Product Description:

The RD52.1-4B-160-R-M1-NN-T1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as the power-electronics interface between a three-phase supply and high-horsepower motors, converting fixed line power into regulated voltage and frequency for automated lines, presses, and material-handling equipment. The unit uses the design generation 1 platform common to this product line. That arrangement supports controlled motor operation in applications that require steady speed regulation and repeatable response under changing load conditions.

The power stage is rated for 160 kW, providing capacity for large 400 V class machines that operate continuously. The controller uses a three-phase AC input and accommodates a line window of 380 to 480 V, allowing the same unit to operate on common industrial supply systems. An allowable deviation of ±10% helps the drive remain in operation during short-term supply variation. Motor flux and torque are controlled through field-oriented vector control. By separating the magnetizing and torque-producing current components, this method supports rapid speed changes and stable steady-state operation compared with open-loop V/Hz drives.

Thermal regulation for this frame size relies on liquid cooling with an internal pump, using a closed loop to remove switching losses without drawing plant air into the cabinet. Regenerative energy produced during deceleration is dissipated through a built-in brake chopper, which removes the need for separate switching hardware. As specified by the M1 option package, the device is supplied without output chokes, which is suitable when motor cable lengths are moderate. Conducted emissions are reduced by an integrated mains filter, helping limit electrical noise on the incoming line while keeping the panel layout more compact.