Product Description:

The DKR03.1-W100Z-BE37-01-FW belongs to the DKR Drive Controllers series produced by Bosch Rexroth Indramat. As a digital intelligent AC drive controller, it is used in automated machining centers, presses, and handling systems to regulate large synchronous or induction motors with precise current and velocity loops. The unit forms the central power stage between a plant’s motion control processor and its motor, translating high-level commands into controlled three-phase output for coordinated multi-axis motion. This arrangement helps the drive respond quickly to command changes while maintaining stable motor operation.

The controller communicates through a SERCOS interface, allowing cyclic setpoint exchange and diagnostics over fiber-optic cables. At a switching frequency of 4 kHz, it can supply a continuous armature current of 71 A. The controller is rated for a drive output of 26 kW when used with a suitable motor. A separate control section requires AC 230 V (±10%) so the logic and sensors remain energized even when the main bus is isolated. Thermal management relies on air cooling with a built-in blower, which draws cabinet air across the heat sink without external ducting. Fiber-optic communication also helps maintain reliable data transfer in electrically noisy industrial cabinets.

The power stage has a current rating of 100 and operates from a three-phase supply of 3× AC 400–480 V (±10%), enabling integration on common industrial power systems without a step-up transformer. During acceleration, the drive can provide short-term current to help overcome motor inertia and support responsive motion. The unit dissipates 900 W of heat, a value used to size enclosure ventilation. Its weight of 49 kg affects panel reinforcement and mounting support. Digital servo and resolver feedback inputs allow closed-loop positioning or speed control for applications that require accurate axis movement.