Product Description:

Bosch Rexroth Indramat manufactures the DKR04.1-F300 as part of the DKR Drive Controllers series. Classified as a digital intelligent AC drive controller, it is designed to regulate large induction or synchronous motors in automated machinery lines. The device converts fixed mains power into variable voltage and frequency outputs while coordinating feedback from the attached axis. In industrial automation cells, the controller supplies torque, position, and velocity control functions required for presses, gantries, and processing centers. This supports stable motor control across changing speed and load conditions.

At a switching frequency of 4 kHz, the drive can deliver a continuous output current of 185 A, which is the sustained phase current it can supply without thermal overload. Under the same operating point, the corresponding continuous shaft power reaches 82 kW, making it suitable for high-power axes. Internal logic and contactors are energized by a control supply of AC 230 V ±10%, while the power section accepts three-phase mains in the 400–480 V AC range with the same tolerance. During full-load operation, the liquid heat exchanger must remove 2250 W of losses to keep semiconductor junction temperatures within safe limits.

For short transients such as acceleration or shock loading, the drive can source a peak current of 212 A. Overall device dimensioning follows a nominal current rating of 300 A, which is used for wiring selection and fuse coordination inside the cabinet. Thermal energy is carried away by a closed-loop circuit that relies on liquid cooling, allowing dense stacking of multiple DKR units without excessive ambient airflow. The unit has a weight of 150 kg, so the cabinet frame must provide adequate support during installation. The controller is design version 1 and belongs to line 04, using the same I/O arrangement as related controllers in the series.