In fact, the frequency conversion technology uses the principle of motor control to control the motor through the so-called frequency converter. The motor used for such control is called a variable frequency motor.

Common frequency conversion motors include three-phase induction motors, brushless dc motors, alternating current brushless motors and switched reluctance motors.

Frequency conversion speed control has become the mainstream speed control scheme, which can be widely used in all industries.

Especially, with the increasingly extensive application of frequency converter in the field of industrial control, the use of frequency converter is also increasingly widespread. It can be said that because frequency converter is superior to ordinary motor in frequency control, it is not difficult to see the figure of frequency converter wherever it is used.