Product Description:

The DKR02.1-W300B-BE23-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat and used in the DKR Drive Controllers series. The device converts three-phase mains energy into regulated output for high-power servo axes, enables controlled braking through an integrated resistor stage, and supervises motion parameters for coordinated machine operation. Its role in automated machining centers and material-handling systems is to deliver responsive torque control while maintaining stable operation for the connected motor set.

All command data reaches the unit through a SERCOS interface, and the internal logic is energized from an AC 230 V control supply with a tolerance of ±10%. The power stage is part of line series 02 and design version 1, and it sustains 55 kW of continuous output at a 4 kHz carrier frequency. Under the same switching frequency, the inverter delivers a continuous motor current of 141 A, while transient thermal load is relieved by an internal bleeder rated for 1.5 kW. Cooling is provided by a built-in air blower that directs airflow across the heat sinks. Feedback inputs accept digital servo and resolver signals, and the W300B code indicates the nominal current class used for this controller type.

During acceleration or emergency stops, the drive can reach a peak phase current of 212 A, while its brake resistor stores kinetic energy up to 240 kWs before thermal saturation. The main power section accepts 3 × AC 400 to 480 V with a tolerance of ±10%, and overall switching losses appear as 1800 W of heat that the cooling fan removes during operation. The controller weighs 104 kg, which affects panel layout and handling requirements. Function module version 01 coordinates bleeder operation so the continuous brake resistor power, total heat dissipation, and rated braking energy remain matched to the applied duty cycle.