Product Description:

The DKR03.1-W200N-BT19-01-FW drive controller is produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. Classified in the Digital Intelligent AC Drive Controller product group, it is intended to power and regulate servo and spindle motors across automated machining cells, transfer lines, and material-handling axes. Its architecture combines a pulse-width-modulated inverter with a rigid DC bus to support real-time torque and speed control between the supply and the motor load.

Communication with supervisory motion hardware is carried over the SERCOS interface, which provides synchronized command and status exchange at high bus rates. At a 4 kHz switching frequency, the power stage sustains 92 A of output current, translating into about 35 kW of continuous mechanical power when paired with an appropriate motor. The internal electronics are supplied by a dedicated AC 230 V control circuit that remains separate from the main power conductors. Thermal management relies on a built-in air blower that moves air through the heat-sink channels and exhausts it to the cabinet exterior. Digital servo and resolver feedback are accepted, and without a brake chopper in the bleeder configuration, regenerated energy returns to the shared DC link or the line supply.

For short duty cycles, the unit can deliver a peak output of 141 A, allowing rapid acceleration or recovery from shock loads without exceeding semiconductor limits. Input supply must remain within 3 x AC 400 to 480 V, so upstream protection and contactors must match that range. Losses during operation reach 1200 W, which affects enclosure ventilation and supports the use of dedicated blower cooling. The hardware package weighs 49 kg, and the unit is listed as line series 03, design version 1, and function module version 01. A nominal current rating of 200 A also affects cable selection, and the rigid bus configuration without an integrated bleeder requires external measures when large regenerative events are expected.