Product Description:

The DKR02.1-W200B-BE11-02-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. It supplies regulated three-phase power to high-torque servo and spindle motors. The controller receives motion commands from higher-level control platforms to execute precise positioning, speed, and torque tasks in automated machining and handling lines.

The drive delivers a continuous current of 120 A at a 4 kHz switching frequency, allowing stable torque production on large axis motors during continuous duty. Its power stage supports a continuous output of 47 kW at the same frequency, which suits heavy milling spindles or gantry drives. For dynamic deceleration, it includes an internal brake resistor that can absorb 1.5 kW continuously, and the integrated bleeder circuit routes regenerated energy into this resistor without external components. Supply power is taken from a three-phase bus rated at 3 x AC 400 to 480 V with a ±10% tolerance, while the peak current capability of 141 A covers rapid acceleration or impact loads. A SERCOS interface passes setpoint and diagnostic data, and the controller accepts either digital servo or resolver feedback for closed-loop regulation. Cooling is handled by a built-in blower, and the unit is in current rating 200, Line 02, and Version 1.

The internal resistor can receive single braking events totaling 240 kWs, helping prevent DC bus overvoltage during emergency stops on high-inertia loads. Overall thermal loss from semiconductors and magnetics is discharged as 1600 W, so the blower and cabinet ventilation must remove this heat to keep components within operating limits. Auxiliary electronics, signal conditioning, and fans are supplied from a separate control voltage of AC 230 V with a ±10% window, isolating sensitive circuits from power-stage transients. The unit has a mass of 104 kg, so reinforced panel mounting and suitable lifting equipment are required during installation.