Fault-Tolerant Control for Non-sinusoidal Seven-phase PMSMs with Similar Copper Losses
Communication avec acte
Abstract
This paper proposes a strategy using new
transformation matrices to calculate new current references when
a non-sinusoidal seven-phase permanent magnet synchronous
machine (PMSM) has an open-circuited phase. The new current
references allow to obtain a smooth torque with similar copper
losses in the remaining healthy phases even when the back
electromotive force (back-EMF) is non-sinusoidal. A real-time
current learning process using an adaptive linear neural network
(Adaline) is applied to extract from measured currents useful
harmonic components in torque generation. It improves torque
quality, especially at high speed, even when standard
proportional-integral (PI) controllers are applied. In addition,
similar copper losses in the remaining phases with the new current
references can avoid overheating of windings. The effectiveness of
the proposed control strategy is validated by numerical results.
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