I am not sure how you are connected. If that 5v is from the coils of one phase then when you star connect it it will give 5 x 1.7v. Then when you rectify it will give that x 1.4v

This will give you 11.9v so with the rectifier drop your cut in is a bit over 200rpm. A bit on the high side but it will work.

If you only have 5v ac with the star connection then you are really low.

The magnet pull is meaningless, just forget it or tell us the neo grade. The air gap is not .07" it will be the distance between magnets ( 2 x .07 plus stator thickness). If your stator has got much too thick due to bad winding or potting this will reduce volts.

The meter will be near enough at 200 rpm. The discussion about waveform and inverters is valid for what they are discussing but your waveform will not be far removed from a sine wave unless you have done something wrong.

Have you brought out 6 leads or have you done the star connection inside, I just don't know what you are measuring for sure.