Product Description:

The DKR02.1-W300Z-BE37-01-FW is an industrial AC drive controller developed by Bosch Rexroth Indramat for the DKR Drive Controllers series. As a dedicated axis module, it converts incoming mains power into variable three-phase output for servo and spindle motors, coordinating torque, speed, and position in automated machining centers, printing presses, and material-handling lines. It is suited for applications where the controlled axis must follow changing speed and position commands while maintaining stable torque response. The unit belongs to the Digital Intelligent AC Drive Controller product group, so it includes integrated diagnostics and parameter storage for closed-loop industrial motion control.

The drive communicates with the machine controller through a SERCOS interface, allowing high-speed cyclic setpoint exchange while also processing digital servo and resolver feedback for closed-loop positioning. At a 4 kHz switching frequency, it can deliver a continuous armature current of 141 A, which corresponds to a sustained mechanical output of 55 kW. Mains power is supplied at 3×AC 400 – 480 V ±10%, and internal logic uses a separate AC 230 V ±10% control supply to keep the control electronics isolated from the power stage. For rapid acceleration events, the inverter permits a peak output of 212 A without derating. The unit is part of Line 02, uses design version 1, and has function module version 01.

Thermal management relies on a built-in air blower that forces airflow across the heat sink and semiconductor stack, expelling up to 1800 W of switching losses during maximum load cycles. The enclosure, wiring ducts, and integrated fan assembly bring the controller mass to 104 kg, so the mounting structure must support substantial static load and vibration. Because the cooling hardware is already integrated, installation only requires clear inlet and exhaust paths within the cabinet, and unobstructed airflow helps the power stage remain within its operating temperature range. The cabinet layout should also allow adequate access around the fan section and power connections without crowding adjacent modules.