Product Description:

The DKR02.1-W300N-BA03-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. This unit regulates three-phase servo and spindle motors in automated machinery, converting commanded velocity or torque references into precise current patterns. By coordinating with upstream PLCs, it provides closed-loop motion control for axes that require high power and dynamic response in machining centers, presses, and transfer lines.

Control electronics are energized by AC 230 V ±10%, so only a modest auxiliary supply is needed inside the cabinet. The power stage connects directly to 3xAC 400-480 V ±10% mains, eliminating transformer losses and simplifying global installation. With a carrier frequency of 4 kHz, the drive sustains 55 kW of continuous shaft power while holding the output steady at 141 A RMS. Short bursts up to 212 A provide additional torque during rapid tool changes or acceleration events. The family current class is 300, which corresponds to conductor cross section and fuse sizing matched to this output range. An analog interface handles command words, and digital servo or resolver feedback returns precise position data to the controller. A rigid DC bus is used because no brake chopper or bleeder resistor is fitted, so regenerative energy must be managed by the mechanical system or a shared bus. Built-in blower cooling moves air through heat sink channels, and the unit belongs to line series 02 with function module 03, design version 1, and module version 01.

During continuous operation, the controller expels 1800 W of heat, removed by a built-in air blower without external ducting. Its welded chassis and power components bring the total mass to 104 kg, which helps damp vibration inside the cabinet. The cabinet must provide enough space for airflow around the cooling path and for handling the unit's weight.