JPWO2016208555A1 - Electric motor stator - Google Patents

Electric motor stator Download PDF

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JPWO2016208555A1
JPWO2016208555A1 JP2017524905A JP2017524905A JPWO2016208555A1 JP WO2016208555 A1 JPWO2016208555 A1 JP WO2016208555A1 JP 2017524905 A JP2017524905 A JP 2017524905A JP 2017524905 A JP2017524905 A JP 2017524905A JP WO2016208555 A1 JPWO2016208555 A1 JP WO2016208555A1
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insulating
insulating sheet
stator
sheets
sheet
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JP6407427B2 (en
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秀行 前田
秀行 前田
隆之 鬼橋
隆之 鬼橋
崇裕 田中
崇裕 田中
政洋 湯谷
政洋 湯谷
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/32Windings characterised by the shape, form or construction of the insulation
    • H02K3/34Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

鉄心(2)の両側において設置された凹状のスロット部(2a)の形状に合わせて折り曲げられた複数の絶縁シート(1)を備え、ティースに巻回されたコイルと鉄心(2)との間に複数の絶縁シート(1)を介在させることにより鉄心(2)とコイルとを絶縁させ、更に複数の鉄心2が積層された積層鉄心を環状に接合することにより固定子(8)を構成することにより、絶縁部材がスロット内に占める領域を減らして巻線領域を大きくし、巻線ターン数を増加させ、更には絶縁シート(1)を折り曲げるのに必要な力を小さくする。Provided with a plurality of insulating sheets (1) bent in accordance with the shape of the concave slot (2a) installed on both sides of the iron core (2), between the coil wound around the teeth and the iron core (2) The stator (8) is configured by insulating the iron core (2) and the coil by interposing a plurality of insulating sheets (1) on the core, and further joining the laminated iron core in which the plurality of iron cores 2 are laminated in an annular shape. As a result, the area occupied by the insulating member in the slot is reduced to increase the winding area, the number of winding turns is increased, and the force required to bend the insulating sheet (1) is reduced.

Description

この発明は、電動機の固定子に関するものであり、特にティース部に集中巻線を施した固定子の絶縁構造に関するものである。   The present invention relates to a stator of an electric motor, and more particularly to an insulating structure of a stator having concentrated windings on a tooth portion.

近年では電動機の小型化及び高出力を実現するために、固定子を分割してティース部に集中巻線することで巻線のスロット占積率を向上させ、それらを嵌合させて固定子を製作する方法が用いられている。積層鉄心と巻線体の間を絶縁する必要があり、絶縁樹脂部材をスロットに挿入することで絶縁処理をしている。一般に絶縁樹脂部材は金型を用いた樹脂成型で製作する。積層鉄心の積層高さが大きくなるとスロット内を覆う部分の絶縁樹脂部材が長くなる。この場合絶縁樹脂部材の成型ができなくなったり、コストが高くなったりする問題があった。   In recent years, in order to achieve miniaturization and high output of electric motors, the stator is divided and concentrated windings on the teeth part to improve the slot space factor of the windings, and the stators are fitted by fitting them. The manufacturing method is used. It is necessary to insulate between the laminated iron core and the winding body, and the insulation treatment is performed by inserting an insulating resin member into the slot. In general, the insulating resin member is manufactured by resin molding using a mold. When the laminated height of the laminated iron core increases, the insulating resin member in the portion covering the inside of the slot becomes longer. In this case, there is a problem that the insulating resin member cannot be molded or the cost is increased.

特許文献1の固定子においては、絶縁シートは、積層鉄心のスロット部のコイル巻装部内側を絶縁する部位、巻線体の側部を覆う部位、さらにこの部位に積層鉄心の積層厚より突出させたタブを一体で備えているものが開示されている。そして巻装した巻線体を上記側部を覆う部位を折り曲げて覆い、その後に左右および上下両端部に設けた上記タブを折り曲げてコイルエンド部(積層方向の端部にあるコイル)を絶縁するようにしている(例えば特許文献1)。   In the stator of Patent Document 1, the insulating sheet protrudes from the laminated thickness of the laminated core in a part that insulates the coil winding part inside of the slot part of the laminated core, a part that covers the side of the winding body, and the part. What is provided with the tab made to be integrated is disclosed. Then, the wound winding body is covered by bending the portion covering the side portion, and then the tabs provided on the left and right and upper and lower ends are bent to insulate the coil end portion (the coil at the end portion in the stacking direction). (For example, Patent Document 1).

特開2003−61286号公報JP 2003-61286 A

従来の固定子の絶縁構造においては、絶縁シートの折り曲げ部には絶縁シートの厚さに応じて曲げ半径部ができ、この部位には巻線できないため、巻線領域が減少しスロット占積率が低下するという問題点があった。又絶縁端板には絶縁シートを押さえて積層鉄心のスロット部に沿わせるための突起があるが、絶縁シートが厚いほど反発力が強いため、突起の厚みを増やして強度を強くする必要がある。この場合でも巻線領域が減少し、スロット占積率が低下するという問題があった。更に絶縁シートが厚くなるほど絶縁シートを折り曲げるのに必要な力を大きくする必要があり、作業性が悪くなるという問題があった。又絶縁シートの厚さは要求される絶縁性能ごとに変更する必要があるため、絶縁シートの種類が増えるという問題もあった。   In the conventional insulation structure of the stator, the bent portion of the insulating sheet has a bend radius portion according to the thickness of the insulating sheet, and since this portion cannot be wound, the winding area is reduced and the slot space factor is reduced. There has been a problem of lowering. In addition, the insulation end plate has a protrusion to hold the insulation sheet and follow the slot part of the laminated iron core. However, the thicker the insulation sheet, the stronger the repulsive force. Therefore, it is necessary to increase the thickness of the protrusion to increase the strength. . Even in this case, there is a problem that the winding area is reduced and the slot space factor is lowered. Furthermore, as the insulating sheet becomes thicker, it is necessary to increase the force required to bend the insulating sheet, and there is a problem that workability deteriorates. Further, since the thickness of the insulating sheet needs to be changed for each required insulating performance, there is a problem that the number of types of insulating sheets increases.

この発明は上記のような問題点を解決するためになされたものであり、絶縁部材がスロット内に占める領域を減らして巻線領域を大きくすることにより巻線ターン数を増加させ、更には絶縁シートを折り曲げるのに必要な力を小さくすることのできる固定子の絶縁構造を得ることを目的としている。   The present invention has been made to solve the above-described problems, and by increasing the winding area by reducing the area occupied by the insulating member in the slot, the number of winding turns is increased, and further, the insulation is achieved. An object of the present invention is to obtain a stator insulation structure that can reduce the force required to bend a sheet.

