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A Method for Measuring Initial Position of Permanent Magnet Synchronous Motor Rotor

A technology of rotor initial position and permanent magnet synchronous motor, which is applied in the control of generator, motor control, motor generator control, etc., can solve problems such as limited motor rotation resistance, and achieve the effect of accurate judgment and improved measurement accuracy.

Active Publication Date: 2020-05-22
HEFEI JUYI POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for measuring the initial position of the rotor of a permanent magnet synchronous motor, overcome the problem that the prior art is limited by the rotation resistance of the motor itself, and improve the measurement accuracy

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  • A Method for Measuring Initial Position of Permanent Magnet Synchronous Motor Rotor

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Embodiment Construction

[0021] The method for measuring the initial position of the rotor of the permanent magnet synchronous motor disclosed by the present invention is to make the d-axis and q-axis components of the magnetic field maintain the motor at a certain speed by passing a fixed value current to the motor and modifying the initial position angle of the rotor set inside the software. Spin at a constant speed. When the motor rotates at a constant speed at a certain speed, the back electromotive force generated by the motor and the resistance that hinders the rotation of the motor are fixed at this time. If the current passed to the motor is a certain value, then you want the motor to maintain this The current angle required by this state, that is, the d-axis and q-axis components are also fixed, and the initial position value used to generate this current angle, that is, the initial position angle of the motor rotor, becomes unique.

[0022] Such as figure 1 As shown, the permanent magnet sy...

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Abstract

The invention discloses a PMSM rotor initial position measuring method comprising the following steps: inputting a constant value current on a motor d-shaft and a q-shaft so as to change the rotor initial position, thus changing a current actual angle, i.e., the current value actually applied to the motor d-shaft and q-shaft, and further controlling motor rotation states; differently, the method changes the rotor initial position, so the current actually applied to the motor q-shaft is not 0, i.e., the rotation driving force is not 0; the method uses the rotation driving force and the motor rotation resistance to enable the motor to enter a dynamic balanced state, thus more accurately determining a rotor initial position angle.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, in particular to a method for measuring the initial position of a permanent magnet synchronous motor rotor. Background technique [0002] The model of the permanent magnet synchronous motor is a multivariable, nonlinear, and strongly coupled system. In order to achieve torque linear control, it is necessary to decouple the torque control parameters. Rotor field oriented control is a commonly used decoupling control method. Field oriented control requires that the position of the rotor magnetic field must be known. [0003] In the trial production stage of product development, the initial position of the rotor magnetic field can be measured by bench calibration. In the mass production stage, the number of products is large, and the repetition efficiency of bench calibration is low. Therefore, it is necessary to find a method to know the initial position of the rotor wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/32H02P25/022
CPCH02P21/32H02P25/024H02P2203/03H02P2207/05
Inventor 刘蕾孙纯哲郗世洪程胜民胡生瑞
Owner HEFEI JUYI POWER SYST CO LTD