Single‑phase fault diagnosis for five‑phase permanent magnet synchronous motors based on neutral voltage observation

Bing Tian; Runze Lu; Kai Wang

Single‑phase fault diagnosis for five‑phase permanent magnet synchronous motors based on neutral voltage observation

Bing Tian

Runze Lu

Kai Wang

Vol. 23, No. 10, pp. 1461-1472, Oct. 2023

10.1007/s43236-023-00642-y

Five-phase permanent magnet synchronous motor

Fault diagnosis

Neutral voltage

Lock-in amplifier

Abstract

Neutral voltage (NV) reflects the unbalanced condition of a five-phase permanent magnet synchronous motor (PMSM). Thus, it can be used to screen out the open-switch, open-phase, and inter-turn faults of a single phase, with a low rate of misdiagnosis. However, because there is no neutral point lead for most electric drives, the measurement of NV is difficult. To this end, an NV observation method is proposed in this paper by exploiting phase currents and reference pole voltages. This method can be regarded as a kind of multi-sensor information fusion technology. On this basis, a lock-in amplifier technique is further presented to calculate the frequency spectrum from the re-constructed NV, which achieves accurate classification of the stated single-phase faults. Finally, experimental results confirm the validity of the presented method in terms of fast and accurate location determination of open-switch, open-phase, and inter-turn short-circuit faults.

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Cite this article

[IEEE Style]

B. Tian, R. Lu, K. Wang, "Single‑phase fault diagnosis for five‑phase permanent magnet synchronous motors based on neutral voltage observation," Journal of Power Electronics, vol. 23, no. 10, pp. 1461-1472, 2023. DOI: 10.1007/s43236-023-00642-y.

[ACM Style]

Bing Tian, Runze Lu, and Kai Wang. 2023. Single‑phase fault diagnosis for five‑phase permanent magnet synchronous motors based on neutral voltage observation. Journal of Power Electronics, 23, 10, (2023), 1461-1472. DOI: 10.1007/s43236-023-00642-y.