Cylindrical permanent magnet linear synchronous motor composite sliding mode speed control method and system

A permanent magnet linear synchronization and speed control technology, applied in control systems, motor control, vector control systems, etc., can solve the problem that the control performance of the system is susceptible to internal parameter changes and external disturbances, etc., to enhance the anti-interference ability, speed up the trend. Close speed, the effect of reducing chattering

Pending Publication Date: 2021-10-29
HUAZHONG UNIV OF SCI & TECH
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Benefits of technology

This patented technology describes a way to make sure your motors run smoothly without getting stuck or causing damage during operation. It suggests adding certain rules based upon specific states variables like current and voltage levels, along with advanced observers such as time series data from sensors attached to each part of the machine's structure. These techniques help keep these systems running at their best level while reducing any issues they may encounter overtime. Overall, this innovative technical solution helps maintain good efficiency and durable equipment under different conditions.

Problems solved by technology

This patented technical solution describes how advanced techniques for controlling multiple variables with an inductor type servo motor (PMLS) may be useful during complicated work conditions involving varying environmental influences like temperature fluctuations and vibrational shock waves. These challenges make it difficult to achieve reliable and efficient operation over long periods without causing issues related to chirp behavior caused by variations between different settings within the machine's operating range.

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  • Cylindrical permanent magnet linear synchronous motor composite sliding mode speed control method and system
  • Cylindrical permanent magnet linear synchronous motor composite sliding mode speed control method and system
  • Cylindrical permanent magnet linear synchronous motor composite sliding mode speed control method and system

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[0074] 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 conflicts with each other.

[0075] Such as figure 1 As shown, the present invention provides a compound sliding mode speed control method for a cylindrical permanent magnet linear synchronous motor, comprising:

[0076] Based on the collected mover position angle θ of the cylindrical permanent magnet linear synchronous motor, the coordinate transformation of the three-phase current is carried out to obtain the equivalent curr

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Abstract

The invention discloses a composite sliding mode speed control method and system for a cylindrical permanent magnet linear synchronous motor, and belongs to the technical field of motor control. A terminal attractor is introduced on the basis of an exponential reaching law, and a new sliding mode reaching law is provided. Based on the reaching law, a sliding mode speed controller of the cylindrical permanent magnet linear synchronous motor is established, the convergence speed of the system state can be increased, and the chattering phenomenon can be effectively restrained. Meanwhile, an extended sliding mode disturbance observer is designed and used for estimating system lumped disturbance and providing feedforward compensation for a speed controller, and a composite sliding mode speed control strategy is formed. The cylindrical permanent magnet linear synchronous motor adopts a double-closed-loop control strategy of composite sliding mode speed control and current PI control based on a reaching law and an extended sliding mode disturbance observer. According to the method, the dynamic response speed of the system is increased, the anti-interference capability and robustness of the system are enhanced, and the operation performance and reliability of the motor in a complex working environment are improved.

Description

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Claims

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Application Information

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Owner HUAZHONG UNIV OF SCI & TECH
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