Product Description:

The RD52.1-4N-045-W-V1-FW belongs to Bosch Rexroth Indramat's RD 500 Drive Controllers series and is used in automated lines to manage motor speed and torque through closed-loop current regulation. Classified as Design Generation 1, the unit preserves mechanical interchangeability with earlier cabinet layouts while using updated control electronics. In variable-speed applications, it adjusts motor output to match changing load conditions during acceleration, steady running, and deceleration. The control architecture is intended for industrial processes that require stable speed behavior and repeatable torque response over long operating cycles. Application-specific function packages can be matched to process requirements without altering the physical device.

The controller applies field-oriented vector control, which resolves stator currents into orthogonal components so torque adjustment remains linear across the speed range. By separating torque-producing and flux-producing current components, the control method supports predictable response when load demand changes quickly. This approach also helps the drive maintain smooth regulation at low speed and under heavier torque demand. Thermal energy is removed through liquid cooling, which directs coolant across internal heat exchangers and supports continuous delivery of the rated 45 kW output. The power section accepts line voltages from 380 to 480 V and supplies matched three-phase output through a 3 x AC converter topology, providing pulse-width-modulated voltage that tracks the commanded frequency.

An external braking resistor can be connected because the drive is supplied without a built-in brake chopper. Harmonic mitigation on the mains side is handled by an integrated mains filter, which attenuates conducted emissions before they reach plant wiring and helps reduce interference on shared supply lines. During machine downtime, control electronics remain active through a separate 24 V standby power input, allowing communication and diagnostic functions to remain available when the main converter is de-energized. The permissible deviation of incoming line voltage is ±10 %, giving the unit tolerance for typical utility fluctuations without triggering undervoltage or overvoltage faults.