JP3607849B2 - Electric motor stator core - Google Patents

Electric motor stator core Download PDF

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Publication number
JP3607849B2
JP3607849B2 JP2000042831A JP2000042831A JP3607849B2 JP 3607849 B2 JP3607849 B2 JP 3607849B2 JP 2000042831 A JP2000042831 A JP 2000042831A JP 2000042831 A JP2000042831 A JP 2000042831A JP 3607849 B2 JP3607849 B2 JP 3607849B2
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Japan
Prior art keywords
back yoke
electric motor
motor stator
joint
stator core
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JP2000042831A
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Japanese (ja)
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JP2001238376A (en
Inventor
浩二 増本
智明 及川
庸賀 田島
修 風間
政紀 加藤
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2000042831A priority Critical patent/JP3607849B2/en
Priority to TW090103126A priority patent/TW508891B/en
Priority to US09/783,976 priority patent/US20010030483A1/en
Priority to KR10-2001-0008315A priority patent/KR100401083B1/en
Priority to CNB011028882A priority patent/CN1162952C/en
Publication of JP2001238376A publication Critical patent/JP2001238376A/en
Priority to US10/247,474 priority patent/US6858964B2/en
Priority to US10/247,492 priority patent/US6856064B2/en
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Description

【０００１】
【発明の属する技術分野】
この発明は、空気調和機や冷凍機に使用される圧縮機駆動用の電動機、特に電動機固定子鉄心に関するものである。
【０００２】
【従来の技術】
図５は出願人が特願平１１−０２０１２８号で示した従来の電動機の平面図である。図において、３は磁性材料からなる板状の磁極片部で、一端側縁部表裏面に連結手段として凹部３ａ及び凸部３ｂが形成されるとともに、その端面３ｃはこれら凹部３ａ及び凸部３ｂの中心を中心とした円弧状に形成され、他端側には相隣なる磁極片部３の端面３ｃと嵌合可能な端面３ｄが形成されている。４は複数の磁極片部３が各端面３ｃ、３ｄを介して配列された第１のコア部材である。
【０００３】
図６に示すように、５は各磁極片部３が第１のコア部材４とは長手方向に互い違いに配列された第２のコア部材であり、第１のコア部材４と交互に積層され積層方向に相隣なる磁極片部３同士の凹部３ａ及び凸部３ｂが嵌合されることにより回転自在に連結されている。６は各磁極片部３に巻回された巻線、７は積層された両コア部材の各磁極片部３の凹部３ａ及び凸部３ｂを回転させることにより環状に形成された鉄心である。
【０００４】
次に、上記のように構成された従来の鉄心の製造方法について説明する。
先ず、図７に矢印Ａで示す位置において、第１のコア部材４を加工する第１段階として、図中ハッチングで示す部分をプレス打ち抜きすることにより両端面３ｃ、３ｄの周辺部を形成する。又、矢印Ｂで示す位置においては、第２のコア部材５を加工する第１段階として、図中ハッチングで示す部分をプレス打ち抜きすることにより両端面３ｃ、３ｄの周辺部を形成する。なお、上記プレス打ち抜き動作によって、磁極片部３の円弧状の端面３ｃが形成された側の端部の表裏面には、図８に示すようにそれぞれ嵌合可能な凹部３ａ及び凸部３ｂ形成されるとともに、最上層となるコア片３には凸部３ｂが嵌合可能な穴部３ｈが形成される。
【０００５】
次いで、図７に矢印Ｃで示す位置において、矢印Ａで示す位置において両端面３ｃ、３ｄの周辺部が形成された部分と、矢印Ｂで示す位置において両端面３ｃ、３ｄの周辺部が形成された部分を、順次交互に図中ハッチングで示す部分をプレス打ち抜きすることにより、それぞれ第１のコア部材４及び第２のコア部材５が形成され、これら両コア部材は金型内で順次積層される。
【０００６】
その後巻線６を巻回し、各磁極片部３の積層方向で相対向する凹部３ａ及び３ｂを回転させることにより、環状に形成することにより鉄心７が完成する。
【０００７】
また、図９は環状成形後の鉄心の一部であり、図９において２は巻線６が巻回されている空間であるスロット２である。また、２ａはスロット２の底部である。図１８では本来巻線６が存在するが説明のため省略している。
【０００８】
【発明が解決しようとする課題】
従来の電動機固定子鉄心は上記のように構成されており、環状に形成される際に構成されるスロット２の底部２ａは図９に示すように鋭い角部となり、鉄心７を環状に形成する際の荷重を受けると、圧縮の応力がその角部に集中する。また電動機は圧縮機等に組込まれる際ハウジング等に焼ばめや圧入により固着されるがこの際も上記角部には圧縮の応力が集中する。このため、磁性材料の磁気的性能が損なわれ、電動機の効率を悪化させたり、十分な剛性を保つことができなくなり、電動機の運転中に振動や騒音を発生される問題点があった。
【０００９】
