Zero-position correction system and method of PMSM rotor

A technology of permanent magnet synchronous motor and rotor zero position, which is applied in the direction of control system, control generator, vector control system, etc., can solve problems such as troublesome operation, poor versatility, and difficult control of phase current, and achieve troublesome operation, calibration The effect of simple method

Inactive Publication Date: 2015-08-12
XUJI GRP +2
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Problems solved by technology

[0007] The purpose of the present invention is to provide a permanent magnet synchronous motor rotor zero correction system and method to solve the current problems of troublesome operation, poor versatility and difficult control of phase current in the current permanent magnet synchronous motor rotor zero correction

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  • Zero-position correction system and method of PMSM rotor
  • Zero-position correction system and method of PMSM rotor
  • Zero-position correction system and method of PMSM rotor

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Embodiment of a permanent magnet synchronous motor rotor zero position correction system of the present invention

[0028] Such as figure 1 As shown, the permanent magnet synchronous motor rotor zero correction system of the present invention includes a motor control branch, a current feedback branch and an angle feedback branch, and the current feedback branch, the angle feedback branch and the motor control branch constitute a motor current loop control mode, the motor control branch is used to control the permanent magnet synchronous motor according to the q and d axis current control on the stator side of the permanent magnet synchronous motor in the given vector control, and the q axis current on the stator side of the permanent magnet synchronous motor in the given vector control is 0, the d-axis current is within the rated cur...

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Abstract

The invention relates to a zero-position correction system and method of a PMSM rotor, and belongs to the technical field of motor servo control. The q shaft current in a motor control branch is set as 0, the d shaft current is controlled within 1.2 times of rated current, the using angle in given sector control is decreased gradually from 30 to 0 degree, and thus, the PMSM motor is changed from an angle theta to a theoretical zero position; whether the PMSM rotor reaches a final stable position is determined, and the angle when the PMSM rotor is at the final stable position is used as the zero-position correction angle of the rotor; and the rotor angle measured in the process that the correction angle is compensated for motor control is used as the practical rotor angle, and zero-position correction of the rotor is realized. The correction method in the invention is simple and easy to implement, and can effectively solve the problems that operation is complex, the versatility is low and the phase current is not easy to control in zero-position correction of the PMSM rotor in the prior art.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor rotor zero position correction system and method, belonging to the technical field of motor servo control. Background technique [0002] Permanent magnet synchronous motor rotor position sensors are widely used in industrial sites to achieve precise control of motors. The accurate detection of the rotor zero position is a necessary condition for realizing the motor vector control. The motor vector control generally adopts position (speed) and current closed-loop control, and the rotor position needs to be accurately known. [0003] The rotor position sensor generally adopts a resolver or an encoder, and the installation and zero position calibration of the sensor are very difficult and the accuracy is not high. Commonly used rotor zero correction methods include "back electromotive force and sensor signal ratio", "high frequency signal injection", "phase current synthetic magnetic field pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 田素立赵瑞杰邢珊珊李朝锋王艳领代兴华张小伟李军克
Owner XUJI GRP
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