Product Description:

The DKR04.1-W300E-BE37-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. It conditions three-phase power, regulates motor currents, and exchanges motion data with CNC or PLC hosts, serving as the central power stage for coordinated machine axes in tooling, printing, and handling systems. Built for high-power applications, it combines a rigid DC bus with an external bleeder and an integrated brake chopper so regenerated energy can be dissipated safely during rapid deceleration.

Motion commands reach the drive through the SERCOS interface, which is a deterministic fiber-optic link for synchronized multi-axis operation. At a 4 kHz carrier frequency, the power stage provides a continuous current of 185 A, allowing sustained torque on large servo motors, and it also supports a continuous output of 82 kW for constant mechanical power delivery. The DC link is energized from a 3 × AC 400–480 V mains supply, while the internal logic circuits use a separate 230 V AC ±10 % control voltage. These electrical limits set the compatible mains transformers, circuit protection, and cable cross-sections used in an automation cabinet, and they help match the drive to the available plant supply.

For short acceleration bursts, the inverter can reach a peak output of 212 A, matching the short-term demands of connected servo windings. Switching losses and auxiliary electronics generate up to 2250 W of heat, which is removed by forced air cooling from the built-in blower to keep internal components within their operating range. The assembly weighs 150 kg, so lifting equipment or rail-mounted support is appropriate during installation. The unit uses Version 1 control hardware, and its resolver-plus-digital feedback inputs allow connection to motors that require accurate position and speed feedback.