Product Description:

The RD51.1-5B-018-D-CF-FW drive controller is produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It is designed to regulate the speed and torque of standard induction motors in automated material-handling systems and general machinery. By adjusting output frequency and voltage, the unit helps the motor follow process demands more accurately and can reduce mechanical stress on connected loads. This makes the controller suitable for applications that require stable motor control across changing operating conditions.

This model uses U/f curve control in a sensorless vector operating mode, which provides predictable torque behavior across a broad speed range without encoder feedback. Its rated output is 18.5 kW, which states the maximum continuous motor power the inverter can supply under nominal conditions. The input stage is intended for industrial three-phase supplies centered on 500 V. Deceleration energy is handled by a built-in brake chopper, so the unit can manage braking events without a separate external braking module. Heat from the power section is transferred through a plug-through cooler, which helps move thermal load away from the control cabinet interior.

The controller uses a three-phase AC mains connection, allowing balanced loading of plant transformers and protective devices. It includes the C1 + F1 function package, which combines standard speed control with added field-oriented features for pumps, fans, and conveyors. The hardware is part of Generation 1 of the RD51 platform, so it follows the parameter structure used by other first-generation modules in the same product line. The overall configuration supports reliable inverter operation in systems that need controlled acceleration, steady running speed, and repeatable stopping behavior.