Patent ID: 8314578
Filing Date: 2012-11-20
Classification: B60K,B60L,H02P,Y02T

Abstract:
1. An electric circuit for a hybrid powertrain system, comprising: a multiphase bridge inverter electrically connected to a high-voltage battery via positive and negative sides of a high-voltage DC power bus; a multiphase asynchronous AC machine electrically connected to the multiphase bridge inverter; a high-voltage DC link capacitor electrically connected between the positive and negative sides of the high-voltage DC power bus; a low-voltage battery electrically connected to upper and lower gate drive bias power supplies; and a plurality of gate drive pre-charge circuits, each electrically connected between one of the gate drive bias power supplies and the multiphase bridge inverter; wherein the low-voltage battery electrically charges the high-voltage DC link capacitor via the upper and lower gate drive bias power supplies and the gate drive pre-charge circuits when a high-voltage switch disconnects the high-voltage battery from the high-voltage DC power bus.