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A speed control method and system for a permanent magnet vernier linear motor

A technology of linear motor and speed control, applied in control system, vector control system, motor generator control, etc., can solve the problem of low control precision of linear motor system

Active Publication Date: 2020-12-29
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0007] Aiming at the defects of the prior art, the object of the present invention is to provide a permanent magnet vernier linear motor speed control method and system, aiming to solve the problem of traditional PID controllers for linear motor systems with multivariable and time-varying nonlinear characteristics. The problem of low control accuracy

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  • A speed control method and system for a permanent magnet vernier linear motor
  • A speed control method and system for a permanent magnet vernier linear motor
  • A speed control method and system for a permanent magnet vernier linear motor

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Embodiment Construction

[0078] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0079] Such as figure 1 As shown, the present invention provides a permanent magnet vernier linear motor speed control system, including: a main circuit power module 10 and a control module 20;

[0080] In the working state, the input end of the main circuit power module 10 is connected to the output end of the control module 20, and its output end is connected to the permanent magnet vernier linear motor 30; the input end of the control module 20 is connected to the output end of the permanent magnet vernier linear motor 30;

[0081] The main circuit power module 10 is used to adjust the on-of...

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Abstract

The invention discloses a speed control method and system for a permanent magnet vernier linear motor. The method comprises the steps of: adjusting the control gain of a sliding mode speed controllerby employing speed tracking errors to obtain a q-axis preset current; according to the difference of the speed observation value of the motor and the actual speed of the motor and the current q-axis preset current, obtaining a disturbance observation value, and employing the disturbance observation value to update the q-axis preset current; obtaining a q-axis voltage command according to the difference between the q-axis preset current and the q-axis actual current through a transfer function of a current VPI (vector proportional and integral) controller; converting the voltage command to switching signals of an IGBT in an inverter, wherein the calculation of the q-axis preset current employs a sliding mode speed controller, and the obtaining of the disturbance observation value employs anexpansion state observation value; and obtaining a q-axis voltage command by employing the current VPI controller. The method improves the robustness, the accuracy and the dynamic response of the speed control system of the linear motor.

Description

technical field [0001] The invention belongs to the field of motor servo and control, and more specifically relates to a speed control method and system of a permanent magnet vernier linear motor. Background technique [0002] With the rapid development of a series of advanced processing and manufacturing technologies such as ultra-high-speed cutting, ultra-precision machining, and multi-axis linkage, mechanical processing has higher and higher performance requirements for machine tools. The traditional machine tool adopts the rotary motor-ball screw transmission mode in the transmission mode. Due to the influence of length limitation, mechanical friction, equipment wear and other aspects, this transmission mode is not ideal in terms of dynamic characteristics and steady-state characteristics of motion control. . In contrast, linear motors have the characteristics of high-speed dynamic response performance, high positioning accuracy, unrestricted stroke length, and low nois...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/14H02P25/06
CPCH02P21/0007H02P21/13H02P21/14H02P25/06
Inventor 孔武斌陈智曲荣海
Owner HUAZHONG UNIV OF SCI & TECH
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