A method of testing stepping motors.

摘要

The phases ( phi A- phi C) of the moteur (10) are connected in series, and a constant current is applied to the phases. The rotor (12) of the motor (10) under test is rotated at a constant speed, and the voltage drop across each phase is measured and converted into back EMF. The back EMF is then analyzed to determine a characteristic of the motor (10), for example stepping accuracy of each of the phases, or related torque information, and the result of the analysis is then compared with a predetermined motor parameter to provide comparison data or a signal of a pass or fail condition based upon the comparison.