Product Description:

The DKR02.1-W200B-BE09-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat as part of the DKR Drive Controllers series. It supplies regulated three-phase power to servo and spindle motors, enabling coordinated torque, speed, and position control in automated machine tools, material-handling cells, and other industrial motion platforms. This combination allows one controller to support both speed-regulated spindle functions and precise servo positioning within the same automation platform. The input side tolerates three-phase line variation within 3×AC 400–480 V ±10%, so the controller remains stable on utility supplies with modest voltage swings.

The drive requires a control supply of AC 230 V ±10% for its logic and blower circuits. Under a 4 kHz switching pattern, it delivers a continuous output current of 120 A, while its internal power stage can sustain about 47 kW of output power without derating. Thermal energy generated by the IGBTs and brake resistor is removed by a built-in air blower, and total heat dissipation of 1.6 kW must be routed out of the cabinet. Communication with the motion controller is handled over the SERCOS interface, and the feedback channel accepts both digital servo and resolver signals for closed-loop operation. An internal bleeder dissipates excess DC-bus energy locally during regenerative events. The product is in line series 02, design version 1, with current rating 200 and function module version 01. The housing weighs about 104 kg.

The braking subsystem uses a brake resistor rated for 1.5 kW of continuous dissipation. Its maximum energy capacity is 240 kWs, which helps limit DC-bus overvoltage during rapid deceleration. For short acceleration bursts, the inverter supplies a peak current of 141 A, giving the machine additional torque headroom beyond the continuous current rating. This arrangement helps the drive manage returned energy during fast stopping cycles without excessive rise in bus voltage.