Product Description:

The Bosch Rexroth Indramat RAC3.1-150-460-A00-W1-220 is an AC main spindle drive controller that belongs to the RAC Spindle Drive Controllers series. It is used in industrial automation to regulate the speed, torque, and regenerative functions of high-power machine-tool spindles, providing closed-loop control between the supply network and the motor load. Control is achieved through the analog speed input and the standard enable, ready, and fault lines.

This controller delivers a continuous current of 92 A, allowing it to supply motors that draw steady high amperage without thermal overload. Its continuous output power is rated at 35 kW, while the continuous regenerative channel returns up to 27 kW of braking energy to the DC link. Internal electronics require only 200 VA of control power, and these circuits are energized from a 220 V AC control supply. Cooling is handled by a built-in fan that maintains a minimum airflow of 300 m³/h against a system back pressure of 160 Pa, so the heat sinks remain within safe operating limits. The unit is shipped without additional encoder input and has no auxiliary communication interface, so feedback and networking are limited to the standard spindle channels.

For short acceleration bursts, the drive can reach a peak output of 40 kW, and it can absorb the same magnitude as peak regenerative power during rapid deceleration. Positioning accuracy is supported by a resolution of 1/4,000,000 rev, which enables fine interpolation when the host CNC issues analog ±10 V speed setpoints. A mass of 49 kg provides mechanical stability inside the cabinet, and the housing carries a protection category of IP10, which means it has finger-safe openings but no shielding against dust or liquids.