RD52.1-4N-055-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200237
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The Bosch Rexroth Indramat RD52.1-4N-055-L-V1-FW is a drive controller in the RD 500 Drive Controllers series. It features forced air cooling and offers a rated power of 55 kW, operating with a voltage range of 380 to 480 V. The controller uses field oriented vector control and has an integrated mains filter.
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Product Description:
The RD52.1-4N-055-L-V1-FW is a drive controller in the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. As a drive controller, it regulates the frequency and voltage supplied to three-phase induction motors, allowing precise speed and torque control in automated machinery, material-handling lines, and process equipment. By varying output to the motor, it supports stable operation during changing load conditions and routine speed adjustments. Typical uses include conveyors that need smooth ramping, fans that must follow process demand, and pumps that benefit from adjustable flow without mechanical throttling.
This controller delivers a continuous mechanical output of 55 kW, matching medium-sized pump, fan, and conveyor duties. It is powered from a 380 to 480 V mains connection, and the input can fluctuate within a tolerance of ±10% without derating. The power section uses a 3 x AC converter to rectify and invert three-phase line power for variable-frequency motor excitation. Speed and torque are modulated by field-oriented vector control, which tracks motor flux in real time for high dynamic response and low steady-state error under changing load conditions. This control method also helps the motor respond smoothly to command changes across a broad operating range.
Thermal management is provided by forced air cooling, and an internal fan directs airflow across the heat sinks so the controller can run continuously in enclosed panels. To attenuate conducted emissions, an integrated mains filter is placed ahead of the converter section, which reduces the need for external EMC hardware in many installations. Control electronics remain active during power interruptions because an external supply provides 24 V standby power, keeping parameter memory and fieldbus nodes alive for an orderly shutdown. Because that supply is separate from the main power path, communication devices can remain active long enough to retain status information during short outages. The unit is supplied without a built-in brake chopper, so applications that return braking energy must use an external chopper or resistor bank.
Frequently Asked Questions about RD52.1-4N-055-L-V1-FW:
Q: What is the rated power output of the RD52.1-4N-055-L-V1-FW drive controller?
A: The RD52.1-4N-055-L-V1-FW operates with a rated power of 55 kW.
Q: What control method is used in the RD52.1-4N-055-L-V1-FW drive controller?
A: This model uses field oriented vector control as its control type.
Q: What cooling system is employed in the RD52.1-4N-055-L-V1-FW drive controller?
A: The RD52.1-4N-055-L-V1-FW features forced air cooling to manage heat dissipation.
Q: What input voltage range is required for the RD52.1-4N-055-L-V1-FW drive controller?
A: The voltage range for the RD52.1-4N-055-L-V1-FW is 380 to 480 V.
Q: Does the RD52.1-4N-055-L-V1-FW come with a built-in brake chopper?
A: This drive controller is manufactured without a built-in brake chopper.
