Since day one all types of electrical power has been subsidized, get over it. The old toys that were nothing but a car alternator had inverters, there was no realiable way to control their speed. The larger modern ones can controle their spin speed because the blades rotate and just like a prop on a big plane. http://www.google.com/url?sa=t&source=web&cd=5&ved=0CEkQFjAE&url=https%3A%2F%2Fnetfiles.uiuc.edu%2Fmragheb%2Fwww%2FNPRE%2520475%2520Wind%2520Power%2520Systems%2FModern%2520Wind%2520Generators.pdf&ei=JllYT_LcI4-utweKy6zxDg&usg=AFQjCNE2A08EGr8zk9mwrRMJaVkj6H0uOw
Thank you for the link to the PDF of generator specs, that’s ideal. As I thought, all the generators described there are asynchronous variable speed with power frequency conversion to match the line 60hz.
Fascinating reading... I’m an electrical engineer (among other things) so I’ve got lots to enjoy in that document. Thanks again!