ccmdr
100 W
Brum - My best guess is something to do with the halls and phase sequencing, as in you can replicate the wheel rotaating to crazy 120kph+ speeds by having the hall angle set 'incorrectly' and going WOT. It seems at best guess to feel like a strong pull to 90kph then it's like it completely skips a phase and goes, kind of jumps ( in a millisecond way) and appears to have a boost. Think 'big' motor going from delta to wye. I'd again guess that it miss fires the phase sequence badly enough to causing the motor to stop in that nasty abrupt snap. Two of the phases starting to link over. I'd imagine if this were done under sufficent load it could overcurrent and blow the controller.
It's all speculation mind you
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It's all speculation mind you