Circuit unit and method for controlling load currents
AssigneeVolkswagen Aktiengesellschaft
InventorThomas Keup
Life of this patent
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Abstract
The invention relates to a circuit unit for controlling load currents of an electrical load, comprising a circuit logic, at least n switch elements with n≥2, resistance elements with m≥1, wherein the resistance elements can be bridged by means of the switch elements, wherein the circuit logic is designed such that it increases the load current in steps to a final value by means of an activation sequence of the switch elements, and a method for controlling load currents of an electrical load.
Claims9
A circuit for controlling load currents of an electrical load, comprising:
- a circuit logic;
- plurality of switch elements;
- a plurality of resistance elements, wherein
- the resistance elements are arranged in series with each other, forming a resistor series arrangement;
- the resistor series arrangement is arranged between a power supply and the electrical load;
- wherein
- at least one of the resistance elements can be bridged by switching on at least one of the switch elements, wherein
- the circuit logic is configured to increase the load current through the electrical load in steps up to a final value by an activation sequence of the switch elements, which activation sequence decreases the number of resistance elements between the power supply and the electrical load;
- wherein
- an overlap is provided in the activation sequence such that a second of the switch elements is switched on before a previously activated first of the switch elements is switched off.
A method for controlling a load current of an electrical load with a plurality of resistance elements, arranged in series with each other forming a resistor series arrangement and a plurality of switch elements, the resistor series arrangement being arranged between a power supply and the electrical load, the method comprising:
- increasing, during an activation sequence, a load current through the electrical load in steps up to a final value by controlling the switch elements, wherein the activation sequence decreases the number of resistance elements between the power supply and the electrical load, wherein
- the switch elements are controlled such that a second of the switch elements is switched on before a previously activated first of the switch elements is switched off.
Dependencies are inferred from the claim text.