摘要
永磁同步电机(PMSM)因其具有高效率、高功率密度等特点,成为新一代轨道交通牵引系统的发展方向,其中,惰行状态下的电机转子初始位置和频率辨识方法研究是PMSM无位置传感器控制技术的重要组成部分。因此,首先研究了零电压矢量单脉冲法和双脉冲法,当PMSM处于惰行状态时,通过将三相逆变器所有下桥臂短路1个或2个脉冲,根据短路响应电流获取转子初始位置和频率。在此基础上,提出一种零电压矢量脉冲法短路时间的选取方法和零电压矢量复合脉冲法,确保处于不同惰行频率下的PMSM均可以稳定地重新启动。通过Matlab/Simulink仿真及在中车大连电力牵引研发中心有限公司试验中心进行试验,结果表明:处于不同频率下的PMSM,均可以稳定地重新启动,启动时的频率辨识误差小于0.6 Hz,转子位置辨识误差小于5°。
Permanent magnet synchronous motor(PMSM)has become the development direction of the new generation of rail transit traction system due to its characteristics of high efficiency and high power density.Among them,the research on the identification method of the initial position and frequency of the motor rotor in coasting condition is an important part of the position sensorless control technology of PMSM.Therefore,the zero voltage vector single pulse method and double pulse method were firstly studied.When the PMSM was in coasting condition,one or two pulses were short-circuited by all the lower bridge arms of three-phase inverter,and the initial position and frequency of rotor were obtained according to the short-circuit response current.On this basis,a method of short circuit time selection of zero voltage vector pulse method and a zero voltage vector compound pulse method were proposed to ensure that PMSM can stably restart at different coasting frequency.Through Matlab/Simulink simulation and the test conducted in the test center of CRRC Dalian Electric Traction R&D Center Co.,Ltd.,the results show that PMSM under different frequencies can stably restart,the frequency identification error is less than 0.6 Hz,the rotor position identification error is less than 5°.
作者
岳学磊
王雷
田地
许克磊
YUE Xuelei;WANG Lei;TIAN Di;XU Kelei(CRRC Xi’an Yongdian Jietong Electric Co.,Ltd.,Xi’an 710016,Shaanxi,China)
出处
《电气传动》
2023年第12期62-67,73,共7页
Electric Drive
关键词
永磁同步电机
惰行状态
零电压矢量脉冲法
转子初始位置和频率辨识
permanent magnet synchronous motor(PMSM)
coasting condition
zero voltage vector pulse method
initial rotor position and frequency identification
