JP2021058035A - Stator and rotary electric machine - Google Patents

Stator and rotary electric machine Download PDF

Info

Publication number
JP2021058035A
JP2021058035A JP2019181112A JP2019181112A JP2021058035A JP 2021058035 A JP2021058035 A JP 2021058035A JP 2019181112 A JP2019181112 A JP 2019181112A JP 2019181112 A JP2019181112 A JP 2019181112A JP 2021058035 A JP2021058035 A JP 2021058035A
Authority
JP
Japan
Prior art keywords
stator
electric machine
rotary electric
magnetic
magnetic wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2019181112A
Other languages
Japanese (ja)
Other versions
JP2021058035A5 (en
Inventor
天池　将
Susumu Amaike
将 天池
雄也 平田
Yuya Hirata
雄也 平田
源三 岩城
Genzo Iwaki
源三 岩城
和雄 西濱
Kazuo Nishihama
和雄 西濱
敦 阿部
Atsushi Abe
敦 阿部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Industrial Equipment Systems Co Ltd
Original Assignee
Hitachi Industrial Equipment Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Industrial Equipment Systems Co Ltd filed Critical Hitachi Industrial Equipment Systems Co Ltd
Priority to JP2019181112A priority Critical patent/JP2021058035A/en
Priority to PCT/JP2020/030999 priority patent/WO2021065220A1/en
Priority to TW109128339A priority patent/TWI753539B/en
Publication of JP2021058035A publication Critical patent/JP2021058035A/en
Publication of JP2021058035A5 publication Critical patent/JP2021058035A5/ja
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

To provide a stator capable of easily reaching the desired value of the relative permeability of the magnetic wedge.SOLUTION: A stator 13 includes a magnetic wedge 17 in an opening 135 of multiple slots 132. The magnetic wedge 17 is formed of a mixture of soft magnetic material powder with an average particle size of 60 μm or less and a synthetic resin.SELECTED DRAWING: Figure 3

Description

本発明は、固定子及び回転電機に関する。 The present invention relates to a stator and a rotary electric machine.

ステータコアに備わるスロットがロータコアに対して開口する回転電機は、開口する部分（スロット開口部）でステータコアとロータコアの間隔が広がる。そのため、回転電機の起動時に、ステータコアとロータコアの間隔が変動することによる高調波磁束が発生し、回転電機に損失（高調波損失）を発生させている。この高調波損失を低減する目的で、ステータコアのスロット開口部に、軟磁性材料粉末と合成樹脂の混合体である磁性楔を設けた回転電機が特許文献１に開示されている。 In a rotary electric machine in which a slot provided in the stator core opens with respect to the rotor core, the distance between the stator core and the rotor core increases at the opening portion (slot opening). Therefore, when the rotary electric machine is started, a harmonic magnetic flux is generated due to the fluctuation of the distance between the stator core and the rotor core, causing a loss (harmonic loss) in the rotary electric machine. Patent Document 1 discloses a rotary electric machine in which a magnetic wedge, which is a mixture of soft magnetic material powder and synthetic resin, is provided at a slot opening of a stator core for the purpose of reducing this harmonic loss.

国際公開第２０１８／８７３８号International Publication No. 2018/8738

特許文献１は、磁性楔の密度と比透磁率の関係について、密度が増加するにつれて比透磁率も増加する単調増加の関係があることを開示している。 Patent Document 1 discloses that the relationship between the density of the magnetic wedge and the relative magnetic permeability has a monotonous increase in which the relative magnetic permeability increases as the density increases.

そこで、発明者は、比透磁率が所望の値となる磁性楔を作製するために当該所望の値から磁性楔の密度の目標値（計算密度）を演算し、磁性楔の密度を当該目標値とするために必要な鉄粉（軟磁性材料粉末）と合成樹脂の分量（体積）を両者の比重からそれぞれ演算し、演算した分量の鉄粉と合成樹脂を混合して磁性楔を作製した。ところが、作製された磁性楔の実際の密度は計算密度に比べて低く、比透磁率を所望の値に到達させることができなかった。 Therefore, the inventor calculates a target value (calculated density) of the density of the magnetic wedge from the desired value in order to produce a magnetic wedge having a specific magnetic permeability of the desired value, and sets the density of the magnetic wedge to the target value. The amount (volume) of iron powder (soft magnetic material powder) and synthetic resin required for the above was calculated from the specific densities of both, and the calculated amount of iron powder and synthetic resin were mixed to prepare a magnetic wedge. However, the actual density of the produced magnetic wedge was lower than the calculated density, and the relative magnetic permeability could not reach the desired value.

