Gold Member Since 2014
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Zhongshan United Star Electrical Appliance Manufacturing Co., Ltd.

Stand Fan, Ceiling Fan, Box Fan manufacturer / supplier in China, offering 56′′dc Solar Ceiling Fan, 24"Ceiling Fan (WHITE COLOR), DC Stand Fan and so on.

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Ceiling Fans with DC Motors. [Mar 10,2015]
Ceiling Fans with DC Motors.

Revolutionary new technology that makes ceiling fans over 70% more efficient!
How Do DC Fans Work?
1.The DC motor starts up when a small electric current is passed through a magnetic field coil. The resulting magnetic force producing the torque that turns the motor repeatedly.
 
2.The specific type of DC motor used in ceiling fans is a brushless DC motor,(aka synchronous DC motor). A DC motor uses an internal array of magnets of opposing polarity. This creates a magnetic field that creates the torque required to rotate the motor's rotor. This process requires less electrical energy, translating into a 70% or greater reduction in power consumption over standard AC motors.
 
3.This energy efficient process keeps the motor cool, effectively improving the fan's life span. Noise is virtually eliminated. And the overall assembly is much more compact than standard, making for a smaller and lighter product.
The only real disadvantage of DC motor ceiling fans is the initial cost, as they require a pricier, more complicated electronic speed controller to run. However, the price increase is not as painful as you might think and is more than balanced by the many more years of usable service.
While still relatively new, the best part for consumers is that energy efficient fans with DC motors are now available in a wide range of modern designs, conceived by an ever-growing pool of quality ceiling fan manufacturers. Depending on whatever complementary lamping they might have, the majority of these qualify as Energy Star ceiling fans.