RAC 3.5-150-460-APS-W1-220 Bosch Rexroth Indramat
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MPN: R911256097
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The Bosch Rexroth Indramat RAC 3.5-150-460-APS-W1-220 is an AC main spindle drive controller and part of the RAC Spindle Drive Controllers series. It operates with a rated current of 150 Amps and supports a rated connection voltage of 3 x AC 400 V at 50 Hz or 3 x AC 460 V. This controller features a high-resolution INDRAMAT encoder and an internal blower for cooling.
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Product Description:
The RAC 3.5-150-460-APS-W1-220 is an AC main spindle drive controller manufactured by Bosch Rexroth Indramat for the RAC Spindle Drive Controllers series. It functions as the power interface between a CNC control and a high-speed machining spindle, translating low-level velocity references into three-phase drive currents. In milling, drilling, and grinding systems, the unit supplies regulated torque so the spindle can follow programmed speed profiles with stable operation over repeated cycles. The controller is intended for spindle applications where torque demand changes with tool engagement and material load. Its closed-loop operation helps keep commanded speed consistent during machining.
The drive has a rated output of 150 A, allowing it to energize large motor windings during heavy chip-removal work. The power stage accepts 3 x AC 400 V ±15% or 3 x AC 460 V at 50 Hz, while the control section uses a separate AC 230 V supply at 50 to 60 Hz to isolate logic circuits from switching noise. Velocity commands enter through an analog (±10 V) input that scales spindle speed linearly with the reference voltage. This input suits direct speed references from compatible CNC controls and other analog command sources. System setup and diagnostics are handled through an RS-232-C serial port, and an additional encoder input is available for closed-loop spindle feedback. Because the drive is supplied without an additional bleeder resistor, regenerated energy must be dissipated externally or by the connected motor load.
Thermal stability is maintained by an integrated internal blower that moves cooling air across the heat sinks during prolonged high-current duty. Field conductors terminate on the X4 9-pole connector, which consolidates power, feedback, and command wiring in one location. Rotor position is resolved through a high-resolution INDRAMAT encoder channel, permitting exact phase alignment even at low speed. This feedback supports accurate phase alignment during startup and stable regulation at low spindle speeds. The controller is in series 3 and is Version 5.
Frequently Asked Questions about RAC 3.5-150-460-APS-W1-220:
Q: What is the rated current capacity of the RAC 3.5-150-460-APS-W1-220 spindle drive?
A: The RAC 3.5-150-460-APS-W1-220 operates with a rated current of 150 A for the spindle drive.
Q: What type of encoder is used in the RAC 3.5-150-460-APS-W1-220?
A: This drive controller uses a high-resolution INDRAMAT encoder to provide precise spindle feedback.
Q: How is the RAC 3.5-150-460-APS-W1-220 spindle drive cooled?
A: Cooling is handled by an internal blower or built-in fan in this model.
Q: Which type of additional interface does the RAC 3.5-150-460-APS-W1-220 feature?
A: The controller provides a serial RS 232-C interface for additional connectivity.
Q: What is the rated connection voltage for the RAC 3.5-150-460-APS-W1-220 spindle drive?
A: The RAC 3.5-150-460-APS-W1-220 has a rated connection voltage of 3 x AC 400 V, 50 Hz, +/-15% or 3 x AC 460 V.
