Probably the best type of generator would be a 3 phase generator which is easier to rectify to dc. This would be like a car alternator. I don't know if they are available in the 1500W to 2000W range. I would suspect that is what is used in hybrid powerplants. I wonder if I could rewind or modify a car alternator to get 60VDC. I could make that work with my hubmotor.
I have been looking into building a few wind generators for my workshop/living area and came across alot of plans for them on the net several use the Fisher & Paykel Washing machine motor for the generator after rewiring it Don't know if this is of any use to you they might be too larger (physically) for the application at hand but i thought i would make mention of it in case... best of luck with the venture will follow with much interest