Product Description:

The DKR02.1-W300N-BE34-02-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. Intended for high-power servo axes, the unit conditions three-phase mains energy and modulates it with pulse-width patterns. It then supplies regulated torque and speed commands to connected motors in automated machining centers and material-handling lines, supporting accurate response under changing load conditions.

During continuous operation, the drive sustains 141 A of output current at a 4 kHz switching frequency, enabling roughly 55 kW of mechanical power at the shaft when paired with suitable motors. Its peak capability rises to 212 A for acceleration phases before protection limits intervene. Power enters through a three-phase supply of 3×AC 400–480 V ±10 %, while internal logic and I/O are supported by a separate AC 230 V ±10 % control circuit. This arrangement separates main power from auxiliary electronics and helps keep control functions stable during operation. The DC link has no bleeder and no brake chopper, so surplus energy must be handled by external devices. A nominal current rating of 300 A places the unit at the top end of the series, and digital servo and resolver feedback channels allow the controller to close velocity and position loops quickly. The product is design version 1 and part of Line 02.

An integrated blower provides built-in air blower cooling. The fan removes up to 1800 W of loss heat so semiconductor junctions stay within limits at sustained load. Motion commands, diagnostics, and parameter sets are exchanged through the SERCOS interface, permitting deterministic timing across multiple axes and supporting coordinated machine movement. Installation planning must account for a transport weight of 104 kg, and mounting eyes are included on the enclosure for handling during placement in large automation cabinets.