Product Description:

The DKR03.1-W200N-BE38-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. Within an automation cell, it regulates torque, speed, and position for large servo motors and forms the link between the plant’s 400 V class power network and motion axes that require high dynamic response in assembly lines, presses, and machining centers. The unit is intended for demanding motion tasks where stable current control and closed-loop feedback are needed for accurate axis behavior.

At a switching frequency of 4 kHz, the unit sustains a continuous phase current of 92 A, which corresponds to about 35 kW of drive power during steady-state duty. Acceleration reserves are supported by a peak capability of 141 A, while the W200N rating indicates a 200 A current class used for circuit protection sizing. The power stage accepts a three-phase supply of 3x AC 400 to 480 V with a tolerance of ±10%, and the control section remains energized by a separate AC 230 V supply so diagnostics and stored parameters can remain available during mains dips. A rigid DC bus is used without a brake chopper, so regenerative energy must be handled by external components. Motor feedback inputs support both digital servo encoders and resolver signals for mixed-technology installations.

Communication with the machine controller is handled through a SERCOS interface, allowing real-time setpoint exchange and standardized telegrams. Internal losses are removed by a built-in air blower, and under nominal load the unit releases about 1200 W of heat that must be removed from the cabinet. The housing has a mass of 49 kg, so the mounting surface must provide adequate support. The unit is in line series 03 with design version 1 and function module version 01. There is no integrated bleeder assembly, so the rigid DC bus arrangement must be considered when selecting external braking resistors and DC link components.