Product Description:

Bosch Rexroth Indramat’s RD52.1-4N-160-F-V1-FW belongs to the RD 500 Drive Controllers series and is intended for regulating three-phase induction or synchronous motors in automated production lines, conveyors, and machine tools. As a drive controller, it converts fixed-frequency line power into a variable output that matches commanded torque and speed. This allows closed-loop motion control from PLCs or motion cards while maintaining stable motor operation during load changes. The controller also adjusts motor output smoothly so driven equipment can respond accurately to changing process demands.

The unit is supplied as a 3-phase AC converter that accepts input voltage from 380 to 480 V. It tolerates line variation of ±10 %, so the internal DC link stays within its normal operating range. At the output, it can deliver up to 160 kW, which suits high-power spindle or pump duties. Motor regulation uses field-oriented vector control, which resolves stator currents into torque-producing and flux-producing components for quick dynamic response and precise low-speed performance. The controller also uses sinusoidal PWM and synchronized current sensors to keep torque ripple low and maintain smooth operation across the speed range.

For thermal management, the housing uses forced-air cooling with integrated liquid circulation, combining fan-driven airflow with an internal coolant path to move heat away from the IGBT modules and filter chokes. Braking energy is routed back into the DC link or an external resistor because the design is without a built-in brake chopper. A 24 V standby power supply keeps the control electronics active when line power is disconnected, so parameter memory and fieldbus nodes remain accessible. The line filter is integrated, which helps reduce conducted interference and simplifies panel layout. This cooling arrangement helps the controller manage heat during continuous operation under demanding load conditions.