一种高功率因数无电解电容PMSM的设计与仿真

doi:10.16180/j.cnki.issn1007-7820.2021.12.003

摘要/Abstract

摘要：

永磁同步电机成本低,寿命长,应用广泛。功率因数低、电流畸变率高是无电解电容应用所面临的难题。针对这一问题,文中通过对永磁同步电机功率因数的分析并基于矢量控制算法,提出了一种交轴相位补偿、直轴弱磁控制的策略,并在MATLAB/Simulink环境下搭建仿真模型进行仿真实验。实验发现,在母线电压波动条件下,电机交轴、直轴电流对于波动的给定电流实现了跟随。对比传统矢量控制,文中提出的控制策略消除了电流与电压之间相位差,功率因数达到93.51%。仿真结果表明,相位补偿结合弱磁控制的策略可以有效提高功率因数,降低电机系统对电网的电磁污染。

关键词: 永磁同步电机, 矢量控制, 无电解电容, 高功率因数, 相位补偿, 弱磁控制, 空间矢量脉宽调制, MATLAB

Abstract:

Permanent magnet synchronous motors are widely used because of low cost and long life. Low power factor and high current distortion rate are the major problems in the application of permanent magnet synchronous motors without electrolytic capacitor. In view of the problems above, this study puts forward a strategy of quadrature axis phase compensation and direct axis field weakening control based on the analysis of the power factor of the permanent magnet synchronous motors and the vector control algorithm, and establishes a simulation model in MATLAB/Simulink environment for verification. The simulation results show that under the condition of bus voltage fluctuations, the motor quadrature axis and direct axis current can track the fluctuating given current smoothly. Compared with the traditional vector control, the proposed control strategy eliminates the phase difference between the current and the voltage, and the power factor reaches 93.51%. The simulation results reveal that the phase compensation combined with the field weakening control strategy can effectively improve the power factor and reduce the electromagnetic pollution of the motor system to the power grid.

Key words: permanent magnet synchronous motor, vector control, non-electrolytic capacitor, high power factor, phase compensation, field weakening control, space vector pulse width modulation, MATLAB

中图分类号:

TP273

蒋凯文,金海,许参. 一种高功率因数无电解电容PMSM的设计与仿真[J]. 电子科技, 2021, 34(12): 13-18.

JIANG Kaiwen,JIN Hai,XU Shen. Design and Simulation of High Power Factor PMSM without Electrolytic Capacitor[J]. Electronic Science and Technology, 2021, 34(12): 13-18.

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