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Method for suppressing pulse of linear motor pushing force system

A linear motor, thrust technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as large torque ripple in the control system

Inactive Publication Date: 2009-01-07
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, factors such as the accuracy of flux linkage detection and the change of stator resistance parameters directly affect the performance of torque control, resulting in large torque ripple in the control system.

Method used

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  • Method for suppressing pulse of linear motor pushing force system
  • Method for suppressing pulse of linear motor pushing force system
  • Method for suppressing pulse of linear motor pushing force system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The linear motor fuzzy sliding mode direct thrust control system (the flow chart is as figure 1 Shown).

[0056] According to the principle of direct thrust control of the linear motor, it is necessary to select an appropriate voltage vector according to the deviation of the thrust and the flux linkage to realize the thrust control of the linear motor. The fuzzy sliding mode direct thrust control process of the present invention includes the following steps:

[0057] (1) Input linear motor parameters: resistance, inductance, given stator flux linkage, given speed, and initial voltage of 300V is applied to the linear motor through a voltage-type inverter.

[0058] (2) Transform the voltage and current from 3-phase to 2-phase coordinates,

[0059] According to the formula, linear motor stator flux linkage ψ s = u s t - R 1 ∫ ...

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Abstract

The invention relates to the field of linear motor control, in particular to a method for restraining the pulsation of a thrust system of a linear motor; the method adopts a sliding mode thrust controller and a magnetic flux controller, the thrust deviation and the magnetic flux deviation are selected as controlled variables, an integral sliding mode surface which is composed of the thrust deviation and the magnetic flux deviation design the sliding mode motion trajectory, thereby a system can move according to the sliding mode trajectory and the output thrust and the magnetic flux can better track specified value, wherein, a fuzzy controller utilizes the fuzzy control method which uses language information and data information to approach any specified continuous function to solve the jitter problem of a sliding mode control system. The method has the advantages that: a direct drive control system of the linear motor has strong coupling property, nonlinear property, multiple variables and unique end effect, the use of the direct thrust control method of the fuzzy sliding mode linear motor with high robust performance can solve the impacts of various factors on the control performance, thereby achieving the purposes of restraining the thrust pulsation of the linear motor and obtaining great dynamic response performance.

Description

Technical field [0001] The invention relates to a linear motor control field, and is suitable for a method for suppressing the pulsation of a linear motor thrust system. Background technique [0002] The linear motor direct drive system formed by the combination of linear motor and modern control technology has incomparable advantages over rotary motor drive systems in some applications. This special form of motion is used in the industrial drive field, transportation industry, magnetic levitation system, and direct drive. Robots, CNC machine tools and AC servo control systems are increasingly widely used, especially with the development of power electronics technology, various new control strategies and the successful development of various high-performance electromagnetic materials, the linear motor is directly driven by the system. The application prospect of is very broad. [0003] Linear motor direct drive replaces the traditional "rotating motor + ball screw" feeding method...

Claims

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Application Information

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IPC IPC(8): H02P25/06H02P21/00H02P21/14
Inventor 崔皆凡杨俊友木刚符月
Owner SHENYANG POLYTECHNIC UNIV
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