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Variable exponential power reaching law sliding mode and PMSM control application thereof

A technology of variable exponent and reaching law, applied in the PMSM control application field of variable exponent power reaching law sliding mode, which can solve problems such as weakening chattering, discontinuous switch control, and reducing the control performance of the motor speed control system

Active Publication Date: 2021-01-29
ZHENGZHOU UNIV
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Problems solved by technology

[0004] However, due to the discontinuous switch control in the sliding mode control, chattering becomes an inherent characteristic of the sliding mode control system, which will reduce the control performance of the motor speed control system to a certain extent. How to weaken the chattering while ensuring the dynamics of the system Performance has important research significance
Commonly used method is based o

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  • Variable exponential power reaching law sliding mode and PMSM control application thereof
  • Variable exponential power reaching law sliding mode and PMSM control application thereof
  • Variable exponential power reaching law sliding mode and PMSM control application thereof

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intervening component at the same time.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present in...

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Abstract

The invention provides a variable exponential power reaching law sliding mode and PMSM control application thereof. A speed deviation between a motor rotating speed given value and a motor rotating speed is input into a sliding mode controller, and the output is carried out to obtain a q-axis current given value; then three-phase alternating currents are collected, and a d-axis current and a q-axis current are obtained through coordinate system conversion; and a d-axis voltage and a q-axis voltage are obtained through conversion, a three-phase inverter is regulated and controlled by using a switching signal obtained through voltage space vector pulse width modulation, and finally, the motor is controlled by using the output quantity of the three-phase inverter. According to the sliding mode controller designed based on the variable exponential power reaching law, the dynamic quality of a controlled system can be improved, the sliding mode controller has higher response speed and smaller overshoot, and the robustness and rapidity of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a PMSM control application of a variable exponent power reaching law sliding mode. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of simple structure, high power density and high efficiency, and has been widely used in high-precision CNC machine tools, robotics, aerospace and other fields. Since the permanent magnet synchronous motor is a complex control object with multiple variables, strong coupling, nonlinearity, and variable parameters, if conventional PID control is used, although it can meet the control requirements within a certain range of accuracy, it depends on the accuracy of the system model. It is easily affected by external disturbances and internal parameter changes, making the system control deviate from the expected goal. [0003] In order to solve the problems of conventional PID control, scholars at...

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Application Information

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IPC IPC(8): H02P21/00H02P25/026H02P27/08
CPCH02P21/0007H02P25/026H02P27/08
Inventor 刘艳红朱亚昌王要强李明辉韩云飞王克文梁军
Owner ZHENGZHOU UNIV
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