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A permanent magnet synchronous motor power compensation control system and method

A permanent magnet synchronous motor, power compensation technology, applied in the control system, vector control system, motor generator control and other directions, can solve the problem of deviation between torque value and target torque value, improve torque control accuracy and solve hardware consistency bad effect

Active Publication Date: 2018-05-01
ZHENGZHOU YUTONG BUS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a permanent magnet synchronous motor power compensation control system and method to solve the problem that there is a deviation between the actual motor torque value and the target torque value in the existing permanent magnet synchronous motor control

Method used

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  • A permanent magnet synchronous motor power compensation control system and method
  • A permanent magnet synchronous motor power compensation control system and method
  • A permanent magnet synchronous motor power compensation control system and method

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Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Embodiment of a permanent magnet synchronous motor power compensation control system of the present invention

[0031] The invention is realized by adding a power compensation adjustment branch in the existing permanent magnet synchronous motor power control system, compensating the original reference current, and using the compensated current as a reference signal to realize control of the motor. The specific structure is as Figure 4 As shown, the control system includes the main control branch of the motor, the current feedback branch, the speed feedback branch and the power compensation adjustment branch, the power compensation adjustment branch, the current feedback branch and the speed feedback branch and the motor main control branch form feedback control.

[0032] The power compensation adjustment branch includes an electrom...

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Abstract

The invention relates to a permanent magnet synchronous motor power compensation control system and method, belonging to the technical field of permanent magnet synchronous motor control. In the present invention, by adding a power compensation adjustment branch in the existing control system, it is used to compensate the reference current calculated under a given torque, and use the compensated reference current to perform closed-loop control on the permanent magnet synchronous motor. The compensation signal is It is determined by the difference between the motor reference electromagnetic power P* and the motor feedback electromagnetic power P, where the motor reference electromagnetic power P* is calculated based on the given torque and the actual speed of the motor, and the motor feedback electromagnetic power P is calculated according to the motor vector control process Calculated from the collected current. The present invention achieves the purpose of tracking the reference power ratio of the actual power ratio of the motor through the compensation of the reference current, so that the actual power of the motor completely obeys the target power and improves the torque control accuracy; it effectively solves the problem of torque control caused by poor consistency of the motor and controller hardware difference.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor power compensation control system and method, belonging to the technical field of permanent magnet synchronous motor control. Background technique [0002] The existing permanent magnet synchronous motor control methods are all vector control. The motor model is established, and the target current value is tracked through current closed-loop feedback adjustment. Through the calibration test of the motor, each speed is calculated in the form of a given torque. Under the corresponding synthesis I s and power angle, calculate the d and q axis currents as the target value of the system control according to the motor model, and calculate the space vector U through the current loop closed-loop adjustment and the voltage formula of the motor model d , U q value, and then use the SVPWM algorithm as the core to calculate the output three-phase duty cycle to achieve the purpose of variable voltage a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
Inventor 丁计飞郑维杨泗鹏张广利康娟韩光辉靳超乔理想岳建王浩陈勇刚段喜伟刘朝辉
Owner ZHENGZHOU YUTONG BUS CO LTD
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