Motor open-phase rapid detection method

The invention relates to the technical field of motor detection, and discloses a motor open-phase rapid detection method, which comprises the following steps of: sampling any current sampling time point of a non-zero crossing point of three-phase current by using a motor driver, and collecting an instantaneous value of the three-phase current at each sampling time; reversely deducing a peak value of the three-phase current according to the instantaneous value obtained in the step 1 and a reverse deduction formula; and performing threshold comparison by using the three-phase current peak value reversely deduced in the step 2 to judge whether the motor is open-phase or not. According to the motor open-phase rapid detection method, the algorithm is simpler and easy to implement, the algorithm resource occupation overhead is small, no special requirement is needed for hardware resources, a special hardware detection circuit does not need to be designed, a conventional frequency converter and a servo driver can me