Product Description:

The RD52.1-4N-160-R-V1-FW drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. Designed for plant-wide automation, the device converts fixed utility power into regulated motor voltage and frequency. This allows induction or synchronous machines to follow programmed speed and torque setpoints on assembly lines, material-handling stations, and continuous-process equipment. It is suitable for variable-speed duties where stable motor control is needed during changing load conditions.

It uses field oriented vector control to maintain precise flux alignment, giving linear torque response across the speed range. This algorithm decouples stator current components, improving low-speed accuracy and accelerating response times in servo-like tasks. The power section is rated at 160 kW, and it accepts a utility window of 380 to 480 V three-phase AC. The input can drift within a ±10 % margin without derating, thanks to adaptive modulation strategies. Supply connection follows the Converter 3 × AC topology, separating rectification and inversion stages for lower harmonic distortion. This control method helps the drive hold torque smoothly during low-speed operation and during load changes. These electrical parameters guide the selection of contactors, cables, and compatible motor sizes in larger installations.

For thermal management, the unit employs liquid cooling with an internal pump, a method specified for frames above 132 kW that removes heat directly from the IGBT baseplates. Direct heat removal from the power semiconductors helps reduce the need for high internal airflow within the enclosure. Dynamic braking energy is redirected to the DC link because the cabinet is supplied without a built-in brake chopper. To limit conducted interference, an integrated mains filter attenuates high-frequency noise. The control electronics remain active during mains loss through an external 24 V standby power input.