Product Description:

The DKR02.1-W300N-BA05-01-FW is a digital intelligent AC drive controller built by Bosch Rexroth Indramat for the DKR Drive Controllers series. In automated machining centers and material-handling lines, it serves as the link between the plant control system and high-power servo or spindle motors. The controller converts incoming three-phase power into regulated current and voltage so the motor can follow precise motion commands. This type of controller is intended for axes that require stable torque and speed control over a wide operating range.

The controller operates from a 3 x AC 400 to 480 V ±10% line supply, while its logic circuits use a separate AC 230 V ±10% control feed. With a current rating code of 300, it can sustain 141 A RMS at a 4 kHz switching frequency and deliver approximately 55 kW of continuous mechanical output. Short acceleration or cutting-load peaks can rise to 212 A, which helps the axis overcome inertia without immediate derating. The separate control supply keeps the control electronics isolated from the main power stage during startup and normal operation. Feedback inputs accept digital servo encoder signals or resolver signals, and the DC bus has no bleeder or brake chopper, so large regenerative energy must be absorbed by external devices. The unit is Line 02 with design version 1 and function module version 01.

Thermal performance is managed by a built-in air blower that removes 1800 W of loss heat from the power electronics. The chassis weighs 104 kg, which adds rigidity and thermal mass during sustained operation. Motion references reach the unit through an analog interface, allowing straightforward ±10 V speed or torque control from legacy CNC or PLC hardware without a fieldbus converter. This arrangement is useful where existing analog control architecture is already in place.