The current reconstruction strategies using single current sensor in the motor drives are widely researched. However, the sampled currents do not represent the average values within the modulation period, especially for the asymmetric modulation or asymmetric sampling solutions. This is due to the following two reasons: 1) The detected current values obtained at different sampling points are utilized to calculate the three-phase currents; and 2) the detected instantaneous currents are applied to estimate the average current values. In this letter, the current change rates under different action vectors are estimated to compensate these errors in a three-phase four-switch interior permanent magnet synchronous motor (IPMSM) drive with single current sensor. The effectiveness of the proposed strategy is verified by experimental results on a 5-kW IPMSM motor prototype, which shows that the current reconstruction errors are reduced after compensation.

中文翻译：

---

单电流传感器TPFS IPMSM驱动采样误差分析与补偿

在电机驱动器中使用单个电流传感器的当前重建策略得到了广泛研究。然而，采样电流并不代表调制周期内的平均值，特别是对于非对称调制或非对称采样解决方案。这是由于以下两个原因：1）利用不同采样点的检测电流值来计算三相电流；2) 应用检测到的瞬时电流来估计平均电流值。在这封信中，估计不同动作向量下的电流变化率以补偿具有单个电流传感器的三相四开关内部永磁同步电机 (IPMSM) 驱动器中的这些误差。