Product Description:

The RD51.1-4B-160-R-V1-FW is an AC frequency converter produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. The unit serves as the central interface between the facility power supply and a three-phase motor, shaping voltage and frequency so that industrial conveyors, mixers, and pump groups can be started, accelerated, and stopped with repeatable precision. Because it is intended for cabinet installation in high-power systems, it combines power electronics, protective functions, and field wiring terminals in one enclosure. This layout keeps the drive section compact while supporting organized integration in large automation lines.

The converter has a continuous output capability of 160 kW, allowing direct connection to motors of comparable shaft rating. It accepts input voltage from 380 to 480 V and remains operational when the incoming RMS value varies by as much as ±10%. Power is supplied from a three-phase AC supply and delivered to the motor through U/f curve control, so magnetic flux stays proportional to speed without requiring encoder feedback. This control method provides predictable torque behavior across a broad speed range while helping limit electrical and thermal stress on the power components.

Heat generated in the IGBT section is removed by liquid cooling with an internal pump, which reduces the need for large external heat sinks and supports dense cabinet layouts. Rapid deceleration and overhauling loads are handled by a built-in brake chopper that diverts excess DC-link energy to a resistor bank. Input noise is reduced by an integrated mains filter, and the control electronics can remain active during power interruptions through the 24 V standby power connection for parameter retention and fieldbus monitoring. This is a Generation 1 design, and the required control software is ordered separately to match the application.