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A Postfault Sensorless Scheme for Modular Multiple Three-Phase Machine Drive
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DOI：10.1109/TIE.2025.3642368.png)
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Abstract
En 中文
Modular multiple three-phase machine (MTPM) can ensure the continuous operation of healthy units after the failure of phase windings or inverters. However, due to the influence of magnetic coupling between different modules, the fault will lead to magnetic field distortion, which dramatically decreases the accuracy of the conventional rotor position observation scheme. Hence, this article proposes a postfault sensorless scheme for modular MTPM considering mutual magnetic coupling between different modules after a fault. In this novel scheme, the problems of bias component and high-frequency noise existing in the prefault observation scheme are further addressed. Meanwhile, the magnetic field distortion caused by magnetic coupling between modules is revealed, and the observation error of sensorless after fault is further reduced by suppressing this magnetic coupling phenomenon. Finally, experimental tests are performed under various operation conditions to verify the effectiveness of the proposed algorithm, it provides a reliable postfault sensorless scheme for the modular MTPM drive system.
Keywords:
DC offset
fault tolerance
improved second-order generalized integrators (ISOGI)
magnetic coupling
modular multiple three-phase machine (MTPM)
sensorless
unbalance
Journal
IF:
7.2
Papers:
1.8W
Citations:
9.8W