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Fractional integral sliding mode-based speed control method and device for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and integral sliding mode, which is applied in the direction of motor generator control, AC motor control, control of electromechanical transmission, etc.

Inactive Publication Date: 2013-08-07
NANJING INST OF TECH
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method that can realize high-performance speed following control of the motor under the condition of parameter perturbation and load disturbance in the permanent magnet synchronous motor control system, and overcome the large Fractional integral sliding mode based permanent magnet synchronous motor speed control method and device for integral saturation effect caused by initial error or actuator saturation and transient performance degradation

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  • Fractional integral sliding mode-based speed control method and device for permanent magnet synchronous motor
  • Fractional integral sliding mode-based speed control method and device for permanent magnet synchronous motor
  • Fractional integral sliding mode-based speed control method and device for permanent magnet synchronous motor

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0051] Such as figure 1 As shown, the present invention has designed a kind of permanent magnet synchronous motor speed control method based on fractional integral sliding mode, including the following specific steps:

[0052] Step (1): Collect the three-phase current i of the permanent magnet synchronous motor a i b i c , and carry out the Clark transformation to convert to the equivalent current i in the α-β coordinate system a and i β ;

[0053] Step (2): Obtain the actual running speed ω and rotor position θ of the permanent magnet synchronous motor through the position sensor;

[0054] Step (3): According to the motor rotor position θ in step (2), the motor rotor position θ and the equivalent current i in the α-β coordinate system in step (1) a and i β Perform PARK transformation to generate the actual output current value i in the d-q coordinate system ...

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Abstract

The invention discloses a fractional integral sliding mode-based speed control method for a permanent magnet synchronous motor. The fractional integral sliding mode-based speed control method for the permanent magnet synchronous motor comprises the following steps of constructing a fractional integral sliding mode surface S, and designing a fractional integral sliding mode rotary speed controller for performing rotary speed regulation. The invention also discloses a fractional integral sliding mode-based speed control device for the permanent magnet synchronous motor. According to the fractional integral sliding mode-based speed control method for the permanent magnet synchronous motor disclosed by the invention, high-performance speed following control of the motor can be realized under the condition that parameter perturbation and load disturbance exist in a control system for the permanent magnet synchronous motor, and the defect that an integral saturation effect and the transient performance are reduced due to a big initial error or actuator saturation in traditional integral sliding mode control is overcome.

Description

technical field [0001] The invention relates to a method and device for controlling the speed of a permanent magnet synchronous motor based on a fractional-order integral sliding mode, and belongs to the technical field of AC servo motor control. Background technique [0002] Permanent magnet synchronous motors have the advantages of compact structure, high power density, high energy conversion efficiency, wide speed range, light weight, etc., and are widely used in industrial, civil, military and other fields. [0003] Since the permanent magnet synchronous motor is a typical nonlinear, multivariable coupling system, its performance is affected by uncertainties such as external load disturbance, internal parameter changes, unmodeled objects, and nonlinear dynamic characteristics. In order to obtain a good dynamic response, some robust control strategies such as nonlinear control, adaptive control, H ∞ Control, sliding mode control, etc. have been introduced into the resear...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P25/02H02P27/08H02P25/022
Inventor 黄家才
Owner NANJING INST OF TECH
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