JKB, you'd better get crackin' on that running 3 phase on single phase stuff for your property. I'll need that info this year!
I have a bit more complex situation than you do. I too, would like a 100GPM baseline well, but I can only have one well on my property, which has to service all the water needs, from drawing a cup of water to filling a lined pond or tanks.
How many revolutions of a 10HP, multistage well pump does it take to fill a glass of water? Not many at all!
If I have to bang a pump that size to a frequency of 30Hz in less than 1 second, that will be a bit more than a glass of water
Motors are the weak link right now. Piece of cake for most industrial motors. (actually, I am not a big fan of cake. At my sisters birthday last weekend, she was asking everyone what kind of cake they wanted for their birthday. I said, make mine a Blueberry Pie! What a good idea, went all around! (I have 7 sisters and 3 brothers, plus many nieces and nephews) and everyone get's to pick their favorite pie for their birthday. Talk about hitting the jackpot
)
Anyway, in an open flow situation for your pond, you won't have to worry about the fine details I am dealing with. I will be making phone calls to engineers at Grundfos in the next several weeks to get more info. Their motors may be able to pull off all that BS I previously stated.
