Product Description:

The DKR04.1-W300N-BT29-02-FW drive controller is manufactured by Bosch Rexroth Indramat and belongs to the DKR Drive Controllers series. As a digital intelligent AC drive controller, it regulates high-power servo motors in automated machinery through vector control and regenerative operation. The unit mounts inside control cabinets, where it serves as the power stage between a master controller and the motor and provides torque, speed, and position control for industrial automation processes. This arrangement supports coordinated axis motion in equipment that requires stable closed-loop performance under changing load conditions.

Its power stage accepts a three-phase input of 3 x AC 400 to 480 V ±10%, while auxiliary electronics are energized by AC 230 V ±10% control voltage. At a 4 kHz switching frequency, the controller supplies a continuous armature current of 185 A, which corresponds to about 82 kW of sustained mechanical drive power. For short accelerations, it can reach a peak output of 212 A without derating. The optical SERCOS interface serves as the command channel, and the unit processes both digital servo and resolver feedback for closed-loop regulation. The absence of a brake chopper means regenerated energy must be handled externally, and the unit is identified by current rating 300, line series 04, and design version 1.

Thermal management relies on a built-in air blower that carries away the controller’s 2250 W of waste heat during full-load operation. This cooling method allows the 150 kg cabinet module to operate continuously while keeping internal components within their intended temperature range. The total weight includes the integrated fans and the DC bus assembly. Resolver-compatible feedback helps maintain stable position information, and the high-current power section is suited to large servo axes that demand sustained output in cabinet-mounted installations.