この発明は上記のような問題点を解消するためになされたもので、電動機の製作時や組込み時に発生するスロット底部の応力を緩和させることにより、電動機の効率悪化や振動、騒音を低減させることができる電動機固定子鉄心を提供することを目的とする。
【００１０】
【課題を解決するための手段】
この発明に係る電動機固定子鉄心は、バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部がバックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、磁極片部は内径側端部に内側に突出した突出部を有し、この突出部により環状に形成後にバックヨーク部とティース部により構成されるスロット底部が曲線をなすように構成したことを特徴とする。
【００１１】
また、この発明に係る電動機固定子鉄心は、ティース部に装着され、ティース部の壁面を覆うと共にバックヨーク部の突出部を覆う絶縁部材を備え、絶縁部材のバックヨーク側壁面とティース部の壁面とが略９０°をなし、突出部を覆うように装着されることを特徴とする。
【００１２】
また、この発明に係る電動機固定子鉄心は、バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部がバックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、バックヨークの外周のジョイント部に対向する位置に軸方向に切欠き部を備え、切欠き部の周方向の長さを変えることにより、剛性を保ちつつジョイント部に発生する応力を最小限とどめ、且つ接触力を最小限にとどめ接触抵抗を上げることにより渦電流による効率低下を最小とすることを特徴とする。
【００１３】
また、この発明に係る電動機固定子鉄心は、バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部がバックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、バックヨークの外周のティース部に対向する位置に軸方向に切欠き部を備え、電動機組立時のジョイント部に加わる圧縮応力を最小限にとどめることを特徴とする。
【００１４】
【発明の実施の形態】
実施の形態１．
以下、この発明の実施の形態１を図面を参照して説明する。
図１，２は実施の形態１を示す図で、図１は電動機の平面図、図２は電動機の巻線の巻回方法を説明する電動機の一部を示す平面図である。
図１において、３は磁性材料からなる板状の磁極片部、９は磁極片部３に設けられたジョイント部で磁極片部３の一端側縁部表裏面に連結手段として凹部３ａ及び凸部３ｂで構成されている。４は複数の磁極片部３が各端面３ｃ、３ｄを介して配列された第１のコア部材である。
【００１５】
５は第２のコア部材で、第１のコア部材４と交互に積層され積層方向に相隣なる磁極片部３同士の凹部３ａ及び凸部３ｂが嵌合されることにより回転自在に連結されている。７は積層された両コア部材のジョイント部９を各磁極片部３のジョイント部９の凹部３ａ及び凸部３ｂを回転させ、環状に形成された鉄心である。
【００１６】
また、３ｅは磁極片部３のバックヨーク部、３ｆはティース部である。
また、２はバックヨーク部３ｅとティース部３ｆとにより構成されるスロットで、２ａはスロットの底部である。スロットの底部２ａは第１のコア部材４と第２のコア部材５のバックヨーク部３ｅで構成されるがその形状は曲線をなし、鋭い角となっていない。
【００１７】
また、８はティース部３ｆに装着され、ティース部３ｆの壁面を覆う絶縁部材であり、バックヨーク側壁面とティース部３ｆの壁面とが略９０°をなし、さらにバックヨーク部３ｅの突出部３ｇを覆うように位置している。
【００１８】
本実施の形態では、本来スロット２内には巻線が存在しているが、図１においては説明の為図示は省略している。また、一部絶縁部材８も図示は省略している。
【００１９】
上記のように構成されているので、鉄心７を環状に形成する際や電動機固定子をハウジング等に圧入や焼ばめにより固着される際にスロット底部２ａが曲線をなしているため圧縮の応力が集中することなく磁性材料の磁気的性能が損なわれること無く、電動機の効率を悪化させたり、十分な剛性を保つことができなくなり、電動機の運転中に振動や騒音を発生される問題点が発生することがない。
【００２０】
また、このスロット底部２ａを曲線で形成した場合、突出部３ｇが形成される。巻線６は図２に示すようにノズルがティース部３ｆに対し、常に平行となる姿勢で巻回されるが、その際に突出部３ｇは巻線６の巻回時に巻線を傷付ける恐れがあったり、傷付を防止するために、バックヨーク３ｅ側に巻線６を巻回できないスペースができてしまうが、絶縁部材８がティース部３ｆに装着され、突出部３ｇを覆うように具備されているため、巻線６の傷付かせることなく、巻線６を無駄なスペースなく巻回できる。
【００２１】
実施の形態２．
以下、この発明の実施の形態２を図面を参照して説明する。
図３は実施の形態２を示す図で、電動機の平面図である。図において、３は磁性材料からなる板状の磁極片部、９は磁極片部３に設けられたジョイント部で、磁極片部３の一端側縁部表裏面に設けられた連結手段としての凹部３ａ及び凸部３ｂで構成されている。４は複数の磁極片部３が各端面３ｃ、３ｄを介して配列された第１のコア部材である。
【００２２】
５は第２のコア部材で、第１のコア部材４と交互に積層され積層方向に相隣なる磁極片部３同士の凹部３ａ及び凸部３ｂが嵌合されることにより回転自在に連結されている。７は積層された両コア部材のジョイント部９を各磁極片部３のジョイント部９の凹部３ａ、凸部３ｂを回転させ、環状に形成された鉄心である。
【００２３】
また、３ｅは磁極片部３のバックヨーク部、３ｆはティース部である。１０はジョイント部９に対向する位置に形成された軸方向に伸びる切欠き部である。本実施の形態では本来、スロット２内には巻線が存在しているが図３においては説明の為、図示は省略している。
【００２４】
電動機固定子をハウジング等に圧入や焼ばめにより固着される際にジョイント部９に対向する位置に軸方向に伸びる切欠き部が形成されているため電動機固定子とハウジングはジョイント部９付近で直接、押圧されることがなく、ジョイント部９に電動機固定子のハウジングへの圧入や焼ばめの際に加わる荷重を切欠き部１０の大きさで調節することができる。
【００２５】
