This paper proposes a method for estimating the initial rotor position for an interior permanent-magnet synchronous motor (IPMSM) using subdivided voltage vectors based on inductance variation. Since the stator inductance of an IPMSM varies depending on the rotor position, the current that flows through the entire IPMSM drive system can be different depending on the rotor position when a voltage vector is applied to the stator winding of the IPMSM. Therefore, the rotor position can be estimated using the differences in the currents. In the conventional method, which uses six voltage vectors to estimate the initial rotor position, the estimated position error is increased in specific regions where the phase angle of the applied voltage vector is remarkably different from that of the N pole of the rotor. This paper presents an advanced method using subdivided voltage vectors to estimate the initial rotor position more precisely in a specific region. The effectiveness of the advanced estimation method is verified by simulation and experimental results.

中文翻译：

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基于电感变化的细分电压矢量估算IPMSM初始转子位置的方法

本文提出了一种基于电感变化的细分电压矢量来估算内部永磁同步电动机（IPMSM）的初始转子位置的方法。由于IPMSM的定子电感会根据转子位置而变化，因此，当将电压矢量施加到IPMSM的定子绕组时，流经整个IPMSM驱动系统的电流会根据转子位置而有所不同。因此，可以使用电流差来估计转子位置。在使用六个电压矢量来估计转子的初始位置的常规方法中，在所施加的电压矢量的相角与转子的N极的相角明显不同的特定区域中，所估计的位置误差会增大。本文提出了一种先进的方法，该方法使用细分的电压矢量来更精确地估计特定区域中的初始转子位置。仿真和实验结果验证了该改进估计方法的有效性。