Answer / md. zakir hosen

VFD means Variable Frequency Drives.A variable-frequency
drive (VFD) is a system for controlling the rotational speed
of an alternating current (AC) electric motor by controlling
the frequency of the electrical power supplied to the motor.

thanking u
http://a2zengineering.blogspot.com/

Answer / rohan k trivedo

simply we can understand vfd by the below relation

N= 120f/p
so in vfd speed will be controlled with the change in
frequancy. and frequancy can be changed by the thyristor
control pannel.

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