YKA3422MA is identical-angle constant-torque microstep drive with working voltage AC110~220V. It’s designed for various models of three phase 86~130mm (NEMA 34~50) hybrid stepper motors which current are below 4.2A.
With a servo-similar control circuit, YKA3422MA can drive motors at low speed with almost no vibration or noise. Motor torque at high speed is much higher than two-phase or five-phase hybrid stepper motor.