Product Description:

The DKR03.1-W200N-BE43-02-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Installed in multi-axis machining centers and handling systems, it supplies regulated three-phase power to matched servo or spindle motors and exchanges motion commands with cell-level controllers over a deterministic fiber loop. The device combines power conversion, axis control, and diagnostic logic so that industrial automation equipment can maintain commanded speeds and torques under variable mechanical loads. In machining and transfer applications, that arrangement helps axes respond steadily to changing loads during cutting, indexing, and material movement.

During continuous operation at the controller's 4 kHz switching frequency, the power stage can deliver 92 A of output current, which supports a shaft power of 35 kW when paired with compatible motors. Incoming commands are received through the SERCOS interface, allowing cycle-synchronous positioning data and parameter changes on the same fiber. The internal logic and blower fans are energized from a single-phase control feed of AC 230 V ±10%, while the main power section accepts a three-phase supply of 3 x AC 400–480 V ±10%. The unit is built without a brake chopper, so regenerated energy must be handled by the plant supply or by external equipment. Cooling is provided by an integrated blower that moves air across the heat-generating components.

For short demand peaks, the drive can source up to 141 A, giving machines reserve torque for acceleration or disturbance rejection. Waste heat equals 1200 W, so enclosure ventilation must remove that load to keep semiconductor temperatures within allowable limits. The unit has a mass of 49 kg and is intended for standard panel mounting. Motor position data can be processed from digital servo and resolver feedback, which allows one controller to work with different feedback technologies. No bleeder circuitry is present, so applications that require rapid dynamic braking must use external resistors or regenerative mains units.