Product Description:

The DKR02.1-W300N-BE23-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. This unit regulates large synchronous or induction motors on automated machine tools, handling speed, torque, and position loops through its embedded control electronics. In factory settings, it serves as the central power stage between the plant’s motion controller and the motor, translating setpoints into three-phase output current for precise axis control.

The drive exchanges real-time commands over a SERCOS interface, allowing deterministic communication with CNC or PLC hosts. Under a 4 kHz switching frequency, it delivers a continuous output current of 141 A, corresponding to a sustained mechanical output of 55 kW. Internal logic and I/O are supplied from a separate AC 230 V control voltage so the device can remain active during mains interruptions. Main power comes from a three-phase network of 3×AC 400 … 480 V ±10 %, and the W300N rating code indicates a 300 A current class for short-term overloads. Cooling is provided by a built-in air blower that forces ambient air across the heat sinks. A rigid DC bus is used because the bleeder section is omitted, so external braking resistors cannot be connected. Resolver or digital servo feedback is accepted for closed-loop motor supervision, and the controller is supplied as line series 02, design version 1, with function module version 01.

The peak current capability reaches 212 A for dynamic accelerations, while total losses are expelled as 1800 W of heat that must be extracted from the cabinet. Despite its high power density, the housing and blower assembly weigh only 104 kg, easing installation into vertical racks. Cabinet ventilation must remove the generated heat, and the mounting structure must support the installed mass during operation.