従って、適度な切欠き部１０の周方向の長さを選択することにより、剛性を保ちつつジョイント部９に発生する応力を最小限とどめることができる。また、ジョイント部９は鉄心７を形成時や凹部３ａ、凸部３ｂ形成時に磁性材料の絶縁皮膜が剥がれ、各コア部材４同士の絶縁抵抗が落ちており電動機運転時に渦電流が発生し、電動機の効率が落ちる。
【００２６】
これもまた、切欠き部１０の周方向の長さを変えることにより、接触力を最小限にとどめ接触抵抗を上げることにより渦電流による効率低下を最小とすることができる。よって、磁性材料の磁気的性能が損なわれることや渦電流により電動機の効率を悪化させたりすることなく、十分な剛性を保つことができる。
【００２７】
実施の形態３．
以下、この発明の実施の形態２を図面を参照して説明する。
図４は実施の形態３を示す図で、電動機の平面図である。図において、３は磁性材料からなる板状の磁極片部、９は磁極片部３に設けられたジョイント部で、磁極片部３の一端側縁部表裏面に設けられた連結手段としての凹部３ａ及び凸部３ｂで構成されている。４は複数の磁極片部３が各端面３ｃ、３ｄを介して配列された第１のコア部材である。
【００２８】
５は第２のコア部材で、第１のコア部材４と交互に積層され積層方向に相隣なる磁極片部３同士の凹部３ａ及び凸部３ｂが嵌合されることにより回転自在に連結されている。７は積層された両コア部材のジョイント部９を各磁極片部３のジョイント部９の凹部３ａ及び凸部３ｂを回転させ、環状に形成された鉄心である。
【００２９】
また、３ｅは磁極片部３のバックヨーク部、３ｆはティース部である。１１はティース部３ｆに対向する位置に形成された軸方向に伸びる切欠き部である。
本実施の形態では本来、スロット２内には巻線が存在しているが図４においては説明の為、図示は省略している。
【００３０】
切欠き部１１の周方向の長さを変えることにより、電動機固定子をハウジング等に圧入や焼ばめにより固着される際の接触面積を変えることができるので、適切な保持力を得てかつ電動機固定子への圧縮の応力を最小限にとどめることができる。
【００３１】
また、切欠き部１１はティース部３ｆに対向するように位置しており、電動機運転中の磁束密度は他の部分に比べ低く、電動機の効率低下は他の部分に切欠き部を設けた場合に比べ、影響は少ない。
【００３２】
【発明の効果】
この発明に係る電動機固定子鉄心は、磁極片部は内径側端部に内側に突出した突出部を有し、この突出部により環状に形成後にバックヨーク部とティース部により構成されるスロット底部が曲線をなすように構成したことにより、鉄心を環状に形成する際や電動機固定子をハウジング等に圧入や焼ばめにより固着される際にスロット底部が曲線をなしているため圧縮の応力が集中することなく磁性材料の磁気的性能が損なわれること無く、電動機の効率を悪化させたり、十分な剛性を保つことができなくなり、電動機の運転中に振動や騒音を発生される問題点が発生する恐れが少ない。
【００３３】
また、この発明に係る電動機固定子鉄心は、ティース部に装着され、ティース部の壁面を覆うと共にバックヨーク部の突出部を覆う絶縁部材を備え、絶縁部材のバックヨーク側壁面とティース部の壁面とが略９０°をなし、突出部を覆うように装着されることにより、突出部が巻線の巻回時に巻線を傷付ける恐れが少ない。
【００３４】
また、この発明に係る電動機固定子鉄心は、バックヨークの外周のジョイント部に対向する位置に軸方向に切欠き部を備え、切欠き部の周方向の長さを変えることにより、剛性を保ちつつジョイント部に発生する応力を最小限とどめ、且つ接触力を最小限にとどめ接触抵抗を上げることにより渦電流による効率低下を最小とすることにより、鉄心を環状に形成する際や電動機固定子をハウジング等に圧入や焼ばめにより固着される際にジョイント部に発生する応力を緩和でき、またジョイント部の渦電流による損失を緩和できるので電動機の効率を悪化させたり、十分な剛性を保つことができなくなり、電動機の運転中に振動や騒音の問題点が発生する恐れが少ない。
【００３５】
また、この発明に係る電動機固定子鉄心は、バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部がバックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、バックヨークの外周のティース部に対向する位置に軸方向に切欠き部を備え、電動機組立時のジョイント部に加わる圧縮応力を最小限にとどめるたことにより、鉄心を環状に形成する際や電動機固定子をハウジング等に圧入や焼ばめにより固着される際に圧縮の応力を緩和させることができるので磁性材料の磁気的性能が損なわれること無く、電動機の効率を悪化させたり、十分な剛性を保つことができなくなり、電動機の運転中に振動や騒音の問題点が発生する恐れが少ない。
【図面の簡単な説明】
【図１】実施の形態１を示す図で、電動機の平面図である。
【図２】実施の形態１を示す図で、電動機の巻線の巻回方法を説明する電動機の一部を示す平面図である。
【図３】実施の形態２を示す図で、電動機の平面図である。
【図４】実施の形態３を示す図で、電動機の平面図である。
【図５】従来の電動機を示す平面図である。
【図６】従来の電動機の一部を示す平面図である。
【図７】従来の電動機の製造方法を示す概念図である。
【図８】従来の電動機の一部を示す平面図である。
【図９】従来の電動機の一部を示す平面図である。
【符号の説明】
２ スロット、２ａ スロット底部、３ 磁極片部、３ａ 凹部、３ｂ 凸部、３ｃ 端面、３ｄ 端面、３ｅ バックヨーク部、３ｆ ティース部、３ｇ 突出部、４ 第１のコア部材、５ 第２のコア部材、６ 巻線、７ 鉄心、８ 絶縁部材、９ ジョイント部、１０，１１ 切欠き部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric motor for driving a compressor used in an air conditioner or a refrigerator, and particularly to an electric motor stator core.
[0002]
[Prior art]
