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Products > AC 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. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives. Since the voltage is varied along with frequency, these are sometimes also called VVVF (variable voltage variable frequency) drives.

Variable-frequency drives are widely used. In ventilation systems for large buildings, variable-frequency motors on fans save energy by allowing the volume of air moved to match the system demand. They are also used on pumps, elevator, conveyor and machine tool drives.

Variable Speed Drives save energy by reducing power consumed by motors driving centrifugal pumps, fans and other rotating equipment. By controlling the speed of a motor, the amount of energy used by the machinery is optimized.

Hitachi Inverters    

1-X200 Series

2-SJ200 Series

3-SJ700 Series

 

   
   

 

 

 

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