この発明に係る電動機の固定子は、ティース毎に分割された複数の鉄心を積層して得られる積層鉄心が環状に配置されたものであって、鉄心の両側において設置された凹状のスロット部の形状に合わせて折り曲げられた複数の絶縁シートを備え、ティースに巻回されたコイルと鉄心との間に複数の絶縁シートを介在させることにより鉄心とコイルとを絶縁させたものである。   The stator of the electric motor according to the present invention is a structure in which a laminated core obtained by laminating a plurality of iron cores divided for each tooth is arranged in an annular shape, and has concave slot portions installed on both sides of the iron core. A plurality of insulating sheets bent in accordance with the shape are provided, and the iron core and the coil are insulated by interposing a plurality of insulating sheets between the coil wound around the tooth and the iron core.

上記のような電動機の固定子によれば、1枚当りの絶縁シートの厚さが薄くなり、最内層の絶縁シートの折り曲げ部の曲げ半径が小さくなるため、絶縁シート全体の曲げ半径も小さくなり、巻線領域が増加し、スロット占積率が増加する。また絶縁シートの反発力が小さくなり、絶縁端板における絶縁シートを押えるための突起を薄く形成できるため、巻線領域が増加し、スロット占積率が増加する。更には絶縁シートの折り曲げに必要な力が減少し、作業性が向上する。又絶縁シートを複数枚重ねることで絶縁性能の高い絶縁シートと同じ絶縁性能を実現でき、絶縁シートの種類を削減できる。   According to the stator of the electric motor as described above, the thickness of the insulating sheet per sheet is reduced, and the bending radius of the bent portion of the innermost insulating sheet is reduced, so that the bending radius of the entire insulating sheet is also reduced. The winding area increases and the slot space factor increases. In addition, the repulsive force of the insulating sheet is reduced, and the protrusion for pressing the insulating sheet on the insulating end plate can be formed thin, so that the winding area increases and the slot space factor increases. Furthermore, the force required for bending the insulating sheet is reduced, and workability is improved. In addition, by stacking a plurality of insulating sheets, the same insulating performance as that of the insulating sheet having high insulating performance can be realized, and the types of insulating sheets can be reduced.

実施の形態1による積層鉄心を示す斜視図である1 is a perspective view showing a laminated iron core according to Embodiment 1. FIG. 実施の形態1による積層鉄心を示す分解斜視図である。1 is an exploded perspective view showing a laminated iron core according to Embodiment 1. FIG. 実施の形態1による絶縁シートを示す平面断面図である。FIG. 3 is a plan sectional view showing the insulating sheet according to the first embodiment. 実施の形態1による固定子を示す斜視図である。FIG. 3 is a perspective view showing a stator according to the first embodiment. 実施の形態1による両端を溶着した絶縁シートを示す側面断面図であって、折り曲げ前の状態を示す側面断面図及び折り曲げ後の状態を示す側面断面図である。It is side surface sectional drawing which shows the insulating sheet which welded both ends by Embodiment 1, Comprising: It is side surface sectional drawing which shows the state before bending, and side surface sectional drawing which shows the state after bending. 実施の形態1による中央部を溶着した絶縁シートを示す側面断面図であって、折り曲げ前の状態を示す側面断面図及び折り曲げ後の状態を示す側面断面図である。It is side surface sectional drawing which shows the insulating sheet which welded the center part by Embodiment 1, Comprising: It is the side surface sectional view which shows the state before bending, and the side surface sectional view which shows the state after bending. 一般的な固定子のティース部を示す平面断面図及びX部拡大図である。It is the plane sectional view and X section enlarged view showing the teeth part of a general stator. 実施の形態1による固定子のティース部を示す平面断面図及びY部拡大図である。FIG. 3 is a plan sectional view and an enlarged view of a Y portion showing a tooth portion of the stator according to the first embodiment. 実施の形態2による折り曲げ後の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet after the bending by Embodiment 2. FIG. 実施の形態2による折り曲げ前の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet before the bending by Embodiment 2. FIG. 実施の形態2による折り曲げ前の絶縁シートを示す正面図である。It is a front view which shows the insulating sheet before the bending by Embodiment 2. FIG. 実施の形態3による絶縁工程後の積層鉄心を示す平面図である。FIG. 10 is a plan view showing a laminated iron core after an insulation process according to a third embodiment. 実施の形態3による絶縁工程後の積層鉄心を示す斜視図である。FIG. 10 is a perspective view showing a laminated iron core after an insulation process according to a third embodiment. 実施の形態3による絶縁シートを折り曲げた状態を示す平面断面図である。It is a plane sectional view showing the state where the insulating sheet by Embodiment 3 was bent. 実施の形態4による折り曲げ後の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet after the bending by Embodiment 4. 実施の形態4による折り曲げ前の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet before bending by Embodiment 4. 実施の形態4による折り曲げ後の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet after the bending by Embodiment 4. 実施の形態4による折り曲げ前の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet before bending by Embodiment 4. 実施の形態5による絶縁工程後の固定子のティース部を示す平面断面図である。FIG. 10 is a plan sectional view showing a teeth portion of a stator after an insulation process according to a fifth embodiment. 一般的な固定子のティース部を示す平面断面図である。It is plane sectional drawing which shows the teeth part of a common stator. 実施の形態6による折り曲げ後の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet after the bending by Embodiment 6. 実施の形態6による折り曲げ前の絶縁シートを示す正面図及び側面図である。It is the front view and side view which show the insulating sheet before bending by Embodiment 6. 実施の形態6による絶縁シートを折り曲げた状態を示す平面断面図である。It is a plane sectional view showing the state where the insulating sheet by Embodiment 6 was bent. 実施の形態6による絶縁シートを折り曲げた状態を示す平面断面図である。It is a plane sectional view showing the state where the insulating sheet by Embodiment 6 was bent. 実施の形態7による絶縁工程後の固定子のティース部を示す平面断面図である。FIG. 10 is a plan sectional view showing a teeth portion of a stator after an insulation process according to a seventh embodiment.

