Product Description:

The RD52.1-4N-132-R-NN-FW/S110 drive controller is produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. It serves as the power and control interface between a three-phase mains supply and the motors that run conveyor lines, mixers, or other automated stations. By processing feedback and issuing precisely timed voltage vectors, the unit enables closed-loop speed and torque regulation that is necessary for repeatable industrial motion. This operating method helps the drive respond to load changes without large speed deviations during continuous industrial processes.

The controller is supplied through a 3 x AC converter front end, so it connects directly to balanced three-phase grids in the 380 to 480 V range. Internally, it is rated for 132 kW, giving it enough headroom to govern high-capacity pumps or extruders while maintaining dynamic response. That output class suits demanding process equipment that must keep torque available across a wide operating range. A field-oriented vector control algorithm modulates the output current angle in real time, which keeps the stator and rotor flux aligned and permits fast torque rise even at low speed. To move generated heat away from the power modules, the housing uses liquid cooling with an internal pump, a scheme that supports controllers at this power level and simplifies placement inside sealed cabinets. The unit can absorb voltage magnitude deviations up to ±10 % without derating, which helps facilities that experience moderate line fluctuation.

For braking energy management, the housing comes without a built-in brake chopper, so an external resistor or chopper module must be added when regenerative deceleration is required. This arrangement is useful on systems that return energy during rapid deceleration or frequent stopping cycles. Harmonic suppression on the mains side is handled by an integrated mains filter, which reduces the need for separate filter enclosures and extra cabinet wiring. The unit is Generation 1. The functions slot remains unpopulated.