Disconnecting device and power supply network for a motor vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsThomas Klawitter, Christoph Weissinger
Life of this patent
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Abstract
A disconnecting device for a power supply network of a motor vehicle is provided. The power supply network has a first sub-network and a second sub-network. The disconnecting device includes a switching element for switchably coupling the first sub-network to the second sub-network. The disconnecting device also includes a control unit, which is configured to control at least one state variable of the power supply network by actuating the switching element.
Claims13
A disconnecting device for an energy supply system of a motor vehicle, wherein the energy supply system has a first subsystem and a second subsystem, the disconnecting device comprising:
- a switching element that is configured to couple the first subsystem to the second subsystem in a switchable manner;
- a regulation unit that is configured to regulate at least one state variable of the energy supply system by driving the switching element;
- an inductive component that is arranged between the switching element and one of the subsystems;
- and
- a freewheeling component that is arranged in parallel with the inductive component, wherein the freewheeling component comprises a freewheeling diode that is arranged in series with a resistor,
- wherein the regulation unit is configured to generate a control signal for driving the switching element in a faulty operating state of the first subsystem by pulse width modulation or to modulate the switching element by pulse width modulation in order to regulate the at least one state variable, such that the switching element is repeatedly opened and closed during the faulty operating state in order to regulate the at least one state variable.
A method for operating an energy supply system for a motor vehicle, wherein the energy supply system has a first subsystem and a second subsystem that is coupled to the first subsystem in a switchable manner by a switching element, the method comprising:
- regulating at least one state variable of the energy supply system by driving the switching element;
- limiting, by an inductive component that is arranged between the switching element and one of the subsystems, a flow of energy between the first subsystem and the second subsystem in a faulty operating state;
- and
- limiting, by a freewheeling component that is arranged in parallel with the inductive component, a voltage that is dropped across the inductive component during switching of the inductive component,
- wherein the freewheeling component comprises a freewheeling diode that is arranged in series with a resistor, and
- wherein driving the switching element comprises generating a control signal for driving the switching element in a faulty operating state of the first subsystem by pulse width modulation or modulating the switching element by pulse width modulation in order to regulate the at least one state variable, such that the switching element is repeatedly opened and closed during the faulty operating state in order to regulate the at least one state variable.
Dependencies are inferred from the claim text.