実施の形態1.
以下、実施の形態1について図を参照しながら説明する。図1は実施の形態1による絶縁工程後の積層鉄心を示す斜視図、図2は同じく分解斜視図である。積層鉄心はPET(ポリエチレンテレフタレート)等の樹脂で形成された絶縁シート1、ティース毎に分割された鉄心2、絶縁端板3より構成されている。鉄心2は両側において凹状のスロット部2aを備え、スロット部2aは鉄心2の外径部と内径部との間に形成されている。絶縁シート1は内側絶縁シート1aと外側絶縁シート1bの2枚のシートを重ねた構造であり、母材から切り抜いて重ねた後、スロット部2aの形状に合わせて手で折り曲げたり、金型で加圧したりして成型する。
Embodiment 1 FIG.
The first embodiment will be described below with reference to the drawings. 1 is a perspective view showing a laminated iron core after an insulation process according to Embodiment 1, and FIG. 2 is an exploded perspective view of the same. The laminated iron core includes an insulating sheet 1 made of a resin such as PET (polyethylene terephthalate), an iron core 2 divided for each tooth, and an insulating end plate 3. The iron core 2 includes concave slot portions 2a on both sides, and the slot portion 2a is formed between an outer diameter portion and an inner diameter portion of the iron core 2. The insulating sheet 1 has a structure in which two sheets of an inner insulating sheet 1a and an outer insulating sheet 1b are stacked. After being cut out from the base material and stacked, the sheet is folded by hand according to the shape of the slot portion 2a, Press to mold.

図3は絶縁シート1を示す平面断面図である。折り曲げた絶縁シート1は、図3に示すようにスロット内径側絶縁部4、スロット外径側絶縁部5、スロット周方向絶縁部6、折り曲げ部7を有する。絶縁シート1を積層鉄心のスロット部2aに挿入した後、積層鉄心の積層方向の両端部に絶縁端板3を装着し、絶縁端板3の絶縁シート保持部3aで絶縁シート1を挟持することにより鉄心2と巻線を絶縁している。そしてティースにコイルを巻線後積層鉄心を環状に接合して、図4に示す固定子8が得られる。図4は完成された固定子8を示す斜視図である。   FIG. 3 is a plan sectional view showing the insulating sheet 1. The folded insulating sheet 1 has a slot inner diameter side insulating portion 4, a slot outer diameter side insulating portion 5, a slot circumferential direction insulating portion 6, and a bent portion 7, as shown in FIG. After the insulating sheet 1 is inserted into the slot portion 2a of the laminated core, the insulating end plates 3 are attached to both ends of the laminated core in the stacking direction, and the insulating sheet 1 is sandwiched between the insulating sheet holding portions 3a of the insulating end plate 3 By this, the iron core 2 and the winding are insulated. Then, after winding the coil on the teeth, the laminated iron core is joined in an annular shape to obtain the stator 8 shown in FIG. FIG. 4 is a perspective view showing the completed stator 8.

また絶縁シート1はこのままスロット部2aに挿入してもよいが、搬送時や仕掛時のずれを防ぐため、絶縁シート1の一部を溶着して固定しても良い。次に仕掛時について以下説明する。巻線作業をする前に、絶縁シート1をコアに組み付ける作業がある。そしてこの組み付けた状態(巻線していない状態)で仕掛品として保管することがある。このことを「仕掛時」と呼ぶ。
折り曲げ時には内側絶縁シート1aと外側絶縁シート1bの折り曲げ部7の曲げ半径の大きさが異なる。従って図5(A)、(B)に示すように絶縁シート1の両端を溶着して折り曲げると、内側絶縁シート1aが膨らんでしまう。従って溶着する箇所はいずれか1ヶ所だけにするか、あるいは複数にする場合には鉄心2の積層方向において複数箇所配置すると良い。例えば、図6(A)、(B)に示すように、スロット周方向絶縁部6に設けるとよい。もしくはスロット部2aの形状に合うように成型した後に溶着することで、膨らみを防止することができる。絶縁シート1の固定方法はかしめや接着剤、テープなどを用いても良い。図6(A)、(B)における溶着箇所については、絶縁シート1の折り曲げ部7より内側であれば溶着部が複数であってもよい。
The insulating sheet 1 may be inserted into the slot portion 2a as it is, but a part of the insulating sheet 1 may be welded and fixed in order to prevent a shift at the time of conveyance or in-process. Next, the in-process time will be described below. There is an operation of assembling the insulating sheet 1 to the core before the winding operation. And it may store as a work-in-process in this assembled state (state not wound). This is called “in-process”.
At the time of bending, the bending radii of the bent portions 7 of the inner insulating sheet 1a and the outer insulating sheet 1b are different. Therefore, as shown in FIGS. 5A and 5B, when both ends of the insulating sheet 1 are welded and bent, the inner insulating sheet 1a swells. Therefore, the number of locations to be welded is only one, or a plurality of locations may be arranged in the stacking direction of the iron core 2. For example, as shown in FIGS. 6A and 6B, it may be provided in the slot circumferential insulating portion 6. Alternatively, bulging can be prevented by welding after molding to match the shape of the slot portion 2a. As the fixing method of the insulating sheet 1, caulking, an adhesive, a tape, or the like may be used. About the welding location in FIG. 6 (A), (B), as long as it is inside the bending part 7 of the insulating sheet 1, a plurality of welding parts may be sufficient.

図7(A)は一般的な固定子のティース部を示す平面断面図、図7(B)は図7(A)におけるX部拡大図である。図7(A)、(B)において、絶縁シート1の折り曲げ時に、絶縁シート1に割れが生じないように、図7(B)に示すように、絶縁シート1の折り曲げ部7には曲げ半径を設ける必要がある。絶縁シート1が厚いほど割れが生じないように曲げ半径を大きくする必要がある。そのため折り曲げ部7には巻線できないため、絶縁シート1が厚いほど巻線領域9が減少する。   FIG. 7A is a plan sectional view showing a tooth portion of a general stator, and FIG. 7B is an enlarged view of an X portion in FIG. 7A. In FIGS. 7A and 7B, the bending portion 7 of the insulating sheet 1 has a bending radius so that the insulating sheet 1 is not cracked when the insulating sheet 1 is bent, as shown in FIG. It is necessary to provide. It is necessary to increase the bending radius so that the thicker the insulating sheet 1 is, the less cracking occurs. Therefore, since it cannot wind around the bending part 7, the winding area | region 9 reduces, so that the insulating sheet 1 is thick.

図8(A)は実施の形態1による固定子のティース部を示す平面断面図、図8(B)は図8(A)におけるY部拡大図である。図8(A)、(B)に示すように、絶縁シート1を2枚に分けることで1枚当たりの厚さを薄くし、内側絶縁シート1aの曲げ半径を小さくできるため、全体の曲げ半径を小さくし巻線領域9(巻線体自体の図示は省略されている)を大きくすることができる。また本実施形態においては、分割した積層鉄心構造を採用しており、スロット内にコイルをたくさん配置することができるため、更に高効率の電動機を実現できる。   8A is a plan sectional view showing a tooth portion of the stator according to the first embodiment, and FIG. 8B is an enlarged view of a Y portion in FIG. 8A. As shown in FIGS. 8A and 8B, by dividing the insulating sheet 1 into two sheets, the thickness per sheet can be reduced and the bending radius of the inner insulating sheet 1a can be reduced. And the winding region 9 (the winding body itself is not shown) can be enlarged. Further, in the present embodiment, a divided laminated core structure is adopted, and a large number of coils can be arranged in the slot, so that a more efficient electric motor can be realized.

絶縁端板3の絶縁シート保持部3aは絶縁シート1の反発力を受けても折れないように強度を持たせる必要がある。従って絶縁シート1が厚くなり反発力が大きくなると、絶縁シート保持部3aも厚くする必要があり、巻線領域9が減少してしまう。本実施形態では絶縁シート1を2枚に分けることで、反発力の総和は従来の1枚の絶縁シートの反発力よりも小さくすることができる。絶縁シート1の反発力を簡易的に長方形断面の梁の折り曲げ問題と仮定して以下計算する。   The insulating sheet holding part 3a of the insulating end plate 3 needs to have strength so that it does not break even if it receives the repulsive force of the insulating sheet 1. Therefore, when the insulating sheet 1 becomes thicker and the repulsive force increases, the insulating sheet holding portion 3a also needs to be thickened, and the winding region 9 is reduced. In this embodiment, by dividing the insulating sheet 1 into two sheets, the total repulsive force can be made smaller than the repulsive force of one conventional insulating sheet. The repulsive force of the insulating sheet 1 is calculated below assuming that it is a problem of bending a beam having a rectangular cross section.

絶縁シート1の厚さをhとすると、反発力Pは梁の基礎式から、
P=Eδbh/4L ∝ h
である。ここで、E:ヤング率、δ:たわみ量、h:厚さ、b:幅、L:長さである。従って反発力Pは絶縁シート1の厚さhの3乗に比例することがわかる。絶縁シート1をn枚に分けた場合、絶縁シートの1枚当たりの厚さはh/nとなるため、絶縁シート1枚当たりの反発力Pは、
=P/n
となる。従って絶縁シートn枚の反発力の総和Pは、
=P×n=P/n
となる。つまり絶縁シートを複数枚重ね合わせることで、1枚の絶縁シートを用いるよりも反発力を低下させることができる。従って絶縁端板3の絶縁シート保持部3aが受ける反発力が小さくなり、絶縁シート保持部3aを薄くすることができるため、巻線領域9を大きくすることができる。
When the thickness of the insulating sheet 1 is h, the repulsive force P is obtained from the basic equation of the beam,
P = Eδbh 3 / 4L 3 ∝ h 3
It is. Here, E: Young's modulus, δ: deflection amount, h: thickness, b: width, L: length. Therefore, it can be seen that the repulsive force P is proportional to the cube of the thickness h of the insulating sheet 1. When the insulating sheet 1 is divided into n sheets, since the thickness per insulating sheet is h / n, the repulsive force P 1 per insulating sheet is
P 1 = P / n 3
It becomes. Thus total P 2 of the insulating sheet n pieces of repulsion,
P 2 = P 1 × n = P / n 2
It becomes. In other words, by superposing a plurality of insulating sheets, the repulsive force can be reduced as compared to using a single insulating sheet. Accordingly, the repulsive force received by the insulating sheet holding portion 3a of the insulating end plate 3 is reduced and the insulating sheet holding portion 3a can be made thin, so that the winding region 9 can be enlarged.

又上記においては、絶縁シートが2枚重なった構造について説明したが、絶縁シートの枚数は何枚でも良く、分割枚数が多いほど上記効果は大きくなる。ただし枚数が増加すると搬送や折り曲げが大変になるため、通常は2枚か3枚を用いる。また絶縁シートの厚さは全て同じにする方が、絶縁シートの反発力の総和を小さくでき、更に絶縁シートの種類を削減できる効果があるため好ましいが、それぞれの絶縁シートの厚みが異なる場合でも反発力を低下させる効果を有するため、厚みが異なっても良い。   In the above description, the structure in which two insulating sheets are overlapped has been described. However, the number of insulating sheets may be any number, and the above effect becomes greater as the number of divided sheets increases. However, as the number of sheets increases, conveyance and folding become difficult, so usually two or three sheets are used. In addition, it is preferable that all the insulating sheets have the same thickness because the sum of the repulsive forces of the insulating sheets can be reduced and the effect of reducing the types of insulating sheets can be reduced, but even if the thickness of each insulating sheet is different. Since it has the effect of reducing the repulsive force, the thickness may be different.

本実施形態によればその他に以下の効果を有する。即ち、絶縁シートの折り曲げに必要な力が減少するため、折り曲げ時や積層鉄心を環状に接合するいわゆる円環作業時における作業性が向上する。又絶縁シートを複数枚重ねることで絶縁性能の高い絶縁シートと同じ絶縁性能を実現できるため、1種類の絶縁シートで絶縁性能の要求の低い固定子と絶縁性能の要求の高い固定子の両方に対応することができる。従って異なる厚さの絶縁シートを用意する必要がないため、絶縁シートの種類を削減できる。   According to this embodiment, the following other effects are obtained. That is, since the force required to bend the insulating sheet is reduced, workability at the time of bending or so-called annular work for joining the laminated cores in an annular shape is improved. In addition, since the same insulation performance as an insulation sheet with high insulation performance can be realized by stacking multiple insulation sheets, one type of insulation sheet can be used for both stators with low insulation performance requirements and stators with high insulation performance requirements. Can respond. Accordingly, since it is not necessary to prepare insulating sheets having different thicknesses, the types of insulating sheets can be reduced.

