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VAWT new proto-type
GoVertical:
Apparently, Vertically stacked stators for a air gap axle flux is not a new idea. Patent Storm has a few patents listed going back a couple of years. Oh well, the idea is new to me. Cheers. 8)
ghurd:
Search the board for " multiple stators ".
It's generally not considered the best use of materials.
http://fieldlines.com/board/index.php/topic,144082.0.html
Tritium's concern is valid and proven. Output will suffer without a complete flux path behind the magnets on the outer rotors.
I do look forward to the testing of the PMA.
Interesting design using common materials, and I love that.
G-
GoVertical:
Greetings, I was reading the wind speed for wattage rating for wind turbine in the USA is about 28 miles per hour. Any ideas on what load they are using???
wooferhound:
Here are some discussions about using 2 stators in wind turbines . . .
http://www.fieldlines.com/board/index.php/topic,140576.html
http://www.fieldlines.com/board/index.php/topic,137000.html
http://www.fieldlines.com/board/index.php/topic,137659.html
http://www.fieldlines.com/board/index.php/topic,132806.html
http://www.fieldlines.com/board/index.php/topic,131968.html
http://www.fieldlines.com/board/index.php/topic,132570.html
http://www.fieldlines.com/board/index.php/topic,139504.html
GoVertical:
Greetings, I completed fabrication of vertically stacked PMA's. The magnets are mounted on non-magnetic rotors. One is a 6 inch diameter with 3 stators and 4 rotors for a total of 24 coils that are wired in series. The other is a 8 inch diameter with 2 stators and 3 rotors that has 18 coils wired as a 3 phase with 6 coils per phase.
Stacking the stators vertically allows for a increase coil count while reducing the number of required magnets and does increase output at a lower RPM. So far I am very pleased with the results. I am still waiting for camera to be repaired and will post some pic's as soon as it is returned. Cheers
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