MAGNETICALLY LEVITATING TYPE DISC-SHAPED COMMUTATOR MOTOR

摘要

PURPOSE:To increase the lifetime of a commutator motor and to smoothly rotate the motor by providing a magnetically levitating magnet at the position planely opposed to a pole for forming a pole to be magnetized, thereby eliminating a load in a bearing. CONSTITUTION:An armature and a commutator 8 are fixedly secured coaxially to a rotational shaft 5 to form a rotor. 4-pole circular field magnet 9 is fixedly secured to the inner surface of a body 2 which is planely opposed to an armature. N- or S-pole magnetically levitating pole 13 is formed on the surface of a field magnet 9 side of a plastic magnet 12 of an armature. N- or S-pole magnetically levitating magnet 16 is disposed on the stationary surface of the magnet 9 side opposed to the pole 13.