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目前,架线电机车的直流换器,是通过晶闸管直流断续器把输入的直流电转换为电压较低的直流电,向电机车的照明灯和电喇叭供电。这种电源装置存在以下几点不足:1.电源变换效率低这种电源变换装置最大变换效率为40%。变换效率低除了浪费电能外,更重要的是功率器件过热易提前损坏。2
At present, the direct-current converter of a wired electric locomotive converts the direct current input into a low-voltage direct current through a thyristor direct current interrupter to supply electric locomotive lighting and electric horn. This power supply device has the following deficiencies: 1. Low power conversion efficiency This power conversion device maximum conversion efficiency of 40%. In addition to low power conversion efficiency, but more importantly, overheating of power devices is easy to damage in advance. 2