¡Qué sería del mundo sin los soñadores! = What would be of the world without the dreamers!
Imagination is more important than knowledge.
Albert Einstein
Yeah, Einstien was wrong about a lot of important things, like quantum mechanics. Because of his 'beliefs', almost all of his later work in physics is useless.
A rotor can be 'electrified' depending upon the type of generator. A PM generator can have a rotor with permament magnets, so no electric current is sent through the rotor. Even so, the rotor a PM machine will have eddy current and hysteresis losses that affect its efficiency.
The best efficiency number I've seen claimed is 98% for the SEMA motor. This 98% does not include bearing losses, controller losses, etc. I have to add that I have some experience with Lynx Motion and their SEMA motor. In fact, I took two of the pictures on that page, just above the caption that says "SEMA motor in testing". After a great deal of research into many high-efficiency motor companies, I wrote the motor spec, statement of work, test plan, etc. for that project. I also ran the tests, which included operation from a high-power, high-voltage battery system. The SEMA had the highest theoretical efficiency I could find but it certainly is not 100% electrically efficient.
