Variable Field Magnet Motor

[Timpo]

Anyone understand this?? I'm not an engineer so I'm a bit confused.
Looks like it's a new technology from Japan?

Apparently it's some kind of new technology, here's the reference:

https://doi.org/10.1002/tee.22891

Matsui, N. (2019). Design and control of variable field permanent magnet motors. IEEJ Transactions on Electrical and Electronic Engineering, 14(7), 966-981. doi:10.1002/tee.22891

 

[Sierratim]

The innovation here seems to be the mechanically variable interface between the rotating magnet ring and the fixed magnetic coil stator ring. There may also be unseen electronics to provide variable phasing between the magnets and the stator coils resulting in variable speed control not normally associated with this type of motor.

These brushless motors are highly reliable but do rely on rare earth magnets imbedded in the rotor. Tesla avoids this by using a 2nd set of coils that replace the need for permanent magnets.

In high school my youngest sons built a generator based on a simplified version of this motor from the handful of magnets the instructor provided each team. They took 1st place by knocking the instructor down from the discharge of the capacitor he insisted on using to get an average reading of the various projects' outputs. Very funny, when he finally got up...