A Transistorized Chopper-Inverter Controller for Electric Vehicle Propulsion

An ac electric-vehicle propulsion system employing ultra-high power Darlington transistors is described. The power conditioner consists of a two-quadrant chopper and a six-transistor inverter bridge that feeds a 15-hp 120-V 4-pole 7600-rpm permanent-magnet motor. A functional model of the power conditioner and motor has been built and tested.