If using the absorbing resistor of the vehicle to absorb the regenerative energy during the train operation,the problem of temperature rise occurs in tunnel and platform,and this consequently increases the weight of the vehicle,results in considerable energy consumption and increases the construction cost and operation cost of the metro.

RC absorbed circuit mounted in traction winding and components of converter,in order to reduce operation over voltage and over voltage during current transfer.

Transient Voltage Sharing of Series Connected IGCTs Paralleld with RC-snubbers;