また、磁性楔の作製に際しては、磁性楔の密度を増加する目的で混合体に含まれる軟磁性材料粉末の割合を過剰に大きくすると、軟磁性材料粉末の増加に応じて混合体の流動性が低下する点に留意しなければならない。混合体の流動性が低下すると、スロット開口部に均一に充填することが困難となり、磁性楔の製作作業性が悪化するだけでなく、場合によっては磁性楔の製作が不可能となるおそれもあるからである。 Further, in the production of the magnetic wedge, if the proportion of the soft magnetic material powder contained in the mixture is excessively increased for the purpose of increasing the density of the magnetic wedge, the fluidity of the mixture increases as the amount of the soft magnetic material powder increases. It should be noted that it will decrease. When the fluidity of the mixture is reduced, it becomes difficult to uniformly fill the slot opening, which not only deteriorates the workability of manufacturing the magnetic wedge, but also may make it impossible to manufacture the magnetic wedge in some cases. Because.

本発明は上記事情に鑑みてなされたものであり、その目的は、磁性楔の比透磁率を所望の値に到達させることが容易な固定子を提供することである。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stator in which the relative magnetic permeability of a magnetic wedge can easily reach a desired value.

上記目的を達成するために、本発明は、複数のスロットの開口部に磁性楔を備える固定子であって、前記磁性楔は、平均粒径が６０μｍ以下の軟磁性材料粉末と、合成樹脂との混合体であることとする。 In order to achieve the above object, the present invention is a stator provided with magnetic wedges in the openings of a plurality of slots, wherein the magnetic wedges are made of a soft magnetic material powder having an average particle size of 60 μm or less, and a synthetic resin. It is assumed that it is a mixture of.

本発明によれば、磁性楔における軟磁性材料粉末の割合を過剰に大きくすることなく磁性楔の密度を容易に向上できるため、磁性楔の比透磁率を所望の値に到達させることが容易である。上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。 According to the present invention, the density of the magnetic wedge can be easily improved without excessively increasing the ratio of the soft magnetic material powder in the magnetic wedge, so that the relative magnetic permeability of the magnetic wedge can easily reach a desired value. is there. Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

本発明の第１実施形態に係る回転電機の断面図である。It is sectional drawing of the rotary electric machine which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る磁性楔を備える前の固定子の部分断面図である。It is a partial cross-sectional view of the stator before providing the magnetic wedge which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る磁性楔を備えた固定子の部分断面図である。It is a partial sectional view of the stator provided with the magnetic wedge which concerns on 1st Embodiment of this invention. 本発明の第１実施形態の実施例に係る磁性楔の鉄粉割合と密度の関係を鉄粉の平均粒径ごとに示し、計算密度と比較したグラフである。It is a graph which showed the relationship between the iron powder ratio and the density of the magnetic wedge which concerns on Example of 1st Embodiment of this invention for each average particle diameter of iron powder, and compared with the calculated density. 本発明の第２実施形態に係る磁性楔の断面図である。It is sectional drawing of the magnetic wedge which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る磁性楔の断面図である。It is sectional drawing of the magnetic wedge which concerns on 2nd Embodiment of this invention.

以下、図面を用いて、本発明の第１及び第２の実施形態による回転電機の構成及び動作について説明する。なお、各図において、同一符号は同一部分を示す。 Hereinafter, the configuration and operation of the rotary electric machine according to the first and second embodiments of the present invention will be described with reference to the drawings. In each figure, the same reference numerals indicate the same parts.

（第１実施形態）
図１は、本実施形態に係る回転電機の断面図である。回転電機１００は、回転軸（シャフト）１１に固定された回転子（ロータ）１２と、ロータ１２の外側に設置された固定子（ステータ）１３とを有する。 (First Embodiment)
FIG. 1 is a cross-sectional view of a rotary electric machine according to the present embodiment. The rotary electric machine 100 has a rotor (rotor) 12 fixed to a rotating shaft (shaft) 11 and a stator (stator) 13 installed outside the rotor 12.

ロータ１２は、所定の形状に打ち抜いた複数の電磁鋼板を積層した積層コアであるロータコア１２１と、ロータコア１２１のスロット内に挿入された二次導体１２２と、を有している。 The rotor 12 has a rotor core 121 which is a laminated core in which a plurality of electromagnetic steel sheets punched into a predetermined shape are laminated, and a secondary conductor 122 inserted into a slot of the rotor core 121.

ステータ１３は、所定の形状に打抜いた複数の電磁鋼板等の軟磁性薄板を積層した積層コアであるステータコア１３１と、ステータコア１３１のスロット１３２内に挿入されたコイル１３３とを有している。ステータコア１３１の内周は、エアギャップを介してロータ１２の外周と対向している。 The stator 13 has a stator core 131 which is a laminated core in which soft magnetic thin plates such as a plurality of electromagnetic steel plates punched into a predetermined shape are laminated, and a coil 133 inserted into a slot 132 of the stator core 131. The inner circumference of the stator core 131 faces the outer circumference of the rotor 12 via an air gap.

