Product Description:

The DKR02.1-W300B-BA03-01-FW is an intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. As a digital motion control unit, it converts three-phase mains power into regulated motor output so that large servo axes can perform coordinated speed, torque, and position tasks in automated machinery. The unit is used where high-power servo motors must be decelerated, reversed, or held with precise regenerative braking.

Electrically, the drive accepts a three-phase mains supply of 3xAC 400–480 V and uses an internal control circuit that runs on AC 230 V ±10%. At a 4 kHz switching frequency, it can deliver a continuous output current of 141 A, translating to about 55 kW of sustained mechanical power for connected motors. Thermal management is supported by a built-in air blower, which moves heat away from the IGBT modules without external ducting. Command signals enter through an analog interface, and both digital servo feedback and resolver feedback are supported for closed-loop regulation. The unit is part of line series 02, design version 1, and function module 03 version 01.

The internal bleeder circuit is paired with a brake resistor that absorbs 1.5 kW continuously and up to 240 kWs of energy during rapid deceleration events, protecting the DC bus from overvoltage. For short transients, the regulator can source a peak phase current of 212 A, allowing dynamic torque surges above its continuous rating. During operation, the controller releases about 1,800 W of heat that must be removed by ambient airflow. Total assembly mass is 104 kg, so cabinet mounting provisions must accommodate that load while still permitting access to the built-in blower, brake resistor, and analog command terminals.