Electromagnetic coil, method of manufacturing electromagnetic coil, and electromagnetic actuator
AssigneeCkd Corporation
InventorsMasayuki Kouketsu, Akihiro Ito, Kazutoshi Itoh, Takashi Hosono, Sadayoshi Muto
Life of this patent
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Abstract
An electromagnetic coil includes a conductor winding 12a formed by winding a conductor 12b a plurality of times about a predetermined axis, and a ceramic layer 12c formed through thermal spraying on an axial end surface of the conductor winding 12a, and having a flattened surface. A maximal value t12 of thickness of the ceramic layer 12c is set to three times or less a maximal value t11 of depth of the recesses formed at the surface of turns of the conductor 12b at the axial end surface.
Claims13
An electromagnetic coil comprising:
- a conductor winding formed by winding a conductor and an adhesive layer a plurality of times about a predetermined axis such that adjacent turns of the conductor are bonded together by the adhesive layer provided therebetween, the conductor winding having an axial end surface with respect to a direction of the predetermined axis, the axial end surface having irregularities;
- and
- a ceramic layer formed through thermal spraying on the axial end surface, the ceramic layer having a flattened surface,
- wherein the irregularities of the axial end surface, including portions of the adhesive layer, are embedded in the ceramic layer, and the flattened surface of the ceramic layer is formed on an opposite side of the irregularities.
An electromagnetic actuator characterized by comprising:
- an electromagnetic coil including:
- a conductor winding formed by winding a conductor and an adhesive layer a plurality of times about a predetermined axis such that adjacent turns of the conductor are bonded together by the adhesive layer provided therebetween, the conductor winding having an axial end surface with respect to a direction of the predetermined axis, the axial end surface having irregularities;
- and
- a ceramic layer formed through thermal spraying on the axial end surface of the conductor winding so as to embed irregularities of the axial end surface, including portions of the adhesive layer, in the ceramic layer, the ceramic layer having a flattened surface on a side opposite of the irregularities;
- and
- a cooling member disposed in such a manner as to face the flattened surface of the ceramic layer.
Dependencies are inferred from the claim text.