Fan systems are equipment expected to run continuously and quietly in industrial ventilation, cooling and dust-collection applications. The housing material of the AC motor that drives them directly affects both heat dissipation and noise and vibration behaviour; a cast iron housing offers a clear advantage here.

Motor Load in a Fan Application

A fan has a square-law torque characteristic, where the load rises rapidly as speed increases, so the motor must be selected at the correct power and speed for its operating point. The 4-pole 1500 rpm and 6-pole 1000 rpm motors are the preferred speed ranges for most fan applications.

The Advantage of a Cast Iron Housing

A cast iron housing damps vibration better than aluminium and spreads heat across a large surface. In fan motors that run for long periods, this keeps the winding temperature low and reduces mechanically induced noise for quieter operation.

Efficiency and Continuous Operation

Because fans usually run for most of the day, the efficiency class directly reflects on the energy bill. IE3 Premium motors, together with Class F insulation and IP55 protection, offer a safe and economical solution in continuous (S1) duty.

DRG Motors for Fan Systems

DRG Motor offers cast iron AC motors from 0.55 to 355 kW in IE3 and higher efficiency classes for fan and ventilation applications. Consult our technical team for the power and speed selection that suits your fan curve.