5 Critical Variable Frequency Drive Limitations

There are 5 critical variable frequency drive (VFD) limitations that should be considered when selecting the proper VFD for motor speed control applications. A VFD is an electronic circuit that controls the speed of an electric motor by adjusting both the voltage and the frequency applied to the motor. Prior to VFDs, motor speed was controlled through inefficient voltage regulators (think light dimmer switch!) or mechanical means – pulleys, gears, or transmission systems.