RD51.1-4B-045-L-L1-FW Bosch Rexroth Indramat
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MPN: R911200970
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The Bosch Rexroth Indramat RD51.1-4B-045-L-L1-FW is a drive controller in the RD 500 Drive Controllers series. It features a built-in brake chopper, forced air cooling, and a rated power of 45 kW. This converter operates on a voltage range of 380 to 480 V with an integrated mains filter.
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Product Description:
The RD51.1-4B-045-L-L1-FW is a drive controller manufactured by Bosch Rexroth Indramat and assigned to the RD 500 Drive Controllers series. As a variable-frequency controller for three-phase induction motors, it modulates output voltage and frequency so motor speed and torque follow process demands in conveyors, pumps, fans, and other automated equipment. This operating role lets one controller support controlled acceleration, steady running speed, and deceleration without relying on fixed-speed motor operation. Because the output frequency is adjustable, the drive can match motor speed to the process instead of forcing the machine to run at line frequency at all times.
A key protective element is the built-in brake chopper, which diverts regenerated energy into a resistor during rapid deceleration to keep the DC link voltage within a safe range. Motor flux is managed with U/f curve control, a scalar method that keeps the ratio between stator voltage and frequency consistent for stable torque over a broad speed range. Heat produced by power semiconductors is removed by forced air cooling, so the unit can dissipate losses during continuous operation. An integrated mains filter helps reduce conducted emissions on the supply side. The acceptable input range of 380 to 480 V allows direct connection to common industrial low-voltage networks.
The controller is sized for applications up to 45 kW of rated power, which suits mid-range motors used in pumps, fans, and conveyor systems. Power is received through a three-phase AC input, so no upstream transformer is needed when the available supply matches the stated voltage class. Input fluctuations are handled within a ±10% tolerance, which helps the drive remain stable when plant voltage varies during operation. Diagnostic functions include cable damping feedback (C3, D3); the drive monitors the effects of long motor cables and compensates for voltage drop at the motor terminals. This is useful where cable length can influence the output waveform and the voltage seen by the motor.
Frequently Asked Questions about RD51.1-4B-045-L-L1-FW:
Q: Does the RD51.1-4B-045-L-L1-FW drive controller include a brake chopper?
A: The RD51.1-4B-045-L-L1-FW features a built-in brake chopper for efficient braking energy management.
Q: What type of control does the RD51.1-4B-045-L-L1-FW support?
A: This model uses U/f curve control as its control type.
Q: How is the RD51.1-4B-045-L-L1-FW drive controller cooled?
A: Forced air cooling is utilized to maintain operating temperature for this drive controller.
Q: What is the rated power output of the RD51.1-4B-045-L-L1-FW?
A: The RD51.1-4B-045-L-L1-FW has a rated power of 45 kW for high-capacity industrial applications.
Q: What is the supported supply voltage range for the RD51.1-4B-045-L-L1-FW drive controller?
A: Supported input voltage for this drive ranges from 380 to 480 V with a ±10% tolerance.