FIG. 5 is a plan view of a conventional electric motor shown by the applicant in Japanese Patent Application No. 11-020128. In the figure, reference numeral 3 denotes a plate-shaped magnetic pole piece made of a magnetic material. A concave portion 3a and a convex portion 3b are formed as connecting means on the front and back surfaces of one end side edge portion, and the end surface 3c has the concave portion 3a and the convex portion 3b. An end face 3d that can be fitted to the end face 3c of the adjacent magnetic pole piece 3 is formed on the other end side. Reference numeral 4 denotes a first core member in which a plurality of magnetic pole piece portions 3 are arranged via end faces 3c and 3d.
[0003]
As shown in FIG. 6, reference numeral 5 denotes a second core member in which the magnetic pole piece portions 3 are alternately arranged in the longitudinal direction with respect to the first core member 4, and is laminated alternately with the first core members 4. The concave portions 3a and the convex portions 3b of the magnetic pole piece portions 3 adjacent to each other in the stacking direction are fitted together so as to be freely rotatable. Reference numeral 6 denotes a winding wound around each magnetic pole piece portion 3, and 7 denotes an iron core formed in an annular shape by rotating the concave portion 3a and the convex portion 3b of each magnetic pole piece portion 3 of the laminated core members.
[0004]
Next, a method for manufacturing a conventional iron core configured as described above will be described.
First, at the position indicated by the arrow A in FIG. 7, as the first stage of processing the first core member 4, the peripheral portions of both end faces 3c and 3d are formed by press punching the hatched portions in the drawing. Further, at the position indicated by the arrow B, as the first stage of processing the second core member 5, the peripheral portions of the end faces 3c and 3d are formed by press punching the hatched portions in the drawing. In addition, as shown in FIG. 8, a recess 3a and a protrusion 3b are formed on the front and back surfaces of the end of the pole piece 3 on the side where the arc-shaped end surface 3c is formed by the press punching operation. At the same time, a hole 3h into which the convex portion 3b can be fitted is formed in the core piece 3 which is the uppermost layer.
[0005]
Next, at the position indicated by arrow C in FIG. 7, the peripheral portion of both end faces 3c and 3d is formed at the position indicated by arrow A, and the peripheral portion of both end faces 3c and 3d is formed at the position indicated by arrow B. The first core member 4 and the second core member 5 are respectively formed by alternately punching out the portions indicated by hatching in the figure, and these core members are sequentially laminated in the mold. The
[0006]
Thereafter, the winding 6 is wound and the recesses 3a and 3b facing each other in the stacking direction of the magnetic pole piece portions 3 are rotated to form an annular shape, thereby completing the iron core 7.
