RAC3.5-150-460-L00-W1-2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RAC3.5-150-460-L00-W1-2 is an AC Main Spindle Drive Controller in the RAC Spindle Drive Controllers series. It features a current rating of 150 Amps, with a continuous output of 35 kW and peak output of 40 kW. The unit has built-in fan cooling, SERCOS speed command, and operates on a 3 x AC 380-460 V power supply.
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Product Description:
The RAC3.5-150-460-L00-W1-2 is an AC main spindle drive controller produced by Bosch Rexroth Indramat within the RAC Spindle Drive Controllers series. It conditions three-phase line power and supplies regulated current to high-speed spindle motors used on machining centers, grinders, and similar automation lines. Integrated SERCOS speed-command capability lets the CNC or PLC set precise acceleration profiles, while the controller’s internal vector regulation maintains stable torque across the working speed range.
The controller accepts a three-phase supply of 3 × AC 380–460 V ±10% 50–60 Hz and draws up to 150 A when full dynamic response is required. Under continuous duty, the power stage produces 35 kW while limiting the output line to 92 A; these ratings align with medium-sized spindle motors on 45 kW machine tools. A dedicated auxiliary circuit fed by AC 230 V ±10% 50–60 Hz supplies the 200 VA of control electronics, isolating logic power from the main bus. Cooling is handled by a built-in fan that exhausts through the top of the housing. The design omits an additional bleeder resistor, provides no extra encoder input, and offers no supplementary communication interface, which reduces cabinet complexity and wiring.
During rapid acceleration, the inverter can deliver a short-term output of 40 kW, and its energy-recovery channel returns up to 27 kW to the DC link during deceleration. For high-frequency machining, the manufacturer specifies a separate rating of 30 kW at an 8 kHz switching frequency, a figure that balances silicon losses with acoustic performance. The metal enclosure measures 690 × 380 × 300 mm and weighs 49 kg, allowing installation on standard control-cabinet mounting frames without additional supports. Its housing dimensions support compact placement in spindle-drive panels while maintaining space for normal cabinet installation.
Frequently Asked Questions about RAC3.5-150-460-L00-W1-2:
Q: What is the continuous current capability of the RAC3.5-150-460-L00-W1-2 spindle drive controller?
A: The RAC3.5-150-460-L00-W1-2 has a continuous current rating of 92 A for extended operation.
Q: What input power supply does the RAC3.5-150-460-L00-W1-2 require?
A: This model supports a power supply of 3 x AC 380-460 V, ±10%, operating at 50-60 Hz.
Q: How is the RAC3.5-150-460-L00-W1-2 spindle drive controller cooled?
A: A built-in fan is used to cool the RAC3.5-150-460-L00-W1-2 during operation.
Q: What is the peak output power rating of the RAC3.5-150-460-L00-W1-2?
A: The maximum peak output of this spindle drive controller is 40 kW.
Q: Which interface is used for speed command on the RAC3.5-150-460-L00-W1-2?
A: Speed command for the RAC3.5-150-460-L00-W1-2 is communicated via SERCOS interface.
