The conventional phase current reconstruction strategies utilize a dc bus current sensor to reproduce the three-phase currents during phase current sensor faults. However, no current sensor is guaranteed to be healthy in an actual drive. It means that the only survived current sensor may not be accidentally located at the dc bus side, and it can also be at the phase side. In addition, previous studies focus on a particular inverter topology for current reconstruction, whose fault-tolerant capability is threatened when the inverter topology is changed due to malfunctions. This article proposes a survivable interior permanent magnet synchronous motor (IPMSM) drive that realizes the current reconstruction purpose whichever the only survived current sensor is. Besides, inverter topology reconfiguration can be realized by not changing the wirings of the current sensors. Most important of all, the proposed strategy does not affect the normal operations of the drive when no fault occurs. The effectiveness of the proposed strategy is verified by experimental results on a 5-kW IPMSM motor prototype, which shows that the reconstructed phase currents track the actual ones accurately under different failure conditions.

中文翻译：

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带可重新配置逆变器的全电流传感器可生存 IPMSM 驱动器


传统的相电流重建策略利用直流母线电流传感器来再现相电流传感器故障期间的三相电流。然而，没有任何电流传感器能够保证在实际驱动中是健康的。这意味着唯一幸存的电流传感器可能不会意外位于直流母线侧，也可能位于相侧。此外，以往的研究主要集中在当前重构的特定逆变器拓扑上，当逆变器拓扑因故障而改变时，其容错能力会受到威胁。本文提出了一种可幸存的内置式永磁同步电机（IPMSM）驱动器，无论唯一幸存的电流传感器是什么，都可以实现电流重建的目的。此外，无需改变电流传感器的接线即可实现逆变器拓扑重构。最重要的是，所提出的策略在没有故障发生时不会影响驱动器的正常运行。该策略的有效性通过 5 kW IPMSM 电机原型的实验结果得到验证，结果表明重构的相电流在不同故障条件下准确地跟踪实际相电流。