RD51.1-4B-018-L-F1-FW Bosch Rexroth Indramat
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MPN: R911200417
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The Bosch Rexroth Indramat RD51.1-4B-018-L-F1-FW is a drive controller in the RD 500 Drive Controllers series, featuring a rated power of 18.5 kW and a voltage range of 380 to 480 V. It uses forced air cooling, has an integrated mains filter and brake chopper, and is designed for converter 3 x AC supply.
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Product Description:
The RD51.1-4B-018-L-F1-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as a variable-speed inverter that links a control system to an induction motor, applying a scalar voltage-to-frequency profile to match motor torque and speed to process demands. By combining power conversion, protective filtering, and thermal management in one housing, the unit is well suited for conveyors, mixers, and packaging machines where compact cabinet layouts are important. This arrangement also reduces the need for separate external components and helps simplify panel wiring.
The controller is rated for 18.5 kW of motor output and accepts input power in the range of 380–480 V. Line fluctuations are accommodated within ±10 %, helping the drive maintain stable motor magnetization when the incoming supply is not perfectly regulated. The front-end rectifier uses a three-phase AC converter topology to supply the inverter stage with DC link power. Speed reference is handled through U/f curve control, which keeps stator voltage and frequency in proportion to support torque production across a broad operating range. Because the drive uses scalar control, it is suited to applications that need dependable speed variation without more complex feedback-based motor regulation.
Dynamic braking energy is managed by a built-in brake chopper that diverts excess DC link voltage into an external resistor bank during deceleration. Thermal loading is moderated by forced-air cooling, allowing the unit to sustain output while keeping the heat sink within normal limits. Electromagnetic compatibility is supported by an integrated mains filter, which helps reduce conducted noise returning to the supply. Drive status is supported by current filter feedback (U6, V6, W6), allowing supervisory control to monitor the condition of the phase filters. These diagnostic signals can help a higher-level controller react quickly to abnormal filter conditions or phase-related faults. The unit is design generation 1.
Frequently Asked Questions about RD51.1-4B-018-L-F1-FW:
Q: Does the RD51.1-4B-018-L-F1-FW include a brake chopper?
A: The RD51.1-4B-018-L-F1-FW drive controller is equipped with a built-in brake chopper for efficient energy dissipation during braking operations.
Q: What control type does the RD51.1-4B-018-L-F1-FW drive controller use?
A: This model uses U/f curve control as its primary control method.
Q: How is the RD51.1-4B-018-L-F1-FW drive controller cooled?
A: It features a forced air cooling system to maintain optimal operating temperatures.
Q: What is the rated power of the RD51.1-4B-018-L-F1-FW drive controller?
A: The RD51.1-4B-018-L-F1-FW has a rated power output of 18.5 kW.
Q: What is the voltage range supported by the RD51.1-4B-018-L-F1-FW?
A: This drive controller operates within a voltage range of 380 to 480 V for flexible integration.
