09.F5.B1B-3A0A by KEB

The 09.F5.B1B-3A0A is an axis drive module manufactured by KEB within the F5 Combivert Axis Drives series. Installed between the mains supply and a three-phase induction motor, the unit modulates voltage and frequency so automated machinery can vary speed and torque without mechanical gear changes. Its BASIC open-loop flux vector control algorithm provides regulation for conveyors, packaging stations, and motion tasks while keeping setup simple.

During continuous operation, the drive accepts a three-phase supply at 400 V, converting that input into an apparent power of 2.8 kVA at the motor terminals. The internal power section provides a motor output of 1.5 kW, making it suitable for small process motors used in fans, pumps, or indexing axes. Current capability reaches 4.1 A under rated conditions, establishing the thermal limit of the output stage and requiring a minimum motor lead size of 1.5 mm². The switching devices operate at a nominal 8 kHz, balancing acoustic noise and semiconductor losses. The resulting 80 W of heat is removed through the rear heat sink, while the standby electronics draw only 17 W when the axis is idle.

For transient demands such as rapid acceleration, the inverter can raise its switching frequency to 16 kHz and supply a short-term current of 7.4 A, providing additional torque without saturating the flux vector control. Integrated protection includes an internal braking transistor that routes surplus DC energy to an external resistor with a resistance of at least 120 ?. The heat sink temperature must remain below 90 °C to protect internal components. The drive has an IP20 enclosure that measures 90 × 220 × 160 mm and uses Form Factor B, allowing installation in compact control panels. Its total DC supply loss is 75 W, and the open-loop controller maintains stable regulation when an imbalance occurs across the three mains phases.