Product Description:

The DKR02.1-W300N-BE33-01-FW is a digital intelligent AC drive controller from Bosch Rexroth Indramat in the DKR Drive Controllers series. It serves as the central power stage for large servo motors by converting plant mains into a regulated DC link and a pulse-width-modulated output for precise velocity and torque control in automated machining cells, press lines, and material-handling systems. The controller is also suited to multi-axis installations that require rapid acceleration and synchronized positioning. Its power section and control functions support demanding industrial axes that must respond accurately to changing load conditions.

At a switching frequency of 4 kHz, the drive supplies a continuous output of 141 A, which corresponds to about 55 kW of mechanical power during sustained duty. The power section accepts a three-phase mains range of 400–480 V ±10%, while an auxiliary supply of AC 230 V ±10% powers the control electronics. Thermal losses reach 1800 W, so cabinet airflow must remove heat from the enclosure during operation. Current rating 300 identifies the frame used for the line-commutated rectifier section, and the unit does not include an internal brake chopper.

For short transients, the inverter delivers up to 212 A peak, providing reserve torque during acceleration spikes and other brief load changes. Cooling is handled by a built-in air blower that channels air across internal heat sinks, and the assembly weighs about 104 kg, which is important for cabinet support and placement. Communication with higher-level motion control is handled through the SERCOS interface, while dedicated circuits process digital servo and resolver feedback to maintain closed-loop accuracy. This arrangement allows the controller to exchange command data and return motor feedback without requiring a separate communication module.