A second-order complementary sliding mode speed control method for permanent magnet synchronous motors

A permanent magnet synchronous motor, speed control technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., to achieve high tracking accuracy, improve dynamic and steady-state performance, ensure stability and robustness Effect

Active Publication Date: 2019-07-09
FUZHOU UNIV
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  • Application Information

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Problems solved by technology

So far, the second-order complementary sliding mode control method has not appeared in the field of permanent magnet synchronous motor control

Method used

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  • A second-order complementary sliding mode speed control method for permanent magnet synchronous motors
  • A second-order complementary sliding mode speed control method for permanent magnet synchronous motors
  • A second-order complementary sliding mode speed control method for permanent magnet synchronous motors

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Embodiment Construction

[0032] The technical solution of the present invention will be described in detail below in conjunction with the drawings.

[0033] The second-order complementary sliding mode speed control method of a permanent magnet synchronous motor of the present invention. First, establish a permanent magnet synchronous motor mathematical model; secondly, design a generalized sliding mode surface and a supplementary sliding mode surface to form a pair of complementary sliding mode surfaces; Design a second-order complementary sliding mode control law; finally, use the second-order complementary sliding mode control law to eliminate the chattering phenomenon in sliding mode control; the specific implementation of this method is as follows:

[0034] S1. Establish mathematical model of hidden pole permanent magnet synchronous motor in d-q-o rotating coordinate system:

[0035]

[0036] Where i d , I q , U d , U q Are the coordinate components of the stator current and voltage in the d-q-o rotating...

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Abstract

The invention relates to a second-order complementary sliding mode speed control method for a permanent magnet synchronous motor. The second-order complementary sliding mode speed control method comprises the steps of establishing a permanent magnet synchronous motor mathematical model firstly; secondary, designing a generalized sliding mode surface and a supplementing sliding mode surface to forma pair of complementary sliding mode surfaces; next, designing a second-order complementary sliding mode control law; and finally, eliminating a buffeting phenomenon existing in sliding mode controlbased on the second-order complementary sliding mode control law. The second-order complementary sliding mode speed control method has the two characteristics as follows: firstly, the second-order complementary sliding mode control method is designed comprehensively based on the advantages of the second-order sliding mode control and complementary sliding mode control modes; and secondly, the second-order complementary sliding mode control law is designed, the first-order derivative of a controlled variable comprises discontinuous switching logic, and the controlled variable is the integral ofthe discontinuous switching logic, so that the controlled variable is continuous; and therefore, high-accuracy speed regulation of the permanent magnet synchronous motor system is realized, system "buffeting" is eliminated, and relatively high robustness is achieved.

Description

Technical field [0001] The invention relates to a second-order complementary sliding mode speed control method of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have the advantages of simple structure, high efficiency, high power factor, high power density, high torque-to-current ratio, and low moment of inertia. At the same time, the permanent magnet synchronous motor is a multivariable, strongly coupled nonlinear system. In its control system design, there are many factors such as current coupling, system saturation, parameter perturbation and external disturbance, which directly affect the permanent magnet synchronous motor. System performance. [0003] Sliding Mode Variable Structure Control (SMC) is a nonlinear control method proposed by former Soviet scholars Emeleyanov and Utkin in the 1960s. Because the sliding mode can be designed, it has nothing to do with the controlled system parameters and external disturbances....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P25/022H02P6/34
Inventor 黄宴委谢雨晴陈少斌黄文超
Owner FUZHOU UNIV
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