Product Description:

Bosch Rexroth Indramat manufactures the DKR04.1-W300N-BT67-01-FW as part of the DKR Drive Controllers series. It is a digital intelligent AC drive controller used to govern high-power servo or spindle motors on automated production lines. The unit provides closed-loop vector control through a rigid DC bus architecture, supporting coordinated motion tasks that require precise torque regulation and rapid acceleration. In operation, it converts incoming three-phase mains power into regulated motor current while exchanging real-time status data with central PLCs. This operating profile suits machinery that depends on stable speed control, quick response to load changes, and accurate axis coordination.

The drive operates from a rated power supply of 3xAC 400 ... 480 V ±10%, and its auxiliary control stage accepts AC 230 V, ± 10%. At a PWM frequency of 4 kHz, the inverter can deliver a continuous armature current of 185 A, which corresponds to a sustained shaft power of 82 kW. For short acceleration bursts, the current can rise to 212 A, allowing the drive to handle high inertial loads without immediate derating. The separate control supply supports internal logic and interface functions while the main power section feeds the motor. Its current rating index of 300, together with design version 1, function module version 01, and line series 04, identifies its place within this controller range.

Thermal losses reach 2250 W and are removed by a built-in air blower that directs airflow across the power semiconductors and internal heat sink surfaces. The unit has no bleeder or brake chopper, so regenerated energy must be redirected through external circuitry on the rigid DC bus. Command and diagnostic telegrams travel over a SERCOS interface, while axis encoder signals are processed through digital servo and resolver feedback circuits for precise position tracking. These feedback channels support accurate commutation, speed regulation, and position correction during dynamic motion. With a mass close to 150 kg, the enclosure supports the blower and power stack while remaining suitable for cabinet mounting.