Permanent magnet synchronous motor drive with wheel slip control in traction application

The analysis of a permanent magnet synchronous motor (PMSM) for the traction application with wheel slip control has been presented in this paper. The application demands of Permanent magnet synchronous motor (PMSM) drives in electric traction have been increased to a great extent. The proposed PMSM drive has been integrated with the traction load model which provides us with extremely useful insight into the nature of traction load. The simulation results clearly indicate a high load torque during the acceleration which reduces once the acceleration period is over and the train resumes pure rolling motion. The proposed traction drive has been modeled with wheel slip control strategy which demonstrates how the wheel slip ratio can be controlled to make optimal use of force of adhesion between train wheels and track so as to allow maximum acceleration. The proposed scheme has been modeled to operate at any desired slip. The traction drive accelerates under the influence of slip ratio controller at the desired slip until the reference speed is reached. Once the train reaches the desired speed, the speed controller takes control and maintains the speed at desired value.