Analysis of Control Characteristic for the Drive System of Electric Transit Bus

The drive control system of the permanent magnetic direct current motor with the enhanced mag-netism windings used in the electric transit bus is developed. The mathematics model of the drive control sys-tem for this motor is established. The new mode that the added-exiting magnetism field could be weakened and the speed of the motor could be controlled automatically is proposed and realized. The method of root locus design is applied to analyze the acceleration control characteristic. The results of simulation show that the new drive motor control system has extraordinary response characteristic and adjustable performance. Experiments of vehicle running show that the drive control system's antijamming ability is strong and the adjustable perfor-mance is fast and smooth, it can meet the demand of power characteristic very well.