Research on an Improved Method for Permanent Magnet Synchronous Motor

Yingpei Liu,Tao Gao,Guo Li

doi:10.1155/2014/816421

Abstract

In permanent magnet synchronous motor (PMSM) traditional vector control system, PI regulator is used in the speed loop, but it has some defects. An improved method of PMSM vector control is proposed in the paper. The active-disturbance rejection control (ADRC) speed regulator is designed with the input signals of given speed and real speed and the output of given stator currentqcoordinate component. Then, in order to optimize ADRC controller, the least squares support vector machines (LSSVM) optimal regression model is derived and successfully embedded in the ADRC controller. ADRC observation precision and dynamic response of the system are improved. The load disturbance effect on the system is reduced to a large extent. The system anti-interference ability is further improved. Finally, the current sensor CSNE151-100 is selected to sample PMSM stator currents. The voltage sensor JLBV1 is used to sample the stator voltage. The rotor speed of PMSM is measured by mechanical speed sensor, the type of which is BENTLY 330500. Experimental platform is constructed to verify the effectiveness of the proposed method.

Highlights

With the advantages of high power density and high efficiency, permanent magnet synchronous motor (PMSM) is widely used in a variety of high performance electric drive fields
In traditional vector control system, PI regulator is adopted in the speed loop
Based on the preliminary research results, an improved method of PMSM control is proposed in the paper

Summary

Introduction

With the advantages of high power density and high efficiency, permanent magnet synchronous motor (PMSM) is widely used in a variety of high performance electric drive fields. PMSM control method has been widely concerned and researched [1–17]. In order to achieve high performance operation, the uncertainties and nonlinear impact on the system must be overcome. In traditional vector control system, PI regulator is adopted in the speed loop. Based on the preliminary research results, an improved method of PMSM control is proposed in the paper. The active-disturbance rejection controller (ADRC) is designed for speed loop. The voltage equation of PMSM is as follows: ud = Rsid + pidLd − ωrLqiq, (1). Uq = Rsiq + piqLq + ωrLdid + ωrψr, where ud, uq are stator voltage d, q coordinate components; id, iq are stator current d, q coordinate components; Rs is stator resistance, Ld, Lq are stator inductance; ωr is rotor speed; ψr is permanent magnet flux linkage; and p is differential operator. Where J is rotational inertia; B is friction coefficient; and TL is the load

Design of ADRC Speed Regulator

Design of LSSVM-ADRC Controller

Simulation and Experiment Results

Conclusion