スロット１３２は、ステータコア１３１に備わる円環状のバックコア１３６からロータ１２に向かって径方向に延びる複数のティース（歯）１３４のうち隣合う２つのティース１３４の間に形成された溝である。スロット１３２のロータ１２側の端部は開口し、スロット開口部１３５が形成されている。 The slot 132 is a groove formed between two adjacent teeth 134 among a plurality of teeth 134 extending in the radial direction from the annular back core 136 provided in the stator core 131 toward the rotor 12. The end of the slot 132 on the rotor 12 side is open to form the slot opening 135.

図２は、本実施形態に係る磁性楔１７を備える前のステータ１３の部分断面図である。ステータ１３に形成されたスロット開口部１３５は、ティース１３４の端部から周方向に突出する突起部１３７により開口幅が狭められ、半閉型に形成されている（セミオープン・スロット型）。 FIG. 2 is a partial cross-sectional view of the stator 13 before the magnetic wedge 17 according to the present embodiment is provided. The slot opening 135 formed in the stator 13 is formed in a semi-closed shape by narrowing the opening width by a protrusion 137 protruding in the circumferential direction from the end of the teeth 134 (semi-open slot type).

スロット１３２内には、絶縁シート例えばＰＥＴ（ポリエチレンテレフタレート）シートにより形成されたスロットライナー１４、１５と、コイル１３３とが配置されている。スロットライナー１４はスロット１３２の内壁に貼り付けられたシートで、コイル１３３がスロット１３２の内壁に接触することを防ぎ、コイル１３３とステータコア１３１とを絶縁している。スロットライナー１５は磁性楔１７とコイル１３３を隔てるシートで、コイル１３３を覆うようにスロット１３２内に配置され、スロットライナー１５のロータ１２方向の外側にはスロット開口部１３５と空隙部１３７が形成されている。 In the slot 132, slot liners 14 and 15 formed of an insulating sheet such as a PET (polyethylene terephthalate) sheet and a coil 133 are arranged. The slot liner 14 is a sheet attached to the inner wall of the slot 132 to prevent the coil 133 from coming into contact with the inner wall of the slot 132 and to insulate the coil 133 from the stator core 131. The slot liner 15 is a sheet that separates the magnetic wedge 17 and the coil 133, and is arranged in the slot 132 so as to cover the coil 133. The slot opening 135 and the gap 137 are formed on the outside of the slot liner 15 in the rotor 12 direction. ing.

コイル１３３は、導線例えば銅やアルミ等にエナメル等の絶縁材が被覆された金属線で、スロットライナー１４、１５により囲まれ、ステータコア１３１と磁性楔１７に接触しないように配置されている。スロット１３２内に配置されたコイル１３３は結線されコイルエンド加工をされた後に、不飽和ポリエステル系ワニス等の固着ワニスにより、スロットライナー１４、１５とともにステータコア１３１に対して固着される。 The coil 133 is a metal wire in which an insulating material such as enamel is coated on a conducting wire such as copper or aluminum, is surrounded by slot liners 14 and 15, and is arranged so as not to come into contact with the stator core 131 and the magnetic wedge 17. After the coil 133 arranged in the slot 132 is connected and the coil end is processed, it is fixed to the stator core 131 together with the slot liners 14 and 15 by a fixing varnish such as an unsaturated polyester varnish.

図３は、本実施形態に係る磁性楔１７を備えた固定子１３の部分断面図である。磁性楔１７は、軟磁性材料粉末と合成樹脂を混錬した混合体を、スロット開口部１３５と空隙部１３７（図２参照）に充填して硬化させたものである。本実施形態では軟磁性材料粉末として鉄粉を利用している。 FIG. 3 is a partial cross-sectional view of the stator 13 provided with the magnetic wedge 17 according to the present embodiment. The magnetic wedge 17 is obtained by filling a slot opening 135 and a gap 137 (see FIG. 2) with a mixture obtained by kneading a soft magnetic material powder and a synthetic resin and hardening the mixture. In this embodiment, iron powder is used as the soft magnetic material powder.

軟磁性材料粉末の平均粒径は６０μｍ以下とする。これは、軟磁性材料粉末の平均粒径が大きいほど、磁性楔（混合体）における軟磁性材料粉末の割合が増加するにつれて磁性楔の密度が計算密度から乖離する度合いが大きくなる傾向があり、特に平均粒径が６０μｍを超える場合には、磁性楔の密度を増加する目的で混合体における軟磁性材料粉末の割合を増加すると、混合体の流動性が著しく低下してスロット開口部１３５と空隙部１３７に均一に充填することが困難となり、実用に耐え得る磁性楔（固定子）の作製が困難になるからである。 The average particle size of the soft magnetic material powder shall be 60 μm or less. This is because the larger the average particle size of the soft magnetic material powder, the greater the degree of deviation of the magnetic wedge density from the calculated density as the proportion of the soft magnetic material powder in the magnetic wedge (mixture) increases. Especially when the average particle size exceeds 60 μm, increasing the proportion of the soft magnetic material powder in the mixture for the purpose of increasing the density of the magnetic wedge significantly reduces the fluidity of the mixture, resulting in slot openings 135 and voids. This is because it becomes difficult to uniformly fill the portion 137, and it becomes difficult to manufacture a magnetic wedge (fixer) that can withstand practical use.