[0007]
FIG. 9 shows a part of the iron core after annular molding. In FIG. 9, reference numeral 2 denotes a slot 2 which is a space around which the winding 6 is wound. Reference numeral 2 a denotes the bottom of the slot 2. In FIG. 18, the winding 6 originally exists but is omitted for explanation.
[0008]
[Problems to be solved by the invention]
The conventional motor stator iron core is configured as described above, and the bottom 2a of the slot 2 formed when formed in an annular shape is a sharp corner as shown in FIG. 9, and the iron core 7 is formed in an annular shape. When the load is applied, the compressive stress is concentrated on the corner. In addition, when the electric motor is assembled in a compressor or the like, the electric motor is fixed to the housing or the like by shrink fitting or press-fitting, and also in this case, compression stress concentrates on the corner portion. For this reason, the magnetic performance of the magnetic material is impaired, the efficiency of the electric motor is deteriorated and sufficient rigidity cannot be maintained, and there is a problem that vibration and noise are generated during operation of the electric motor.
[0009]
The present invention was made to solve the above problems, and by reducing the stress at the bottom of the slot that occurs during the manufacture and assembly of the motor, the efficiency of the motor is reduced and vibration and noise are reduced. An object of the present invention is to provide an electric motor stator core that can be used.
[0010]
[Means for Solving the Problems]
The motor stator core according to the present invention includes a concave portion and a convex portion provided on the front and back surfaces, wherein a plurality of magnetic pole pieces having a back yoke portion and teeth portions protruding from the back yoke portion are formed on the back yoke portion. In the stator core of the motor, which is connected in a foldable manner through a joint part composed of parts and formed into an annular shape by bending the joint part of this connecting core after winding, the magnetic pole piece part is on the inner diameter side end part It has a protrusion that protrudes, characterized in that the slot bottom constituted by a back yoke portion and the tooth portions after the formation annularly have configured so as to form a curve by the protrusion.
[0011]
The motor stator core according to the present invention includes an insulating member that is attached to the tooth portion and covers the wall surface of the tooth portion and covers the protruding portion of the back yoke portion, and the back yoke side wall surface of the insulating member and the wall surface of the tooth portion. name the Togaryaku 90 °, characterized in that it is mounted so as to cover the protrusion.
[0012]
In addition, the motor stator core according to the present invention is a concave portion provided on the front and back surfaces, in which a plurality of magnetic pole pieces having a back yoke portion and teeth portions protruding from the back yoke portion are formed in the back yoke portion. In the stator core of the motor stator, which is connected in a foldable manner through a joint part composed of convex parts and is formed into an annular shape by bending the joint part of the connecting core after winding, the joint part on the outer periphery of the back yoke By providing a notch in the axial direction at the opposite position and changing the circumferential length of the notch, the stress generated in the joint is minimized while maintaining rigidity and the contact force is minimized. It is characterized by minimizing the decrease in efficiency due to eddy current by increasing the contact resistance .
[0013]
In addition, the motor stator core according to the present invention is a concave portion provided on the front and back surfaces, in which a plurality of magnetic pole pieces having a back yoke portion and teeth portions protruding from the back yoke portion are formed in the back yoke portion. In the motor stator iron core that is connected in a foldable manner through a joint portion constituted by convex portions and is formed into an annular shape by bending the joint portion of the connecting iron core after winding, the teeth portion on the outer periphery of the back yoke A notch part is provided in the axial direction at the opposite position, and the compressive stress applied to the joint part at the time of assembling the electric motor is minimized .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
1 and 2 are diagrams showing the first embodiment, in which FIG. 1 is a plan view of the motor, and FIG. 2 is a plan view showing a part of the motor for explaining a winding method of the winding of the motor.
In FIG. 1, 3 is a plate-shaped magnetic pole piece made of a magnetic material, 9 is a joint provided on the magnetic pole piece 3, and a concave portion 3 a and a convex portion as connection means on the front and back surfaces of one end side edge of the magnetic pole piece 3. 3b. Reference numeral 4 denotes a first core member in which a plurality of magnetic pole piece portions 3 are arranged via end faces 3c and 3d.
[0015]
Reference numeral 5 denotes a second core member that is alternately connected to the first core member 4 and is rotatably connected by fitting the concave portions 3a and the convex portions 3b of the magnetic pole piece portions 3 adjacent to each other in the stacking direction. ing. Reference numeral 7 denotes an iron core formed in an annular shape by rotating the concave portions 3a and convex portions 3b of the joint portions 9 of the magnetic pole piece portions 3 through the joint portions 9 of the laminated core members.
[0016]
Reference numeral 3e denotes a back yoke portion of the magnetic pole piece portion 3, and 3f denotes a teeth portion.
