Permanent Magnet Direct Drive Fan Motor

Cooling Tower Parts

Brand: Marley | Product Type: Cooling Tower Parts
Marley Direct Drive

Product Details:

  Available on most Marley NC towers
  Minimal maintenance
  Lower first cost
  VFD required
Proof In Performance
Direct drive permanent magnet motors are a newer technology available on most Marley NC Cooling Towers. The permanent magnet motor directly drives the fan, eliminating a number of components, including the gear drive, driveshaft, pillow block bearings and couplings, and associated installation and alignment costs.
In a belt-driven cooling tower, the motor and motor sheave supplies power to the belt, which is attached to the fan shaft by a sheave. A bearing and bushing hold it all together. This technology offers smooth and effective transmission of power between shafts, even if they are at a considerable distance. Regular belt lubrication and tensioning are required to ensure proper power transmission and cooling tower operation. Over time, as the belts stretch and wear, percent efficiency can dip to the low 90s or even lower, calling for more frequent replacement – once a year, typically. Maintenance professionals should conduct a monthly inspection to check proper belt tension and alignment, adequate lubrication, and signs of wear.

Belt drives are often employed in cooling towers with lower horsepower requirements. Like a gear drive, the belt drive does not require a variable frequency drive (VFD). The Marley Geareducer® gear drive offers a more efficient alternative that provides energy, installation and maintenance cost savings.