Product Description:

The DKR03.1-W100N-BE43-02-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat and assigned to the DKR Drive Controllers series. It is part of line 03, design version 1, and uses function module 43 with current class 100. The product supplies regulated three-phase power for large servo motors in automated machining centers, presses, and material-handling cells. By converting plant mains power into a controlled DC link and synchronized output stages, the device carries out vector commands from higher-level motion systems. It is intended for applications that require coordinated acceleration, steady speed regulation, and repeatable axis response.

Drive communication is handled through the SERCOS interface, so cyclic setpoints and parameters move over a single fiber-optic pair. This communication method also helps reduce the effect of electrical noise in drive cabinets. At a switching frequency of 4 kHz, the unit can deliver a continuous current of 71 A, corresponding to roughly 26 kW of mechanical power. Its peak current matches the continuous rating, so the controller is sized for sustained load rather than short bursts. The power section accepts 3xAC 400-480 V ±10%, while the control electronics use a separate AC 230 V auxiliary supply. Digital servo and resolver feedback channels are supported, allowing the controller to close torque, speed, or position loops with the selected motor.

Thermal energy created by the switching devices is removed by a built-in blower, and total loss is rated at 900 W, so cabinet ventilation must carry away that heat. The housing weighs 49 kg, so the mounting surface must support a relatively heavy drive module. A rigid DC bus without a brake chopper requires braking energy to be dissipated externally or regenerated upstream. Because the unit does not include an internal bleeder, deceleration must be managed by the connected power system. This arrangement is suited to systems that already provide external energy handling on the DC bus.