Product Description:

The DKR03.1-W100N-BE45-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat within the DKR Drive Controllers series. Intended for multi-axis machinery and high-power servo motor groups, the unit converts mains power into regulated three-phase output while exchanging motion commands over a fiber-optic bus with upstream CNC or PLC hardware. By integrating power electronics and real-time control in one enclosure, the controller performs the velocity, torque, and position regulation used in automated assembly lines, presses, and packaging systems.

Its communication layer uses the SERCOS interface, allowing real-time data exchange at 4 kHz, and the drive can supply a continuous current of 71 A. At the same switching frequency, the power section is rated for 26 kW, which supports sustained operation under load. Logic circuits are energized by a separate AC 230 V control supply so memory and diagnostics remain active when the main bus is isolated. For mains connection, the power stage accepts 3×AC 400–480 V with a tolerance of ±10%, matching common industrial distribution networks. Internal cooling relies on a built-in air blower that forces airflow across the heat sinks to keep semiconductor temperatures within limits. The rated peak current matches the continuous value, so short transients are handled through control bandwidth rather than current oversizing.

Heat removed by the blower is quantified as 900 W, a value that is useful for cabinet climate calculations. The unit has a mass of 49 kg, so the mounting structure must support a comparatively heavy drive package. The power section has a current rating of 100 and belongs to line series 03, while the control board is design version 1 with function module version 01. The unit has no bleeder on the rigid DC bus, so external braking resistors cannot be connected and motor energy must be recovered by the mains or dissipated mechanically. Digital servo and resolver feedback channels are supported for precise rotor position reporting to the drive.