Product Description:

The DKR03.1-W200N-BT26-01-FW is manufactured by Bosch Rexroth Indramat and belongs to the DKR Drive Controllers series. It is a digital intelligent AC drive controller intended to regulate high-power servo axes in automated machinery. In multi-axis systems, it serves as the power stage between the supply section and the connected servo motor, converting electrical input into controlled motor current for torque and speed regulation. The model code places the unit in Line 03 and identifies current class 200, design version 1, and function module release 01. It operates from a rigid DC bus and does not include a brake chopper, so regenerated energy must be handled elsewhere in the system.

The drive accepts a rated mains supply of 400–480 V AC in a three-phase configuration with a tolerance of ±10 percent, and it requires a control supply of AC 230 V for logic power. With a 4 kHz PWM carrier, it delivers a continuous output current of 92 A, which corresponds to about 35 kW of continuous shaft power when used with compatible motors. During acceleration and short overload events, the output current can rise to 141 A, so the surrounding power components must be sized for that demand. Motor position data can be processed through digital servo or resolver feedback, and the SERCOS fiber loop carries cycle-synchronous setpoints and diagnostics. This arrangement supports precise speed and position control during demanding operating cycles.

Total thermal loss during nominal operation is 1200 W, which should be considered when planning enclosure ventilation or an external heat exchanger. Despite its output capability, the controller has a mass of 49 kg, which helps keep panel installation manageable. An internal blower moves air through the heat sink fins to control semiconductor temperature, and the forced-air layout avoids separate liquid-cooling hardware. Dedicated connection points are provided for the feedback circuits, helping keep signal wiring organized inside the cabinet.