Patent ID: 8729847

Claim:
A method for mapping torque to current to generate a first current command, comprising: selecting, based on a DC input voltage, selected ones of a first plurality of lookup tables (LUTs), each comprising: a plurality of first entries, wherein each first entry comprises a set of coefficients that correspond to a corresponding input value of an angular rotation speed of an electric machine; outputting, in response to a particular input value of the angular rotation speed of the electric machine, a set of coefficients from each of the selected ones of the first plurality of LUTs; applying each of the sets of coefficients output from each of the selected ones of the first plurality of LUTs within a first polynomial function to generate a plurality of first polynomial functions each having a different one of the sets of coefficients, where each of the plurality of first polynomial functions is a function of a torque command signal; and generating particular output values for a first current command via each of the plurality of first polynomial functions in response to a particular input value of a torque command signal.