GENERATOR HAVING CLOSED MAGNETIC CIRCUIT

摘要

PURPOSE: A generator having a closed magnetic circuit is provided to increase magnetic flux interlinkage of a fixed permanent magnetic and a movable coil and substitute a dry cell or a battery. CONSTITUTION: A generator having a closed magnetic circuit comprises a fixed part(210) and a movable part(220). The fixed part(210) includes a first and a second permanent magnets(211,212), and a yoke(213) for fixing the first and the second permanent magnets(211,212). The movable part(220) is arranged to move straight between the first and the second magnets(211,212). The movable part(220) includes a core(221), a coil(222) wound around the core(221), and a support spring(223) for supplying elastic force to the core(221). The yoke(213) is formed as a ring or a cylinder to form the closed magnetic circuit of magnetic flux from N pole of the second permanent magnet(212) to S pole of the first permanent magnet(211) through the body of the yoke(213).