実施の形態2.
図9(A)は実施の形態2による絶縁シートを示す正面図、図9(B)は同じく側面図であり、図9(A)、(B)においては、絶縁シートを折り曲げた後の状態を示している。又図10(A)、(B)は、絶縁シートを折り曲げる前の状態を示す正面図及び側面図である。絶縁シート21の形状は、図9(A)、(B)に示すように薄肉連結部10でつながった1枚の絶縁シート21を折り曲げて重ねるようにしてもよい。まず図10(A)、(B)に示すように1枚の絶縁シート21を薄肉連結部10でつながった形状に切りぬく。
Embodiment 2. FIG.
9A is a front view showing the insulating sheet according to the second embodiment, FIG. 9B is a side view of the same, and in FIGS. 9A and 9B, the insulating sheet is bent. Is shown. FIGS. 10A and 10B are a front view and a side view showing a state before the insulating sheet is bent. As for the shape of the insulating sheet 21, as shown in FIGS. 9A and 9B, one insulating sheet 21 connected by the thin connecting portion 10 may be folded and overlapped. First, as shown in FIGS. 10A and 10B, one insulating sheet 21 is cut into a shape connected by a thin connecting portion 10.

そして薄肉連結部10において折り曲げて、図9に示すように2枚が重なった形態にする。その後スロット部2aに沿うように折り曲げてスロット部2aに挿入し、更に絶縁端板3を挿入し、コイルを巻回した後、積層鉄心を円環状に配置して固定子を得る。なお、薄肉連結部10は、巻線領域にかからない位置で、また折り曲げ部7より外側に設けることが望ましく、絶縁シート21のスロット内径側絶縁部4、もしくはスロット外径側絶縁部5に設けることが適切である。   And it bends in the thin connection part 10, and it is set as the form which two sheets overlapped as shown in FIG. Then, it is bent along the slot portion 2a and inserted into the slot portion 2a. Further, after inserting the insulating end plate 3 and winding the coil, the laminated iron core is arranged in an annular shape to obtain a stator. The thin connecting portion 10 is preferably provided at a position that does not cover the winding region and outside the bent portion 7, and is provided at the slot inner diameter side insulating portion 4 or the slot outer diameter side insulating portion 5 of the insulating sheet 21. Is appropriate.

このように薄肉連結部10でつながった絶縁シート21を折り曲げることによって重ねた構造にすることで、実施の形態1で説明した効果に加えて、複数枚の絶縁シートを固定する工程を省くことができる。本説明では2枚の絶縁シートの場合で説明したが、3枚以上の複数枚の絶縁シートで構成してもよい。図11は薄肉連結部10を2箇所設けて3枚の絶縁シートを重ねるようにした場合を示している。尚図9に示すような絶縁シート21を折り曲げた時、絶縁シート21の端は薄肉連結部10で繋がっているため、重ねられた2枚の絶縁シート同士はずれることができないため、図3に示された構造とはずれ方が異なる。本実施形態では薄肉連結部10側から順に折り曲げていくことになるため薄肉連結部10から離れて行くに従いずれが蓄積されていくようになる。又薄肉連結部10でつながった絶縁シート21を折り曲げるようにしたことにより、絶縁端板3の絶縁シート保持部3aを装着する際、絶縁シート保持部3aにおける逃がし部が薄肉連結部10のみで済むという利点がある。即ち薄肉連結部10がない1枚の一続きの細長い絶縁シートを折り曲げることにより重ねた構造にした場合、絶縁シート保持部3aにおける逃がし部が大きくなってしまい、薄肉連結部10のみで済む場合に比べると作業が煩雑となってしまう。   In this way, in addition to the effects described in the first embodiment, the step of fixing a plurality of insulating sheets can be omitted by forming the stacked structure by bending the insulating sheets 21 connected by the thin-walled connecting portions 10. it can. In this description, the case of two insulating sheets has been described. However, the insulating sheet may be composed of three or more insulating sheets. FIG. 11 shows a case where two thin connecting portions 10 are provided and three insulating sheets are stacked. In addition, when the insulating sheet 21 as shown in FIG. 9 is bent, the ends of the insulating sheet 21 are connected by the thin-walled connecting portion 10, and therefore, the two stacked insulating sheets cannot be separated from each other. The way it is off is different. In this embodiment, since it will bend in order from the thin connection part 10 side, it will be accumulated gradually as it leaves | separates from the thin connection part 10. FIG. Further, since the insulating sheet 21 connected by the thin connecting portion 10 is bent, when the insulating sheet holding portion 3a of the insulating end plate 3 is mounted, the escape portion in the insulating sheet holding portion 3a is only the thin connecting portion 10. There is an advantage. That is, in the case of a structure in which a series of elongated insulating sheets without the thin connecting portion 10 are folded and overlapped, the escape portion in the insulating sheet holding portion 3a becomes large, and only the thin connecting portion 10 is required. In comparison, the work becomes complicated.

実施の形態3.
図12は実施の形態3による積層鉄心を示す平面図、図13は同じく斜視図である。又図14は絶縁シートを折り曲げた状態を示す平面断面図である。本実施形態においては、図12に示すように、積層鉄心のスロット部2aを絶縁する部分に加えて巻回されたコイルより構成される巻線体の側部を覆う巻線体側部絶縁部11を有する絶縁シートを用いる。複数枚の絶縁シートを重ねてスロット部2aに沿うように折り曲げた後、積層鉄心のスロット部2aに挿入し、積層鉄心の積層方向の端部に絶縁端板3を装着し、絶縁端板3の絶縁シート保持部3aで絶縁シートを挟持する。巻線後図13に示すように、絶縁シートの巻線体側部絶縁部11を折り曲げて巻線体を包む。その後複数の積層鉄心を環状に接合して固定子が得られる。
Embodiment 3 FIG.
12 is a plan view showing a laminated iron core according to Embodiment 3, and FIG. 13 is a perspective view of the same. FIG. 14 is a plan sectional view showing a state where the insulating sheet is bent. In the present embodiment, as shown in FIG. 12, a winding body side insulating portion 11 that covers a side portion of a winding body constituted by a coil wound in addition to a portion that insulates the slot portion 2a of the laminated core. An insulating sheet having the following is used. After a plurality of insulating sheets are stacked and bent along the slot 2a, they are inserted into the slot 2a of the laminated core, and the insulating end plate 3 is attached to the end of the laminated core in the stacking direction. The insulating sheet is sandwiched by the insulating sheet holding part 3a. After winding, as shown in FIG. 13, the winding body side insulating portion 11 of the insulating sheet is bent to wrap the winding body. Thereafter, a plurality of laminated iron cores are joined in an annular shape to obtain a stator.

以上のように構成することにより巻線の形態にばらつきが生じても隣接する巻線体間の接触を防止できるため、巻回するコイルの数を増やすことができ、スロット占積率を向上させることができる。また絶縁シートは搬送中や仕掛時のずれを防止するため、実施の形態1で示したように、複数の絶縁シートを溶着などの固定方法で固定すると良い。図13に示すように、巻線体側部絶縁部11において、巻線体のコイルエンドの高さまで伸ばしてコイルエンドを覆うようにした端部12で絶縁シート同士を固定するようにすると、絶縁シートの固定部に膨らみが発生した場合でも、巻線体に影響を与えないようにすることができる。上記のように構成することにより、実施の形態1で説明した効果と同様の効果を有する。   By configuring as described above, contact between adjacent winding bodies can be prevented even if variations in the form of the winding occur, so the number of coils to be wound can be increased, and the slot space factor is improved. be able to. Further, in order to prevent the insulation sheet from being shifted during conveyance or in progress, as shown in the first embodiment, a plurality of insulation sheets may be fixed by a fixing method such as welding. As shown in FIG. 13, when the insulating sheets are fixed to each other at the end portion 12 that extends to the height of the coil end of the winding body and covers the coil end in the winding body side insulating portion 11, the insulating sheet Even when a bulge occurs in the fixed portion, it is possible to prevent the winding body from being affected. By configuring as described above, the same effects as those described in the first embodiment are obtained.

更に実施の形態1でも述べた通り、絶縁シートを複数枚の構造とすることで、1枚の絶縁シートを用いるよりも、反発力を低下させることができるため、巻線体側部絶縁部11の折り曲げ力を減少させる効果を奏する。また積層鉄心を環状に接合する際に発生する巻線体側部絶縁部11の反発力が低下するため、作業性が向上する効果を奏する。即ち積層鉄心を環状に接合する際には、巻線体側部絶縁部11を折り曲げた状態で円環状に配置する。そして円環状に配置する際には巻線体側部絶縁部11の反発力を受けた状態で作業するため、この力が大きいと作業性が悪くなる。実施の形態3のように構成することで、絶縁シートを一枚で構成した場合に比べてこの力を低下させた状態で作業をすることができる。   Further, as described in the first embodiment, by using a plurality of insulating sheets, the repulsive force can be reduced as compared with the case of using a single insulating sheet. It has the effect of reducing the bending force. Moreover, since the repulsive force of the winding body side part insulation part 11 which generate | occur | produces when joining a laminated iron core in cyclic | annular form falls, there exists an effect which workability | operativity improves. That is, when the laminated iron cores are joined in an annular shape, the winding body side insulating portions 11 are arranged in an annular shape in a bent state. And when arrange | positioning in an annular | circular shape, since it works in the state which received the repulsive force of the winding body side part insulation part 11, if this force is large, workability | operativity will worsen. By comprising like Embodiment 3, it can work in the state which reduced this force compared with the case where an insulating sheet is comprised with one sheet.

実施の形態4.
図15(A)は実施の形態4による絶縁シートを示す正面図、図15(B)は同じく側面図であり、図15(A)、(B)においては、絶縁シートを折り曲げた後の状態を示している。又図16(A)、(B)は、絶縁シートを折り曲げる前の状態を示す正面図及び側面図である。実施の形態4による絶縁シート41は、図15に示すように巻線体側部絶縁部11の端部12でつながった1枚の絶縁シートを折り曲げた形態にしたものである。図16に示すように絶縁シート41を切り抜き、折り曲げて2枚に重ねた後、スロット部2aに沿うように折り曲げて、スロット部に装着する。以後の工程は上記実施の形態1と同じである。
Embodiment 4 FIG.
15A is a front view showing an insulating sheet according to Embodiment 4, FIG. 15B is a side view of the same, and in FIGS. 15A and 15B, the state after the insulating sheet is bent is shown. Is shown. FIGS. 16A and 16B are a front view and a side view showing a state before the insulating sheet is bent. As shown in FIG. 15, the insulating sheet 41 according to the fourth embodiment is formed by bending one insulating sheet connected at the end 12 of the winding body side insulating portion 11. As shown in FIG. 16, the insulating sheet 41 is cut out, bent and stacked on two sheets, and then bent along the slot portion 2 a and attached to the slot portion. The subsequent steps are the same as those in the first embodiment.

このような形態の絶縁シート41を用いることで、実施の形態3で説明した効果に加えて、絶縁シート同士を固定する工程を省く効果を有する。本実施形態では2枚の絶縁シートを重ねる場合について説明したが、2枚以上の複数枚の絶縁シートが連結された場合に適用しても良い(図11参照)。   By using the insulation sheet 41 of such a form, in addition to the effect demonstrated in Embodiment 3, it has the effect of omitting the process of fixing insulation sheets. Although the case where two insulating sheets are stacked has been described in the present embodiment, the present invention may be applied when two or more insulating sheets are connected (see FIG. 11).

図17(A)は別の形態による絶縁シートを示す正面図、図17(B)は同じく側面図であり、図17(A)、(B)においては、絶縁シートを折り曲げた後の状態を示している。又図18(A)、(B)は、絶縁シートを折り曲げる前の状態を示す正面図及び側面図である。図17(A)、(B)、図18(A)、(B)に示すように、連結部を薄肉連結形状42にすることにより、絶縁シート41を折り曲げる際に加える力を小さくすることができる。   FIG. 17A is a front view showing an insulating sheet according to another embodiment, FIG. 17B is a side view of the same, and in FIGS. 17A and 17B, the state after the insulating sheet is bent is shown. Show. FIGS. 18A and 18B are a front view and a side view showing a state before the insulating sheet is bent. As shown in FIGS. 17A, 17B, 18A, and 18B, the force applied when the insulating sheet 41 is bent can be reduced by forming the connecting portion into the thin-walled connecting shape 42. it can.

実施の形態5.
図19は実施の形態5による固定子のティース部を示す平面断面図である。実施の形態5による絶縁シート形状においては、2枚の絶縁シートの内、内側絶縁シート1aは巻線体側部絶縁部11を有し、外側絶縁シート1bはスロット部2aのみを絶縁する形状である。2枚の内側絶縁シート1a、外側絶縁シート1bを重ね、スロット部2aの形状に沿うように折り曲げ、スロット部2aに装着した後に、絶縁端板3を装着し、絶縁端板3の絶縁シート保持部3aで絶縁シートを挟持する。そして、巻線後、内側絶縁シート1aの巻線体側部絶縁部11を折り曲げて巻線領域9の側部を覆った後、積層鉄心を環状に接合して固定子が得られる。絶縁シート1は搬送中や仕掛時のずれを防止するため、実施の形態1のように、溶着などの固定方法で固定しても良い。
Embodiment 5. FIG.
FIG. 19 is a plan sectional view showing a tooth portion of the stator according to the fifth embodiment. In the insulating sheet shape according to the fifth embodiment, of the two insulating sheets, the inner insulating sheet 1a has a winding body side insulating portion 11, and the outer insulating sheet 1b has a shape that insulates only the slot portion 2a. . The two inner insulating sheets 1a and the outer insulating sheet 1b are overlapped, bent along the shape of the slot portion 2a, attached to the slot portion 2a, the insulating end plate 3 is attached, and the insulating end plate 3 is held. The insulating sheet is sandwiched between the portions 3a. And after winding, after winding body side part insulation part 11 of inner side insulation sheet 1a is covered, the side of winding field 9 is joined, and a lamination iron core is joined annularly and a stator is obtained. Insulating sheet 1 may be fixed by a fixing method such as welding as in the first embodiment in order to prevent deviation during conveyance or in progress.

本実施形態の効果を以下に説明する。図20は一般的な固定子のティース部を示す平面断面図である。図20に示すように、絶縁シートが1枚の形状の場合、巻線体間では4枚の絶縁シートが重なるため、絶縁シートの厚さをtとすると巻線体間の絶縁シートの厚さの和は4tとなり、その分だけ巻線領域9が減少している。一方、本実施形態の絶縁シートの場合、絶縁シートを2枚重ねるようにした場合には、1枚当たりの厚さはt/2となるため、巻線体間の絶縁シートの厚さの合計は、t/2×4=2tとなり、図20に示した形態より薄くすることができる。なお積層鉄心と巻線体間の厚さは、t/2×2=tであるため、図20に示した形状と同じ厚さを確保できる。   The effect of this embodiment is demonstrated below. FIG. 20 is a plan sectional view showing a tooth portion of a general stator. As shown in FIG. 20, when the insulating sheet has a single shape, four insulating sheets overlap between the winding bodies. Therefore, when the thickness of the insulating sheet is t, the thickness of the insulating sheet between the winding bodies. Is 4t, and the winding region 9 is reduced accordingly. On the other hand, in the case of the insulating sheet of this embodiment, when two insulating sheets are stacked, the thickness per sheet is t / 2, so the total thickness of the insulating sheets between the winding bodies is T / 2 × 4 = 2t, which can be made thinner than that shown in FIG. Since the thickness between the laminated iron core and the winding body is t / 2 × 2 = t, the same thickness as the shape shown in FIG. 20 can be secured.

以上のように構成することにより、巻線体間の絶縁シートの厚さが薄くなり、巻線領域9が増加するため、巻線の数を増やし、スロット占積率を向上させることができる。上記の説明では絶縁シートの枚数として2枚に分けた場合で説明したが、3枚以上で構成してもよい。絶縁シートをn枚に分け、巻線体側部絶縁部11を有する絶縁シートを1枚にした場合、巻線体間の絶縁シートの厚さの合計は、t/n×4=4t/nまで薄くすることができる。なお、積層鉄心と巻線体との間の厚さの総和は、t/n×n=tであるため、従来形状と同じ厚さを確保できる。   By comprising as mentioned above, since the thickness of the insulation sheet between winding bodies becomes thin and the winding area | region 9 increases, the number of windings can be increased and a slot space factor can be improved. In the above description, the case where the number of insulating sheets is divided into two has been described. However, the number of insulating sheets may be three or more. When the insulating sheet is divided into n sheets and the insulating sheet having the winding body side insulating portion 11 is made into one sheet, the total thickness of the insulating sheets between the winding bodies is t / n × 4 = 4 t / n Can be thinned. In addition, since the sum total of the thickness between a laminated iron core and a winding body is t / nxn = t, the same thickness as a conventional shape is securable.

また図19においては、内側絶縁シート1aに巻線体側部絶縁部11を設けた場合について説明したが、外側絶縁シート1bに巻線体側部絶縁部を設けてもよい。さらに多くの絶縁シートを用いる場合には、どの位置の絶縁シートに巻線体側部絶縁部を設けてもよい。要するに複数の絶縁シートを用いる場合には複数の絶縁シートのうち少なくとも1つの絶縁シートに巻線体側部絶縁部を設ければ良い。   In FIG. 19, the case where the winding body side insulating portion 11 is provided on the inner insulating sheet 1 a has been described. However, the winding body side insulating portion may be provided on the outer insulating sheet 1 b. When more insulating sheets are used, the winding body side insulating portion may be provided on any position of the insulating sheet. In short, when using a plurality of insulating sheets, a winding body side insulating portion may be provided on at least one of the plurality of insulating sheets.

実施の形態6.
図21(A)は実施の形態6による絶縁シートを示す正面図、図21(B)は同じく側面図であり、図21(A)、(B)においては、絶縁シートを折り曲げた後の状態を示している。又図22(A)、(B)は、絶縁シートを折り曲げる前の状態を示す正面図及び側面図である。図21(A)、(B)、図22(A)、(B)に示すように、巻線体側部絶縁部11を有する絶縁シートと、スロット部2aのみを絶縁する絶縁シートが薄肉連結部60でつながるようにしたものである。薄肉連結部60で折り曲げて2枚を重ねた後、図23に示すようにスロット部2aに合うように折り曲げて、スロット部2aに装着する。以後の工程は上記実施の形態5と同じである。
Embodiment 6 FIG.
FIG. 21A is a front view showing an insulating sheet according to Embodiment 6, FIG. 21B is a side view of the same, and in FIGS. 21A and 21B, the state after the insulating sheet is bent. Is shown. FIGS. 22A and 22B are a front view and a side view showing a state before the insulating sheet is bent. As shown in FIGS. 21A, 21B, 22A, and 22B, the insulating sheet having the winding body side insulating portion 11 and the insulating sheet that insulates only the slot 2a are thin-walled connecting portions. 60 is connected. After being folded at the thin-walled connecting portion 60 and overlapping two sheets, as shown in FIG. 23, it is folded so as to fit the slot portion 2a and is attached to the slot portion 2a. Subsequent steps are the same as those in the fifth embodiment.

巻線体を巻回する位置に連結部を設けると巻線体と接触するためカットが必要であるが、図21、22に示すように、スロット内径側絶縁部4かスロット外径側絶縁部5に薄肉連結部60を設けると、巻線体と接触しないようにできる。薄肉連結部を2箇所設けると、スロットに合うように折り曲げる際に、内側絶縁シートがたるんでしまうため、図21、22に示すように1箇所にする方が良い。なお折り曲げる方向を変えることで、巻線体側部絶縁部11を有する部分が内側にも外側にも配置できる。図23は巻線体側部絶縁部11を内側の絶縁シートに配置した例であり、図24は巻線体側部絶縁部11を外側の絶縁シートに配置した例である。
このような形態の絶縁シートを用いることで、実施の形態5で説明した効果に加えて、絶縁シートを固定する工程を省くことができる。またここでは2枚重ねる場合について説明したが、連結枚数は3枚以上でも良い。
If a connecting portion is provided at a position where the winding body is wound, it needs to be cut to contact the winding body. However, as shown in FIGS. 21 and 22, the slot inner diameter side insulating portion 4 or the slot outer diameter side insulating portion is used. If the thin connection part 60 is provided in 5, it can be prevented from contacting the winding body. If two thin connecting portions are provided, the inner insulating sheet will sag when bent so as to fit into the slot, so it is better to have one as shown in FIGS. In addition, the part which has the winding body side part insulation part 11 can be arrange | positioned inside and outside by changing the bending direction. FIG. 23 is an example in which the winding body side insulating portion 11 is disposed on the inner insulating sheet, and FIG. 24 is an example in which the winding body side insulating portion 11 is disposed on the outer insulating sheet.
By using the insulating sheet having such a form, in addition to the effects described in the fifth embodiment, the step of fixing the insulating sheet can be omitted. Although the case where two sheets are stacked is described here, the number of connected sheets may be three or more.

実施の形態7.
図25は実施の形態7による固定子のティース部を示す平面断面図である。本実施形態においては、2枚の絶縁シートの厚さを変えたものである。例えば図25に示すように、内側絶縁シート1aを薄く形成するとともに、外側絶縁シート1bを厚く形成することができる。そして内側絶縁シート1aのみが巻線体側部絶縁部11を有している。以上のように形成することにより、巻線体間の絶縁シートの厚さを薄くすることができるため、巻線領域を大きくすることができる。ただし同じ厚さの絶縁シート2枚を用いる場合に比べて、外側絶縁シート1bの厚さは厚くなるため、絶縁シートの反発力の低減効果は小さくなる。尚上記のように絶縁シートの厚さを変えることは、上記実施の形態1〜6の全ての形態において適用してもよい。
又本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略したりすることが可能である。
Embodiment 7 FIG.
FIG. 25 is a plan sectional view showing a tooth portion of the stator according to the seventh embodiment. In this embodiment, the thickness of the two insulating sheets is changed. For example, as shown in FIG. 25, the inner insulating sheet 1a can be formed thin and the outer insulating sheet 1b can be formed thick. Only the inner insulating sheet 1 a has the winding body side insulating portion 11. By forming as described above, the thickness of the insulating sheet between the winding bodies can be reduced, so that the winding area can be increased. However, since the outer insulating sheet 1b is thicker than when two insulating sheets having the same thickness are used, the effect of reducing the repulsive force of the insulating sheet is reduced. Note that changing the thickness of the insulating sheet as described above may be applied to all of the first to sixth embodiments.
Also, within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

Claims (8)

ティース毎に分割された複数の鉄心を積層して得られる積層鉄心が環状に配置された電動機の固定子であって、
上記鉄心の両側において設置された凹状のスロット部の形状に合わせて折り曲げられた複数の絶縁シートを備え、
上記ティースに巻回されたコイルと上記鉄心との間に上記複数の絶縁シートを介在させることにより上記鉄心と上記コイルとを絶縁させた電動機の固定子。
A stator of an electric motor in which a laminated iron core obtained by laminating a plurality of iron cores divided for each tooth is arranged in an annular shape,
Comprising a plurality of insulating sheets bent according to the shape of the concave slot portion installed on both sides of the iron core;
An electric motor stator in which the iron core and the coil are insulated by interposing the plurality of insulating sheets between the coil wound around the teeth and the iron core.
巻回された上記コイルより構成される巻線体の側部を覆う巻線体側部絶縁部を上記複数の絶縁シートのうち少なくとも1つの絶縁シートに設けた請求項1に記載の電動機の固定子。 The stator of an electric motor according to claim 1, wherein a winding body side insulating portion covering a side portion of the winding body constituted by the wound coil is provided on at least one insulating sheet among the plurality of insulating sheets. . 上記巻線体側部絶縁部に上記巻線体のコイルエンドを覆う端部を設けた請求項2に記載の電動機の固定子。 The stator for an electric motor according to claim 2, wherein an end portion that covers a coil end of the winding body is provided on the winding body side insulating portion. 上記複数の絶縁シートは、上記端部でつながった1枚のシートが上記端部において折り曲げられ重ねられている請求項3に記載の電動機の固定子。 The stator for an electric motor according to claim 3, wherein the plurality of insulating sheets are obtained by bending and overlapping one sheet connected at the end portion at the end portion. 上記複数の絶縁シートは、薄肉連結部でつながった1枚のシートが上記薄肉連結部において折り曲げられ重ねられている請求項1から請求項4のいずれか1項に記載の電動機の固定子。 5. The electric motor stator according to claim 1, wherein each of the plurality of insulating sheets includes a single sheet connected at a thin-walled connecting portion and folded and overlapped at the thin-walled connecting portion. 上記薄肉連結部は、上記コイルによる巻線領域にかからない位置である上記絶縁シートのスロット内径側絶縁部あるいはスロット外径側絶縁部に設けた請求項5に記載の電動機の固定子。 The stator for an electric motor according to claim 5, wherein the thin-walled connecting portion is provided in a slot inner diameter side insulating portion or a slot outer diameter side insulating portion of the insulating sheet, which is a position that does not cover a winding region of the coil. 上記複数の絶縁シートの厚さは全て同じである請求項1から請求項6のいずれか1項に記載の電動機の固定子。 The stator of the electric motor according to any one of claims 1 to 6, wherein the thicknesses of the plurality of insulating sheets are all the same. 上記複数の絶縁シート間において絶縁シートの厚さを変えた請求項1から請求項6のいずれか1項に記載の電動機の固定子。 The stator of the electric motor according to any one of claims 1 to 6, wherein a thickness of the insulating sheet is changed between the plurality of insulating sheets.
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