Patent ID: 9673742
Date: 2017-06-06
CPC Classifications: H02K,H02P

Claim:
1. A method of controlling an automotive electric machine comprising: adjusting operation of the machine based on a magnetic flux change for the machine that is a function of a back electromotive force of the machine compared to a baseline back electromotive force, and adjusting operation of the machine based on multiplying a predetermined d-axis current command by a d-axis current change; and wherein the d-axis current change (ΔId) is (−Δλm/Ld)(Taper_DeltaId), where Δλm is the magnetic flux change, Ld is a d-axis inductance of the machine, and Taper_DeltaId is 1.0 when a full voltage is applied to the machine and (M_Index−M_Index_Min)/(M_Index_Max−M_Index_Min), when less than a full voltage is applied to the machine, where M_Index is a normalized commanded voltage magnitude, M_Index_Min is a minimum normalized commanded voltage magnitude, and M_Index_Max is a maximum normalized commanded voltage magnitude.