Here you see the 3 phases of the brushless DC (BLDC) motor
Red at 0 degrees, blue at 120 degrees, green at 240 degrees
These are represented in the animation by the 6 coloured "doughnuts"
They are "solenoids" or coils of wire
There are 6 since there are 2 for each phase on opposite sides of the rotor
so you have a complete magnetic field passing through the center of the motor
in 3 directions at 120 degrees to each other.
We have the rotor which has a fixed magnet (show above spinning as shaded grey) and would be attached to the output shaft.
The three phases red, blue and green are each producing an alternating field
and the three together produce a rotating field
which pulls the rotor magnet round and thus the shaft.
This is about making a brushless motor more efficient by making it possible to tune a controller to the motor's specific internal characteristics.
Current brushless motors are quite efficient already.
In the region of 80% and up.
I would estimate the resonant controller would increase this to the 90% region.
This would increase the range and top speed of the car.
