As the motor drives the permanent magnet synchronous motor (PMSM) fan's direct drive, it saves the reducer link. It has no gear and high speed running bearings, so no replacement of oil is needed, and the reduction of the gear and bearing replacement maintenance is not required. It has removed the maintenance and has dramatically improved the service life of the large industrial fan. This brings a more reliable experience for the user.
The use of rare earth metal as the outer rotor of the large industrial fan of permanent magnet synchronous motor, as long as the temperature of the motor is controlled effectively (use the traditional type environmental temperature), the life of the motor can be infinitely increased, this reduces the investment amount.