Patent ID: 9395735
Filing Date: 2016-07-19
CPC Classification: G05F,H02M

Claim Text:
1. A control unit for an electric machine, the control unit comprising: a processing unit; a power output stage connected to the processing unit, wherein the power output stage is connected to an output for stator coils of a stator of the electric machine and the processing unit is designed to supply current to the power output stage for generating a stator field; an electrical energy store connected to the power output stage, wherein; an input for a temperature signal; and a temperature sensor which is connected to the energy store and is designed and disposed to acquire a temperature of the energy store and to generate a temperature signal corresponding to the temperature, wherein the processing unit is designed to actuate the power output stage as a function of the temperature signal such that the energy store can be heated by a current application pattern generated by the power output stage and the current application pattern corresponds to a field which cannot generate a full revolution of a rotor of the electric machine, wherein the temperature sensor is designed to detect voltage transients of a voltage dropping across the energy store and to generate the temperature signal as a function of the voltage of the voltage transients.