なお、磁性楔１７の作製に際し、スロット開口部１３５と空隙部１３７に混合体を均一に充填可能な流動性を確保するためには、軟磁性材料粉末と合成樹脂から成る混合体における軟磁性材料粉末の割合（鉄粉割合）を６０％以下とすることが好ましい。 When manufacturing the magnetic wedge 17, in order to ensure the fluidity that allows the mixture to be uniformly filled in the slot opening 135 and the void 137, the soft magnetic material in the mixture composed of the soft magnetic material powder and the synthetic resin is used. The powder ratio (iron powder ratio) is preferably 60% or less.

（実施例）
ＩＥＣ（国際電気標準会議：Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｅｌｅｃｔｒｏｔｅｃｈｎｉｃａｌ Ｃｏｍｍｉｓｓｉｏｎ）の国際高効率規格に規定されるＩＥ４に適合した回転電機１００を、磁性楔１７の比透磁率を高めることにより作製すべく試作を行った。 (Example)
A prototype was made to manufacture a rotary electric machine 100 conforming to IE4 specified in the international high efficiency standard of the IEC (International Electrotechnical Commission) by increasing the relative magnetic permeability of the magnetic wedge 17.

具体的には、国際高効率規格に規定されるＩＥ３に適合した回転電機１００の固定子１３に、軟磁性材料粉末の粒径と鉄粉割合を変えた磁性楔１７を装着し、効率を測定した。また、軟磁性材料粉末には、水アトマイズ法により作製された平均粒径が７５μｍと６０μｍの鉄粉を用い、合成樹脂はエポキシ樹脂を用いた。 Specifically, a magnetic wedge 17 in which the particle size of the soft magnetic material powder and the iron powder ratio are changed is attached to the stator 13 of the rotary electric machine 100 conforming to IE3 specified in the international high efficiency standard, and the efficiency is measured. did. Further, as the soft magnetic material powder, iron powder having an average particle size of 75 μm and 60 μm produced by the water atomization method was used, and an epoxy resin was used as the synthetic resin.

図４は、本実施例に係る磁性楔１７の鉄粉割合と密度の関係を鉄粉の平均粒径ごとに示し、エポキシ樹脂と鉄粉の混合比率から計算した密度（計算密度）と比較したグラフである。 FIG. 4 shows the relationship between the iron powder ratio and the density of the magnetic wedge 17 according to this embodiment for each average particle size of the iron powder, and compares it with the density (calculated density) calculated from the mixing ratio of the epoxy resin and the iron powder. It is a graph.

最初に、平均粒径が７５μｍの鉄粉により形成された磁性楔１７を備える回転電機１００について、ＩＥ４に適合させるべく磁性楔１７の鉄粉割合を増加させた。そうしたところ、回転電機１００がＩＥ４に適合する効率になる前に混合体は流動性が低下し、スロット開口部１３５と空隙部１３７に混合体を均一に充填することが困難となった。そのため、平均粒径が７５μｍの鉄粉により形成された磁性楔１７を備える回転電機１００はＩＥ４に適合できなかった。 First, for the rotary electric machine 100 having the magnetic wedge 17 formed of iron powder having an average particle size of 75 μm, the iron powder ratio of the magnetic wedge 17 was increased in order to conform to IE4. As a result, the fluidity of the mixture decreased before the rotary electric machine 100 became efficient to conform to IE4, and it became difficult to uniformly fill the slot opening 135 and the gap 137 with the mixture. Therefore, the rotary electric machine 100 provided with the magnetic wedge 17 formed of iron powder having an average particle size of 75 μm could not conform to IE4.

一方、平均粒径が６０μｍの鉄粉により形成された磁性楔１７を備える回転電機１００について、ＩＥ４に適合させるべく磁性楔１７における鉄粉割合を増加させた。混合体の鉄粉割合を５８％としたところ、従前の固定子ではＩＥ３だった回転電機１００の効率をＩＥ４に適合させることができた。そのときの磁性楔１７の密度は４．９×１０−６ｋｇ／ｍｍ３であった（図４参照）。このことから、少なくとも本実施例で使用した回転電気１００の仕様では、軟磁性材料粉末の平均粒径を６０μｍ以下とし、混合体における軟磁性材料粉末の割合を５８％以上とした磁性楔１７を作製すれば、回転電気の効率をＩＥ４に適合できることが判った。 On the other hand, with respect to the rotary electric machine 100 provided with the magnetic wedge 17 formed of iron powder having an average particle size of 60 μm, the ratio of iron powder in the magnetic wedge 17 was increased in order to conform to IE4. When the iron powder ratio of the mixture was set to 58%, the efficiency of the rotary electric machine 100, which was IE3 in the conventional stator, could be adapted to IE4. The density of the magnetic wedge 17 at that time was 4.9 × 10-6 kg / mm 3 (see FIG. 4). From this, at least in the specifications of the rotating electricity 100 used in this embodiment, the magnetic wedge 17 has an average particle size of the soft magnetic material powder of 60 μm or less and a ratio of the soft magnetic material powder in the mixture of 58% or more. It was found that if made, the efficiency of rotating electricity could be adapted to IE4.

