Siemens 1PH8083-1AF00-2BA2 SIMOTICS M-1PH8 Compact Asynchronous Motor 3.7 kW 400 V IP55 Forced Ventilation

The Siemens 1PH8083-1AF00-2BA2 is a SIMOTICS M-1PH8 compact asynchronous motor rated up to 4.1 kW at 2200 r/min with forced ventilation (air flow DE → NDE) and IP55 protection. At 1500 r/min it delivers 2.8 kW / 17.8 Nm at 7.5 A, scaling to 4.1 kW / 17.8 Nm at 7.6 A / 480 V at 2200 r/min — a characteristically flat torque curve across the speed range.

Technical Specifications

Selection Notes

The 1PH8083-1AF00-2BA2 targets main-spindle applications where the drive system must sustain near-constant torque (17.7–18 Nm) from 1500 to 2200 r/min — a span of 700 r/min — without encoder feedback, relying on the converter's V/f or open-loop vector control. The Pt1000 winding temperature sensor allows the drive (e.g. SINAMICS S120) to implement thermal derating rather than a fixed external overload relay, which matters in duty cycles with frequent acceleration loads. Compared to 1PH8 variants with an encoder, this unit is appropriate where absolute position feedback is handled by a separate spindle encoder mounted at the gearbox or spindle nose. Choose a higher-frame variant if peak torque above 18 Nm is required; choose a lower-frame variant where mounting envelope or weight (32.0 kg) is the constraint.

Applications

This motor is sized for machine-tool main spindles: lathes, milling centers, and grinding machines where the spindle is driven via belt or gear stage and the control loop closes on the spindle rather than the motor shaft. IP55 permits installation in enclosures exposed to coolant mist. Forced ventilation maintains rated torque at low speed without oversizing the frame, which is relevant when the spindle operates at reduced speed during threading or finishing cuts.