Variable frequency speed regulation motor, abbreviated as variable frequency motor, is a general term for motors driven by frequency converters. Variable frequency speed regulation has become the mainstream speed regulation scheme and can be widely used in various industries for continuously variable transmission. In fact, the motor designed for the frequency converter is a specialized motor for frequency conversion. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to changes in load requirements. Variable frequency motors have evolved from traditional squirrel cage motors, replacing traditional motor fans with independent fans and improving the insulation performance of motor windings.

With the increasingly widespread application of frequency converters in the field of industrial control, the use of variable frequency motors is also becoming more and more widespread. It can be said that due to the superiority of variable frequency motors over ordinary motors in frequency control, we can easily see the presence of variable frequency motors wherever frequency converters are used.