In recent years, the use of YVF2 series energy saving motor is also becoming more widespread.Frequency conversion speed control transmission devices have developed at an annual growth rate of 13% to 16% internationally, and there is a trend of gradually replacing most DC speed control transmission devices. Variable frequency speed regulation has become the mainstream speed regulation scheme and can be widely used in various industries for continuously variable transmission.Especially with the increasingly widespread application of frequency converters in the field of industrial control,using AC variable frequency speed regulation motors has significant advantages over DC speed regulation motors.