Frequency inverters

133 companies | 336 products
Decentralized frequency inverter

The VLT® DriveMotor...

Decentralized frequency inverter

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

For universal applications

The Unidrive SP (Universal...

EMC frequency inverter / decentralized

The SK 180E provides you with complete...

Decentralized frequency inverter

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

Asynchronous motor frequency inverter

The ACTIVE is one of the Frequency...

Smart frequency inverter

The AGILE smart sensorless...

The S2U from Bonfiglioli...

Bonfiglioli VCB - power...

Materials handling equipment frequency inverter

The new Dedrive Pro from DEMAG...

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

The WEG CFW700 is a...

Class leading technology...

Coming off from the...

HVAC frequency inverter / high-performance

FRENIC-HVAC is the first slim type inverter from Fuji Electric and dedicated...

3-phase frequency inverter

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

Three-phase frequency inverter / single-phase / high-performance

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

Low-frequency frequency inverter

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

Three-phase frequency inverter / engine

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

Three-phase frequency inverter / engine

BLOCK, the external induction...

The e@syDrive® 4438,...

Digital frequency inverter

Sycotec's frequency inverter is a power...

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

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

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

Vector-controlled frequency inverter

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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