Product Description:

The DKR04.1-W400E-BE32-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. It serves as a central power stage for large servo and spindle motors in industrial automation, combining line rectification, inverter output, and motion control in one housing. By accepting three-phase input power and exchanging real-time commands with higher-level control systems, the unit delivers regulated current for stable speed and torque control during metal-cutting, printing, and material-handling tasks. Its integrated design helps reduce the need for separate power conversion hardware in high-demand drive systems.

Communication with the axis computer is handled through a SERCOS interface, which uses fiber-optic transmission for high-speed position and diagnostic data exchange. The power section accepts a mains supply of 3xAC 400 ... 480 V with a ±10% tolerance, while the control electronics use a separate AC 230 V feed so auxiliary functions can remain active when the main supply is isolated. Heat is removed by a built-in air blower, allowing the module to control internal temperature without external ducting. Under a 4 kHz switching pattern, the inverter supplies a continuous output current of 210 A to the motor phases, which supports steady operation during long production runs and repeated load changes.

The line converter and IGBT bridge allow short demand bursts of up to 282 A without derating, which helps when the driven axis requires added acceleration torque. In combination with an external bleeder and a rigid DC bus, the drive dissipates up to 2500 W of heat as the blower moves air across the power modules. Continuous output reaches approximately 93 kW, making the controller suitable for high-power gantry mills, roll stands, and press-feed systems. Even with that power capacity, the enclosure weighs 150 kg, which supports floor mounting or reinforced panel installation where predictable cabinet loading is required.