Motor speed loop pi control method, system, device and storage medium

A control method and speed loop technology, applied in the control system, motor control, vector control system and other directions, can solve the problems of the motor cycle cannot be guaranteed to be consistent, the calculation rounding error, etc., to ensure the motor speed cycle consistency, improve the speed The effect of controlling precision

Active Publication Date: 2022-05-24
SUZHOU WEICHUANG ELECTRICAL EQUIP TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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, system, device and storage medium
  • Motor speed loop pi control method, system, device and storage medium
  • Motor speed loop pi control method, system, device 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 described clearly and completely below with reference to 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0046] figure 1 is a schematic diagram of the structure of the motor speed loop PI controller in the prior art, such as figure 1 shown, the 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 ...

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Abstract

The present application relates to a motor speed loop PI control method, system, device and computer storage medium. The method includes: performing differential processing on the position angle of the motor rotor shaft to obtain the feedback speed of the motor; performing integral processing on the command speed of the motor to obtain the command angle; according to the motor command speed and the motor feedback speed, obtain the first output part; according to the motor command angle and the motor rotor shaft position angle, obtain the second output part; according to the first output part With the second output section, a torque current command is obtained. The invention improves the rotational speed control precision of the low-line encoder at low speed and ensures the consistency of the rotational speed cycle of the motor.

Description

technical field [0001] The present application relates to the technical field of motor control, and in particular to a motor speed loop PI control method, system, device and storage medium. Background technique [0002] At present, in the vector control system of the AC motor, the speed loop ASR generally adopts the classical PI (proportional integral) control. like figure 1 In the conventional PI control structure shown, the difference between the command speed and the feedback speed outputs the torque current command through the PI regulator. [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, the differential operation must have calculation rounding errors, especially in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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