A deadbeat predictive current control method for permanent magnet synchronous motor

Abstract

The invention discloses a deadbeat predictive current control method of a permanent magnet synchronous motor, aiming at the defects that are easily affected by digital system delay and inductance parameter mismatch when performing deadbeat predictive current control of a permanent magnet synchronous motor, mainly through Observe the load torque and obtain the dynamic proportional coefficient according to the preset dynamic proportional coefficient expression, combine the stator current sampling value of this cycle, the stator current estimated value of the next cycle and the stator current command value through the dynamic proportional coefficient, and The combined value is used as the feedback current in the predictive current controller to perform deadbeat predictive current control, thereby achieving high-performance control of the permanent magnet synchronous motor. The invention solves the difficult problem in the control system affected by digital system delay and inductance parameter disturbance under the premise of maintaining the dynamic response speed of the control system, enhances the transient response performance of the system and improves the robustness of the system.

Description

technical field [0001] The invention relates to the technical field of control of permanent magnet synchronous motors, in particular to a deadbeat prediction current control method of permanent magnet synchronous motors based on dynamic proportional coefficients. Background technique [0002] Permanent magnet synchronous motor has the advantages of high efficiency, high power density, high reliability, simple structure, small size, etc., and with the continuous improvement of the performance of permanent magnet materials in recent years, it is widely used in machining, aerospace, rail transit And other high-performance servo industry. In the existing permanent magnet synchronous motor control technology, we usually use vector control for it, specifically including the double closed-loop control of the speed outer loop and the current loop, in which the design of the current loop determines the dynamic response speed of the permanent magnet synchronous motor control system A...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing methods, to propose a permanent magnet synchronous motor deadbeat current control method based on the dynamic proportional coefficient, and to solve the problems caused by digital problems in the control system under the premise of maintaining the dynamic response speed of the control system. The problem of system delay and the influence of inductance parameter disturbance can enhance the transient response performance of the system and improve the robustness of the system

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