また、図４に示すように、磁性楔１７の密度は、鉄粉の平均粒径によらず、鉄粉割合が大きくなると計算密度から乖離する傾向があり、鉄粉割合の増加に対する密度の上昇が計算密度より低い。一方、鉄粉割合が同じ場合の磁性楔１７の密度は、平均粒径が７５μｍの場合より６０μｍの場合の方が大きく、磁性楔１７を形成する軟磁性材料粉末の平均粒径を小さくすることにより、磁性楔１７の密度を大きくすることができる。 Further, as shown in FIG. 4, the density of the magnetic wedge 17 tends to deviate from the calculated density as the iron powder ratio increases, regardless of the average particle size of the iron powder, and the density increases with respect to the increase in the iron powder ratio. Is lower than the calculated density. On the other hand, the density of the magnetic wedge 17 when the iron powder ratio is the same is larger when the average particle size is 60 μm than when the average particle size is 75 μm, and the average particle size of the soft magnetic material powder forming the magnetic wedge 17 should be reduced. Therefore, the density of the magnetic wedge 17 can be increased.

したがって、本実施形態に係る固定子１３は、磁性楔１７を備え、磁性楔１７は、平均粒径が６０μｍ以下の軟磁性材料粉末と、合成樹脂との混合体である。このことにより、固定子１３に密度の大きい磁性楔を容易に形成することができ、磁性楔の比透磁率を所望の値に到達させることが容易である。 Therefore, the stator 13 according to the present embodiment includes a magnetic wedge 17, and the magnetic wedge 17 is a mixture of a soft magnetic material powder having an average particle size of 60 μm or less and a synthetic resin. As a result, a magnetic wedge having a high density can be easily formed on the stator 13, and it is easy to bring the relative magnetic permeability of the magnetic wedge to a desired value.

また、本実施形態に係る回転電機１００は、磁性楔１７を備え、磁性楔１７は、混合体における軟磁性材料粉末の割合が６０％以下である。このことにより、磁性楔１７の作製に際し、スロット開口部１３５と空隙部１３７に混合体を均一に充填可能な流動性を確保することができる。 Further, the rotary electric machine 100 according to the present embodiment includes a magnetic wedge 17, and the magnetic wedge 17 has a soft magnetic material powder ratio of 60% or less in the mixture. As a result, when the magnetic wedge 17 is manufactured, it is possible to secure the fluidity that allows the mixture to be uniformly filled in the slot opening 135 and the gap 137.

また、本実施形態に係る回転電機１００は、磁性楔１７を備え、磁性楔１７は、混合体における軟磁性材料粉末の割合が５８％以上である。このことにより、ＩＥ４に適合する回転電機１００を作製することができる。 Further, the rotary electric machine 100 according to the present embodiment includes a magnetic wedge 17, and the magnetic wedge 17 has a soft magnetic material powder ratio of 58% or more in the mixture. This makes it possible to manufacture a rotary electric machine 100 that conforms to IE4.

（第２実施形態）
図５と図６は、第２実施形態に係る磁性楔の断面図である。本実施形態に係る磁性楔が第１実施形態と異なる点は、固定子１３の中心軸に対して周方向に軟磁性材料粉末（鉄粉）の含有量の異なる部分が磁性楔１７に配列されている点である。なお、回転電機１００の断面は図１と同じため省略し、第１実施形態と重複する部品、構成等に関しては原則として説明を割愛する。 (Second Embodiment)
5 and 6 are cross-sectional views of the magnetic wedge according to the second embodiment. The difference between the magnetic wedge according to the present embodiment and the first embodiment is that portions having different contents of the soft magnetic material powder (iron powder) in the circumferential direction with respect to the central axis of the stator 13 are arranged on the magnetic wedge 17. It is a point. Since the cross section of the rotary electric machine 100 is the same as that in FIG. 1, the cross section is omitted, and the description of parts, configurations, etc. that overlap with the first embodiment is omitted in principle.

図５に示す磁性楔１７は、１つの第１部分１７１と２つの第２部分１７２が固定子１３の中心軸に対して周方向に配列され、１つの第１部分１７１は、２つの第２部分１７２より鉄粉の含有量が少なく、２つの第２部分１７２により挟まれている。 In the magnetic wedge 17 shown in FIG. 5, one first portion 171 and two second portions 172 are arranged in the circumferential direction with respect to the central axis of the stator 13, and one first portion 171 has two second portions. It contains less iron powder than portion 172 and is sandwiched between two second portions 172.

