Product Description:

The Bosch Rexroth Indramat RD41.1-6B-100-L belongs to the RD 500 Drive Controllers series and functions as the power conversion and control stage between a three-phase mains supply and an asynchronous or synchronous motor. Within an automation cell, the unit modulates voltage and frequency so that connected machinery can start, stop, or reverse with repeatable acceleration and positioning. It gives the control system a stable way to regulate motor speed and direction during routine operation and controlled stopping.

This controller is designed for a nominal three-phase input of 400 V AC, and the supply may vary by ±15% without loss of regulation. It accepts grid frequencies of 50/60 Hz, allowing deployment in facilities that follow either IEC or NEMA standards. Internally, an unregulated DC link is produced, and its continuous current rating of 200 A is the thermal limit for the converter section. That bus powers an inverter stage able to deliver a mechanical shaft output of 100 kW under rated conditions. Short-term overload events are handled by a 1.5-times current margin for 60 seconds, giving drives and conveyors headroom during acceleration or product jams. A built-in brake chopper monitors link voltage and diverts excess energy to an external resistor so that the DC link does not rise above permissible limits during rapid motor deceleration.

Thermal stability is maintained by forced air cooling, and a minimum 100 mm clearance above and below the heatsink keeps airflow unobstructed. When dynamic braking is required, the external resistor must not fall below 3.75 Ω so the chopper can dissipate regenerated power safely. The steel housing measures 240 mm in width, 360 mm in depth, and 500 mm in height, letting it fit standard control cabinets while still providing room for cable bending radii. Shipping mass is 36 kg, and the vertical orientation of the cooling channels means the unit should be mounted upright for proper convection assistance. This layout also helps the drive manage repeated deceleration cycles in applications that use frequent speed changes.