Product Description:

The DKR02.1-W300N-BT70-01-FW is an AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Classified as a Digital Intelligent AC Drive Controller, it is installed in automation cells to modulate large servo and spindle motors used on machining centers and gantry stages. The device carries line series 02, design version 1, function module version 01, and a current rating of 300, placing it near the top of the family’s power range. The unit uses a rigid DC link because it operates without a bleeder or brake chopper, and it can close velocity and position loops with incoming digital servo or resolver feedback signals.

Fieldbus communication is supplied through the SERCOS interface, granting deterministic command cycles to the motion controller. At a 4 kHz switching frequency, the power stage sustains a continuous output of 141 A, and this electrical headroom supports a mechanical output of 55 kW for heavy-duty axes. Auxiliary electronics are energized by an AC 230 V ±10% control supply, segregated from the mains to protect signal hardware. Thermal management relies on a built-in air blower, which directs cabinet air across the IGBT stack and keeps junction temperatures within safe margins during prolonged high-current operation.

For short acceleration bursts, the inverter can deliver up to 212 A peak, giving machines the torque reserve required for rapid indexing. Power terminals accept a factory mains range of 3xAC 400–480 V ±10%, so transformers are unnecessary in most plants. Under rated load, the module releases 1800 W of heat, and that value is important when sizing enclosure ventilation. Despite its power density, the controller’s chassis weighs 104 kg, so installation requires hoisting equipment and a reinforced mounting panel. These operating limits describe the unit’s expected use in high-power industrial motion systems.