Product Description:

The DKR03.1-W200N-BA42-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It supplies regulated three-phase power to high-power servo motors used on positioning, milling, press, and other synchronized machine axes in industrial automation. Installed as the power stage in a Rexroth cabinet, the unit works with upper-level motion processors to manage current, voltage, and motor feedback loops so each axis can follow programmed trajectories during continuous and point-to-point motion. This arrangement places the controller between the cabinet power supply and the connected motor axis.

The controller accepts a rated power bus of 3x AC 400–480 V with a tolerance of ±10%, while ancillary electronics are supplied by a dedicated AC 230 V control feed so parameters and diagnostics remain available during line disturbances. At a switching frequency of 4 kHz, the power stage delivers a continuous phase current of 92 A and allows short acceleration bursts up to 141 A. This current capability supports roughly 35 kW of continuous mechanical output for connected motors. Current rating code 200 indicates the thermal design margin, and the unit is part of line series 03 with design version 1 and function module version 01.

Thermal management relies on forced airflow, and an internal built-in air blower removes heat generated by the IGBT bridge. Overall losses reach 1200 W at rated load, so the cooling path must carry a substantial heat burden during continuous operation inside the cabinet. Command signals enter through an analog interface, while position data return through digital servo and resolver feedback for closed-loop regulation across different motor feedback arrangements. The rigid DC bus design has no brake chopper, so regenerated energy is forwarded to the shared supply module, and the housing weighs 49 kg.