Control method, device and system of linear permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and control method, which is applied in the direction of control system, vector control system, motor generator control, etc., can solve the problems of weakening the electromagnetic thrust fluctuation of linear permanent magnet synchronous motor and low control precision of the control system, and achieve Avoid the failure of the control algorithm, improve the control accuracy, and reduce the effect of fluctuations
Active Publication Date: 2021-04-23
HUAZHONG UNIV OF SCI & TECH
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[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a control method, device and system for a linear permanent magnet synchronous motor, the purpose of which is to weaken the electromechanical thrust fluctuation in the linear permanent magnet synchronous motor, thereby solving the linear permanent magnet synchronous motor. The technical problem of low control precision of the control system of permanent magnet synchronous motor
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[0039] 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.
[0040] figure 1 Implement the structural block diagram of linear permanent magnet synchronous motor 30 driving systems for the present invention, as figure 1As shown, the control system of the linear permanent magnet synchronous motor 30 mainly includes the main circuit power circuit 10 , the control circuit 20 and the linear permanent magnet synchronous motor 30 . Wherein, the main circuit po...
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The invention discloses a control method, device and system for a linear permanent magnet synchronous motor, and belongs to the field of motor control. The method comprises the steps of: obtaining a post-voltage-compensation signal based on a dead zone compensation module through employing a current VPI controller to output a voltage and a three-phase sampling current; inputting the post-voltage-compensation signal and the three-phase sampling current into a symmetrical component extraction module, and extracting positive and negative sequence voltages and positive and negative sequence currents; determining the positive and negative sequence counter electromotive forces of the motor by a counter electromotive force observation module according to the positive and negative sequence voltages, the positive and negative sequence currents and position information output by a linear grating; calculating positive and negative sequence current reference values under a dq coordinate system by utilizing a positive and negative sequence current reference value calculation module; converting the positive and negative sequence current reference values under the dq coordinate system into a two-phase static alpha-beta coordinate system by using a Park inverse transformation module; and adopting the current VPI controller to control the output current under the two-phase static alpha-beta coordinate system. Electromagnetic thrust fluctuation output by the linear permanent magnet synchronous motor can be reduced, so that the control precision is improved.
Description
technical field [0001] The invention belongs to the field of motor control, and more specifically relates to a control method, device and system for a linear permanent magnet synchronous motor. Background technique [0002] With the rapid development of a series of advanced processing and manufacturing technologies such as ultra-high-speed cutting, ultra-precision machining, and multi-axis linkage, mechanical processing has higher and higher performance requirements for machine tools. Compared with the traditional "rotary motor + ball screw" transmission mode, the linear motor cancels the mechanical mechanism of the motor and the table, so that it can realize the high-speed response of direct drive, reduce the mechanical friction and improve the precision of the machine tool. It has become a trend for high-performance machine tools to be driven by linear motors. [0003] In order to ensure the control accuracy and performance requirements, the control system of linear motor...
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IPC IPC(8): H02P21/22H02P21/13H02P25/064H02P6/182
Inventor 曲荣海陈智孔武斌李大伟
Owner HUAZHONG UNIV OF SCI & TECH