Product Description:

The DKR04.1-W400E-BE23-01-FW is an AC drive controller produced by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. It is intended to regulate large servo or spindle motors in industrial automation cells where high dynamic torque, regenerative braking, and networked motion commands are required. The unit combines power electronics, communication hardware, and feedback processing in one housing so coordinated multi-axis control can be implemented over a common DC bus. This layout supports centralized control of demanding motion tasks in equipment such as machine tools, processing lines, and other heavy-duty automated systems.

The controller exchanges setpoint and diagnostic data through a SERCOS interface, allowing deterministic communication with CNCs or PLCs. At a switching frequency of 4 kHz, the power stage can deliver a continuous armature current of 210 A, which corresponds to a continuous shaft power of about 93 kW when paired with motors that have matched voltage constants. Internal logic and blower fans are supplied by a control voltage of AC 230 V ±10%, separating the low-power supply from the main bus. Thermal energy produced by the IGBTs and the brake chopper is removed by a built-in air blower, so external liquid circuits are not required.

For brief acceleration peaks, the inverter can source 282 A, giving the machine extra torque headroom during short demand spikes. The mains connection accepts 3 x AC 400–480 V with a ±10% window, allowing the controller to operate from common plant distribution systems. When braking energy is routed to the external resistor through the rigid DC link, the housing releases up to 2500 W of heat, which helps determine the required enclosure airflow. The unit weighs about 150 kg, so mounting and handling arrangements should account for its size and mass.