A motor based on permanentmagnets in both stator and rotor will never work. Whishful hobbyists has tried to “break the code” for decades, but has never achieved a working motor. Lots of claims out there that it is possible. Even projects that has been founded with high amount of money.
The problem lays in the nature of permanent magnets. They are PERMANENT-magnets. Even though they are getting weaker over time, the magnets are basically permanently magnetized. This means the magnetism does not change in a rate that can provide useful energy like electromagnets can. Electromagnets are controlled by electric current that flows in both directions. The current flow, and the magnetic polarization, is controlled so the rotor or stator can attract and then repel at the right moment to achieve rotation.
Sure it is possible to change polarization on a permanentmagnet by turning it 18o°, but this operation is the very reason why the rotor turns around, and therfor it requires torque and energy to turn the magnets 180°. In fact the same amount of energy it takes to make the rotor spin. Torque minus countertorque equals zero torque. The only way around this problem is controlling electromagnets - by supplying electric energy.
The known laws of thermodynamics does not allow the permanent magnet motor to work because there is no energy input due to the nature of permanentmagnets. This is the easy explanation.
The vast majority of smaller electro motors, and many on electric cars, bikes etc, do have permanentmagnets in them, but also electromagnets that controlls rotation.
There are permanentmagnet motor projects out there trying to defeat the laws of physics. Mostly based on simulations and theories. What most of these people forget is that the rotor or the stator needs to swap polarity at least two times in one cycle. And they also forget that the torque achieved is due to this swap of polarity.
In cheap simulators it is not possible to destinguish where the simulated torque comes from. Vectorized calculations are mistaken on regular basis, but the simulations appears to be promising, so the inventor starts to build it. Very often the idea is posted on the internet before the actual build takes place.
So initially there are no physical tests provided to back up the idea. So the inventor, after claiming his “proof”, build the motor, but then reality hits him hard. The stakes are too high, so he decide to cheat. Therfor you appearently see “working” permanentmagnet motors on Youtube.
