Product Description:

The RD52.1-4B-132-R-NN-FW drive controller manufactured by Bosch Rexroth Indramat belongs to the RD 500 Drive Controllers series. As a three-phase AC converter, it regulates induction or synchronous motors in industrial automation lines that need high-power vector control. By delivering closed-loop speed and torque regulation, the unit forms the interface between the plant mains and the motor section. This arrangement allows the controller to supply motor power while maintaining commanded operating values during changing load conditions.

Electrical performance centers on a rated output of 132 kW, delivered from a three-phase AC converter front end fed by line voltages from 380 to 480 V. Within this range, the controller applies field-oriented vector control so the attached motor receives decoupled flux and torque commands that follow reference values precisely. Thermal energy from the power module is removed by liquid cooling with an internal pump, so cabinet airflow is not required for this cooling method. The integrated pump keeps coolant circulating through the exchanger loop and removes the need for external circulation equipment in the internal cooling circuit.

The hardware configuration includes a built-in brake chopper that diverts regenerative energy to an external resistor and helps prevent DC-link overvoltage during rapid deceleration. This arrangement is useful in applications with frequent braking events and recurring regenerative operating cycles during speed changes. An integrated mains filter attenuates conducted emissions at the converter input, simplifying compliance with plant EMC directives. This unit is classified as design Generation 1 and is manufactured with a total line voltage tolerance of ±10 %. No optional application functions are installed, and the required software version is ordered separately.