RD51.1-4B-003-L-VY-FW Bosch Rexroth Indramat
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MPN: R911201006
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The Bosch Rexroth Indramat RD51.1-4B-003-L-VY-FW is a drive controller in the RD 500 Drive Controllers series. It offers a rated power of 3.0 kW with a built-in brake chopper and integrates a mains filter. This unit features U/f curve control, operates on 3-phase AC with a voltage range of 380 to 480 V, and utilizes forced air cooling.
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Product Description:
The RD51.1-4B-003-L-VY-FW is a variable-speed drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It modulates the voltage and frequency supplied to three-phase induction motors so machinery can start smoothly, change speed on demand, and hold a commanded set point without mechanical gear changes. By converting fixed input power into a controlled output waveform, the unit serves as the central actuator in pump, fan, and conveyor automation where adjustable torque and energy use must be managed in real time. This method of control helps reduce mechanical shock during startup and stopping, and it allows process speed to match changing load conditions.
The controller is rated at 3.0 kW, meaning it can deliver this continuous output to the connected motor group. It accepts line power from 380 to 480 V and tolerates supply variation of ±10 % without derating. Because it is a 3 x AC converter, it first rectifies the incoming three-phase supply and then synthesizes a variable-frequency AC output on the inverter side. Speed regulation follows U/f curve control, which maintains a proportional ratio between voltage and frequency to help prevent motor saturation while keeping torque consistent across the speed range. This control approach is commonly used with general-purpose induction motors where stable speed adjustment is needed without added feedback hardware.
Thermal limits are managed by forced air cooling; an internal fan drives ambient air across the heat sink to keep semiconductor temperatures within safe limits. A built-in brake chopper is provided to dissipate excess DC-bus energy into an external resistor during rapid deceleration, which is useful when the load returns energy during stopping. Conducted emissions are reduced by an integrated mains filter, which helps limit electrical noise returned to the supply network. The parameter set includes the Y1 + V1 combination function package, enabling predefined logic and velocity functions without extra hardware.
Frequently Asked Questions about RD51.1-4B-003-L-VY-FW:
Q: Does the RD51.1-4B-003-L-VY-FW have a brake chopper included?
A: This model features a built-in brake chopper for safe and efficient braking of connected motors.
Q: What is the rated power output of the RD51.1-4B-003-L-VY-FW drive controller?
A: The RD51.1-4B-003-L-VY-FW provides a rated power output of 3.0 kW.
Q: What is the supported voltage range of the RD51.1-4B-003-L-VY-FW?
A: This drive controller supports a voltage range from 380 to 480 V for flexible power supply options.
Q: Is a mains filter built into the RD51.1-4B-003-L-VY-FW?
A: An integrated mains filter is included in this drive controller to minimize electrical noise.
Q: What type of cooling does the RD51.1-4B-003-L-VY-FW utilize?
A: The RD51.1-4B-003-L-VY-FW uses forced air cooling to maintain its temperature during operation.
