Product Description:

The DKR04.1-W300N-BT29-01-FW is a drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Classified as a digital intelligent AC drive controller, it governs high-power servo axes in industrial automation by converting bus energy into precisely timed phase currents for large torque motors. The unit is part of line 04, uses design version 1, and carries function module version 01. Motor position is returned by digital servo or resolver feedback devices connected to the controller's feedback ports, allowing closed-loop positioning in transfer lines, presses, and machining centers. The controller is intended for coordinated multi-axis machinery where accurate timing between command signals and motor response is critical. Its closed-loop operation helps maintain stable positioning and speed control during demanding production cycles.

Electrical performance centers on a system current rating of 300 A. Within that range, the drive delivers a continuous output current of 185 A at a 4 kHz switching frequency, which supports sustained shaft power near 82 kW. Control electronics are supplied separately from the power stage by AC 230 V ±10%, while the mains section accepts 3×AC 400 to 480 V ±10% from a three-phase grid. Using a separate control supply keeps the low-power electronics independent of the main inverter section during operation. Command words and feedback data travel over the SERCOS interface, which provides deterministic timing across multiple axes. The DC bus has no bleeder or brake chopper, so regenerated energy during deceleration must be handled externally.

During rapid acceleration, the inverter can supply a peak phase current of 212 A, giving more torque headroom than the continuous operating level. Thermal loading from the switching devices and bus bars is rated at 2250 W. This heat is removed by a built-in air blower that directs airflow across the heat sink fins. Even with the integrated blower and magnetic assemblies, the enclosure weighs 150 kg. The substantial cabinet mass should be considered when preparing the mounting surface and enclosure structure. Cabinet airflow and conductor sizing should also match the operating load of the power section.