How does a VFD work?
Variable frequency drive is a governor that can automatically adjust the motor speed according to the load demand, which can effectively protect the motor and prolong the service life of the motor.
The working principle of variable frequency drive is to control the frequency, amplitude and phase difference of power supply AC voltage to realize the purpose of adjusting the speed of motor. Variable-frequency drive uses advanced electronic technology to rectify, filter, invert and regulate the power supply AC voltage, and then get the AC output with adjustable frequency and amplitude characteristics, so as to drive the induction motor to rotate.