Product Description:

The DKR03.1-W200N-BE29-02-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It serves as the power and control stage in multi-axis machining centers, modulating inverter output to govern servo motor torque and velocity according to programmed profiles. The unit is intended for closed-loop industrial automation where precise position holding is required during coordinated motion. Stable regulation helps the controller respond to changing loads while maintaining commanded drive behavior.

The controller operates with a continuous output current of 92 A at a 4 kHz PWM frequency, which is the sustained armature current available to the connected motor. At the same switching rate, it can supply up to 35 kW of mechanical power before reaching thermal limits. Commands and diagnostic telegrams are exchanged over the SERCOS interface, a deterministic fiber-optic bus used in motion systems for synchronized data exchange. Internal logic, contactors, and sensors draw power from an AC 230 V control circuit that tolerates ±10% variation, keeping the low-voltage control section supplied independently of the main power stage. Thermal management relies on a built-in blower that forces air through the heat sink.

The unit is part of line series 03 and design version 1, uses current rating code 200, accepts digital servo or resolver feedback from the motor, and uses a rigid DC bus without a brake chopper. During acceleration or shock loading, the drive can supply a peak phase current of 141 A for brief intervals. Its power section connects to a three-phase mains supply of 3xAC 400–480 V with a ±10% margin, allowing use on common industrial plant voltages. Total power dissipated as heat is 1200 W, which is relevant when planning cabinet airflow or an external heat exchanger. The unit has a transport mass of 49 kg and requires secure mounting within the drive enclosure.