How to Build a Magnetic Generator | Tesla Generator Nov 19, 2014Before learning how to build a magnetic generator, it is essential to understand how this generator works and what its components are. Always in search of new alternative energy projects, the world understood that every idea with an eco-friendly potential is worth analyzing. OPERATION OF A GENERATOR - Portable Generator: The This conceptual schematic shows an example of wiring of a self-excited portable generator. AC voltage from an auxiliary winding of the armature is rectified by solid-state diodes and applied to field coil. The current in this winding generates magnetic flux. An engine spins this assembly, which produces revolving magnetic field inside stator.