| 摘要 |
An apparatus (100) for measuring torque and flux current in an AC synchronous drive motor (108), having a shaft (110) magnetically coupled to an a-phase stator, a b-phase stator and a c-phase stator, includes a shaft position indicator (112) that is coupled to the shaft (110) and that generates a position signal indicative of a position of the shaft (110). A current sensing circuit (114) generates a current signal indicative of instantaneous direct link current of the motor (108). A sample and hold amplifier (116) samples the current signal when a trigger input is asserted. A processor (120) asserts the trigger input from trigger generation (124). The processor (120) calculates torque generated by the motor (108) and flux current in the motor (108) based on the current signal value and decoding algorithm (122).
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