To my understanding this is what's used in large windmills generating 
electricity.

Filip

>Actually, there WAS an AC generator which generated a constant 60Hz output
>in spite of varying RPM input.  It did this with a rewritable rotor.
>
>Curtis
>
>Get your free newsletter at
>http://www.ezinfocenter.com/3122155/NL
>
>
>----- Original Message -----
>From: Steve Spence <[EMAIL PROTECTED]>
>
>in order to maintain 60 hz at multiple rpm's, you need to generate dc, and
>use an inverter to get ac. not many types of ac motors can be used for ac
>generators. asynchronous motors can be IIRC. dc permanent magnet motors are
>interchangeable.
>
>
>
>


-- 
---
Martin Klingensmith
http://nnytech.net/
http://infoarchive.net/



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