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首页> 外文期刊>Power Electronics, IEEE Transactions on >Control Strategy for Multiphase Drives With Minimum Losses in the Full Torque Operation Range Under Single Open-Phase Fault
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Control Strategy for Multiphase Drives With Minimum Losses in the Full Torque Operation Range Under Single Open-Phase Fault

机译：单相故障下全转矩运行范围内损耗最小的多相驱动器的控制策略

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摘要

Fault tolerance is an advantageous characteristic of multiphase machines when compared with three-phase ones. During open-phase fault, the current references need to be adapted to provide ripple-free torque. As a consequence of this modification, the postfault phase currents might be larger than the rated current. Such a situation leads to overheating, and to preserve the integrity of the system, some limits are set to the postfault phase currents. Two main strategies have been proposed for the postfault situation: maximum torque (MT) and minimum losses (ML). The MT strategy allows us to obtain the widest torque operation range (TOR) in the postfault situation but does not minimize the stator winding losses; conversely, the ML strategy provides the minimum stator winding losses for each torque value, at the expense of reducing the TOR. Thus, the solutions proposed so far do not achieve minimum stator winding losses in the entire (that of the MT strategy) TOR. This paper presents the full-range minimum losses (FRML) postfault control strategy, which minimizes the losses in the whole TOR, for multiphase machines with sinusoidally distributed windings under single open-phase fault. The FRML strategy is evaluated for different types of machines, phase numbers, and winding arrangements. Experimental results are provided.
机译：与三相电机相比，容错是多相电机的一个有利特性。在断相故障期间，需要调整电流基准以提供无脉动的转矩。作为此修改的结果，故障后的相电流可能会大于额定电流。这种情况会导致过热，并且为了保持系统的完整性，对故障后相电流设置了一些限制。针对故障后情况，提出了两种主要策略：最大扭矩（MT）和最小损失（ML）。 MT策略使我们能够在故障后的情况下获得最大的转矩操作范围（TOR），但不会使定子绕组的损耗最小化。相反，ML策略为每个转矩值提供了最小的定子绕组损耗，但以降低TOR为代价。因此，迄今为止提出的解决方案并未在整个（MT策略的）TOR中实现最小的定子绕组损耗。本文提出了具有正弦分布绕组的多相电机在单个开相故障下的全范围最小损耗（FRML）故障后控制策略，该策略将整个TOR的损耗降至最低。 FRML策略针对不同类型的电机，相数和绕组布置进行评估。提供实验结果。

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