Control method for sliding mode variable structure of permanent magnet synchronous motor (PMSM) speed regulation system

A permanent magnet synchronous motor, sliding mode variable structure technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem that it is difficult to meet the high performance control requirements, to achieve the improvement of dynamic and static characteristics, The effect of reducing steady-state error and improving dynamic quality

Active Publication Date: 2018-09-14
XI AN JIAOTONG UNIV +1
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Problems solved by technology

However, the permanent magnet synchronous motor is a nonlinear, multivariable, and strongly coupled system. When the internal parameters of the system change or are subject to external disturbances, conventional PID control is difficult to meet the high-performance control requirements.

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  • Control method for sliding mode variable structure of permanent magnet synchronous motor (PMSM) speed regulation system
  • Control method for sliding mode variable structure of permanent magnet synchronous motor (PMSM) speed regulation system
  • Control method for sliding mode variable structure of permanent magnet synchronous motor (PMSM) speed regulation system

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Embodiment Construction

[0024] In order to further illustrate the technical solutions adopted by the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is only suitable for illustrating and explaining the present invention, and does not constitute a limitation to the protection scope of the present invention.

[0025] The control block diagram of a sliding mode variable structure control method for a permanent magnet synchronous motor speed regulation system of the present invention is as follows figure 1 shown. The specific steps are as follows: the speed and position angle information of the permanent magnet synchronous motor is detected by the photoelectric encoder; the speed loop adopts the sliding mode variable structure controller, the input is the speed error, and the output is the current given value; the current loop adopts the PI controller, according to The input c...

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Abstract

The invention discloses a control method for a sliding mode variable structure of a PMSM speed regulation system. According to the method, a sliding mode variable structure controller based on a novelreaching law is used, an integration item of an error signal is introduced into design of a sliding-mode surface, requirement for an acceleration signal in a controlled variable is avoided, and stable-state errors of the system are reduced; a speed-change reaching law is introduced, so that the reaching speed of the system is associated with change of a system quantity of state, and the dynamic quality of the system is improved; and in addition, a continuous function sigmoid(s) is used to replace a sign function sgn(s) in the routine reaching law, and buffeting is reduced further. Compared with a traditional PI control method, the given speed signal can be tracked in a better and rapider way, and higher robustness for the external disturbance of the system is provided.

Description

technical field [0001] The invention relates to a control method for a speed regulation system, in particular to a sliding mode variable structure control method for a speed regulation system of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have been widely used in CNC machine tools, aerospace, industrial robots and other fields due to their small size, high efficiency, large electromagnetic torque, easy maintenance, and convenient control. At present, traditional proportional-integral-derivative (PID) control is widely used in permanent magnet synchronous motor speed control systems. This controller has the advantages of simple control, high reliability, and easy implementation, and can meet the control requirements within a certain range. However, the permanent magnet synchronous motor is a nonlinear, multivariable, and strongly coupled system. When the internal parameters of the system change or are subject to exte...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/0007
Inventor 梅雪松宋哲陶涛许睦旬云强
Owner XI AN JIAOTONG UNIV
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