Product Description:

The DKR04.1-W300N-BE23-01-FW is a digital AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. It belongs to Line 04, uses design version 1, and includes function module version 01 inside the housing. With a current rating of 300 A, the unit regulates large synchronous or induction motors used on gantries, presses, and machining centers. In plant-wide automation, it converts commanded motion profiles into three-phase output patterns while exchanging status data with higher-level control systems, which supports coordinated motion on heavy industrial axes.

The drive receives velocity and torque commands through a SERCOS interface, so fiber-optic cabling links it directly to motion controllers. At a 4 kHz switching frequency, the power stage supplies a continuous output of 185 A, which corresponds to roughly 82 kW when matched to appropriate motors. Control electronics operate from AC 230 V ± 10%, and thermal stability is maintained by a built-in air blower cooling path that keeps semiconductor junctions within limits. The unit uses a rigid DC bus and does not include a brake chopper, so regenerated energy must be handled on the mains side. Combined digital servo and resolver feedback options close the loop for accurate axis control and stable response during changing load conditions.

During short acceleration bursts, the inverter can reach a peak output of 212 A, permitting high torque transients without saturation. Even at those peaks, total heat dissipation is specified at 2250 W, and the integrated fans exhaust that heat through top ducting. The mains connection accepts 3×AC 400–480 V ± 10%, allowing the controller to operate from common industrial power systems. A steel enclosure that weighs about 150 kg houses the power electronics and interface modules, giving the assembly the rigidity needed for panel mounting in vibration-prone equipment. This layout also helps separate power handling components from control connections inside the cabinet.