Variable frequency speed regulation motor, abbreviated as variable frequency motor, is a general term for motors driven by frequency converters.YVF2 series VFD blower motor is one kind of adjustable speed motors. Various AC variable frequency speed control motor systems are widely used in various fields such as CNC machine tools, industrial robots, automatic mechanical equipment, flexible production lines in textile, printing, and light industry systems, steel rolling, mining, locomotive drag, aerospace, and shipbuilding.