摘要
永磁同步电机(PMSM)作为可调速电机的一种,对电压暂降十分敏感,尤其当驱动过程对电机转速和转矩要求严格的时候。本文简要论述了变频调速永磁同步电机的基本原理,分析了电压暂降对变频调速永磁同步电机的影响机理,并利用MATLAB/Simulink搭建了仿真模型进行验证;制定了实验研究方案,选取3种品牌变频器作为PMSM的驱动设备,考察不同变频器驱动下电机转速和定子电流的变化情况。结果表明,电压暂降会造成变频调速永磁同步电机短时间内失去同步速,并使得定子电流经历类似转速变化的过程;不同变频器驱动对电机运行性能的影响差异十分明显,电机转速下降最大值可达30%额定转速以上,对电机运行的稳定性带来极大挑战。
As a kind of adjustable speed motor,PMSM is very sensitive to voltage sags,especially when the driving process is strict with the speed and torque of motor.In this paper,the basic principle of variable-frequency adjustablespeed PMSM is briefly introduced.The influence mechanism of voltage sag on variable-frequency adjustable-speed PMSM is analyzed,and a simulation model is built with MATLAB/Simulink to verify it.An experimental research platform is developed.Three domestic and foreign brands of variablefrequency drives are selected as the driving equipment of PWSM,and the change of speed and stator current of PMSM under different variable-frequency drives are researched.The results show that the voltage sag will cause variable-frequency adjustable-speed PMSM to lose synchronism within a short period,and make the stator current go through a change process similar to the motor speed.The effects on the operating performance of motor under different variable-frequency drives is significantly different,and the motor speed decreases by a maximum of 30% of the rated speed,which brought great challenges to the operation stability of motor.
作者
汪坤
李晨懿
卢文清
徐永海
WANG Kun;LI Chenyi;LU Wenqing;XU Yonghai(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 1029.06,China)
出处
《现代电力》
北大核心
2019年第1期88-94,共7页
Modern Electric Power
基金
国家自然科学基金资助项目(51277069)
关键词
永磁同步电机
变频驱动
电压暂降
仿真及实验研究
电机运行性能
PMSM
variable frequency drive
voltage sags
simulation and experimental research
operating performance of motor
