I am shopping for ceiling fans and I am see adds for fans that have DC motors that are rated and advertised for a lot more efficiency.
Just don't understand why a DC motor would be much more efficient that AC ?
Any help is appreciated.
Thank You.
Ceiling fans: AC vs DC
Jun 26, 2020
Last reply: 6 years ago
6 Replies
DC motor is 30% more efficient due to the secondary magnetic field being generated from the permanent magnets rather than copper windings.
Does that add alot of weigh to the fan motor ?
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Good Article ... Thank You.
Also factor in that whatever the percent savings, they are a pretty small load to begin with, the lower the speed the less power, factor in how many hours you actually use it. Using an energy efficient motor on an air handler or pool pump can make some noticeable difference in your electric bill. A typical ceiling fan, used occasionally, not so much.
Most people have those ceiling fans on a lot if they ever actually turn them off but usually al low or medium speed. That may be where some old school ac motors are least efficient and a smarter design could make some difference but we are talking about pennies.
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