Product Description:

The RD52.1-8C-160-R-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. The unit governs three-phase motors in automated machinery by synthesizing pulse-width-modulated output from a DC link, allowing precise speed and torque regulation across demanding industrial duty cycles. Installed in engineered cabinets, it acts as the central power stage between the plant’s rectifier section and motion axes, executing vector algorithms so that production equipment maintains repeatable motion profiles under variable load conditions. This arrangement lets the controller manage acceleration, steady running, and load changes from a single power stage. It is suitable for machinery that must keep motor response stable during frequent starts, stops, and speed changes.

Its control core employs field-oriented vector control, meaning stator currents are resolved into orthogonal components so that flux and torque are adjusted independently for dynamic response. Thermal management is handled by liquid cooling with an internal pump for 132 kW and above; the embedded pump forces coolant through the heat sink, permitting full-power operation even when cabinet air is warm. The hardware belongs to design generation 1, and this release uses that mechanical layout and connector arrangement. Application-specific functions are not stored on the base hardware, and the software is ordered separately. The option list has no installed options, so the terminals remain available for user-selected I/O or communication modules.

The inverter stage is configured as an SFT inverter and runs in RD51 SFT operation, so parameter sets developed for RD51 drives can be reused without conversion. Nominal output is 160 kW, delivered from a DC link fed by an inverter DC supply, allowing the controller to share a common bus with other RD-series inverters for energy exchange during braking events. Power devices are rated for a DC bus up to 700 V, matching high-power industrial rectifiers. The SFT inverter topology keeps wiring straightforward because both gating and protection logic are integrated on the same power stack. This layout supports coordinated operation in cabinet-based drive systems where multiple inverters exchange energy through a shared bus.