High Performance and Ultra-High Efficiency Motors for Industrial Fans

19. 12. 2021 | Karmen Nastran

Domel’s permanent magnet synchronous (PMS) motors are developed to offer and guarantee ultra-high performance at the IE5 efficiency level (and above), and a maintenance-free long lifetime.

High Performance and Ultra-High Efficiency Motors for Industrial Fans

Domel motor types NZA and ZZ are suitable to drive industrial fans.


Key features:

  • 750W up to 55 kW (from 2 Nm to 180 Nm)
  • speed up to 6,000 rpm
  • efficiency level above IE5
  • the motor is highly efficient over the whole operating range
  • use of ferrite magnets
  • top quality
  • long lifetime
  • very robust due to the high level of protection


With Ultra-High Efficiency to Reduce the Total Ownership Cost

Asynchronous motors are mostly used to drive industrial fans, especially at powers above 6 kW. The market is not so effectively covered by PMS and reluctance motors, as these require a higher initial investment. However, PMS motors have up to 40% less losses compared to the equivalent IE3 asynchronous motors due to the secondary magnetic field being generated from the permanent magnets rather than copper windings. At partial load the difference in efficiency is even higher.

Energy costs through the life cycle represent the majority of the overall operating costs. If operating costs can be reduced, profitability is increased. PMS motors guarantee high energy savings and hence reduced payback time due to much higher efficiencies compared to asynchronous motors. As an additional bonus, system also becomes more environmentally friendly.


Innovative motor construction

Domel has developed state-of-the-art motor construction, which offers the highest efficiency in small size and lightweight motors with the use of non-rare earth, ferrite magnets.

The unique electrical design enables us to offer motors with high operating speeds, up to 6,000 rpm. When increasing the speed of the motor, the difference in size and weight between asynchronous and PMS motors also increases significantly, in favour of the PMS motors.

To meet an application’s specific requirements for pressure, flow, volume, etc., variable frequency drives are often required. The majority of these drives are also capable of running PMS motors. There is thus no need to adjust the electrical part of system when using PMS motors.