また、図６に示す磁性楔１７は、２つの第１部分１７１と３つの第２部分１７２が固定子１３の中心軸に対して周方向に配列され、２つの第１部分１７１は、３つの第２部分１７２より鉄粉の含有量が少なく、３つの第２部分１７２の２つにより挟まれている。 Further, in the magnetic wedge 17 shown in FIG. 6, two first portions 171 and three second portions 172 are arranged in the circumferential direction with respect to the central axis of the stator 13, and the two first portions 171 have three. The iron powder content is lower than that of the second portion 172, and it is sandwiched between two of the three second portions 172.

即ち、本実施形態に係る固定子１３（回転電機１００）は、磁性楔１７を備え、磁性楔１７は、少なくとも１つの第１部分１７１と複数の第２部分１７２が固定子１３の中心軸（回転電機１００の回転軸）に対して周方向に配列され、少なくとも１つの第１部分１７１は、複数の第２部分１７２より軟磁性材料粉末の含有量が少なく、複数の第２部分１７２の２つにより挟まれている。 That is, the stator 13 (rotary electric machine 100) according to the present embodiment includes a magnetic wedge 17, and the magnetic wedge 17 has at least one first portion 171 and a plurality of second portions 172 as the central axis of the stator 13. Arranged in the circumferential direction with respect to the rotation axis of the rotary electric machine 100), at least one first portion 171 has a lower content of soft magnetic material powder than the plurality of second portions 172, and the plurality of second portions 172-2. It is sandwiched between two magnets.

第１部分１７１は第２部分１７２より鉄粉の含有量が少ない。そのため、第１部分１７１は第２部分１７２より比透磁率が低く、固定子１３の中心軸（または回転電機１００の回転軸１１）に対して周方向に第２部分１７２を通過した磁束は第１部分１７１を通過するときに弱められる。一方、固定子１３の中心軸（または回転電機１００の回転軸１１）に対して半径方向に第２部分１７２を通過する磁束は、第１部分１７１を通過せず弱められない。したがって、磁性楔１７を流れる磁束は周方向に比べて半径方向に流れやすい。これらのことより、本実施形態に係る磁性楔１７は、磁束を固定子１３の中心軸（または回転電機１００の回転軸１１）に対して半径方向である回転子１２の方向に流し、コイル１３３に発生する励磁電流を減少させることができる。 The first portion 171 has a lower iron powder content than the second portion 172. Therefore, the first portion 171 has a lower relative magnetic permeability than the second portion 172, and the magnetic flux that has passed through the second portion 172 in the circumferential direction with respect to the central axis of the stator 13 (or the rotating shaft 11 of the rotary electric machine 100) is the first. It is weakened as it passes through one part 171. On the other hand, the magnetic flux passing through the second portion 172 in the radial direction with respect to the central axis of the stator 13 (or the rotating shaft 11 of the rotary electric machine 100) does not pass through the first portion 171 and cannot be weakened. Therefore, the magnetic flux flowing through the magnetic wedge 17 tends to flow in the radial direction as compared with the circumferential direction. Based on these facts, the magnetic wedge 17 according to the present embodiment causes the magnetic flux to flow in the direction of the rotor 12 which is the radial direction with respect to the central axis of the stator 13 (or the rotating shaft 11 of the rotary electric machine 100), and the coil 133. The exciting current generated in can be reduced.

なお、本発明は上記した実施形態に限定されるものではなく、様々な変形例が含まれる。例えば、上述した実施形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることが可能であり、また、ある実施形態の構成に他の実施形態の構成を加えることも可能である。また、各実施形態の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

なお、本発明の実施形態は、以下の態様であってもよい。 The embodiment of the present invention may have the following aspects.

本発明に用いられる軟磁性材料粉末は生産性に優れたアトマイズ鉄粉を用いすることが好ましく、特に製造コストが低い水アトマイズ鉄粉を用いることが好ましい。 As the soft magnetic material powder used in the present invention, it is preferable to use atomized iron powder having excellent productivity, and it is particularly preferable to use water atomized iron powder having a low production cost.

また、軟磁性材料粉末の平均粒径は、軟磁性材料粉末の表面の凹凸を滑らかにすることにより小さくすることが望ましい。 Further, it is desirable that the average particle size of the soft magnetic material powder is reduced by smoothing the irregularities on the surface of the soft magnetic material powder.

