Product Description:

The DKR04.1-W300 belongs to the DKR Drive Controllers series manufactured by Bosch Rexroth Indramat. It is a digital intelligent AC drive controller intended to coordinate high-power servo or spindle axes in automated machinery. In these systems, the controller regulates motor current so commanded speed and torque can be applied consistently during demanding motion tasks. This type of controller is typically used where large motors must respond smoothly to changing load conditions and sustained output demand. The unit is part of line 04 and is design version 1, placing it in the fourth design generation of this product family without changing its intended application.

The drive connects to a mains supply of 3xAC 400 … 480 V ±10% and uses a separate control circuit that accepts AC 230 V ±10%. This split supply arrangement keeps the control electronics on their own input while the power stage handles the higher main line voltage. At a switching frequency of 4 kHz, the power stage can deliver a continuous output of 185 A, which corresponds to about 82 kW of constant mechanical power at the connected motor. Transient acceleration or deceleration events are handled through a peak capability of 212 A. The drive is assigned to the 300 current class for this frame size.

Thermal management is performed by a built-in air blower, and cabinet layout must accommodate a total heat loss of 2250 W to avoid derating during extended duty cycles. The housing and heat sink assembly bring the installed mass to 150 kg, so the controller requires rigid mounting rails or reinforced panels. This installed weight also affects cabinet design because the supporting structure must carry the static load securely during operation. Clearance around the cooling path helps the blower move heat away from the power section. Its size and cooling method suit fixed cabinet installation where adequate structural support and airflow are available.