Product Description:

The DKR02.1-W300N-BE73-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is intended for high-performance axes in gantry mills, presses, and similar machinery. Designed to coordinate large synchronous and induction motors on automated machine tools and production lines, the unit converts three-phase input power into a regulated DC link and pulse-width-modulated output for accurate motion control. It also exchanges real-time commands with higher-level controls and processes motor feedback for closed-loop operation. In large machines, this helps the controller serve as the main power and regulation stage for a single motion axis.

The drive communicates through a SERCOS interface, allowing deterministic velocity and torque setpoints from CNC or PLC masters. Under continuous operation at a 4 kHz carrier frequency, it can deliver a phase current of 141 A, which corresponds to approximately 55 kW of output capability. For short acceleration bursts, the inverter stage tolerates a peak current of 212 A, giving machines extra torque for heavy starts or rapid axis reversals without thermal overload. Internal measurement routines track armature temperature and DC-bus utilization so electrical loading remains within safe operating limits. That behavior is useful where rapid load changes would otherwise disturb motion accuracy.

Input power is supplied from a three-phase network rated at 3× AC 400–480 V ± 10%, while the control electronics use a separate AC 230 V ± 10% auxiliary supply to isolate logic from mains fluctuations. Thermal management relies on a built-in air blower, and total heat dissipation is rated at 1800 W. The metal housing and bus capacitors bring the overall mass to 104 kg, so the mounting structure must support substantial installed weight. Forced-air cooling requires clear airflow around the unit to maintain stable internal temperatures during high-load operation. The separate control supply also helps keep command and monitoring functions available during power-stage events.