１１…回転軸（シャフト）、１２…回転子（ロータ）、１３…固定子（ステータ）、１４，１５…スロットライナー、１７…磁性楔、１００…回転電機、１３１…ステータコア、１３２…スロット、１３５…スロット開口部、１７１…第１部分、１７２…第２部分 11 ... Rotating shaft (shaft), 12 ... Rotor (rotor), 13 ... Stator (stator), 14, 15 ... Slot liner, 17 ... Magnetic wedge, 100 ... Rotating machine, 131 ... Stator core, 132 ... Slot, 135 ... slot opening, 171 ... first part, 172 ... second part

Claims (12)

複数のスロットの開口部に磁性楔を備える固定子であって、
前記磁性楔は、平均粒径が６０μｍ以下の軟磁性材料粉末と、合成樹脂との混合体であることを特徴とする固定子。 A stator with magnetic wedges in the openings of multiple slots.
The magnetic wedge is a stator characterized by being a mixture of a soft magnetic material powder having an average particle size of 60 μm or less and a synthetic resin. 請求項１記載の固定子であって、
前記磁性楔は、前記混合体における前記軟磁性材料粉末の割合が６０％以下であることを特徴とする固定子。 The stator according to claim 1,
The magnetic wedge is a stator characterized in that the ratio of the soft magnetic material powder in the mixture is 60% or less. 請求項１記載の固定子であって、
前記磁性楔は、前記混合体における前記軟磁性材料粉末の割合が５８％以上であることを特徴とする固定子。 The stator according to claim 1,
The magnetic wedge is a stator characterized in that the ratio of the soft magnetic material powder in the mixture is 58% or more. 請求項１記載の固定子であって、
前記磁性楔には、少なくとも１つの第１部分と複数の第２部分が前記固定子の中心軸に対して周方向に配列され、
前記少なくとも１つの第１部分は、前記複数の第２部分より前記軟磁性材料粉末の含有量が少なく、前記複数の第２部分の２つにより挟まれていることを特徴とする固定子。 The stator according to claim 1,
In the magnetic wedge, at least one first portion and a plurality of second portions are arranged in the circumferential direction with respect to the central axis of the stator.
The stator characterized in that the at least one first portion has a lower content of the soft magnetic material powder than the plurality of second portions and is sandwiched between the two of the plurality of second portions. 請求項４記載の固定子であって、
前記磁性楔が１つの前記第１部分と２つの前記第２部分を備えることを特徴とする固定子。 The stator according to claim 4,
A stator characterized in that the magnetic wedge comprises one said first portion and two said second portions. 請求項４記載の固定子であって、
前記磁性楔が２つの前記第１部分と３つの前記第２部分を備えることを特徴とする固定子。 The stator according to claim 4,
A stator characterized in that the magnetic wedge comprises two said first portions and three said second portions. 複数のスロットの開口部に磁性楔を備える回転電機であって、
前記磁性楔は、平均粒径が６０μｍ以下の軟磁性材料粉末と、合成樹脂との混合体であることを特徴とする回転電機。 A rotary electric machine equipped with magnetic wedges at the openings of multiple slots.
The magnetic wedge is a rotary electric machine characterized by being a mixture of a soft magnetic material powder having an average particle diameter of 60 μm or less and a synthetic resin. 請求項７記載の回転電機であって、
前記磁性楔は、前記軟磁性材料粉末の前記合成樹脂に対する割合が６０％以下の混合体であることを特徴とする回転電機。 The rotary electric machine according to claim 7.
The magnetic wedge is a rotary electric machine characterized in that the ratio of the soft magnetic material powder to the synthetic resin is 60% or less. 請求項７記載の回転電機であって、
前記磁性楔は、前記軟磁性材料粉末の前記合成樹脂に対する割合が５８％以上の混合体であることを特徴とする回転電機。 The rotary electric machine according to claim 7.
The magnetic wedge is a rotary electric machine characterized in that the ratio of the soft magnetic material powder to the synthetic resin is 58% or more. 請求項７記載の回転電機であって、
前記磁性楔には、少なくとも１つの第１部分と複数の第２部分が前記回転電機の回転軸に対して周方向に配列され、
前記少なくとも１つの第１部分は、前記複数の第２部分より前記軟磁性材料粉末の含有量が少なく、前記複数の第２部分の２つにより挟まれていることを特徴とする回転電機。 The rotary electric machine according to claim 7.
In the magnetic wedge, at least one first portion and a plurality of second portions are arranged in the circumferential direction with respect to the rotation axis of the rotary electric machine.
The rotary electric machine is characterized in that the at least one first portion has a lower content of the soft magnetic material powder than the plurality of second portions and is sandwiched between the two of the plurality of second portions. 請求項１０記載の回転電機であって、
前記磁性楔が１つの前記第１部分と２つの前記第２部分を備えることを特徴とする回転電機。 The rotary electric machine according to claim 10.
A rotary electric machine, wherein the magnetic wedge includes one first portion and two second portions. 請求項１０記載の回転電機であって、
前記磁性楔が２つの前記第１部分と３つの前記第２部分を備えることを特徴とする回転電機。 The rotary electric machine according to claim 10.
A rotary electric machine characterized in that the magnetic wedge includes two said first portions and three said second portions.
JP2019181112A 2019-10-01 2019-10-01 Stator and rotary electric machine Pending JP2021058035A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2019181112A JP2021058035A (en) 2019-10-01 2019-10-01 Stator and rotary electric machine
PCT/JP2020/030999 WO2021065220A1 (en) 2019-10-01 2020-08-17 Stator and rotary electric machine
TW109128339A TWI753539B (en) 2019-10-01 2020-08-20 Stator and rotating electrical machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019181112A JP2021058035A (en) 2019-10-01 2019-10-01 Stator and rotary electric machine

