Product Description:

The RD52.1-7N-132-F-M1-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. It is a three-phase AC inverter that regulates induction or synchronous motors in automated machinery by adjusting torque and speed to match process demands. Within a motion system, the controller closes current, speed, and position loops so that mechanical axes follow electronic setpoints with minimal deviation. This control structure supports stable acceleration and speed regulation in material-handling lines and other variable-speed equipment.

This model uses field-oriented vector control, so the internal processor resolves stator currents into flux-producing and torque-producing vectors for precise dynamic response even at low speeds. Thermal management relies on forced-air cooling with integrated liquid circulation; an internal blower moves air across the heat sink while coolant removes heat from the cabinet during continuous duty. The DC link accepts a bus voltage range of 530 to 670 V, which matches common 600 V rectifier sections used in central drive lineups. At its nominal rating, the unit can deliver 132 kW of mechanical power to the connected motor, making it suitable for pumps, extruders, and large conveyor drives. The controller uses a DC inverter supply, so it is fed from a front-end rectifier or a common DC bus rather than from an individual AC input stage.

Regenerated mechanical energy returns to the DC bus because the unit comes without a built-in brake chopper; an external chopper module is needed when braking peaks exceed bus limits. That arrangement is typical in centralized drive systems where regenerative energy can be shared on the common bus. It also operates without output chokes, so cable length and motor insulation must stay within the recommended limits. The unit is Design Generation 1, which matches first-generation option cards and diagnostic tools.