Motor Cooling Fans
Forced cooling fans for variable-speed (VFD) motors, 300–13,200 m³/h, 1–3 kW, 60–73 dB(A), keeping motors cool across the full speed range. Final selection is confirmed at the duty point (airflow / static pressure / voltage / control mode) and by project verification.
Motor Cooling Fans — selection guide
Motor Cooling Fans: 30 models, maximum airflow 300–13,200 m³/h, across 0 series.
Forced cooling fans for variable-speed motors keep VFD-driven motors within temperature when the shaft fan no longer moves enough air at low speed: the LW-G line (LW-G250 to LW-G355 and larger) is matched to IEC motor frame sizes, 300–13,200 m³/h with 1–3 kW motors on 380 / 220 V, and runs at constant speed independent of the driven motor.
How to select from this range
- Match the fan to the motor frame size and the cooling airflow required across the ribs.
- Check the auxiliary supply — voltage and phase — since the fan runs independently of the main motor.
Where these fans are used
- VFD-driven AC motors
- Traction and crane motors
- Test benches
Curves marked “measured” come from our own test rigs per AMCA 210 / ISO 5801 methods; digitised catalogue curves are flagged as such in the selector — see the test labs and certificates. Final selection is confirmed at the duty point and by project validation.
FAQ — Motor Cooling Fans
Which motor frame sizes are covered?
The LW-G number is the frame class (250, 280, 315, 355 and so on); the model data lists the matching IEC frame and mounting. Adapters for other frames on request.