Reference numeral 2 denotes a slot composed of the back yoke portion 3e and the tooth portion 3f, and 2a denotes a bottom portion of the slot. The bottom 2a of the slot is constituted by the first core member 4 and the back yoke portion 3e of the second core member 5, but its shape is curved and does not have a sharp corner.
[0017]
Reference numeral 8 denotes an insulating member that is attached to the tooth portion 3f and covers the wall surface of the tooth portion 3f. The back yoke side wall surface and the wall surface of the tooth portion 3f form approximately 90 °, and the protruding portion 3g of the back yoke portion 3e. It is located so as to cover.
[0018]
In the present embodiment, the winding is originally present in the slot 2, but the illustration is omitted in FIG. Further, the illustration of the partially insulating member 8 is also omitted.
[0019]
Since it is configured as described above, when the iron core 7 is formed in an annular shape or when the motor stator is fixed to the housing or the like by press-fitting or shrink-fitting, the slot bottom 2a is curved so that the compression stress Without concentrating, the magnetic performance of the magnetic material is not impaired, the efficiency of the motor is deteriorated and sufficient rigidity cannot be maintained, and vibration and noise are generated during operation of the motor. It does not occur.
[0020]
Moreover, when this slot bottom part 2a is formed in a curve, the protrusion part 3g is formed. As shown in FIG. 2, the winding 6 is wound in a posture in which the nozzle is always parallel to the tooth portion 3f. At this time, the protruding portion 3g may damage the winding when the winding 6 is wound. In order to prevent damage or damage, there is a space in which the winding 6 cannot be wound on the back yoke 3e side, but the insulating member 8 is mounted on the tooth portion 3f and provided to cover the protruding portion 3g. Therefore, the winding 6 can be wound without useless space without damaging the winding 6.
[0021]
Embodiment 2. FIG.
Embodiment 2 of the present invention will be described below with reference to the drawings.
FIG. 3 shows the second embodiment and is a plan view of the electric motor. In the figure, 3 is a plate-shaped magnetic pole piece made of a magnetic material, 9 is a joint provided in the magnetic pole piece 3, and a concave portion as a connecting means provided on the front and back surfaces of one end side edge of the magnetic pole piece 3. It is comprised by 3a and the convex part 3b. Reference numeral 4 denotes a first core member in which a plurality of magnetic pole piece portions 3 are arranged via end faces 3c and 3d.
[0022]
Reference numeral 5 denotes a second core member that is alternately connected to the first core member 4 and is rotatably connected by fitting the concave portions 3a and the convex portions 3b of the magnetic pole piece portions 3 adjacent to each other in the stacking direction. ing. Reference numeral 7 denotes an iron core formed in an annular shape by rotating the concave portions 3a and convex portions 3b of the joint portions 9 of the magnetic pole piece portions 3 through the joint portions 9 of the laminated core members.
[0023]
Reference numeral 3e denotes a back yoke portion of the magnetic pole piece portion 3, and 3f denotes a teeth portion. Reference numeral 10 denotes a notch that extends in the axial direction and is formed at a position facing the joint 9. In the present embodiment, the winding is originally present in the slot 2, but the illustration is omitted in FIG.
[0024]
When the motor stator is fixed to the housing or the like by press-fitting or shrink fitting, a notch portion extending in the axial direction is formed at a position facing the joint portion 9, so the motor stator and the housing are located near the joint portion 9. Without being directly pressed, the load applied to the joint portion 9 when the motor stator is press-fitted into the housing or shrink fit can be adjusted by the size of the notch portion 10.
[0025]
Therefore, by selecting an appropriate circumferential length of the notch 10, it is possible to minimize the stress generated in the joint 9 while maintaining rigidity. In addition, when the iron core 7 is formed or when the concave portion 3a and the convex portion 3b are formed, the joint portion 9 peels off the insulating film of the magnetic material, and the insulation resistance between the core members 4 is reduced, and an eddy current is generated during motor operation. Efficiency drops.
[0026]
Again, by changing the circumferential length of the notch 10, the contact force is minimized and the contact resistance is increased, thereby minimizing the decrease in efficiency due to the eddy current. Therefore, sufficient rigidity can be maintained without deteriorating the magnetic performance of the magnetic material or deteriorating the efficiency of the electric motor due to eddy currents.
[0027]
Embodiment 3 FIG.
Embodiment 2 of the present invention will be described below with reference to the drawings.
FIG. 4 shows the third embodiment and is a plan view of the electric motor. In the figure, 3 is a plate-shaped magnetic pole piece made of a magnetic material, 9 is a joint provided in the magnetic pole piece 3, and a concave portion as a connecting means provided on the front and back surfaces of one end side edge of the magnetic pole piece 3. It is comprised by 3a and the convex part 3b. Reference numeral 4 denotes a first core member in which a plurality of magnetic pole piece portions 3 are arranged via end faces 3c and 3d.
