Product Description:

The DKR02.1-W200N-BA31-01-FW belongs to the DKR Drive Controllers series from Bosch Rexroth Indramat. Classified as a digital intelligent AC drive controller, the unit supplies regulated three-phase power to high-torque servo and spindle motors used in machining centers, printing lines, and other automated equipment. Its role in such systems is to translate motion commands into precisely timed current and voltage waveforms that keep the connected motor synchronized with the programmed position or speed profile. This operating method supports stable closed-loop motion on axes that must hold speed or position under changing load conditions.

The drive operates from a mains window of 3×AC 400–480 V and uses a separate control feed of AC 230 V to power logic and sensors. At an IGBT switching frequency of 4 kHz, it can furnish a continuous output of 120 A, allowing sustained shaft power near 47 kW before thermal limits are reached. Internal losses appear as 1600 W of heat, which the built-in blower removes through directed airflow. Command signals reach the controller through an analog interface, while the motor side uses a rigid DC bus because the unit is supplied without a brake chopper. This no-bleeder topology returns regenerative energy to the supply or the mechanical load instead of dissipating it as heat. The separate control feed also helps keep the logic section supplied independently from the main power path.

During rapid acceleration, the inverter delivers up to 141 A peak, and its nameplate current rating is 200 A, figures used for cable sizing and protection settings. Position and speed loops accept feedback from encoders that provide digital servo and resolver feedback, giving flexibility when the application alternates between high-resolution motion and coarse position holding. The controller weighs 104 kg, so cabinet mounting must account for that static load. The unit is design version 1 with function module version 01 and line series 02, which distinguish this configuration from other build levels in the DKR product line.