Product Description:

The 09.F4.S3D-4001 is a frequency inverter produced by KEB as part of the F4 Combivert Frequency Inverters series. It converts fixed AC input into variable voltage and frequency output so standard induction motors can accelerate, decelerate, and hold commanded speed in conveyors, pumps, and material-handling equipment. This control method helps the connected motor respond smoothly to changing process demand during normal machine operation. Because output frequency and voltage change together, the inverter can reduce mechanical shock during start-up and help maintain stable speed under varying loads.

This inverter includes a built-in filter and braking transistor, which lowers conducted emissions and dissipates regenerated energy during rapid stops. It uses standard control, which supports default V/Hz and sensorless vector operating modes for general-purpose drive tasks. Thermal management is handled by an integrated fan that moves air across the heat sink to maintain semiconductor temperatures. Protection is supported by static and dynamic current monitoring, which compares instantaneous and averaged phase current to set limits and reacts quickly to abnormal load conditions. Torque production remains linear because the output stage uses hardware-based current regulation instead of software-only limiting routines.

The mechanical envelope follows the D housing format, which gives the drive consistent mounting dimensions within the series. Compliance with IEC1000 noise immunity helps the unit withstand typical plant electromagnetic disturbances without loss of control. Its power stage uses IGBT modules that switch at high carrier frequencies to provide a smooth sinusoidal output for a three-phase motor. Static and dynamic voltage monitoring supervises the DC link and phase outputs, and the input classification is a special customer version that allows parameter sets tailored to site conditions. This arrangement supports smoother motor current waveforms and reduces abrupt electrical stress on the connected machine.