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Permanent magnet synchronous motor control method and device based on angular displacement time-delay-free observer

A technology of permanent magnet synchronous motor and control method, which is applied in the fields of motor control, motor generator control, AC motor control, etc.

Inactive Publication Date: 2018-11-23
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the calculation process of the feedback angular displacement, it can be seen that the angular displacement value is delayed by two control cycles from the modulus acquisition to the final pulse width modulation wave output.

Method used

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  • Permanent magnet synchronous motor control method and device based on angular displacement time-delay-free observer
  • Permanent magnet synchronous motor control method and device based on angular displacement time-delay-free observer
  • Permanent magnet synchronous motor control method and device based on angular displacement time-delay-free observer

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Embodiment Construction

[0095] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0096] Example of the present invention comprises the following steps:

[0097] (1) Establish a permanent magnet synchronous motor mathematical model to obtain the d-q voltage command output equation and the motor rotor motion equation. The specific implementation method is as follows:

[0098] The mathematical model of permanent magnet synchronous motor is shown in formula (1):

[0099]

[0100] In the formula: U d , U q is the d-axis and q-axis stator voltage command; L d , L q is the d-axis and q-axis equivalent inductance; R s is the stator resistance; ω e is the electrical angular velocity; is the rotor flux linkage; i d i q Feedback current for d-axis and q-axis stator;

[0101] The motor torque model is shown in formula (2):

[0102]

[0103] In the formula: T e is the electromagnetic torque; P is the number of pole pairs of the motor...

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Abstract

Embodiments of the invention relate to a permanent magnet synchronous motor control method and device based on an angular displacement time-delay-free observer, and aims to improve the position loop response speed of a control system while the angular displacement feedback lag delay generated in a control system angular displacement sampling calculation process is eliminated. According to the angular displacement observation method, an angular displacement observation model is established according to a motion equation of the permanent magnet synchronous motor, and a time-delay-free angular displacement feedback signal is obtained, so that the angular displacement feedback speed of the control system is further improved, and the response capability of the control system is improved.

Description

technical field [0001] The present invention is mainly aimed at the time-delay-free observation method of the angular displacement of the permanent magnet synchronous motor, and is an angular displacement observation method based on the motion equation of the permanent magnet synchronous motor. , to improve the response speed of the position loop of the control system. Background technique [0002] The drive control process of the AC servo system uses a pulse width modulator to control and generate pulse sequence waves with equal amplitudes and unequal pulse widths, which are used to drive the permanent magnet synchronous motor to rotate, control the position command, and calculate the feedback position input position closed loop loop. After the calculation of the proportional link, the speed command value is obtained, enters the speed closed loop for calculation, and then calculates through the proportional integral link, and then obtains the current command value, enters t...

Claims

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Application Information

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IPC IPC(8): H02P6/34H02P21/08H02P21/13H02P21/22H02P25/022
CPCH02P6/34H02P21/08H02P21/13H02P21/22H02P25/024H02P2205/01
Inventor 王磊任齐民张洪鑫张永德
Owner HARBIN UNIV OF SCI & TECH
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