Frequency inverters

131 companies | 325 products
Induction frequency inverter / vertical

The WEG CFW-08 VSD is designed to provide speed control for...

Vertical frequency inverter

The WEG CFW700 is a...

3-phase frequency inverter / vertical

Class leading technology...

Vector control frequency inverter / vertical

The S2U from Bonfiglioli...

3-phase frequency inverter / vertical

Bonfiglioli VCB - power...

Single-phase frequency converter / horizontal / decentralized

With a wide range of standard integrated pump and fan features,...

3-phase frequency inverter / panel mount / decentralized

The VLT® Decentral FCD 300 converter is specifically designed...

Regenerative frequency inverter / horizontal / decentralized

The SK 200E Nord has proven its quality and reliability...

Asynchronous frequency inverter / housed / conveyor / engine

The MOViTRAC® LTE B is an innovative type of...

Asynchronous frequency inverter / vertical / conveyor / modular

MOVI4R-U® frequency inverters offer the ideal solution...

Analog frequency inverter / decentralized / open loop

MOVIFIT® FC is configurable frequency inverter, used in the lower...

3-phase frequency inverter / vertical

FRENIC-MEGA, which is the successor of former G11S series and named as a Maximum Engineering...

Vector control frequency inverter / benchtop / low-frequency

With FRENIC-VG, Fuji Electric has concentrated its technologies to deliver the...

Vertical frequency inverter / economic / low-voltage

FVR-Micro is an economical inverter that demonstrates...

Induction frequency inverter / three-phase / panel mount / engine

The NEO-WiFi is specifically designed to provide...

Asynchronous frequency inverter / digital / horizontal

Sycotec's frequency inverter is a power...

How to choose this product

frequency-inverter

A frequency inverter controls the speed or torque of an electric motor. It can operate in four quadrants, by acceleration or braking, and in either direction.

Applications

Industrial uses for these devices include the control of high-power electric motors, machine tools and transport machinery. They are also found in the plastics and metal industries, on injection molding equipment, construction cranes, windlasses and other lifting gear, and on air compressors and pumps.

Technologies

While these inverters are usually found on asynchronous three-phase machines, some are used with single-phase motors or synchronous versions with permanent magnets.

They can regulate motor speed along an acceleration curve, compensating for load and the variation in speed or torque. Braking requires the use of a dissipation resistor or the re-injection of dissipated energy into the electrical network. Control can be a function of a potentiometer setting, a 0-10 V or 4-20 mA signal, via an RS485 serial port or a Profibus, Modbus or Ethernet network.

Speed adjustment is by incremental or absolute encoder, a tachometer generator or current flow analysis without a sensor. Such devices also improve power factor and protect the motor from excess voltage and current. They maintain speed or torque within a normal range and forestall oscillatory phenomena.

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