Product Description:

The DKR02.1-W300N-BA53-01-FW belongs to the DKR Drive Controllers series from Bosch Rexroth Indramat. It is a digital intelligent AC drive controller that supplies regulated three-phase power to high-torque servomotors in automated transfer lines, metal-cutting centers, and material-handling gantries. Acting as the intermediary between plant mains and the mechanical axis, the unit receives velocity or position references from a motion CPU and precisely modulates its IGBT bridge so that motor torque follows the command profile. The architecture supports resolver or digital servo feedback to maintain tight loop accuracy even under changing mechanical load.

With a switching frequency of 4 kHz, the controller supplies a continuous output current of 141 A, translating to approximately 55 kW of mechanical power for matched motors. The mains control electronics are powered from a single-phase feed of AC 230 V ±10%, while the power section accepts a three-phase line of 400–480 V AC ±10% and can reach a peak output of 212 A for rapid acceleration. Command signals enter through an analog interface, and motor position is returned through digital servo or resolver channels, enabling real-time current vector adjustment. Internal gating is coordinated for a nominal current rating index of 300, which places the unit near the upper end of the DKR family.

Thermal management relies on a built-in air blower that removes up to 1800 W of loss heat from the heat sinks, allowing full-load operation without external air ducts. Because the DC link is a rigid DC bus with no brake chopper or bleeder resistor, excess regenerative energy must be handled at the machine level. The controller’s metal housing weighs about 104 kg. The overall assembly corresponds to line series 02, design version 1, and function module version 01.