The accuracy of current sensors is most crucial for the performance of an interior permanent magnet synchronous motor (IPMSM) drive. However, it may have sampling errors that are unavoidable for an actual drive. Therefore, to cope with this problem, in this article, a self-calibration strategy for phase-current sensors is proposed by utilizing the proposed topology and the correlation among the multiple current values obtained by current sampling values during one single pulsewidth modulation cycle, making minor changes for the cablings of the conventional current sensors in the premise of not affecting the normal operation of the drive, and abandoning complex observers or filters for easing the computational burden. Besides, its effectiveness was verified by the experimental results on a 5-kW IPMSM motor prototype, which showed that such sampling errors could be well estimated and eliminated.

中文翻译：

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通过在单个 PWM 周期中对电流值进行多点采样，对具有采样误差的相电流传感器进行自校准

电流传感器的精度对于内置永磁同步电机 (IPMSM) 驱动器的性能至关重要。但是，它可能存在实际驱动器不可避免的采样错误。因此，针对这一问题，本文提出了一种相电流传感器的自校准策略，利用所提出的拓扑结构以及单个脉宽调制周期内电流采样值获得的多个电流值之间的相关性，使得在不影响驱动器正常运行的前提下，对传统电流传感器的布线进行了微小的改动，并放弃了复杂的观测器或滤波器，以减轻计算负担。此外，在 5 kW IPMSM 电机原型上的实验结果验证了其有效性，