Product Description:

The 15.F5.G1E-350A is an AC axis drive produced by KEB within the F5 Combivert Axis Drives series. As a variable-frequency inverter, it supplies regulated three-phase power to induction or synchronous motors up to 15 horsepower, enabling speed and torque control in automated machinery. The unit has housing form factor E and inverter size code 15, which establish its mechanical envelope and terminal layout. A factory-installed braking transistor allows connection of an external resistor for controlled energy dissipation during rapid deceleration.

During continuous operation, the drive draws a rated input current of 31 A from the mains and delivers a rated output current of 24 A to the motor terminals. Its power section provides a sustained apparent output power of 17 kVA. Gate control runs at a rated switching frequency of 4 kHz, while modulation can be raised to 16 kHz when acoustic noise or torque ripple requires finer resolution. The integrated braking transistor accommodates a maximum braking current of 21 A. Overcurrent protection activates at 43 A, and upstream coordination requires a 35 A mains fuse. Motor leads with conductor sizes up to 6 mm² are secured to the power blocks with a tightening torque of 2.5 Nm. The heat sink removes thermal energy from the power electronics to keep junction temperatures within the permitted range during operation.

Transient loading is supported by a peak phase current of 36 A, providing headroom before overcurrent protection engages. The heat sink may reach a maximum temperature of 90 °C without derating, corresponding to internal power losses of 350 W. For regenerative deceleration, the resistance of the external braking resistor must not fall below 39 Ω. A 56-ohm resistor is often selected to moderate its surface temperature. The control board actively adjusts the braking duty cycle to keep the transistor and heat sink within their operating limits during repeated stops in indexing or positioning axes.