SYSTEM FOR CALIBRATING AN ELECTRICAL CONTROL SYSTEM

摘要

A method calibrates a current sensing instant to latch a current value from a set of current signals (402 in FIG. 4). A current command including a magnitude at a Gamma angle is provided to control a motor when the motor is operating in a motoring mode at a shaft speed (404). A matching current command including a same magnitude at a same Gamma angle is provided to control the motor when the motor is operating in a braking mode at a same shaft speed (408). A first actual averaging rms current magnitude of three phase currents of the motor is monitored when the motor is controlled by the current command and operating in the motoring mode (406). A second actual averaging rms current magnitude of the three phase currents of the motor is monitored when the motor is controlled by the matching current command and operating in the braking mode (410). A current sensing instant is adjusted (416) until an observed first actual averaging rms current magnitude in the motoring mode equals an observed second actual averaging rms current magnitude in the braking mode.