Thus AC variable-frequency speed regulating system makes the important role in the electric drives. The auxiliary inverter of electric locomotives is used to provide power for the fan load which cool the main circuit and offer wind regime for the air brake system.
电力机车的辅助电源主要为机车主电路提供冷却、为空气制动系统提供电能；辅助变流器的工作状况直接影响到主电路的工作状态，以及司乘人员的工作环境，是机车稳定、安全运行的关键。
The auxiliary inverter of electric locomotive is used to provide power for the fan load which cools down the main circuit and offer wind regime for the air brake system.
电力机车的辅助逆变器主要为机车主电路冷却风机和空气制动风机提供电能。
Electromagnetic brake cooling fan, contactor coil connected KMb has two slip, one is always intrude KMa KMa contact and, in parallel with the power all the way between intrude feadwater safety switches that normally closed contact.
增热电扇，电磁刹车的隔绝器KMb线圈的连开有两条岔路，一是串出KMa常开触不面与KMa并联，另一路是与电源之间串出盘车不乱残开关的常不开触不面。
Brake is of fan or circular shape with its frictional material possessing enough and stable friction factors and better wear resistance;
摩擦衬片一般为扇形或圆形，其摩擦材料应具有足够而稳定的摩擦系数及较好的耐磨性；