变频驱动器（VFD）通过不同的电压控制向感应电机提供变频和电压下的脉宽调制（PWM）功率，从而影响电机功率因数和效率。本文通过两个实验来研究这些影响。第一个实验在三个预设电压控制的不同频率下进行，第二个实验分别在额定频率下通过和绕过aVFD进行。实验结果表明，PWM功率显著降低了电机的总功率因数，并略微降低了效率。 此外，可变电压提高了不同电压控制之间的效率。2021篇虚拟科技论文引文

Variable-frequency drives (VFDs) provide pulse widthmodulation (PWM) power at variable frequency and voltagethrough different voltage controls to induction motors andconsequently impact motor power factor and efficiency. Thispaper investigates these impacts through two experiments. Thefirst experiment is conducted at various frequencies with threepreset voltage controls, and the second experiment isconducted at the rated frequency through and bypassing aVFD, respectively. The experimental results reveal that thePWM power considerably lowers the total power factor of themotor and slightly degrades the efficiency. Moreover, the variablevoltage improves the efficiency differentiated amongdifferent voltage controls.