Product Description:

The DKR03.1-W100N-BT04-01-FW is a drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. As a digital intelligent AC drive controller, it regulates three-phase servo or spindle motors in automated machining centers, robotics, and material-handling lines. It converts incoming power into regulated motor current so commanded motion profiles can be followed accurately during speed and torque control. This makes it suitable for machine sections that require repeatable starts, stops, and speed changes across linked axes. The unit belongs to Line 03, uses design version 1, and includes function module version 01 for coordinated multi-axis operation.

Its power section accepts a mains supply of 3xAC 400 … 480 V ± 10%, while internal electronics are energized by a separate AC 230 V ± 10% control voltage. Separate control power allows logic functions to remain supplied independently from the main power section during operation. When operated with a 4 kHz switching frequency, the drive can deliver a continuous armature current of 71 A, corresponding to a continuous mechanical output of approximately 26 kW. During that duty, the power electronics release approximately 900 W of heat that must be removed from the cabinet. Because the unit is supplied without a bleeder or brake chopper, the DC bus requires external energy-absorbing devices when braking energy must be dissipated. The current rating is class 100, which places the unit in a range suited to large induction or synchronous motors matched to this amperage.

Communication with higher-level motion controllers is established through the SERCOS interface, and motor position data can be processed through digital servo and resolver feedback channels for closed-loop control. A built-in axial blower provides air cooling, so the specified heat loss can be discharged without external heat sinks. The housing, including the fan module and bus capacitors, weighs 49 kg, which supports direct panel mounting where adequate structural support is available. Its peak current capability matches the continuous current rating, and the rigid DC link helps keep voltage fluctuations low during simultaneous axis motion.