Product Description:

The RD51.1-4B-045-L-CF-FW is manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as a speed-adjustable power stage for induction-motor-based machinery, converting incoming line power into a regulated output that matches the torque and speed requirements of automated production lines, material-handling conveyors, and process pumps. By varying motor output in a controlled way, it supports smoother starts, adjustable operating speed, and controlled deceleration in equipment that would otherwise run at a fixed line frequency. This makes it suitable for applications where motor speed must follow process demands rather than remain constant.

Key performance features include its built-in brake chopper, which absorbs regenerative energy during rapid deceleration so external resistors are unnecessary. Motor excitation uses U/f curve control, providing constant flux over the frequency range for stable torque on standard squirrel-cage motors. Thermal management relies on forced air cooling, and the integrated fan moves cabinet air across heat-sink fins to maintain semiconductor temperatures. The unit can deliver up to 45 kW of mechanical power to the motor shaft when operated within its 380 to 480 V three-phase input range. That operating range suits common industrial power systems. It also helps the drive support medium-duty machinery without exceeding current or thermal protection limits.

An integrated mains filter helps reduce conducted emissions, and a supply tolerance of ±10 % supports operation during normal line variation. The Combination C1 + F1 option set adds application-specific functions, while the converter 3 x AC input structure matches common three-phase plant distribution. This is version 1 of the design. The drive is intended for automation systems that need compact motor control with built-in protective functions. Its input and filtering arrangement also help it fit into standard industrial cabinets without requiring separate external filtering hardware in many standard installations. It can be integrated into production equipment that requires stable motor response over changing operating conditions.