battousai Posted August 18, 2008 Posted August 18, 2008 Let's say one has a basic fan (hot wire, stator, rotor, neutral wire), and that when a current is applied from the hot wire to the neutral, the fan spins to the left. If one were to apply a current from the neutral wire to the hot wire, would the fan spin to the right?
tvp45 Posted August 19, 2008 Posted August 19, 2008 Most fans are ac, so it wouldn't matter which way you connected it. But, some small fans are dc and those will reverse when you reverse the polarity of the applied Voltage.
battousai Posted August 20, 2008 Author Posted August 20, 2008 Is there any way to reverse the direction of an ac fan?
Think it thru Posted August 24, 2008 Posted August 24, 2008 Is there any way to reverse the direction of an ac fan? Yes. As a good example almost any ceiling fan is reversible by moving the position of the forward/reverse switch.
battousai Posted August 25, 2008 Author Posted August 25, 2008 Yes. As a good example almost any ceiling fan is reversible by moving the position of the forward/reverse switch. As stated in the first post, this circuit does not include a switch. In this case, how would one reverse the direction of the ac fan? A switch can be used, but what type of switch is this? Does it have a specific name?
booker Posted August 25, 2008 Posted August 25, 2008 As stated in the first post, this circuit does not include a switch. In this case, how would one reverse the direction of the ac fan? A switch can be used, but what type of switch is this? Does it have a specific name? You're getting some erronious information. AC motors come in a variety of flavors. A motor you think is AC, might be a universal motor. I think ceiling fans have univeral motors The most common are induction motors. *Some* will spin and deliver power either way depending on how they are started. I don't think you want to go messing with their internal wiring if you have to ask how they work. Besides, the fan blade won't work reversed.
big314mp Posted August 26, 2008 Posted August 26, 2008 Is there anything that prevents you from just turning the fan 180 degrees?
booker Posted August 27, 2008 Posted August 27, 2008 Is there anything that prevents you from just turning the fan 180 degrees? Good catch, big314mp! I hadn't thougth of flipping the fan over on the shaft with the motor turning the other way. It turns the usual tractor fan into a pusher fan. This is what you were thinking, right?
big314mp Posted August 27, 2008 Posted August 27, 2008 ...flipping the fan over on the shaft with the motor turning the other way. Exactly.
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