[0028]
Reference numeral 5 denotes a second core member that is alternately connected to the first core member 4 and is rotatably connected by fitting the concave portions 3a and the convex portions 3b of the magnetic pole piece portions 3 adjacent to each other in the stacking direction. ing. Reference numeral 7 denotes an iron core formed in an annular shape by rotating the concave portions 3a and convex portions 3b of the joint portions 9 of the magnetic pole piece portions 3 through the joint portions 9 of the laminated core members.
[0029]
Reference numeral 3e denotes a back yoke portion of the magnetic pole piece portion 3, and 3f denotes a teeth portion. 11 is a notch part extended in the axial direction formed in the position facing the teeth part 3f.
In the present embodiment, the winding is inherently present in the slot 2, but the illustration is omitted in FIG.
[0030]
By changing the circumferential length of the notch 11, the contact area when the motor stator is fixed to the housing or the like by press-fitting or shrink fitting can be changed. The compressive stress on the motor stator can be minimized.
[0031]
Further, the notch portion 11 is positioned so as to face the tooth portion 3f, and the magnetic flux density during operation of the motor is lower than that of the other portion, and the motor efficiency is reduced when the notch portion is provided in the other portion. The impact is less than that.
[0032]
【The invention's effect】
In the motor stator iron core according to the present invention, the pole piece portion has a protruding portion that protrudes inwardly at the inner diameter side end portion, and the slot bottom portion constituted by the back yoke portion and the tooth portion is formed in an annular shape by this protruding portion. by have configured so as to form a curve, the compressive stress for slot bottom when it is fixed by and electric motor stator housings or the like press-fitting or shrink-time of forming the iron core ring is curvilinear Without concentrating, the magnetic performance of the magnetic material is not impaired, the efficiency of the motor is deteriorated and sufficient rigidity cannot be maintained, and there is a problem that vibration and noise are generated during operation of the motor There is little fear to do.
[0033]
The motor stator core according to the present invention includes an insulating member that is attached to the tooth portion and covers the wall surface of the tooth portion and covers the protruding portion of the back yoke portion, and the back yoke side wall surface of the insulating member and the wall surface of the tooth portion. it name the Togaryaku 90 °, by being mounted so as to cover the protruding portion is less risk that the protruding portion is hurt winding at the time of winding of the winding.
[0034]
In addition, the motor stator core according to the present invention includes a notch portion in the axial direction at a position facing the joint portion on the outer periphery of the back yoke , and maintains rigidity by changing the circumferential length of the notch portion. While minimizing the decrease in efficiency due to eddy currents by minimizing the stress generated in the joint and minimizing the contact force and increasing the contact resistance , The stress generated in the joint when it is fixed to the housing by press-fitting or shrink fitting can be relieved, and the loss due to the eddy current in the joint can be relieved, so the efficiency of the motor is deteriorated and sufficient rigidity is maintained. The problem of vibration and noise during operation of the electric motor is less likely to occur.
[0035]
In addition, the motor stator core according to the present invention is a concave portion provided on the front and back surfaces, in which a plurality of magnetic pole pieces having a back yoke portion and teeth portions protruding from the back yoke portion are formed on the back yoke portion. And a stator stator core formed in an annular shape by bending the joint portion of the connecting iron core after winding, to the teeth portion on the outer periphery of the back yoke. By providing notches in the axial direction at opposing positions and minimizing the compressive stress applied to the joint when assembling the motor, when the iron core is formed in an annular shape, the motor stator is press-fitted or fired into the housing, etc. Compressive stress can be relieved when fixed with a fit, reducing the efficiency of the motor without compromising the magnetic performance of the magnetic material. Ri, it becomes impossible to maintain a sufficient rigidity, less risk of problems of vibration and noise is generated during operation of the motor.
[Brief description of the drawings]
FIG. 1 shows the first embodiment and is a plan view of an electric motor.
FIG. 2 is a diagram showing the first embodiment, and is a plan view showing a part of the electric motor for explaining a winding method of the winding of the electric motor.
FIG. 3 is a diagram showing a second embodiment and is a plan view of an electric motor.
FIG. 4 shows the third embodiment and is a plan view of the electric motor.
FIG. 5 is a plan view showing a conventional electric motor.
FIG. 6 is a plan view showing a part of a conventional electric motor.
FIG. 7 is a conceptual diagram showing a conventional method for manufacturing an electric motor.
FIG. 8 is a plan view showing a part of a conventional electric motor.
FIG. 9 is a plan view showing a part of a conventional electric motor.
[Explanation of symbols]
2 slot, 2a slot bottom part, 3 magnetic pole piece part, 3a concave part, 3b convex part, 3c end face, 3d end face, 3e back yoke part, 3f tooth part, 3g protruding part, 4 first core member, 5 second core Member, 6 Winding, 7 Iron core, 8 Insulating member, 9 Joint part, 10, 11 Notch part.

