电压源驱动的五相准方波反电动势永磁同步电动机的转矩缺口最小化

P. Mccleer, J. Lawler, B. Banerjee
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引用次数: 5

摘要

准方波反电动势永磁同步电机可以设计成这样,即反电动势波形的恒压部分的角度范围(以电气度计)可以超过150度或更多。在电压源驱动的五相电机中,每个相绕组在每个极性上只被驱动144度。因此,这些机器有一个重叠期,其中相位绕组电流可以整流,而相位绕组反emf是恒定的。扭矩缺口抑制控制方案描述了在这个恒定的反电动势重叠期间的功能。输入(接通)相和输出(关断)相两端的驱动电压之差保持在确保输出相在重叠周期内完全换相所需的值。这两个驱动电压的总和保持在预换相值恒定,以确保恒定的扭矩产生。在换相期间,提供给机器其余三相的各个驱动电压也保持不变。给出并讨论了典型波形和开关速度要求。
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Torque notch minimization for five phase quasi square wave back EMF PM synchronous motors with voltage source drives
Quasisquare wave back EMF PM synchronous machines an be designed such that the angular extent (in electrical degrees) of the constant voltage portion of the back EMF waveform can exceed 150 degrees or more. In a five phase machine with voltage source drive each phase winding is nominally driven for only 144 degrees in each polarity. Thus there is an overlap period for these machines in which phase winding currents can be commutated while the phase winding back EMFs are constant. The torque notch suppression control scheme described functions during this constant back EMF overlap period. The difference of the drive voltages presented to the terminals of the incoming (turn-on) phase and the outgoing (turn-off) phase is held at a value needed to insure complete commutation of the outgoing phase within the overlap period. The sum of these two drive voltages is held constant at the precommutation value to insure constant torque production. The individual drive voltages presented to the remaining three phases of the machine are also held constant during the commutation period. Typical waveforms and switching speed requirements are presented and discussed.<>
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