Patent ID: 6563248
Filing Date: 2003-05-13
Classification: H02K

Abstract:
A hybrid-magnet DC motor, comprising:a cylindrical yoke; a stator including a plurality of electromagnets placed in the yoke and magnetizable in opposite magnetic polarities alternately in a circumferential direction, and a plurality of permanent magnets sandwiched between stator cores of the electromagnets and magnetized in same magnetic polarities as those of the stator cores adjacent thereto; and a rotor including an armature having a plurality of teeth around an armature core mounted on a rotor shaft, wherein fluxes of the permanent magnets form a closed magnetic circuit within the stator when the electromagnets and the armature are deenergized, and wherein fluxes of the permanent magnets and the electromagnets flow through the armature core in a same direction via the teeth when the electromagnets and the armature are energized.