Claims (4)

バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部が前記バックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、
前記磁極片部は内径側端部に内側に突出した突出部を有し、この突出部により環状に形成後に前記バックヨーク部と前記ティース部により構成されるスロット底部が曲線をなすように構成したことを特徴とする電動機固定子鉄心。A plurality of magnetic pole piece portions each having a back yoke portion and a teeth portion protruding from the back yoke portion are formed on the back yoke portion, via a joint portion constituted by a concave portion and a convex portion provided on the front and back surfaces. In an electric motor stator core that is connected in a foldable manner and is formed into an annular shape by bending the joint part of the connecting core after winding,
The pole piece has a protrusion protruding inwardly on the inner diameter side end portion, the slot bottom structure so as to form a curve formed constituted by the teeth and the back yoke portion after formation annularly by the projecting portion An electric motor stator core characterized by that. 前記ティース部に装着され、前記ティース部の壁面を覆うと共に前記バックヨーク部の突出部を覆う絶縁部材を備え、前記絶縁部材の前記バックヨーク側壁面と前記ティース部の壁面とが略９０°をなし、前記突出部を覆うように装着されることを特徴とする請求項１記載の電動機固定子鉄心。An insulating member is mounted on the tooth portion and covers the wall surface of the tooth portion and covers the protruding portion of the back yoke portion, and the back yoke side wall surface of the insulating member and the wall surface of the tooth portion are approximately 90 °. such to the motor stator core according to claim 1, characterized in that it is attached to cover the projecting portion. バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部が前記バックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、
前記バックヨークの外周の前記ジョイント部に対向する位置に軸方向に切欠き部を備え、前記切欠き部の周方向の長さを変えることにより、剛性を保ちつつ前記ジョイント部に発生する応力を最小限とどめ、且つ接触力を最小限にとどめ接触抵抗を上げることにより渦電流による効率低下を最小とすることを特徴とする電動機固定子鉄心。A plurality of magnetic pole piece portions each having a back yoke portion and a teeth portion protruding from the back yoke portion are formed on the back yoke portion via a joint portion constituted by a concave portion and a convex portion provided on the front and back surfaces. In an electric motor stator core that is connected in a foldable manner and is formed into an annular shape by bending the joint part of the connecting core after winding,
A stress is generated in the joint part while maintaining rigidity by providing a notch part in the axial direction at a position facing the joint part on the outer periphery of the back yoke, and changing the circumferential length of the notch part. An electric motor stator core characterized by minimizing a decrease in efficiency due to eddy currents by minimizing contact force and minimizing contact force . バックヨーク部と、このバックヨーク部から突出したティース部とを有する複数の磁極片部が前記バックヨーク部に形成される、表裏面に設けられた凹部及び凸部で構成されるジョイント部を介して折り曲げ可能に連結され、巻線後にこの連結鉄心のジョイント部を折り曲げることにより環状に形成される電動機固定子鉄心において、
前記バックヨークの外周の前記ティース部に対向する位置に軸方向に切欠き部を備え、電動機組立時の前記ジョイント部に加わる圧縮応力を最小限にとどめることを特徴とする電動機固定子鉄心。A plurality of magnetic pole piece portions each having a back yoke portion and a teeth portion protruding from the back yoke portion are formed on the back yoke portion, via a joint portion constituted by a concave portion and a convex portion provided on the front and back surfaces. In an electric motor stator core that is connected in a foldable manner and is formed into an annular shape by bending the joint part of the connecting core after winding,
An electric motor stator core comprising a notch portion in an axial direction at a position facing the teeth portion on an outer periphery of the back yoke, and minimizing a compressive stress applied to the joint portion during motor assembly .
JP2000042831A 2000-02-21 2000-02-21 Electric motor stator core Expired - Lifetime JP3607849B2 (en)

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Application Number Priority Date Filing Date Title
JP2000042831A JP3607849B2 (en) 2000-02-21 2000-02-21 Electric motor stator core
TW090103126A TW508891B (en) 2000-02-21 2001-02-13 Stator iron core of electric motor, manufacturing method thereof, electric motor, and compresor
US09/783,976 US20010030483A1 (en) 2000-02-21 2001-02-16 Stator iron core of electric motor, manufacturing method thereof, electric motor, and compressor
KR10-2001-0008315A KR100401083B1 (en) 2000-02-21 2001-02-20 Stator iron core of electric motor, manufacturing method thereof, electric motor, and compressor
CNB011028882A CN1162952C (en) 2000-02-21 2001-02-21 Motor stator-core and its producing method, and electric motor and compressor
US10/247,474 US6858964B2 (en) 2000-02-21 2002-09-20 Stator iron core of electric motor, manufacturing method thereof, electric motor, and compressor
US10/247,492 US6856064B2 (en) 2000-02-21 2002-09-20 Stator iron core of electric motor, manufacturing method thereof, electric motor, and compressor

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JP3607849B2 true JP3607849B2 (en) 2005-01-05

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