Product Description:

The RD52.1-4B-200-R-NN-FW is a drive controller produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It supplies regulated power to three-phase motors and converts motion commands into precise torque and speed profiles for automated production lines. The controller also manages energy returned from decelerating loads, which helps stabilize operation during frequent starts, stops, and speed changes. It is suited to applications where accurate speed holding and controlled acceleration are required under changing mechanical load conditions.

This controller operates on a line voltage of 380 to 480 V and uses a three-phase AC converter input, allowing direct connection to common industrial power systems. Its nominal output capability is 200 kW, making it appropriate for large motors used in process equipment, conveyors, and similar machinery. The power stage tolerates input fluctuations up to ±10%, which helps the drive continue operating through moderate supply variation without unnecessary interruption. Motor regulation uses field-oriented vector control, which separates torque-producing and magnetizing current components to improve low-speed control and dynamic response.

Thermal management is handled by liquid cooling with an internal pump for ratings of 132 kW and above, which keeps coolant circulation independent of external plant flow arrangements. A built-in brake chopper absorbs regenerated DC-link energy during deceleration, reducing the need for separate braking hardware in many duty cycles. An integrated line filter helps reduce conducted interference returning to the supply network and supports cleaner electrical operation in shared power systems. The unit is in design generation 1, which identifies the first revision of this configuration within the product line.