Frequency inverters

131 companies | 327 products
Decentralized frequency inverter

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

Induction frequency inverter

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

3-phase frequency inverter

The WEG CFW700 is a...

Class leading technology...

Induction frequency inverter

Coming off from the...

Vector control frequency inverter / for asynchronous motors

The ACTIVE is one of the Frequency...

Vector control frequency inverter / smart

The AGILE smart sensorless...

Vector control frequency inverter

The S2U from Bonfiglioli...

3-phase frequency inverter

Bonfiglioli VCB - power...

Vector control frequency inverter / EMC / decentralized

The SK 180E provides you with complete...

Regenerative frequency inverter / decentralized

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

Materials handling equipment frequency inverter

The new Dedrive Pro from DEMAG...

3-phase frequency inverter

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

Single-phase frequency inverter / three-phase / high-performance

FRENIC-Multi is an all-round inverter...

Vector control frequency inverter / low-frequency

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

3-phase frequency inverter / low-voltage / economic

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

Induction frequency inverter / three-phase / engine

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

Induction frequency inverter / three-phase / engine

BLOCK, the external induction...

Asynchronous frequency inverter

The e@syDrive® 4438,...

Asynchronous frequency inverter / digital

Sycotec's frequency inverter is a power...

Synchronous frequency inverter

The CHV190 series is a range of special inverter...

Vector control frequency inverter

The CHV110 Series is a range of low voltage inverter...

Vector control frequency inverter

The CHA100 series is a four quadrant vector control...

Vector control frequency inverter / vector-controlled

The Goodrive 300 series is manufactured by Invt, and...

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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