Drive device for an electric vehicle

摘要

he drive mechanism has a permanently excited synchronous machine (M) which can be operated in the motor mode and generator mode as well as in idle mode. A battery (B) supplies the machine in motor mode and is charged by the machine in generator mode. When an inverter (U) power switches (B1-B6) are activated in idle mode, a magnetising current is superimposed to match the return DC voltage arising from terminal voltages (UZW) in the machine's windings to the battery voltage (UB). The power switches are deactivated for further idling.