Product Description:

The DKR02.1-W300N-BE37-00 is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. As a drive controller, it supplies regulated three-phase power to high-power servo and spindle motors used in production machinery and plant automation. This allows it to support demanding axis motion and speed-controlled processes. It closes the torque and speed loop with internal power electronics and serves as the central conversion stage between the mains supply and the motion axes.

The controller draws its main supply from a 3x AC 400 to 480 V network with a tolerance of ±10%, while a separate control section runs on AC 230 V with the same margin. Commands arrive via a SERCOS interface, giving deterministic fiber-optic cycles. At a 4 kHz switching frequency, the power stage delivers 141 A of continuous current and about 55 kW of drive power, and it can reach 212 A for brief acceleration. Because the design omits a bleeder and brake chopper, regenerated energy must be absorbed by the machine or an external resistor. Digital servo and resolver feedback close the loop. The unit has current rating 300, Line 02, design version 1, and function module version 00.

Thermal management relies on a built-in air blower that forces cooling air through the heat sinks and expels about 1800 W of losses to the surrounding air. This airflow keeps semiconductor temperatures within operating limits while the controller handles its full current range. The forced-air arrangement requires clear cabinet ventilation so heated air can leave the enclosure without recirculating through the heat sinks. The housing weighs 104 kg, so cabinet mounting must account for both the physical load and the required airflow path. During rapid deceleration, the rigid DC bus may rise in voltage, so external braking hardware may be needed with high-inertia loads.