Product Description:

The RD52.1-5B-160-F-NN-FW is a high-power drive controller manufactured by Bosch Rexroth Indramat and included in the RD 500 Drive Controllers series. It bridges a plant's three-phase mains supply and the motor, adjusting frequency and current so that induction or synchronous machines follow commanded speed and torque profiles in automated production lines, material-handling stations, and test benches. Because it regulates both motor frequency and current, it can support equipment that needs stable speed at constant load as well as fast torque changes during starts, stops, and process transitions. This allows the drive to maintain controlled acceleration and steady operation when load demand changes during normal machine cycles.

Rated output reaches 160 kW, indicating the maximum electrical power the unit can feed to the motor windings without derating. The supply interface uses a three-phase AC converter arrangement and operates on a nominal bus of 500 V. Inside the controller, field-oriented vector control separates stator current into torque-producing and flux-producing components, improving dynamic response across the speed range. A built-in brake chopper diverts regenerated energy to an external resistor during rapid deceleration, which helps limit DC-link overvoltage during braking events. Thermal management uses forced-air cooling with integrated liquid circulation, which removes heat from the power modules during continuous operation in enclosed cabinets. This cooling arrangement supports sustained operation where ambient cabinet temperatures and repeated load changes place continuous thermal demand on the power section.

The controller is part of design generation 1, which identifies its revision within the platform. It is supplied with no optional software functions installed, so application-specific features are added separately when needed. In an RD 500 system, the unit operates with external line filters and braking resistors while higher-level PLCs send motion commands over standard fieldbus links. This arrangement keeps the power stage focused on motor regulation while the control system handles machine sequencing and supervisory functions.