Product Description:

The DKR04.1-W300E-BA03-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. Within a multi-axis automation cell, the unit converts the three-phase supply into controlled output that regulates torque and speed on large synchronous or asynchronous motors. Line identifier 04, version 1, and function module code 03-01 place this model in the fourth design line with the third function package. An external bleeder with an integrated brake chopper connects to the rigid DC bus so regenerated energy can be dissipated during rapid deceleration. The analog command interface allows direct connection to PLC analog outputs for setpoint transmission.

Rated mains input spans 3 x AC 400–480 V ±10%, while the control electronics are powered separately by AC 230 V ±10% so logic can remain active during main contactor switching. At a 4 kHz pulse frequency, the inverter can deliver a continuous output of 185 A, corresponding to approximately 82 kW of mechanical shaft power when matched to a suitable motor. Momentary overload is managed through a peak current limit of 212 A, which supports quick acceleration of high-inertia loads. Closed-loop regulation is supported by Digital servo and resolver feedback, allowing the controller to process either encoder format without an additional interface card. The 300 A current class is used for upstream protection and cabling selection.

An internal built-in air blower supplies forced cooling across the heat-sink channels, and the arrangement expels up to 2250 W of thermal loss into the cabinet airflow. Combined with the external bleeder, this cooling arrangement helps keep semiconductor temperatures within operating limits during regenerative cycles. The chassis weighs about 150 kg, so the mounting panel must be reinforced before installation. Cabinet layout must also allow for the generated heat and the space needed for analog control wiring.