Product Description:

The DKR03.1-W200N-BE05-03-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is designed to regulate large synchronous and induction servo axes by converting fixed mains power into variable, feedback-controlled output current, allowing presses, gantry systems, and machining centers to follow precise motion profiles. By combining power electronics, signal processing, and embedded diagnostics in one enclosure, the unit serves as the central actuator interface in a multi-axis industrial automation cell. This arrangement also allows the drive to manage torque and speed commands while maintaining coordinated motion with the rest of the machine.

A three-phase supply of 3 x AC 400 to 480 V, ±10% is rectified and pulse-width modulated at 4 kHz. At this carrier frequency, the inverter sustains a continuous armature current of 92 A, enabling a mechanical output of approximately 35 kW, and it permits up to 141 A during short transient loads before protective limits engage. Internal thermal losses total 1200 W, which helps determine cabinet ventilation requirements. Position and speed loops are closed through digital servo and resolver feedback channels, and line 03 with design version 1 uses updated gating algorithms to reduce ripple. Separate feedback paths let the controller maintain rotor position accuracy while also responding quickly to load changes during acceleration and deceleration. These operating values match the 200 current rating code used for this model, while the DC bus architecture stabilizes intermediate-circuit voltage during regenerative events and works with external braking resistors when needed.

Start-up electronics are energized from a separate AC 230 V, ±10% control supply, allowing the logic circuits to boot before the main contactor closes. Keeping the control supply separate from the mains input also allows diagnostic and communication functions to remain available during main power sequencing. Power semiconductors are cooled by a forced-air path driven by the integrated built-in air blower, so no liquid cooling loop is required. Motion commands reach the unit through the SERCOS interface, enabling synchronous setpoint exchange across multiple axes. The controller is built without a brake chopper, and excess energy is directed to shared cabinet resistors when braking demand rises. Even with these features, the enclosure mass remains 49 kg, which supports stable panel mounting.