Method for control of an externally excited electric machine of a motor vehicle, and the motor vehicle
AssigneeAudi AG
InventorRoman Straßer
Life of this patent
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Abstract
A method for control of an externally excited electric machine of a motor vehicle, wherein a current flow is generated and/or controlled in at least one exciter winding of the electric machine by way of a power module connected to the exciter winding, wherein a counter-voltage is generated by way of a de-excitation module, connected to the exciter winding and arranged separately from the power module and operated separately from the power module, which is applied to the exciter winding and at least partly compensates for the voltage currently being generated by way of the power module and applied to the exciter winding, so that a de-excitation of the exciter winding occurs.
Claims14
A method for control of an externally excited electric machine of a motor vehicle, the method comprising:
- generating a current flow in at least one exciter winding of the electric machine by way of a power module connected to the at least one exciter winding,
- generating a counter-voltage by way of a de-excitation module, connected to the at least one exciter winding and arranged separately from the power module and operated separately from the power module;
- providing the counter-voltage to the at least one exciter winding,
- wherein the counter-voltage at least partly compensates for a voltage currently being generated by way of the power module and provided to the at least one exciter winding, and
- wherein the counter-voltage provided to the at least one exciter winding causes a de-excitation of the at least one exciter winding.
A motor vehicle comprising:
- an externally excited electric machine;
- a power circuit connected to at least one exciter winding of the electric machine, wherein the power circuit, in operation, generates or controls a current flow in the at least one exciter winding of the electric machine;
- and
- a de-excitation circuit connected to the at least one exciter winding, wherein the de-excitation circuit is arranged separately from the power circuit and is operable separately from the power circuit, wherein the de-excitation circuit, in operation, generates a counter-voltage that is provided to the at least one exciter winding, wherein the counter-voltage at least partly compensates for a currently-generated voltage generated by the power circuit and provided to the at least one exciter winding, and wherein the counter-voltage causes a de-excitation of the at least one exciter winding.
Dependencies are inferred from the claim text.