RD52.1-4B-075-L-FV-FW Bosch Rexroth Indramat
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MPN: R911203407
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The Bosch Rexroth Indramat RD52.1-4B-075-L-FV-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 75 kW and supports a voltage range of 380 to 480 V with a tolerance of ±10%. It uses forced air cooling, has a built-in brake chopper, and operates with field oriented vector control. The controller comes with an integrated mains filter and features external 24 V standby power.
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Product Description:
The RD52.1-4B-075-L-FV-FW is a drive controller manufactured by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It serves as the power-conversion and regulation element in automated lines, transforming incoming three-phase mains energy into controlled output that adjusts motor torque and speed in real time. By handling vector-based current loops, the unit supports coordinated operation in conveyors, extruders, and pump drives. That closed-loop behavior helps maintain stable torque and speed when process demand changes suddenly. This layout suits industrial applications that need both continuous operation and responsive changes in motor output.
This controller delivers a nominal output of 75 kW, which supports continuous operation at that power level. Its input range of 380 to 480 V accommodates common industrial supply networks, and the permissible supply variation of ±10 % helps the unit remain stable during moderate line fluctuations. Motion processing uses field-oriented vector control, so stator currents are separated into flux-producing and torque-producing components for accurate dynamic response. This control method improves low-speed torque behavior and speed regulation compared with simpler voltage-frequency operation. A built-in brake chopper routes regenerative energy to an external resistor during deceleration, which helps protect the DC bus from overvoltage. Thermal management relies on forced-air cooling, with airflow through the heat sink to maintain semiconductor temperature under load.
The incoming feed uses 3 × AC power, and a separate 24 V standby power line keeps the control electronics active when the main bus is de-energized. The standby supply allows the control section to remain active for status retention and interface functions while the power section is off. An integrated mains filter reduces conducted emissions and supports installation in plant electrical systems with EMC requirements. Current sampling for phases U6, V6, and W6 is supplied to the control board for monitoring, regulation, and diagnostic feedback. The controller is design generation 1 and operates as a converter on three-phase AC input without an additional line reactor.
Frequently Asked Questions about RD52.1-4B-075-L-FV-FW:
Q: What braking capability is included in the RD52.1-4B-075-L-FV-FW drive controller?
A: The RD52.1-4B-075-L-FV-FW drive controller features a built-in brake chopper for dynamic braking processes.
Q: What control type does the RD52.1-4B-075-L-FV-FW drive controller utilize?
A: This model supports field oriented vector control for precise motor operation.
Q: How is the RD52.1-4B-075-L-FV-FW drive controller cooled?
A: Forced air cooling is employed in this controller to maintain optimal operating temperatures.
Q: What is the rated power output of the RD52.1-4B-075-L-FV-FW drive controller?
A: The RD52.1-4B-075-L-FV-FW has a rated power capacity of 75 kW.
Q: What supply voltage range is supported by the RD52.1-4B-075-L-FV-FW controller?
A: The voltage input range for this drive controller is 380 to 480 V with a tolerance of ±10%.
