CPC H02P 6/08 (2013.01) [H02P 25/022 (2013.01); H02P 2207/055 (2013.01)] | 20 Claims |
1. A method comprising:
generating an offline Maximum Torque Per Amps (MTPA) curve based on an autotune test for a motor;
generating a search zone for the MTPA curve for a given torque point, the search zone comprising an upper D-axis reference current and a lower D-axis reference current for the given torque point, wherein the MTPA curve comprises torque points of torques for current pairs of a Q-axis current and a D-axis current for the motor;
iteratively modifying a D-axis reference current between the upper D-axis reference current and the lower D-axis reference current of the search zone;
modifying a Q-axis reference current to output the given torque; and
updating a corresponding current pair of the given torque point to the modified D-axis reference current and the modified Q-axis reference current with a lowest current amplitude to further improve the efficiency of the motor.
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