Patent ID: 6841961
Filing Date: 2005-01-11
Classification: H02P

Abstract:
1. A method for estimating a resistance in at least one phase winding in a reluctance machine, the method comprising: receiving a signal indicating a voltage across the at least one phase winding; receiving a signal indicating a current through the at least one phase winding; estimating a magnetic flux in response to the voltage signal and the current signal; and estimating the resistance in the phase winding in accordance with a phase relation between the current signal and the magnetic flux estimate; wherein the resistance estimation further comprises: determining a relation or a difference value between the magnetic flux estimate and the current signal; and adjusting the estimated resistance depending on the difference value or the relationship value; wherein the adjustment of the estimated resistance comprises: determining a phase difference between the magnetic flux estimate and the current signal; or determining an amplitude of the magnetic flux estimate at a predetermined amplitude level of the current signal.