A thyristor (SCR) phased controlled propulsion system with linear, regenerative characteristics for electricall powered vehicles

An electric vehicle propulsion system utilizing motor armature current feedback in conjunction with motor field current switching provides a precise method for the conversion of energy from electric to mechanical form and from mechanical to electric form. The mechanical energy contained in a moving vehicle is converted to electric energy which may be utilized to supplement the electric generating plant, thereby minimizing power consumption from the off vehicle electric generating system. The propulsion system also provides accurate acceleration and braking torque by utilizing closed loop techniques. Vehicle braking torque from zero to full capacity of the propulsion motors can be generated from maximum vehicle speed down to zero velocity. The system bandwidth was measured to be 10 Hertz.