Patent ID: 9496817
Filing Date: 2016-11-15
CPC Classification: H02P

Claim Text:
1. A method, performed in an electric motor control circuit of an electric motor, comprising: measuring a winding resistance of a motor winding; determining a winding temperature of a motor winding based upon the winding resistance; accessing thermal model parameters, wherein at least one of the thermal model parameters is a winding temperature obtained from measuring a winding resistance of a motor winding; calculating a simulated operation of the electric motor according to a thermal model of the electric motor based upon the thermal model parameters including the winding temperature and a stator-to-ambient thermal resistance value accounting for a sum of a stator-to-case thermal resistance and a case-to-ambient thermal resistance; and controlling an actual operation of the electric motor based upon the simulated operation of the electric motor according to the thermal model, wherein the calculating the simulated operation is performed iteratively during the actual operation.