Voltage changer for electric machines e.g. for starter in vehicle, has phase windings in a machine connected to multiple bridge circuits each with multiple electrically controllable switches and buffer store operating as a capacitor.

摘要

Electrodes (16,17) for a foil capacitor (15) surrounding a machine use the periphery of the machine to make a distributed connection to bridge circuits (1-3,n). The foil capacitor and switches (11,12) for the bridge circuits in contact with it are jointly fixed on a cooling body running round the machine.