A Study on Motor Temperature Characteristic of TTX(Tilting Train eXpress)

초록

In the 1970's in which the development of semiconductors was not enough, the train speed was controlled using the resistance control method. In the 1980's, the chopper control system which is excellent in energy saving and riding comfort was introduced. Though it was certainly the time of advanced train technology, as the motor traction system used DC motors, there were problems in system stability because of the parts necessary for rectification, its management costs, and flashover. With the development of the reverse conductive GTO thyristor elements with high voltage and capacity at the end of the 1980's, they were able to be used in the electric trains. Since the early 1990, induction motors have been used in quantities for subway trains in Korea. As the induction motors are without commutators, maintenance is easy and it is far lighter than the conventional motors with the same capacity. The induction motor, however, posed problems in use as its motor torque is not large enough compared with DC motors. With the recent advances in power semiconductors, it is possible to apply the induction motors to trains by applying VVVF inverter control method to the traction motor.