Product Description:

The DKR02.1-W200Z-B is a Digital Intelligent AC Drive Controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. This device supplies closed-loop regulation for large servo and spindle motors used in transfer lines, machine tools, and other automation cells. Its role is to translate motion commands from the CNC or PLC into three-phase power while monitoring feedback to maintain exact speed and position. As design version 1 in line series 02, the unit uses fixed interface assignments for this product type.

At a switching frequency of 4 kHz, the power section provides a continuous output of 120 A, which is the sustained motor phase current the converter can deliver without derating. Under the same carrier frequency, it maintains 47 kW of continuous output, making it suitable for medium-size spindles that require steady torque during prolonged cutting cycles. For short accelerations, the current can rise to 141 A, giving the axis additional peak torque before thermal limits are reached. Mains connection is rated for 3xAC 400–480 V ±10%, while the control electronics are energized from a separate AC 230 V ±10% feed to isolate logic from power disturbances. The internal current rating of 200 A aligns with upstream circuit breakers in typical machine cabinets.

The thermal design relies on a built-in air blower that continuously removes loss energy and limits temperature rise inside the cabinet. Under rated operating conditions, the drive releases 1600 W of heat, so enclosure ventilation or air conditioning must account for that load. Mechanical installation must accommodate the controller mass of 104 kg, which requires rigid panel supports and secure mounting hardware. Position accuracy is supported through digital servo and resolver feedback, allowing the control loop to use the feedback type that matches the connected motor. This arrangement supports accurate speed regulation and stable position control during demanding duty cycles.