Publications (2)

Publication Number Publication Date
JP2021058035A true JP2021058035A (en) 2021-04-08
JP2021058035A5 JP2021058035A5 (en) 2021-10-14

Family

ID=75271365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019181112A Pending JP2021058035A (en) 2019-10-01 2019-10-01 Stator and rotary electric machine

Country Status (3)

Country Link
JP (1) JP2021058035A (en)
TW (1) TWI753539B (en)
WO (1) WO2021065220A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5098699A (en) * 1973-12-29 1975-08-05
JPS6110937A (en) * 1984-06-26 1986-01-18 Toshiba Corp Magnetic wedge
JPS6110935A (en) * 1984-06-26 1986-01-18 Toshiba Corp Magnetic wedge
JP2002281709A (en) * 2001-03-23 2002-09-27 Mitsubishi Electric Corp Magnetic wedge for dynamo-electric machine and manufacture therefor
DE102005004566A1 (en) * 2005-02-01 2006-08-10 Robert Bosch Gmbh Slot wedge for a stator or a rotor of an electric machine
US20130057105A1 (en) * 2011-09-02 2013-03-07 Dean James Patterson Permanent magnet motors and methods of assembling the same
CN106416022A (en) * 2014-06-05 2017-02-15 爱信艾达株式会社 Stator assembly method and stator assembly device
CN109417327A (en) * 2016-07-08 2019-03-01 株式会社日立产机*** The manufacturing method of rotating electric machine and rotating electric machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5098699A (en) * 1973-12-29 1975-08-05
JPS6110937A (en) * 1984-06-26 1986-01-18 Toshiba Corp Magnetic wedge
JPS6110935A (en) * 1984-06-26 1986-01-18 Toshiba Corp Magnetic wedge
JP2002281709A (en) * 2001-03-23 2002-09-27 Mitsubishi Electric Corp Magnetic wedge for dynamo-electric machine and manufacture therefor
DE102005004566A1 (en) * 2005-02-01 2006-08-10 Robert Bosch Gmbh Slot wedge for a stator or a rotor of an electric machine
US20130057105A1 (en) * 2011-09-02 2013-03-07 Dean James Patterson Permanent magnet motors and methods of assembling the same
CN106416022A (en) * 2014-06-05 2017-02-15 爱信艾达株式会社 Stator assembly method and stator assembly device
CN109417327A (en) * 2016-07-08 2019-03-01 株式会社日立产机*** The manufacturing method of rotating electric machine and rotating electric machine

Also Published As

Publication number Publication date
TW202115991A (en) 2021-04-16
TWI753539B (en) 2022-01-21
WO2021065220A1 (en) 2021-04-08

Similar Documents

Publication Publication Date Title
US9287742B2 (en) Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof
KR101120352B1 (en) Dynamoelectric machine stator core with mini caps
US7221073B2 (en) Axial gap electronic motor
JP2011182637A (en) Stator for energy converting apparatus, manufacturing method of the same, energy converting apparatus, and wind turbine
TWI536712B (en) Axial air gap type rotary motor
CN110741533B (en) Rotating electrical machine
JP2010130842A (en) Stator core and stator core with coil
US20090183357A1 (en) Magnetic powder metal composite core for electrical machines
EP1836759A1 (en) Reduction of harmonics in an electric motor
CN104620474B (en) The stator of electric rotating machine
US3495114A (en) Cylindrical and disc stators for electrical machines having composite windings
CN108028564A (en) The manufacture method of rotor, the electric rotating machine for being equipped with rotor and rotor
US20070114870A1 (en) Induction motor capable of utilizing magnetic fluxes of end-turns of a stator to increase torque of a rotor
US20120256511A1 (en) Stator
EP3267561A1 (en) Axial gap type rotating electric machine and stator
WO2021065220A1 (en) Stator and rotary electric machine
US11722019B2 (en) Stator assembly with heat recovery for electric machines
EP4084299A1 (en) Coil, stator comprising same, and motor
JP6496229B2 (en) Rotating electric machine
US11223246B2 (en) Stator
GB2542107A (en) Winding former
JP2013258822A (en) Manufacturing method of stator and stator
JP2018133850A (en) Rotary electric machine
JP5264210B2 (en) Rotating electric machine stator
JP6739638B2 (en) Rotor of rotating electric machine and rotating electric machine

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210831

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210831

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220920

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20221020

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20230307