Focused Energy has designed a halbach array coiled motor. It potentially be could one of the lightest, more powerful electric motors. But taking it one step further, can we actually build a magnet free motor?

Sources & Credits:
   • Focused Magnetics (Pure Halbach Array...  
   • 3d-printed Halbach Motor - Building I...  
   • What is a SYNCHRONOUS MOTOR and how d...  
   • Why is electric motor efficiency so i...  
   • 【TOSHIBA】Superconducting Motor Techno...  
   • Magnet Free Motor By Mahle | Magnet F...  
   • EVSys800  - a remarkably compact, mod...