Product Description:

The DKR03.1-W200N-BA03-01-FW is a drive controller manufactured by Bosch Rexroth Indramat within the DKR Drive Controllers series. Classified as a digital intelligent AC drive controller, it regulates large synchronous or induction servomotors in production lines and machining centers. This unit uses Line 03 hardware and carries design version 1, while its BA03-01 function module set provides the analog command interface and application logic. That arrangement suits installations that use analog setpoint control instead of a digital fieldbus command path. A rigid DC bus is implemented without a bleeder, so dynamic braking energy must be handled externally. The internal current rating code of 200 places the device in the upper power tier of the series for high-torque axes.

During continuous operation at a 4 kHz switching frequency, the drive can deliver 92 A of output current, allowing sustained mechanical power of 35 kW for the connected motor group. Control electronics are supplied from a separate bus that accepts AC 230 V with a ±10% tolerance, keeping the logic circuits isolated from the main power stage. Separating the control supply from the main input helps maintain stable logic operation during changes in power-stage loading. The power section is wired to a three-phase mains supply of 3x AC 400–480 V, also with a ±10% tolerance, allowing use on common plant distribution networks. For short acceleration bursts, the inverter produces a peak phase current of 141 A, providing additional torque for indexing or rapid traverse cycles.

Thermal management uses a built-in air blower that forces air across the heat sink, and under full load the module releases 1200 W of waste heat that must be removed from the cabinet. Forced airflow supports stable thermal conditions when the drive operates near its continuous output level. Position accuracy is supported by a universal feedback channel that accepts digital servo or resolver feedback, allowing one controller to run motors fitted with either sensor type. Despite its power capacity, the housing weighs only 49 kg, which helps with cabinet placement in large drive assemblies.