| 摘要 |
<p>This invention relates to a motor with multiple yokes that are arranged concentrically, particularly to a motor that includes main magnets and auxiliary magnets in yokes wherein the auxiliary magnets prevent the loss of magnetic force as well as increase magnetic force in the magnetic lines of force formed by the main magnets. The disclosed motor with multiple yokes includes a rotor and a stator. The rotor contains plural cylindrical yokes, plural main magnets and plural auxiliary magnets. The cylindrical yokes are arranged in multi-stages in a radial direction. The plural main magnets are fixed to the yoke in each stage so that the polarities of the main magnets may be alternated in a circumference direction. The plural auxiliary magnets are fixed to the yoke in each stage in order that the polarities of the auxiliary magnets may be alternated with the polarities of the main magnets in the magnetic lines of force formed between the alternated main magnets. The stator includes an armature core and plural armature coils. At least one armature core is arranged to face the yoke in each stage. The armature core is wound with the plural armature coils so that the armature coils face the main magnet in the yoke in each stage in a circumference direction.</p> |
