Product Description:

The RD52.1-4N-018-D-NN-FW drive controller belongs to the RD 500 Drive Controllers series from Bosch Rexroth Indramat. It regulates the speed and torque of three-phase motors in automated equipment, converting fixed mains power into a controllable output that matches process demands. By integrating power electronics, protection, and communication interfaces in one housing, the unit simplifies cabinet layout and supports coordinated motion across conveyors, pumps, and other production lines. This arrangement allows one controller to supply stable motor operation while supporting variable-speed processes that need consistent response under changing load conditions.

The controller accepts a line voltage of 380 to 480 V, allowing installation on common industrial low-voltage networks. It provides a continuous mechanical output of 18.5 kW, making it suitable for medium-power extruders, mixers, or hoists. Motor regulation is executed by field-oriented vector control, which separates flux and torque control so the drive can maintain responsive operation even at low speed. The power stage uses a 3 × AC converter input arrangement, so the rectifier and DC link receive balanced three-phase power. Conducted electromagnetic interference is reduced by the integrated mains filter, which helps the drive operate cleanly within plant electrical systems and reduces the need for additional external filtering components.

Heat is removed by a plug-through cooler, with the heat sink passing through the cabinet wall so losses are released directly to ambient air rather than remaining inside the enclosure. The unit is supplied without a built-in brake chopper, so braking energy from decelerating loads must be handled by external equipment when the application returns power to the DC link. Electrical parameters stay within a ±10 % tolerance window, helping the controller remain stable during normal mains variation. The hardware is classified as design generation 1, indicating the first design release of this controller platform.