Product Description:

The DKR03.1-W200N-BE24-02-FW is a digital AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. The device serves as the central power stage between the plant’s three-phase supply and a servo or spindle motor, providing closed-loop speed and torque regulation for machining centers, material-handling axes, and other motion-control tasks. By reading motor feedback signals and issuing rapid current commands, it allows a higher-level CNC or PLC to maintain precise positioning across multiple electrical axes. This arrangement lets the drive handle real-time motor response while the machine control manages axis coordination and operating logic.

Primary power is accepted from 3xAC 400–480 V lines with a ±10% tolerance, while the control electronics are energized by a separate AC 230 V feed so diagnostic functions remain isolated from the main bus. At a 4 kHz switching frequency, the unit delivers a continuous armature current of 92 A, which corresponds to roughly 35 kW of output in matched applications, and it can furnish up to 141 A during acceleration peaks. An internal current rating of 200 A provides thermal margin that helps protect the IGBT bridge from overload when several axes operate together. The separated control supply also helps the unit retain monitoring capability when the main power stage is not active.

The DC bus uses no bleeder, so excess regenerative energy must be routed to an external resistor or returned to the supply. Heat from the power stage is removed by a built-in air blower, and the assembly releases 1200 W into the cabinet at maximum load. Real-time motion commands arrive through the SERCOS interface, and dual-channel digital servo and resolver feedback allow mixed encoder systems to operate from one controller. The module is part of line 03, uses design version 1, weighs 49 kg, and is intended for coordinated vector-control applications without an onboard brake chopper.