Where can I find the figures to calculate a magntic field strength x windings to get a figure for horse power. I want to build a 3 hp permanate magnet electric motor / generator. The idea is to use perhaps 8 or more large NdFeB magnets and at least 4 coils per magnet. In a setup similar to a stepper motor. I can get the magnets for about $30 or $40 each. My problem is I don't have a clue how many I will need if I can't calculate the power I can get from such a design. Can anybody help?
Thanks in advance!
Robert Miller