Product Description:

The DKR04.1-W300N-BE16-02-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat and supplied within the DKR Drive Controllers series. In industrial automation, it serves as the central power stage for synchronized servo axes. It converts three-phase mains power into a controlled DC link and executes motion commands received from higher-level control systems. This arrangement combines power conversion and axis regulation in one unit for large servo applications.

This model accepts a rated power input of 3 x AC 400 to 480 V ±10%, while its internal electronics use a separate control voltage of AC 230 V ±10%. The separate control supply supports the logic and command circuits independently of the main power section. With a switching frequency of 4 kHz, the drive can deliver a continuous current of 185 A, which corresponds to a sustained mechanical output of 82 kW to the connected motor group. Short-duration load peaks are handled by a maximum current of 212 A. Setpoints, diagnostics, and parameter data are exchanged over the SERCOS interface, while motor position loops are closed through digital servo and resolver feedback. Its 300 current class suits large torque motors without external current boosters.

An integrated built-in air blower provides cooling, and the assembly rejects up to 2250 W of heat into the cabinet airflow during nominal duty. That heat load must be carried away by the enclosure ventilation so the power section can remain within its intended operating range. The DC bus operates without a brake chopper, so regenerative energy must be handled externally when deceleration demand is high. The unit has a mechanical mass of about 150 kg, reflecting the large busbars and heat sinks used in this power class. Its weight also calls for a rigid mounting arrangement inside the cabinet.