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首页> 外文期刊>Electric Power Applications, IET >Control strategies for non-sinusoidal multiphase PMSM drives in faulty modes under constraints on copper losses and peak phase voltage
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Control strategies for non-sinusoidal multiphase PMSM drives in faulty modes under constraints on copper losses and peak phase voltage

机译：在铜损和峰值相电压的约束下，非正弦多相PMSM驱动器在故障模式下的控制策略

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摘要

In the context of future permanent magnet synchronous machines (PMSMs) with a high number of phases (>7) in integrated drives, this study proposes several control strategies when multiphase PMSMs with non-sinusoidal back electromotive forces (back-EMFs) operate in healthy and open-circuit faults. In all operation modes, the considered constraint on current is related to the maximum root mean square current allowable in one phase of the machine. The constraint on voltage limits the maximum peak value of the phase voltage determined by the DC-bus voltage of the converter. When one or two phases are open-circuited, to maximise torque and respect the constraints, new current references obtained by several proposed methods in rotating and natural frames are imposed to the machine. Owing to the non-sinusoidal waveform of back-EMFs and the considered constraints, numerical computations based on analytical formulations are required to obtain maximal torque-speed characteristics, including the flux-weakening operation. The usefulness of the proposed strategies is verified by numerical and experimental results.
机译：在集成驱动器中具有更高相位（> 7）的永磁同步电机（PMSM）的背景下，这项研究提出了几种具有非正弦反电动势（反EMF）的多相永磁同步电机健康运行的控制策略。和开路故障。在所有操作模式下，考虑的电流限制都与电机一相中允许的最大均方根电流有关。电压限制限制了由转换器的直流母线电压确定的相电压的最大峰值。当一相或两相开路时，为了最大程度地提高转矩并遵守约束条件，将通过几种建议的方法在旋转和自然机架中获得的新电流基准施加到电机上。由于反电动势的非正弦波形和所考虑的约束，需要基于解析公式的数值计算来获得最大的转矩-速度特性，包括磁通减弱操作。数值和实验结果验证了所提出策略的有效性。

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