Product Description:

The RD52.1-4B-160-R-V1-FW/S100 is a drive controller produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Designed for cabinet-mounted converter systems, the unit coordinates three-phase AC motors in automated plants through precise closed-loop regulation. By processing motor feedback and modulating output voltage, it maintains stable speed and torque behavior during changing load conditions. It is suited for process lines that require repeatable motor response, steady torque delivery, and coordinated speed control across varying operating states.

The device employs field-oriented vector control, a control method that separates stator current into torque-producing and flux-producing components for accurate dynamic response. Because the controller regulates these current components independently, it can maintain smooth motor operation at low speed and during sudden load changes. A built-in brake chopper absorbs regenerated energy during deceleration and helps protect the DC link from overvoltage. Thermal management is handled by liquid cooling with an internal pump, which is suited for frames of 132 kW and above and reduces reliance on large cabinet airflow. The power section is rated at 160 kW, giving the controller the capacity to operate large induction or synchronous motors. Incoming energy is supplied through a three-phase AC converter topology that rectifies the line supply into the DC bus used by the inverter stage.

The permissible supply range is 380 to 480 V, and regulation remains within a tolerance of ±10%, allowing stable operation on utility systems with moderate voltage variation. An external auxiliary circuit provides 24 V standby power so the control electronics can remain active when the main supply is disconnected. Protective EMC performance is supported by an integrated mains filter, which reduces conducted interference without requiring additional cabinet hardware. This model is part of design generation 1, and the active low-voltage supply helps the controller retain control functions during main power transitions.