... 0.5s once per 10 minutesOperational control characteristicsControl mode V/f controlSensor-less vector control without PG 1Sensor- ... , weak magnetic control, high-precision torque restraint, V/f separated control, torque control without PG, torque ... , crane, machine tool, conveyor, compressor, drilling machine, carding machine, roving machine, compressor, crusher, pump, fan, etc. AC motor drives with ...