I've used the search function to no avail.

I have a 12v 0.6amp PC fan that I plan on putting behind a radiator on a dirtbike. My bike delivers AC current, there's no rectifier or battery to change it. Whenever I hook up sufficient rectifiers up to the AC to turn it to DC the DC current gets high up to the 20volts line which I wouldn't want that to be connected to my 12v fan.

I decided to hook the fan just straight up to my AC (which is regulated at 11.5-13.5v) and the fan spun pretty nicely like it was on this DC battery I hooked directly up to it.

I'm wanting to know. Will it hurt for the fan to run on AC current in the long run?

Thank you.

 

I wouldn't mount it under the fuel tank..Or near a fuel line.

Your rectifier converting to 20v dc is fine. you would use a 7812 to bring it to 12vdc regulated. Up to 1amp. so for about $1us you would be done.

Here 62 cents for one:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LM7812ACT-ND

 

It's right underneath the fuel tank. The fuel tank is a thick plastic anyway.

Well. If that's all I need is just a simple little solid state 12v regulator.

Is it okay to run it on AC until my little piece arrives?

Thanks again.

 

The regulator will smoke and burn if you feed it AC. It needs a DC input voltage that is at least 2V higher than its output.