Patent ID: 9186998
Filing Date: 2015-11-17
Classification: B60L,Y02T

Abstract:
1. A method for operating an electrical system of a motor vehicle wherein the electrical system has at least two electrical machines connected to the electrical system each by a controllable inverter, wherein a regulated generator mode of a first of the electrical machines is initiated, the method comprising: in a first step, detecting whether an electrical voltage in the electrical system falls below a first predefined voltage value, in a second step, depending on an expected induced freewheeling voltage of one of the electrical machines, selecting one of the inverters and actuating such inverter such that the electrical machine which is connected to the selected inverters is operated in electrical freewheel mode, so that said electrical machine, as a result of its rotation, induces a freewheeling voltage which is applied to the electrical system, in a third step, detecting whether the freewheeling voltage in the electrical system exceeds a second predefined voltage value, and in a fourth step, the inverter of the first electrical machine is actuated such that the first electrical machine is operated in the regulated generator mode.