Multi-step model forecast control method of linear induction motor

A linear induction motor, model predictive control technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the tedious process of PI parameter setting, inaccurate calculation of magnetic field orientation and thrust, and drastic changes in motor parameters And other issues

Active Publication Date: 2017-02-22
HUAZHONG UNIV OF SCI & TECH +1
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the edge effect, the motor parameters change drastically, which will make the magnetic field orientation and thrust calculation inaccurate
At the same time, the PI parameter setting of the current inner loop is closely related to the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-step model forecast control method of linear induction motor
  • Multi-step model forecast control method of linear induction motor
  • Multi-step model forecast control method of linear induction motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] In order to make the object, technical solution and advantages of the present invention clearer, 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0057] 1. Establish the linear induction motor mathematical model in the αβ coordinate system.

[0058] In order to compensate the edge effect produced by the linear induction motor during operation, the edge effect factor is introduced:

[0059]

[0060] Among them: D is the primary length of the motor; v is the linear speed of the motor; R 2 is the secondary resistance of the motor; L l2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-step model forecast control method of a linear induction motor. The forecast control method comprises the following steps of (1) acquiring a state variable and an angular speed of the linear induction motor; (2) solving an optimal value of an input voltage vector of the motor under a non-constraint condition; (3) judging whether the optimal value conforms to a voltage constraint condition or not, if yes, entering step (5), otherwise entering step (4); (4) updating the optimal value by conforming to the voltage constraint condition as a target; (5) judging whether the optimal value conforms to a current constraint condition or not, if yes, entering step (7), otherwise entering step (6); (6 ) updating the optimal value by conforming to the current constraint condition as a target; and (7) calculating a duty ratio of a three-phase bridge arm according to the optimal value of the input voltage vector of the motor, and sending the duty ratio to an inverter to modulate a working condition of the motor. A multi-step model forecast control algorithm is applied to the linear induction motor, and the running performance of the linear induction motor is improved.

Description

technical field [0001] The invention belongs to the technical field of linear induction motor control, and more specifically relates to a multi-step model predictive control method for a linear induction motor. Background technique [0002] Linear induction motors can directly generate linear mechanical motion without intermediate transmission conversion devices, so they are widely used in industrial production, transportation and other departments. At the same time, due to the advantages of low operating noise, small initial investment, and economical applicability, linear induction motors have been widely used in rail transit in recent years, and they are a promising urban transportation mode. However, due to the special structure of the linear motor, there is an edge effect, which has a great influence on the air gap flux and the excitation inductance. The mathematical model of the motor will become more complex than that of a rotating induction motor. [0003] At prese...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02P21/14H02P21/00
CPCH02P21/0017H02P21/14
Inventor 徐伟邹剑桥刘毅叶才勇智刚
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap