Stator of rotary electric machine
View Patent ↗In a concentrated winding stator, which has a separated iron core structure, of a rotary electric machine, a length of ear portions 3 c of insulating sheets 3 , which are protruded between neighboring winding 4 , is set as a length by which a creepage distance, which is required for an insulation between the neighboring windings 4 , can be secured.
1. A stator of a rotary electric machine, the stator is configured by connecting a plurality of separated cores in an annular shape, each separated core formed of a plurality of laminated iron cores and having windings wound around teeth portions of the laminated iron cores via insulating sheets; wherein
the insulating sheets are composed of mounted portions, which are mounted at the teeth portions of the laminated iron cores, and extended portions that extend from both sides of the mounted portions and have a portion that is covered between the windings of the neighboring laminated iron cores, the extended portions have a length in the axial direction that is longer than an axial length of the mounting portions and that is limited to a creepage distance length that is required in order to secure an insulation between the neighboring windings.
2. A stator of the rotary electric machine as recited in claim 1 , wherein a length of at least a partial portion of the extended portions in an axial direction of the insulating sheets is longer than a length of a portion including the windings that protrude from both end portions in an axial direction of the laminated iron cores; and ear portions of the extended portion are longer than the mounted portions in the axial direction of the insulating sheets, and are arranged so as to cover the windings that protrude from both end portions in the axial direction of the laminated iron cores.
3. A stator of the rotary electric machine as recited in claim 2 , wherein the ear portions are formed at only one side in the axial direction of the extended portions of the insulating sheets, and the ear portions are alternately arranged at side surfaces of the teeth portions of the laminated iron cores.
4. A stator of the rotary electric machine as recited in claim 2 , wherein the ear portions, are formed at both sides in the axial direction and in each of opposite directions of the extended portions of the insulating sheets, and the ear portions are alternately arranged at side surfaces of the teeth portions of the laminated iron cores.
5. A stator of the rotary electric machine as recited in claim 2 , wherein the ear portions are formed at both sides in the axial direction of one of the extended portions of the insulating sheets, and the ear portions are alternately arranged at side surfaces of the teeth portions of the laminated iron cores.
6. A stator of the rotary electric machine as recited in claim 2 , wherein the insulating sheets having the ear portions formed at both sides in the axial direction of both extended portions of the insulating sheets, and the insulating sheets not having the ear portions, are alternately arranged at side surfaces of the teeth portions of the laminated iron cores.