Product Description:

The RD52.1-4B-160-R-W1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It is intended to convert fixed mains frequency into a regulated output that matches the real-time requirements of high-capacity pumps, extruders, and conveyor sections found in industrial automation. By modulating voltage and current vectors, the unit coordinates motor behavior so production equipment maintains commanded cycles, limits mechanical stress, and improves energy use in continuous and cyclic duty applications.

Closed-loop regulation is carried out with field-oriented vector control, a method that monitors stator currents and rotor flux to generate dynamic torque even at low speeds. This control method helps the drive respond smoothly to load changes and maintain stable speed during demanding process operation. The unit supplies motors with up to 160 kW of mechanical output while remaining within its wiring and thermal limits. Incoming utility power may range from 380 to 480 V, and the controller compensates for distribution swings within a margin of ±10 %. As a 3 x AC converter, it draws balanced current from all lines, which reduces harmonic distortion and eases upstream protection sizing.

Thermal stability for this power level is maintained through liquid cooling with an internal pump, so cabinet ventilation can focus on auxiliary devices rather than the drive itself. The cooling circuit removes heat directly from the power section, which helps maintain consistent output during extended operation. For rapid deceleration or overhauling loads, the integrated DC link is protected by a built-in brake chopper that diverts surplus energy into an external resistor. Conductors are landed on 95 mm² terminals 'C' and 'F', a cross-section that supports the high current associated with 132 kW and above. Clean input power is supported by an integrated mains filter, which minimizes conducted emission into the plant network.