US 6,958,559 B2Granted

Magneto generator

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsMitsuharu Hashiba, Nobuhiro Kihara

Life of this patent

Estimating the term…

Loading patent…

Abstract

A rise in temperature of magneto coils can be suppressed, thereby improving the electrical efficiency, service life and reliability thereof. A flywheel (3) has a cylindrical portion (4), and is rotatable about an axis of rotation A—A. A plurality of magnets (7) are mounted on an inner peripheral surface of the flywheel (3) so as to rotate therewith. A stator core (10) has a plurality of teeth (12) protruded outwardly in a diametral direction, and is disposed in opposition to the magnets (7). Conductive wires are wound around the teeth (12), respectively, to form magneto coils (11). The stator core (10) has a laminated core (15) formed of a plurality of magnetic sheet steel plates laminated one over another, and a pair of end plates (16, 17) disposed so as to sandwich opposite side surfaces of the laminated core (15). At least one of the pair of end plates (16, 17) is made of aluminum whose heat radiation is higher than the magnetic sheet steel plates.

Claims5

Dependent claims

A magneto generator comprising:

a flywheel having a cylindrical portion and being rotatable about an axis of rotation;
a plurality of magnets mounted on an inner peripheral surface of said flywheel so as to rotate therewith;
a stator core having a plurality of teeth protruded outwardly in a diametral direction and being disposed in opposition to said magnets;
and
magneto coils with conductive wires wound around said teeth;
wherein said stator core has a laminated core formed of a plurality of magnetic sheet steel plates laminated one over another, and a pair of end plates disposed so as to sandwich opposite side surfaces of said laminated core, and
at least one of said pair of end plates is made of a metallic material whose heat radiation is higher than that of said magnetic sheet steel plates, wherein:
said metallic material has a tensile strength higher than that of said steel sheet plates;
and
at least one of said end plates among said teeth of said stator core has a circumferential width in a rotational direction around said axis of rotation smaller than a circumferential width of said laminated core.

7 more elements

Dependencies are inferred from the claim text.