RD51.1-4B-030-L-LV-FW Bosch Rexroth Indramat
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MPN: R911201090
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The Bosch Rexroth Indramat RD51.1-4B-030-L-LV-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 30 kW. It features U/f curve control, forced air cooling, and a built-in brake chopper. The device supports a voltage range of 380 to 480 volts and includes an integrated mains filter.
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Product Description:
The RD51.1-4B-030-L-LV-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Positioned between a three-phase supply and an induction motor, it converts fixed mains power into a regulated output that matches real-time load demand. In automated plants, the unit handles acceleration, steady-state speed, and deceleration under PLC command, letting conveyor, pump, and fan systems run with consistent torque while minimizing mechanical stress and energy use. This type of control is well suited to applications where smooth speed changes are more important than high-precision positioning.
Electrically, the controller accepts line voltage in the range of 380 to 480 V through a three-phase AC converter input stage. Within that window, it maintains output within ±10% of the set value to protect the motor from overexcitation or underexcitation. The power section is rated for 30 kW, supporting medium-frame machines that operate for long duty cycles. Speed and flux are regulated by U/f curve control, a scalar method that keeps magnetizing current constant by scaling voltage and frequency proportionally, which improves low-speed stability and helps prevent core saturation during light-load operation.
Several integrated functions enhance reliability during normal operation and rapid stopping. A built-in brake chopper diverts regenerated energy to an external resistor, preventing DC-bus overvoltage during deceleration. Heat generated in the IGBT stack is removed by forced air cooling, allowing full current delivery without thermal derating. Conducted emissions toward upstream switchgear are reduced by an integrated mains filter. Control electronics can remain powered when the main link is disconnected by supplying 24 V standby power from an external source, which helps the unit stay responsive to control commands during brief main-power interruptions. Support for cable damping feedback on long motor leads helps maintain stable operation when motor wiring must be routed over greater distances, and the unit uses the first hardware generation of this platform.
Frequently Asked Questions about RD51.1-4B-030-L-LV-FW:
Q: What is the rated power of the RD51.1-4B-030-L-LV-FW drive controller?
A: The RD51.1-4B-030-L-LV-FW drive controller has a rated power output of 30 kW.
Q: What is the input voltage range for the RD51.1-4B-030-L-LV-FW?
A: This model supports a voltage range from 380 to 480 volts for operation.
Q: Does the RD51.1-4B-030-L-LV-FW include a brake chopper?
A: The RD51.1-4B-030-L-LV-FW is equipped with a built-in brake chopper for energy handling during braking.
Q: How is the RD51.1-4B-030-L-LV-FW cooled during operation?
A: Forced air cooling is used to maintain optimal operating temperature for this drive controller.
Q: Does the RD51.1-4B-030-L-LV-FW come with an integrated mains filter?
A: An integrated mains filter is included in the RD51.1-4B-030-L-LV-FW for reducing electrical noise from the supply.
