I am building a 30 ft. DI wind turbine that will rotate and produce power between 200-400 rpm. Needing a generator. I want to build a double stacked rotors and stators Permanent Magnet Generator configuration (2 ea. 10 kW ). If anyone can lead me to info on building a permanent magnet generator system that would match all of the power this turbine will produce and maybe close to the rpm, , it would be a relief. Direct drive is not necessarily a must. Thanks, Devon