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发明授权
US07126306B2 Motor control unit 失效
电机控制单元

Motor control unit
摘要：
Windings of each phase in a three-phase AC motor are independent of one another. A motor control unit gives, to windings of each phase (U, V and W-phase), currents (IU, IV, IW) obtained by adding, to a fundamental sine wave current, a current having a frequency which is three times as high as that of the fundamental sine wave current. That is, IU=I·sin ωt+Ia·sin 3ωt: IV=I·sin(ωt+2/3π)+Ia·sin 3ωt: IW=I·sin(ωt+4/3π)+Ia·sin 3ωt Also, amplitude Ia of a current having a frequency which is three times as high as that of the fundamental sine wave current is set to a predetermined value smaller than amplitude I of the fundamental sine wave current.
摘要（中）：

三相交流电动机中每相的绕组彼此独立。 电动机控制单元给每相（U，V和W相）的绕组提供通过将基本正弦波电流加到频率为三倍的电流而获得的电流（IU，IV，IW） 高达基波正弦波电流。 也就是说，<？in-line-formula description =“In-line Formulas”end =“lead”？> IU = I.sin omegat + Ia.sin 3omegat：<？in-line-formula description =“In-line 公式“end =”tail“？> <？in-line-formula description =”In-line Formulas“end =”lead“？> IV = I.sin（omegat + 2 / 3pi）+ Ia.sin 3omegat： ？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> IW = I.sin（omegat + 4 / 3pi）+ Ia.sin 3omegat <？in-line-formula description =“In-line Formulas”end =“tail”？>此外，具有三倍高频率的电流的振幅Ia 基本正弦波电流被设定为比基本正弦波电流的振幅I小的规定值。

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