Product Description:

The DKR04.1-W300E-BE23-01-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. As a multi-axis servo drive, it regulates torque, speed, and position of compatible Indramat motors in automated machinery, linking the control system to the mechanical load with closed-loop precision. This unit is intended for applications such as gantry movement, printing lines, and material handling where coordinated motor response and accurate axis control are required.

The drive provides a continuous output current of 185 A at a 4 kHz switching frequency, allowing it to support sustained load without thermal saturation. Under the same conditions, it can deliver 82 kW of mechanical shaft power, which suits large synchronous or asynchronous motors in high-inertia systems. Short-duration overloads are accommodated by a peak current limit of 212 A, and the 300 rating code corresponds to this output class. Mains power is supplied by 3 x AC 400–480 V, while the control electronics use AC 230 V to keep the logic and power sections separate. Motor feedback channels accept digital servo and resolver signals, allowing the controller to work with different encoder technologies.

Thermal management relies on a built-in air blower that forces circulation through the power section, and at full continuous load the assembly releases 2250 W of heat. An external bleeder with a brake chopper and a rigid DC bus lets regenerated energy be dissipated outside the housing during rapid deceleration. Motion commands reach the controller over the SERCOS interface, which supports high-speed communication with compatible control platforms. The housing weighs 150 kg, so lifting equipment is needed for handling. The unit is part of line series 04 with design version 1 and function module version 01.