Abstract: An improved compact generator, a light-emitting wheel adopting the same and a manufacturing method are provided. To make a generator compact and light to smoothly perform electromagnetic induction by crossing the directions of magnetic flux of an armature coil and a permanent magnet, an assembly structure including an armature arm and the armature coil is improved. To prevent damage by impact to the permanent magnet and use a rare-earth based permanent magnet in a ring type having the thickness of 1.2 mm in Lanthanides which has a magnetic force 9-10 times stronger than that of a ferrite based permanent magnet but is weak against impacts, a permanent magnet assembly is provided in which the permanent magnet is arranged on a buffer.