Pma's for vawts should be noncogging, axial flux types.
The pma i use is single phase and has separate coils that i can wire together , all in series, or all in prarallel or any combination in between. This allows better matching of pma to vawt. I can choose high voltage low current, or high current low voltage. The coils are in free air and are not potted in resin. Our forum which is a freindly offshoot of the old vawts.net has members from vawts.net on it.
We only discuss vertical turbines. My present project is a Savonius vawt with tsr over 1.5.
We don't allow links, especially commercial ones, until you've established your bona fides, eg as not a SPAMmer.
But since your site seems aggressively unfriendly (and uncommercial) to those not prepared to hand over personal data before even looking (hmm, I'm sure that London sex shops used to be like that, but how would I know?) I've left the name but de-linked it...