Method for operating an electrical system, and apparatus for controlling an electrical system
First Claim
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, andin 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.
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Accused Products
Abstract
A method for operating an electrical system in a motor vehicle having two electrical machines connected to the electrical system via one controllable inverter each. A regulated generator mode is initiated. A first step detects a drop below a first predetermined voltage in the electrical system. A second step, on the basis of an induced freewheeling voltage expected for one of the electrical machines, selects one of the inverters and actuating such that the electrical machine connected thereto is operated in electrical freewheel, with the result that the rotation of said machine induces a freewheeling voltage in the electrical system. A third step detects the rise above a second predetermined voltage for the induced electrical freewheeling voltage available in the electrical system. A fourth step actuates the inverter of the first electrical machine such that the first electrical machine connected thereto is operated in regulated generator mode.
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Citations
20 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification