Vector screening and duty cycle combined motor model prediction control system and method

A technology of motor model and predictive control, applied in vector control system, control system, motor generator control, etc., can solve the problems of torque ripple and flux linkage

Active Publication Date: 2017-07-07
SOUTHEAST UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method to effectively improve the driving performance of permanent magnet synchronous motors in view of the problems that the existing technology cannot solve the problems of large torque ripple and flux linkage ripple The control system and method of the present invention not only reduce the torque ripple but also reduce the calculation time of the controller by combining the vector fast screening and the duty cycle control

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  • Vector screening and duty cycle combined motor model prediction control system and method
  • Vector screening and duty cycle combined motor model prediction control system and method
  • Vector screening and duty cycle combined motor model prediction control system and method

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0056] Such as figure 1 As shown, a permanent magnet synchronous motor model predictive control system based on the combination of vector fast screening and duty cycle control, including PI controller 1, position feedback module 2, stator current acquisition module 3, current differential equation calculation module 4, PARK inverse transformation module 5, sector judgment module 6, vector fast selection switch table 7, duty cycle calculation module 8, optimal value function module 9 and inverter 10;

[0057] The difference between the speed reference value and the speed feedback value obtained by the position feedback module 2 is made, and the difference is input to the speed PI controller 1; the reference torque value output by the speed PI controller 1 is obtained by the torque PI controller to obtain the quadrature axis reference current val...

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Abstract

The invention discloses a vector screening and duty cycle combined motor model prediction control system and method. The method comprises the steps that a reference voltage vector is acquired according to the idea of no-beat control; the sector of the reference voltage vector is judged through the position angle of the reference voltage vector, and at the same time two effective non-zero voltage vectors are quickly selected; the comparison between the reference voltage vector and two quickly selected effective non-zero voltage vectors is used as a value function; a new value function is provided, and a duty cycle control method is used to calculate the action time of the non-zero voltage vectors; and based on the principle of switching loss minimization, the appropriate zero voltage vector is selected according to the non-zero voltage vectors, and the action time of the zero voltage vector is calculated. The switching state and action time of the non-zero voltage vectors and the switching state and action time of the zero voltage vector are applied on an inverter in turn. The inverter converts the switching state into voltage and outputs the voltage to a permanent magnet synchronous motor to drive a motor to run.

Description

technical field [0001] The invention relates to a model predictive control system and method of a permanent magnet synchronous motor based on the combination of vector fast screening and duty cycle control, which belongs to the motor drive and control technology. Background technique [0002] With the rapid development of power electronics technology, microcomputer technology and motor control technology, the permanent magnet synchronous motor has made great progress in control technology, and is currently developing towards the trend of high precision, low cost and miniaturization. The permanent magnet synchronous motor, as the core executive component, has been widely used in the fields of machine tools, household appliances, ships, elevators, robots and electric vehicles. Although various control technologies for permanent magnet synchronous motors have been proposed and widely studied, such as vector control, direct torque control, sliding mode control and fuzzy control,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/28H02P21/18H02P21/20H02P27/12H02P6/10
CPCH02P6/10H02P27/12
Inventor 花为殷芳博黄文涛丁石川
Owner SOUTHEAST UNIV
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