Product Description:

The DKR04.1-W400N-BE66-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is part of Line 04, uses design version 1, and carries function module version 01. The unit works with a rigid DC bus that does not use an internal brake chopper, so no bleeder is fitted. In closed-loop operation, it regulates motor current so commanded torque, speed, and position remain stable during demanding production cycles. With a current class of 400, this controller is used in multi-axis machining centers and press automation lines to convert power and issue high-speed vector commands to large synchronous or induction motors.

The drive maintains a continuous output current of 210 A at a 4 kHz switching frequency, allowing it to sustain heavy mechanical loads without derating. At the same carrier frequency, it can deliver a continuous shaft power of approximately 93 kW, which is the available mechanical output for connected axes during normal duty. The drive accepts a mains input of 3 x AC 400 to 480 V, ±10%, while internal logic and fan circuits are supplied from a separate AC 230 V, ±10% control voltage that keeps the command electronics isolated from the power stage. For rapid acceleration or shock loads, the inverter can reach a peak output of 282 A.

Total thermal loss is rated at 2500 W, so cabinet ventilation must handle this heat together with the controller’s built-in air blower. Real-time communication is handled through the SERCOS interface, and phase positioning uses digital servo and resolver feedback from the connected encoders. This feedback arrangement allows the controller to track rotor position accurately during synchronized motion. The housing weighs about 150 kg and is typically frame-mounted inside IP54 switchgear sections where space and lifting capacity can support the unit.