Magnets cannot create free energy or spin endlessly without an external source of mechanical power.

It is a tempting dream to build a self-spinning magnetic wheel. However, physics is unyielding. Generators must obey the first law of thermodynamics, meaning energy cannot be created from nothing. The magnetic forces of attraction and repulsion cancel each other out over a full rotation, and friction eventually stops the motion. Magnets merely convert existing mechanical work into electricity.