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Motor speed loop PI control method and system, equipment and storage medium

A control method and speed loop technology, applied in control systems, motor control, vector control systems, etc., can solve problems such as the inability of motor cycles to be consistent and calculation rounding errors.

Active Publication Date: 2021-04-23
SUZHOU WEICHUANG ELECTRICAL EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the digital control system, there must be calculation rounding errors in the differential operation, especially in the working conditions of low line number encoder or extremely low speed, and the load fluctuates within a certain range, the period of each revolution of the motor cannot be determined. Guaranteed to be consistent

Method used

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  • Motor speed loop PI control method and system, equipment and storage medium
  • Motor speed loop PI control method and system, equipment and storage medium
  • Motor speed loop PI control method and system, equipment and storage medium

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Embodiment Construction

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0046] figure 1 is a structural schematic diagram of the motor speed loop PI controller in the prior art, such as figure 1 As shown, command speed and feedback speed w r The difference of the output torque current command through the PI regulator

[0047]

[0048] Here the coefficient K p is the proportional gain of the motor...

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Abstract

The invention relates to a motor speed loop PI control method and system, equipment and a computer storage medium. The method comprises the following steps: carrying out the differential processing of the position angle of a motor rotor shaft, and obtaining the feedback rotating speed of a motor; performing integral processing on the motor instruction rotating speed to obtain a motor instruction angle; obtaining a first output part according to the motor instruction rotating speed and the motor feedback rotating speed; obtaining a second output part according to the motor instruction angle and the motor rotor shaft position angle; and obtaining a torque current instruction according to the first output part and the second output part. The rotating speed control precision of the low-line-number encoder at a low speed is improved, and the rotating speed period consistency of the motor is ensured.

Description

technical field [0001] The present application relates to the technical field of motor control, in particular to a motor speed loop PI control method, system, device and storage medium. Background technique [0002] At present, in the AC motor vector control system, the speed loop ASR generally adopts the classic PI (proportional integral) control. like figure 1 In the conventional PI control structure shown, the difference between the command speed and the feedback speed passes through the PI regulator to output the torque current command. [0003] In the motor speed closed-loop control, the feedback speed is obtained through the encoder speed measurement link. First, the rotor mechanical angle is obtained according to the encoder feedback signal, and then the motor shaft speed, that is, the motor feedback speed, is obtained through differential operation. In the digital control system, there must be calculation rounding errors in the differential operation, especially in...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/04H02P21/18
CPCH02P21/0003H02P21/04H02P21/18H02P2205/07
Inventor 徐益飞黎国才
Owner SUZHOU WEICHUANG ELECTRICAL EQUIP TECH
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