Cody if I understand it right what they are suggesting is that the coils output is pulsed. There is no input power to the coil except that of induction due to passing magnetic flux. The coil is connected to its load (whether battery or capacitor or other) at the correct time in relation to the rotating fields. This is so there is not a direct short at all times as well. The Kozen page looks good.
But you are correct, what does make these motors super efficient is resonant switching of inductors and the correct utilisation of the charges that follow.
BTW I am working on the window motor at the moment, and I noted many things that Luc also noted in regards to his bi directional resonant setup. The circuit Ive been using is almost identical in its operation. When he is ready to apply that switching to a motor he is in for a lot of fun!
Patmac,
I would also try a commutated version, you may find that your results are even better!
But you are correct, what does make these motors super efficient is resonant switching of inductors and the correct utilisation of the charges that follow.
BTW I am working on the window motor at the moment, and I noted many things that Luc also noted in regards to his bi directional resonant setup. The circuit Ive been using is almost identical in its operation. When he is ready to apply that switching to a motor he is in for a lot of fun!
Patmac,
I would also try a commutated version, you may find that your results are even better!
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