摘要:为了实现表贴式永磁同步电机静止时转子初始位置的检测,首先建立了表贴式永磁同步电机在电压矢量注入时的数学模型,分析了矢量注入方向的电流响应形式,并对影响位置辨识成功的因素进行了分析。针对传统电压矢量法准确性低、检测周期长和转子旋转的问题,提出采用三轮检测法,第一轮采用顺序法和小幅值电压矢量粗略估计位置,第二轮采用二分法和中幅值电压矢量精确检测位置,第三轮采用大幅值电压矢量准确判断NS极。仿真和实验结果表明,该检测方法可以准确、快速的检测转子位置,并能保持转子静止。 关键词:表贴式永磁同步电机;电压矢量注入;转子初始位置;饱和凸极效应
Abstract: In order to realize the detection of the initial position of the rotor when the surface mounted permanent magnet synchronous motor(SPMSM) is at standstill, the mathematical model of the SPMSM during voltage vector injection was established. The current response form of vector injection direction was analyzed, and the factors affecting the success of location identification were analyzed. In view of the low accuracy, long detection period and rotor rotation of the traditional voltage vector method, a threestep detection method was proposed. The first step used the sequential method and the small amplitude voltage vector to roughly estimate the position. The second step used the dichotomy and the median voltage vector to precisely detect the position, and the third step used the large voltage vector to accurately judge the NS pole. Simulation and experimental results show that the detection method can accurately and quickly detect the rotor position and keep the rotor stationary. Key words: the surface mounted permanent magnet synchronous motor; voltage vector injection; initial position of the rotor; saturated salient effect
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