Product Description:

The DKR03.1-W100N-BT49-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. Intended for multi-axis machining centers, gantries, and other high-power motion platforms, the unit converts three-phase mains energy into controlled output that regulates torque, velocity, and position of compatible servo motors across demanding industrial axes. By combining high-bandwidth current loops with integrated processing, it serves as the central actuator in automated cells where coordinated motion, fast acceleration, stable synchronization, and diagnostic feedback are required during continuous operation. The controller is suited for axes that must start, stop, and reverse quickly while maintaining precise motion response under changing loads.

This controller operates from a mains supply of 3 x AC 400 to 480 V ±10%, while internal logic draws a separate control feed of AC 230 V ±10%; the split arrangement isolates power conversion from command electronics. With a 4 kHz PWM carrier, it can sustain 71 A continuously, corresponding to about 26 kW of drive output, so large synchronous or asynchronous machines can run without derating during sustained motion tasks. Heat from the switching devices exits through a forced-air channel that uses a built-in blower, allowing cabinet mounting without liquid lines. The SERCOS interface supports deterministic communication, while digital servo and resolver feedback provide closed-loop accuracy in CNC or robotics applications that depend on synchronized axis response.

Because the power section has no bleeder or brake chopper and uses a rigid DC bus, regenerated energy must be dissipated externally, which affects the sizing of supply reactors or braking resistors in stop-start axes. During acceleration bursts, the converter can briefly maintain that same current level within a shorter duty cycle governed by internal protection. The assembly expels 900 W of heat through its blower path, so cabinet airflow must handle this loss while accommodating the unit's 49 kg installed weight. The unit is design 1 with function module 01 and line series 03.