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Method for self-adjusting control parameters of speed ring of permanent magnet synchronous motor based on fractional orders

A technology of permanent magnet synchronous motor and control parameters, which is applied in the direction of motor generator control, electronic commutation motor control, control purpose model/simulation, etc. It can solve the problems of high motor sensitivity and failure to achieve automatic tuning

Active Publication Date: 2013-05-29
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Although the above-mentioned literature gives a basic method of designing controller parameters based on the proposed fractional-order control structure, this method is very sensitive to the parameters and working conditions of the motor, and cannot achieve the effect of automatic tuning.

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  • Method for self-adjusting control parameters of speed ring of permanent magnet synchronous motor based on fractional orders
  • Method for self-adjusting control parameters of speed ring of permanent magnet synchronous motor based on fractional orders
  • Method for self-adjusting control parameters of speed ring of permanent magnet synchronous motor based on fractional orders

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only exemplary and do not constitute a limitation to the present invention.

[0044] figure 1 It is a control block diagram of the permanent magnet synchronous motor AC servo system of the present invention, and its structure mainly includes a permanent magnet synchronous motor, an inverter, a SVPWM, and a controller. i d and i q The current is the current value obtained by performing clark transformation and park transformation operations on the current in the dq coordinate system, which is used as the feedback signal of the current loop controller, and the output v of the current controller d and v q After inverse park transformation, the reference value v of the stator phase voltage in the α and β coordinate system is obtained α and v β ;by v α and v β As well as the electrical rotation angle of t...

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Abstract

The invention discloses a method for self-adjusting control parameters of a speed ring of a permanent magnet synchronous motor based on fractional orders. An integer-order proportional integral (PI) controller in an alternating current servo system of the permanent magnet synchronous motor is replaced by a fractional-order PI controller, parameters of the fractional-order PI controller are automatically adjusted, and the alternating current servo system of the permanent magnet synchronous motor can be controlled. The method specifically comprises the following steps of: firstly, acquiring current and speed signals of the alternating current servo system; secondly, identifying a speed ring controlled object model of a permanent magnet synchronous motor servo system according to the acquired signals, and identifying the parameters of the model; and finally, optimally adjusting the control parameters, and thus obtaining optimal control parameters. According to the method, the original integer-order PI controller is replaced by the fractional-order PI controller, and the parameters of the controller are automatically adjusted; the parameters of the controller are optimized by using a pattern search algorithm; and the adjusted parameters of the controller are high in robust, high in anti-disturbance capacity and high in control accuracy.

Description

technical field [0001] The invention belongs to the technical field of AC servo system control, and in particular relates to a self-tuning method of control parameters of a speed loop of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor has the characteristics of low loss, small size, high efficiency, simple structure and fast response, and has been widely used in industrial control. In the control of permanent magnet synchronous motor, servo control system is a very common control system. High-performance servo control system has become the development trend of contemporary AC servo control, and is widely used in laser processing, robot control, CNC machine tools, special processing beds and other fields that require high control precision. The servo control system is particularly critical in the control of the permanent magnet synchronous motor. [0003] In AC servo system, three-loop control is a commonly used con...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P6/34
Inventor 宋宝郑世祺卢少武凌文锋唐小琦周向东夏亮周彬
Owner HUAZHONG UNIV OF SCI & TECH
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