First post in these forums after studying this thread back to front for the better part of a week!
Great source of information Ã¢â‚¬â€œ unfortunately it seems to go around in circles and break off into tangents constantly, so I have had a great deal of trouble actually putting together a set of Ã¢â‚¬Å“Design restraintsÃ¢â‚¬Â.
For the record I am attempting to design and build a multi-stator (3 is the plan) axial flux motor for powering a car. IÃ¢â‚¬â„¢m not trying to build something that just Ã¢â‚¬ËœrunsÃ¢â‚¬â„¢. I am aiming to build a performance vehicle. The motor at this stage will be connected to a clutch and transmission, so gearing will be in use.
I plan to build the motor by basically filling the motor with as much Ã¢â‚¬Ëœgood stuffÃ¢â‚¬â„¢ as I can within a pre-determined size. So the thickest copper winding with as many turns as possible, with the most number of coils possible (multiples of 3 naturally), and using the strongest magnets I can afford with as little air gap as possible.
I plan to use liquid cooling on the stators.
My problem that I have is what number of poles to use. I seem to recall (I cannot for the life of me find the section in this thread!) reading that as close to 1:1, but not actually 1:1, was the best bet. Why was this again?
So if I had a 15-coil stator, then 16 would be the best number of pole-pairs?
On another note a question came up in another forum regarding control issues. The 'problem' is as follows:
The Curtis AC controllers for an example will only handle 300Hz, meaning 18 000 electric rpm. Since you have 10 pole pairs, this controller would limit you to only 1800 motor rpm.
Sorry if it has been explained already but how do you plan on tackling this problem? Is there something I am missing?