Product Description:

The DKR02.1-W300N is a drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Classified as a digital intelligent AC drive controller, it supplies regulated three-phase power to high-torque servo and spindle motors used in automated production lines, gantry systems, machining centers, and similar industrial equipment. By converting fixed-frequency mains into variable voltage and frequency output, the unit enables closed-loop control of speed, position, and dynamic braking within numerically controlled equipment. This operating role makes it suitable for axes that require controlled acceleration, deceleration, and stable motor response under changing load conditions.

The power section accepts a mains input of 3xAC 400 ... 480 V (±10 %), while the logic circuits use a separate AC 230 V control supply. With a 4 kHz carrier, the unit can deliver a continuous armature current of 141 A, corresponding to a sustained mechanical output of about 55 kW. Short acceleration bursts are supported by a peak current capability of 212 A, allowing the connected motor to overcome inertial loads without stalling during demanding motion cycles. These electrical limits determine the size of upstream protection devices and the required busbar cross-sections in the cabinet.

Thermal management is handled by a built-in air blower cooling system, which removes up to 1800 W of heat from the power stage and keeps semiconductor junctions within a safe operating range during continuous use. The chassis, mounting plates, and blower assembly bring the total shipped weight to 104 kg, an important figure when planning panel support or hoisting. Because the controller uses a rigid DC bus without a bleeder configuration, excess regenerated energy must be absorbed by other drives on the common bus or by external resistors. The controller is in line series 02 and design version 1, matching standard DKR cabinet dimensions for multi-axis assemblies during long production runs.