Estimation of SRM rotor position based on coordinate transformation
Estimation of SRM rotor position based on coordinate transformation
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DOI：
10.1109/iecon.2013.6699572
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发表时间：
2013-11
期刊：
影响因子：
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通讯作者：
Jun Cai;Qing-Chang Zhong;Z. Deng
中科院分区：
文献类型：
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作者：
Jun Cai;Qing-Chang Zhong;Z. Deng
开关磁阻电机转子位置的准确估计对于无传感器控制至关重要，但仍然是一个巨大的挑战。本文提出了一种新的位置估计方法。所估计的三相电感可以被视为具有固定相位差的矢量，其位于a-b-c静止坐标系中。将a-B-c坐标系旋转一个δ角，可以构造一个新的aδ-Bδ-cδ坐标系。旋转坐标变换后，三个坐标分量的标准值THD均小于5%，可以用其基波分量近似。基于α-β坐标变换原理，估计出空间矢量的同步转角，通过补偿相位差，计算出转子位置。仿真和实验进行了验证。该方法有效地解决了转子初始位置估计的难题，适用于宽转速范围内的轻载条件下的无传感器控制。此外，该方法具有高性能，不需要额外的硬件和存储器，简化了实现。
Accurate rotor position estimation of Switched Reluctance Motor is vital but still a great challenge for sensorless control. In this paper, a new position estimation method is proposed. The estimated three phase inductances can be seen as vectors with fixed phase difference, which are located in the a-b-c stationary coordinate system. Rotating the a-b-c coordinate system with a δ angle, a new aδ-bδ-cδ coordinate system can be constructed. After rotating coordinate transformation, the THD of normative value of the three coordinate components is lower than 5%, which can be approximated by its fundamental component. Based on the α-β coordinate transformation theory, the synchronous rotating angle of the space vector can be estimated, and then the rotor position can be calculated by compensating a phase difference. Simulation and experiments have been done for verification. This method effectively solves the challenges in initial rotor position estimation and is suitable for sensorless control under light load conditions in a wide speed range. In addition, this method possesses high grade performance and does not require additional hardware or memory, which simplifies the implementation.