Product Description:

The DKR03.1-W200N-BE11-02-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. The device converts mains power into a controlled DC link and a modulated three-phase output for high-power servo and spindle motors used in metal-cutting, forming, and handling equipment. It is intended for demanding machine tools and production systems that require stable torque delivery and synchronized axis response. Within an automation cell, it closes the velocity and position loops between the SERCOS master and the machine axis, allowing coordinated multi-axis motion, integrated diagnostics, and parameter storage in a rack-mountable module.

At a switching frequency of 4 kHz, the drive can deliver a continuous current of 92 A, corresponding to about 35 kW of mechanical shaft power when paired with a compatible motor. This output range supports substantial motor loading during cutting, forming, and other high-inertia motion tasks. Transient load peaks are handled by a maximum output of 141 A, and the control electronics are energized from a separate AC 230 V supply with a tolerance of ±10%. Command data and real-time feedback travel over the SERCOS interface, and the unit supports digital servo and resolver feedback for precise commutation and position evaluation. The unit is version 1, and its power section is matched to line series 03 modules with a 200 A rating. Because the drive operates on a rigid DC bus without a brake chopper, excess regenerative energy must be routed to an external resistor or returned to the supply.

Thermal management relies on forced air cooling from a built-in blower that carries waste heat away from the power stage. Under rated load, the controller releases up to 1200 W into the cabinet, so adequate ventilation is required when the unit is powered from 3×AC 400–480 V mains. Good cabinet airflow helps maintain stable internal temperature during extended duty cycles. Despite its high current capability, the assembly weighs 49 kg.