Self-adaption sliding mode control method for speed regulation of variable-load permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and self-adaptive sliding mode, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., and can solve the problems of system steady-state error and difficult to meet high-precision control

Active Publication Date: 2015-01-21
TIANJIN UNIV
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Although the saturation function method weakens chattering, if the boundary layer width parameter is not properly selected

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  • Self-adaption sliding mode control method for speed regulation of variable-load permanent magnet synchronous motor
  • Self-adaption sliding mode control method for speed regulation of variable-load permanent magnet synchronous motor
  • Self-adaption sliding mode control method for speed regulation of variable-load permanent magnet synchronous motor

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Embodiment Construction

[0080] 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.

[0081] An adaptive sliding mode control method for variable load permanent magnet synchronous motor speed regulation implemented by the present invention comprises the following steps:

[0082] Step (1), collecting the three-phase current i of the permanent magnet synchronous motor a (t), i b (t), i c (t), and perform Clark transformation to convert the three-phase current into the equivalent...

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Abstract

The invention discloses a self-adaption sliding mode control method for speed regulation of a variable-load permanent magnet synchronous motor. According to the method, on the conditions that a speed reference value of the permanent magnet synchronous motor is given and a load changes, second-order finite time disturbance observers are designed respectively for step interference and successive interference, load changes are estimated and compensated for, an absolute value fractional order sliding mode surface is designed, an improved power reaching law method is provided, and a continuous sliding mode controller is designed. A self-adaption sliding mode controller composed of the second-order finite time disturbance observers and the continuous sliding mode controller is used for conducting speed regulation on the permanent magnet synchronous motor to enable the motor to be still capable of running at reference speed after the load changes, and the influences brought by load changes to the rotation speed of the motor are greatly reduced. The self-adaption sliding mode control method inherits good robustness of sliding mode control; meanwhile, the expanded second-order finite time disturbance observers are used for observing step signals, rotation speed fluctuation on the condition that the load changes is reduced, and the driving capacity of the permanent magnet synchronous motor is effectively improved.

Description

technical field [0001] The invention belongs to the field of speed control of permanent magnet synchronous motors, and more specifically relates to an adaptive sliding mode control method for speed regulation of variable load permanent magnet synchronous motors. Background technique [0002] Due to its simple structure, reliable operation, convenient maintenance, high efficiency, no excitation loss and good speed regulation performance, the permanent magnet synchronous motor has a wide range of application prospects in the industrial field, especially in electric vehicles, aerospace and electric tools, etc. . Speed ​​control is one of the important issues in the application of permanent magnet synchronous motors. Because in the application, the permanent magnet synchronous motor often encounters various disturbances, such as load changes, the friction force of the system itself and the operating temperature, etc., which will affect the performance of the permanent magnet sy...

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Application Information

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IPC IPC(8): H02P21/00
Inventor 穆朝絮徐伟贾宏杰孙长银
Owner TIANJIN UNIV
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