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An Efficient and Robust Open-Phase Fault Diagnosis Scheme for Dual Three-Phase PMSMs Drive Using Axis Transformation | IEEE Journals & Magazine | IEEE Xplore

An Efficient and Robust Open-Phase Fault Diagnosis Scheme for Dual Three-Phase PMSMs Drive Using Axis Transformation


Abstract:

Efficient diagnostic strategies that can be integrated into microcontroller is still important to the industrial equipment, before implementing AI models with edge-comput...Show More

Abstract:

Efficient diagnostic strategies that can be integrated into microcontroller is still important to the industrial equipment, before implementing AI models with edge-computing. At present, the signal-based open-phase faults (OPFs) diagnosis strategy can meet this goal, but it has problems such as multi-threshold and non-stationary processes sensitivity. The current distortion of multi-phase drive after OPFs is more serious, and it is almost impossible to provide intuitive threshold and diagnostic indicators. In this paper, a simple OPFs diagnosis method for dual three-phase permanent magnet motors is presented. The axis transformation is creatively used for OPFs diagnosis. Specifically, the six-phase currents of motor is transformed to 6 reconstructed axis frames, and then the ratio combinations of the axis-currents can be employed to detect and localize OPFs. Importantly, these ratio combinations of axis-currents are independent of motor parameters, speed, and load, they can achieve OPFs diagnosis directly,without being affected by thresholds and operating conditions. Experimental results demonstrate that the proposed strategy can be executed online efficiently and achieve high-precision OPFs diagnosis within 1/4 of the current cycle.
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Date of Publication: 24 January 2025

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