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US 4,719,377 AGranted
Armature annular core
AssigneeKabushiki Kaisha Toshiba
InventorsHiromichi Horie, Kumi Ochiai, Itsuo Arima, Mikio Morita
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Abstract
An annular core used in a so-called air axial gap motor includes a magnetic and structural gap along the axial direction. By using a compressed molded body of a mixture of a magnetic metal powder and an electrically insulating resin as major constituents, an annular molded body and a molded plate are prepared. The annular molded body has slots and teeth alternately formed along the circumferential direction. The molded plate closes the upper portions of the slots to constitute a fully closed slot structure.
Claims15
An armature annular core comprising:
- an annular molded body comprising:
- a compressed molded body of a mixture of a magnetic metal powder and an electrically insulating resin as major constituents, said annular molded body being provided with slots and teeth alternately formed on an upper surface of said compressed molded body along a circumferential direction thereof;
- a winding mounted in said slots;
- and
- a molded plate comprising a compressed molded body of a mixture of a magnetic metal powder and an electrically insulating resin as major constituents, said molded plate being adapted to close upper portions of said slots of said annular molded body to constitute a fully closed slot structure wherein said resin comprises:
- an inorganic compound powder selected from the electrically insulated powder materials contained in the group of Al.sub.2 O.sub.3, SiO.sub.2, CaCO.sub.3, CaSiO.sub.3, glass powder, mica powder and mixtures of the compounds in this group.
3 more elements
An armature annular core comprising:
- a compressed molded body of a mixture of a magnetic metal powder and an electrically insulating resin as major constituents, said annular molded body being provided with slots and teeth alternatively formed on an upper surface of said compressed molded body along a circumferential direction thereof;
- a winding mounted in said slots;
- and
- a molded plate comprising a compressed molded body of a mixture of a magnetic metal powder and an electrically insulating resin as major constituents, said molded plate being adapted to close upper portions of said slots of said annular molded body to constitute a fully closed slot structure wherein said resin forming said molded body and said molded plate comprises:
- an electrically insulated inorganic compound powder.
2 more elements
Dependencies are inferred from the claim text.