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Reduction of capacitive and induced shaft voltages in an induction motor drive using dual-bridge inverter approach

机译:使用双桥逆变器方法降低感应电动机驱动器中的电容性和感应轴电压

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摘要

The dual-bridge inverter approach, developed to eliminate the common-mode voltage and the resulting bearing current generated by frequency converters, is investigated by means of experiments and simulations. The approach reduces the capacitive and induced shaft voltages by more than 80% in the examined 1.4MW induction motor drive. The remaining shaft voltage is found to be caused by the rectifier-generated common-mode voltage and a time delay between the PWM pulses of the parallel inverter units.
机译:通过实验和仿真研究了开发用于消除共模电压和变频器产生的轴承电流的双桥逆变器方法。该方法在检查的1.4MW感应电动机驱动器中将电容性和感应轴电压降低了80%以上。发现剩余的轴电压是由整流器产生的共模电压和并联逆变器单元的PWM脉冲之间的时间延迟引起的。

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