Method for operating an electric machine
AssigneeRobert Bosch GmbH
InventorsMarc Eschenhagen, Rasmus Rettig, Franziska Kalb, Michael Merkle, Werner Schiemann, Joachim Joos
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Abstract
A method and a circuit system for operating an electric machine are presented. The method is carried out in particular in a starting phase, a current being limited using a controllable resistor, the controllable resistor being implemented by at least one semiconductor switch, which is controlled using a clocked signal, and the signal being set in such a way that in shutdown phases, the at least one semiconductor switch is not completely shut down.
Claims11
A method for operating an electric machine in a starting phase, comprising:
- limiting a current using a controllable resistor that is, implemented by one or multiple semiconductor switches controlled using a clocked signal, the signal being set such that, in shutdown phases, the one or multiple semiconductor switches are not completely shut down, wherein, in the shutdown phases, the one or multiple semiconductor switches are operated in a linear range with a finite resistance.
A system for carrying out a method for operating an electric machine in a starting phase, the method comprising limiting a current using a controllable resistor, the controllable resistor being implemented by one or multiple semiconductor switches controlled using a clocked signal, the system comprising:
- the one or multiple semiconductor switches;
- and
- a control circuit, which provides the signal for controlling the one or multiple semiconductor switches;
- wherein the signal is set such that the one or multiple semiconductor switches are not completely shut down in shutdown phases, wherein, in the shutdown phases, the one or multiple semiconductor switches are operated in a linear range with a finite resistance.
Dependencies are inferred from the claim text.