A Deadbeat Current Predictive Control Method for Permanent Magnet Synchronous Motor Based on Multipurpose Disturbance Observer

Abstract

A multi-purpose disturbance observer-based dead beat current forecast control method of a permanent synchronous motor comprises the following steps of building a dead beat current forecast control mathematical model of the permanent-magnet synchronous power generator; designing a current ring controller according to a dead beat forecast control theory; designing a sliding-mode disturbance observeraccording to a sliding-mode variable-structure control theory, and designing a lyapunov function; and achieving robust current control and position sensorless control by the sliding-mode disturbanceobserver. According to the control method provided by the invention, accurate current adjustment still can be achieved by dead beat current forecast control even if a motor parameter is not matched during installation of a position sensor; and a rotor position can be accurately extracted to achieve position sensorless control when the position sensor is not matched and relatively good estimation of the motor parameter is performed.

Description

technical field [0001] The invention belongs to the field of permanent magnet synchronous motors, in particular to a deadbeat current prediction control method for permanent magnet synchronous motors based on a multipurpose disturbance observer. Background technique [0002] For power converters and motor drives, the internal current loop plays an important role in achieving good performance of the overall control system. In the past few decades, many methods have been studied for high-performance current control, including hysteretic control, sliding mode variable structure control, and predictive control. [0003] The deadbeat predictive control uses the predictive model of the system to calculate the required voltage vector in each sampling cycle, so that the state variable can follow the given value in the next cycle, and then uses the modulator to generate this voltage vector. Deadbeat control has been applied to thirteen-phase inverters, active filters, rectifier powe...

AI Technical Summary

Problems solved by technology

[0004] The traditional deadbeat predictive control is based on an accurate motor model. When the parameters are mismatched, it will cause a steady-state error in the current, and even make the system unstable. The robustness of the system is poor, and even affects the stable operation of the system in severe cases.

Images