Product Description:

The DKR03.1-W100N-BE32-01-FW is an intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is intended to regulate high-power servo and spindle motors in automated machining cells, transfer lines, and other motion-centered stations. By converting incoming electrical energy into controlled motor current, the unit supports commanded speed and torque changes with the stable response required for precision motion. This type of controller is commonly used where rapid acceleration, speed regulation, and repeatable position control must be coordinated by a higher-level CNC or PLC.

Communication with the control system takes place through the SERCOS interface, so real-time command data and feedback travel on a shared fiber-optic loop. At a 4 kHz PWM carrier, the unit provides a continuous output of 71 A and supports a sustainable mechanical power level of 26 kW. The controller electronics are supplied from AC 230 V ±10 %, separating logic power from the main drive section. That arrangement keeps the control circuits energized from a dedicated source instead of relying only on the main power path. The power stage uses a built-in air blower to remove heat from the semiconductor assembly and maintain consistent operation under load. The drive accepts digital servo or resolver feedback directly, which allows it to work with common motor feedback formats used on servo and spindle axes.

Power for the DC link comes from 3× AC 400–480 V ±10 %. The unit has the lack of a brake chopper, so regenerative energy must be managed elsewhere in the system during deceleration. During operation, the controller releases up to 900 W of heat, and cabinet ventilation must be sized to remove that thermal load. Because the drive depends on cabinet airflow for heat removal, the surrounding enclosure should allow a clear path for warm air to leave the mounting area. The complete enclosure weighs 49 kg, which makes panel support and handling considerations important when the unit is mounted. The cooling assembly and power electronics are housed in one enclosure, which helps keep the overall drive layout compact.