Motor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKengo OHIRA
Life of this patent
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Abstract
The motor includes a stator core having a plurality of slots, a stator coil disposed in the slots and configured by connecting a plurality of segment coils, and an insulating material configured by a foaming material having insulation property and covering each connection portion of the segment coils. Each connection portion of the segment coils has a structure in which each end portion in which the conductor portions of two segment coils are exposed is inserted from both ends into a fitting member having a cylindrical shape, at least one through-hole is formed in a side wall of the fitting member having a cylindrical shape, and the insulating material extends from the inside of the fitting member to the outside through at least one through-hole.
Claims5
A motor comprising:
- a stator core including a plurality of slots;
- a stator coil disposed in the slots and configured by connecting a plurality of segment coils;
- and
- an insulating material made of a foaming material having insulation property, the insulating material covering each connection portion of the segment coils, wherein:
- each connection portion of the segment coils has a structure in which each end portion of two segment coils where a conductor portion is exposed is fitted into both ends of a fitting member from each end of the fitting member having a cylindrical shape;
- at least one through-hole is provided in a side wall of the fitting member having the cylindrical shape;
- and
- the insulating material extends from an inside of the fitting member to an outside of the fitting member through the at least one through-hole.
A method of manufacturing a motor comprising:
- disposing a raw material of a foaming material having insulation property in an inside of a fitting member having a cylindrical shape;
- connecting, after the disposing, end portions of two segment coils, where conductor portion is exposed, via the fitting member in slots of a stator core;
- and
- foaming, after the connecting, the raw material of the foaming material positioned in the inside of the fitting member by heating the raw material, wherein:
- at least one through-hole is provided in a side wall of the fitting member having the cylindrical shape;
- and
- in the foaming, the foaming material is expanded from the inside of the fitting member to an outside of the fitting member through the at least one through-hole to form an insulating material that covers a connection portion of the two segment coils.
Dependencies are inferred from the claim text.