Product Description:

The DKR02.1-W300N-BE16-02-FW is a digital intelligent AC drive controller from Bosch Rexroth Indramat and belongs to the DKR Drive Controllers series. It is intended to regulate torque, velocity, and position for large synchronous or induction motors in machine tools, presses, and handling systems. The unit converts plant-level command data into regulated three-phase output that matches the load dynamics, placing it between the higher-level PLC and the connected motor feedback devices. This control structure lets the drive correct speed and position deviations as operating conditions change during axis motion.

The drive receives motion commands over the SERCOS interface, a fiber-optic bus that carries cyclic setpoints with precise timing. At a switching frequency of 4 kHz, the power stage delivers 141 A continuously, while a short-term ceiling of 212 A supports rapid acceleration and brief overload demand. Current rating code 300 corresponds to the output class used for this controller. Airflow from a built-in air blower keeps internal components within temperature limits, and total waste heat is 1800 W during nominal operation. The DC bus does not include a bleeder or brake chopper, so excess regenerative energy must be handled externally. Dual digital servo and resolver feedback channels support common motor feedback formats, and the controller is supplied as design version 1 in line series 02.

Mechanical output capability reaches 55 kW, providing the power needed for high-inertia axes and demanding motion profiles. The control electronics are fed from a single-phase supply of AC 230 V ±10%, while the inverter bridge draws its main power from 3 x AC 400 to 480 V ±10% three-phase mains. This separation allows the control section and the power section to operate from their respective supply inputs. The assembly weighs 104 kg, so cabinet mounting must support the unit securely and leave enough clearance for airflow from the integrated blower.