Product Description:

The 09.F4.C3D-1220 frequency inverter is produced by KEB as part of the F4 Combivert Frequency Inverters series. It is intended for small-to-medium automation cells where variable-speed control of an AC induction motor improves process flexibility and energy efficiency. By modulating the voltage and frequency delivered to the motor, the unit replaces mechanical throttling devices and allows programmable acceleration profiles that integrate with PLC-based material handling, packaging, and light machining equipment. This operating approach also helps the connected motor respond more smoothly to changing load conditions during routine production.

Incoming power is a single-phase supply in the 230 V class. The converter delivers up to 2.8 kVA of apparent power at a nominal output current of 7 A, matching fractional-horsepower machines that require stable torque. Motor rating can reach 1.5 kW, and the inverter achieves this by driving an IGBT bridge at a carrier frequency of 4 kHz. Within this switching scheme, the compact vector modulation control mode sets any frequency between zero and 409.5875 Hz. This range supports standard four-pole motors and high-speed spindles while serving both constant-torque and variable-torque loads. A standard option firmware block stores predefined parameter sets, and single-phase input wiring simplifies integration into existing equipment.

Transient overloads are tolerated through a short-time ceiling of 12.6 A. If line or load conditions push current past the overcurrent tripping threshold of 15 A, the gate driver disables the bridge to protect the semiconductors. For braking cycles, the accessory package includes a filter and braking transistor mounted beside the drive so regenerated energy is diverted to a resistor and conducted emissions are reduced. The D housing profile supports dense stacking in control cabinets. The compact architecture remains consistent with the standard option family across the F4 Combivert platform.