What's a Frequency Inverter?

Frequency inverter also called frequency converter, it is a power control conversion device to convert normal

power supply (50Hz or 60Hz) to another frequency power by inner power semiconductor on/off behaviors, to

control electric motors in variable speed operations. Variable frequency control is changing the frequency

supply to the motor stator windings to achieve variable speed control purpose.

The frequency inverter is mainly consisted of rectifier (AC to DC), filter, inverter (DC to AC), braking unit,

drive unit, detection unit and micro processing unit etc. The control circuit controls main circuit, the rectifier

circuit converts AC power into DC power, DC intermediate circuit smoothing the rectifier circuit output, then

the inverter circuit reverse DC current into AC current again.

A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive,

micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to

control AC motor speed and torque by varying motor input frequency and voltage

Application considerations

Frequency Converter for Pumps

Frequency inverter for heavy duty application (mining)

Frequency inverter energy savings for Thermal Power Plant

Frequency inverter in Oil Industry

Frequency inverter reconstruction to save energy

Frequency inverter in power plant

Frequency inverter on pumps for energy saving

Frequency inverter for fans for energy saving

Frequency inverter in Screw extruding machines

Inverter drive in injection machine

Frequency inverter in Automatic Disk Type Plastic Molding Machine

Frequency inverter in NC Lathe

Frequency inverter for Air Compressor

Inverter in injection molding machine advantages

Frequency inverter in hoist & crane

List of VFD company LS

ABB

Mitsubishi VFD

Hitachi VFD

Saftronics VFD

Omran

Delta