Abstract
On traction system of electric train, VVVF inverter which can drive induction motor by variable frequency drive has been achieved by development of power electronics. And speed-sensorless control in VVVF inverter can estimate rotation speed of motor in real-time, so it can control traction torque of train and accomplish anti-slip re-adhesion control with high adhesion force. In one side, train truck became lighter and simple, so it makes vibration characteristics of truck to be worse. Changing the traction torque triggers the pitching vibration of truck. This paper clarifies relationship between dynamics of the truck with parallel cardan drives and traction motor torque, and proposes a control method of traction motor to reduce pitching vibration of truck by traction motor torque.
