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Method for increasing permanent-magnet synchronous linear motor dynamic control performance

A permanent magnet synchronous linear and dynamic control technology, applied in motor control, motor generator control, AC motor control, etc., can solve the problems of strong dependence on motor parameters and difficult to meet the high-performance control requirements of servo systems.

Active Publication Date: 2018-05-18
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the dynamic control performance of permanent magnet synchronous linear motors, which solves the problem that the traditional current loop PI regulator has strong dependence on motor parameters and is difficult to meet the high-performance control requirements of servo systems

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  • Method for increasing permanent-magnet synchronous linear motor dynamic control performance
  • Method for increasing permanent-magnet synchronous linear motor dynamic control performance
  • Method for increasing permanent-magnet synchronous linear motor dynamic control performance

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Embodiment Construction

[0113] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0114] A structural block diagram of a permanent magnet synchronous linear motor based on a deadbeat current prediction control system in a method for improving the dynamic control performance of a permanent magnet synchronous linear motor in the present invention is shown in figure 1 , the permanent magnet synchronous linear motor control system based on deadbeat current predictive control includes three parts: position loop, speed loop and current loop. phase current i a i b i c After being measured by the current sensor, the stator current component i in the two-phase stationary coordinate system is obtained by Clarke transformation α i β , i α i β Then the stator current component i in the two-phase rotating coordinate system is obtained by Park transformation d i q . The mover speed V is measured by the grating ruler, and V is r...

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Abstract

The invention discloses a method for increasing permanent-magnet synchronous linear motor dynamic control performance. The method comprises the following steps of firstly, hypothesizing a discrete mathematic model of a permanent-magnet synchronous linear motor control system electric current loop; then, based on the above discrete mathematic model, recursing a predicted value of a state variable in a prediction domain; and finally, using a permanent-magnet synchronous linear motor stator voltage equation in a synchronous rotating coordinate of rotor magnetic field orientation, through controlling and predicting a controller output voltage U(k), making an actual sampling current i(k+1) at a k+1th moment be equal to a target current i<*>(k+1) predicted and acquired at a kth moment and dead-beat control is realized . By using the method of the invention, problems that a traditional electric current loop PI regulator is strongly dependent on motor parameters and is difficult to satisfy a high performance control requirement of a servo system are solved; and a permanent-magnet synchronous linear motor control method based on dead-beat current prediction control is selected so that a current harmonic wave and a torque ripple are reduced and system dynamic performance is increased.

Description

technical field [0001] The invention belongs to the technical field of high-performance servo system transmission, and relates to a method for improving the dynamic control performance of a permanent magnet synchronous linear motor. Background technique [0002] Traditional industrial control realizes the linear transmission link through the transmission form of "rotary motor + ball screw", but the existence of intermediate links will make the transmission characteristics of the system worse. Compared with the traditional linear feed method, the linear motor servo system adopts the linear drive method, which has great advantages in the field of high-speed and high-precision manufacturing. In recent years, permanent magnet synchronous linear motors have been widely valued and recognized in high-speed and high-precision linear motion systems research and develop. [0003] In the field of modern motor control technology, vector control has been widely used. The permanent magn...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P25/064H02P6/28H02P6/10
CPCH02P6/10H02P6/28H02P21/22H02P25/064H02P2207/05
Inventor 尹忠刚白聪杜超刘静钟彦儒
Owner XIAN UNIV OF TECH
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