Product Description:

The DKR03.1-W100N-BA32-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. Designed for multi-axis installations, the device converts the plant power bus into regulated three-phase output that commands servo or spindle motors used in automated machining, material handling, and packaging cells. By coordinating torque, speed, and position, it allows high throughput and repeatable motion in demanding production environments. It serves as the regulated power stage between the facility supply and the motor while processing motion commands for closed-loop control.

Electrically, the drive accepts 3 × AC 400–480 V (±10%) for power, while its control electronics use AC 230 V with the same tolerance. At the standard 4 kHz switching frequency, the inverter can deliver a continuous armature current of 71 A and about 26 kW of mechanical power to the connected motor. The unit also carries a factory current rating of 100 A. Because it uses a rigid DC bus and has no bleeder or brake chopper, regenerated energy must be diverted by an external resistor or returned to the supply. Design version 1, line series 03, and function module version 01 identify the supplied unit.

Thermal management is handled by a built-in air blower that forces cabinet air across the heat sink, and this arrangement removes up to 900 W of losses during continuous operation. Commands enter through an analog interface, and the drive can close the speed loop using digital servo and resolver feedback from the motor. This layout supports cabinet-based installation where airflow passes directly over the cooling surfaces. Mechanical installation must account for the unit mass of 49 kg, so the mounting panel must support that load. The blower and conservative semiconductor ratings help keep internal components within operating limits when the controller is mounted in tight enclosures.