Product Description:

The DKR02.1-W200B-BE43-02-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It supplies regulated three-phase power to large servo and spindle motors used in machining centers, presses, and gantries. The controller regulates motor voltage and current so that connected axes can maintain commanded torque and speed under changing loads. An internal brake resistor absorbs regenerative energy directly, which simplifies cabinet layouts in high-inertia applications. This arrangement is useful where large rotating masses must decelerate quickly without relying on a separate external braking assembly.

The controller is arranged for three-phase supplies from 400–480 V, while its control electronics use an auxiliary 230 V feed. This separate supply helps keep the control section stable during normal line variation. At a switching frequency of 4 kHz, it delivers a continuous armature current of 120 A, which corresponds to 47 kW of drive power. The built-in brake resistor dissipates 1.5 kW continuously and can absorb up to 240 kWs during rapid deceleration. Cooling is handled by a built-in air blower, so full current is available without external ducts. Command data reaches the unit through a SERCOS interface, and either digital servo feedback or resolver feedback returns position information for closed-loop control.

During transient events, the drive can deliver 141 A for acceleration bursts, while total thermal loss is limited to 1600 W. That short-term current capacity supports rapid speed changes without shifting the continuous rating. The unit is part of line series 02, design version 1, and function module 43. Even with its steel housing and integral blower, the drive weighs 104 kg, which supports vertical panel mounting with standard lifting eyes. Its mass and integrated cooling hardware suit rigid cabinet structures used with high-power motion equipment.