What you missed to say is that this type of motor has zero coasting resistance, even less than a geared hub motor.
If you run out of energy, you can use it like a regular bike minus the extra weight.
And at the same time you have regeneration AKA E-ABS! That's amusingly wonderful, if you think of it.
Another thing to say is that due to missing magnets you may overheat it more than a synchronous motor.
The only limit is the isolation of the wires, this is usually like 200 degrees Celsius.
vs around 100 degrees for magnets, after which they become useless pieces of metal.
So, overall, theoretically you may get better power density with an induction motor.
The motor above has been designed to theoretically handle 20 kW.
Yes, it's not a bike hub motor, the bike is used just for primary tests.
In the current tests the power is limited to about 2.5 kW.
See yourself what bike he uses, even 80 km/h is a serious risk.
And it's not the first motor, it's already the second prototype.
The first was a Magic Pie 2 with heavily reworked both stator and rotor:
Unfortunately, the Curtis controller couldn't handle it at low speeds (drops to default 50Hz while it should start from 0).
So serios traction begins at ~20 km/h.
The second prototype was made from scratch and with a different number of poles to better fit with Curtis.
Not to say it works ideal, but better than the first prototype.
Video with the development group leader (the man with glasses):
Rushing through the streets (camera seems a bit dead):
Now they're working on their own controller, at the same time they're working with Curtis to get better support in their controllers.
That's a really revolutionary thing, and it'll be quite hard to break the initial market inertia.
And, well, there's no difference if you call it a "inverter" or a "bike controller".
It's basically the same schematics, just different firmware.