High Efficiency Evaporator Fan Motors

Direct drive motors include condenser fan motors pedestal fan motors room air conditioner motors and unit heater motors.

High efficiency evaporator fan motors.

â a new motor technology a type of permanent magnet synchronous ac motor that can directly use grid supplied ac current without the need to rectify to dc has recently been commercialized. New style ec motors are over 60 more efficient than old style motors at high speed in low speed mode they are over 90 more efficient. Typically for commercial refrigeration evaporator fan motor applications ec motors are 66 efficient and psc motors are usually about 29 efficient. Variable speed ecm condenser fan motors are used in condensers for the high efficient models so that the fan speed for the condenser can be modulated according to the load of the system.

The ecm variable speed fan motors are used in condensers that have a modulating compressor. Higher efficiency evaporator fan motors reduce energy consumption by requiring less electrical power to generate the same motor shaft output power nci pnnl 2011. These fans run twenty four hours a day. Historically shaded pole motors have been the most commonly used evaporator fan motors in commercial refrigeration equipment and beverage vending machines.

They mount directly to the drive shaft of hvac equipment which minimizes friction during operation and increases efficiency. The end result after this efficiency upgrade is that the new evaporator fans save over 60 on electricity half the time over 90 during compressor off cycles.