopts decoupling control. Practice has shown that the accuracy of the traditional control method depends on the accuracy of the motor parameters because the accuracy of the decoupling, and the motor parameters will change with the change of the working environment during the operation of the motor, so the decoupling will be inaccurate, thus Affects motor control performance. Based on this, it is necessary to invent a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/16
Inventor 张瑞峰詹哲军李学亮张雅琨李昊霍雨翔李晓辉
Owner CHINA RAILWAYS CORPORATION
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