[WyrTwister]

Originally Posted by Xringer

Brushless DC electric motor - Wikipedia, the free encyclopedia

Heating and ventilations

There is a trend in the HVAC and refrigeration industries to use brushless motors instead of various types of AC motors. The most significant reason to switch to a brushless motor is the dramatic reduction in power required to operate them versus a typical AC motor.[8] While shaded-pole and permanent split capacitor motors once dominated as the fan motor of choice, many fans are now run using a brushless motor.[when?] Some fans use brushless motors also in order to increase overall system efficiency.[9]

In addition to the brushless motor's higher efficiency, certain HVAC systems (especially those featuring variable-speed and/or load modulation) use brushless motors because the built-in microprocessor allows for programmability, better control over airflow, and serial communication.

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