Product Description:

The DKR04.1-W300E-BT53-01-FW is manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series and is part of the Digital Intelligent AC Drive Controller product group. It is used on machining centers, presses, and gantries, where it converts incoming line power into regulated three-phase output for large servo and spindle axes. The unit is part of Line 04, uses design version 1, and carries function module version 01. Communication is handled through a SERCOS interface, and the control loop uses digital servo and resolver feedback so the drive can process command values and monitor motor response during closed-loop motion.

The main power section is rated for 3xAC 400 ... 480 V ±10%, which suits common industrial supply networks in high-power motion systems. Its internal electronics are energized by AC 230 V ±10% control power, which allows the logic section to remain active even when the line supply is isolated. At a switching frequency of 4 kHz, the drive can supply a continuous armature current of 185 A and deliver 82 kW of output power for demanding axis loads. For short-duration demand, it can also reach a peak current of 212 A, which helps cover acceleration peaks and other brief load changes without changing the basic operating mode.

Thermal management uses a built-in air blower to move heat away from the IGBT stack and the external brake chopper. Under rated operation, the assembly dissipates 2250 W, so enclosure ventilation must account for the resulting heat load during continuous use. The external bleeder arrangement works with the rigid DC bus to absorb regenerated energy without feeding it back to the line supply, which is useful during deceleration of large rotating masses. A current classification of 300 supports high surge levels during braking, and the unit has a mass of 150 kg, so the cabinet structure must support a heavy installed component.