Product Description:

The DKR04.1-W400E-BE30-01-FW belongs to the DKR Drive Controllers series produced by Bosch Rexroth Indramat. It is a digital intelligent AC drive controller used in multi-axis machining centers and large transfer lines to regulate high-power servo and spindle motors with tight position and torque control. Within these systems, the controller coordinates regenerative braking, manages bus energy through an external bleeder, and exchanges real-time motion data with upper-level automation through its integrated fieldbus.

The command channel uses the SERCOS interface, allowing deterministic communication between the drive and a CNC or PLC. Under continuous duty at a 4 kHz switching frequency, the unit delivers 210 A of output current and provides a sustained mechanical power of 93 kW. Auxiliary electronics are supplied from a separate AC 230 V control voltage with a tolerance of ±10%, while the power stage accepts a mains range of 3 x AC 400 to 480 V with the same tolerance. Analog servo, digital servo, and resolver feedback channels close the control loop for precise motor positioning. This arrangement supports synchronized motion where several axes share a common DC bus and fast cyclic command updates. The drive has a current rating of 400 A, and its rigid DC bus uses an external brake chopper to dissipate surplus energy during rapid deceleration. The unit is part of line series 04, design version 1, and function module version 01.

For short transients, the controller can reach a peak output of 282 A, giving additional headroom when accelerating heavy loads. Total internal losses appear as approximately 2500 W of heat, which the unit removes through a built-in air blower. This forced-air path protects temperature-sensitive power semiconductors and supports continuous service without derating. The controller has a mass of 150 kg, so it requires rigid cabinet mounting. The external bleeder and brake chopper absorb regenerative energy during rapid deceleration, while resolver feedback helps keep axis response accurate during dynamic operating cycles.