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Inverters, AC Drives,
Variable Frequency Drive (VFD)


A variable-frequency drive (also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives) 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. 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. For example, in ventilations systems for large buildings, variable-frequency motors on fans save energy by allowing the volume of air moved to match the system demand. Variable frequency drives are also used on pumps, conveyor and machine tool drives.

REA Technologies has had much experience in repairing these Inverter drives.


We can repair drives from these manufacturers:
(if yours isn't listed, call us. We can repair it.)

  • Matsushita/Panasonic
  • Meidensha  
  • Mitsubishi
  • Motortronics
  • Nord
  • Omron
  • Panasonic/Matsushita
  • PDL 
  • Plasma Technics-
  • Polyspede
  • Reliance
  • Robicon
  • Saftronics
  • Samsung
  • SEW/Eurodrive
  • Siemens   
  • Square D
  • Spangpower
  • Sumitomo
  • Taian
  • T. B. Woods
  • Teco
  • Telemecanique
  • Telemotive
  • Toshiba
  • Tuncmatik
  • Unico
  • US Drives
  • US Electric Motors
  • Vacon
  • Weg
  • Yaskawa
  • York
  • Zener
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