JP2004088955A - Three-phase magnetic generator - Google Patents

Three-phase magnetic generator Download PDF

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Publication number
JP2004088955A
JP2004088955A JP2002249076A JP2002249076A JP2004088955A JP 2004088955 A JP2004088955 A JP 2004088955A JP 2002249076 A JP2002249076 A JP 2002249076A JP 2002249076 A JP2002249076 A JP 2002249076A JP 2004088955 A JP2004088955 A JP 2004088955A
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Japan
Prior art keywords
poles
rotor
coil
stator
wound
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JP2002249076A
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Japanese (ja)
Inventor
Kentaro Kanemitsu
金光 憲太郎
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DensoTrim Corp
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DensoTrim Corp
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Application filed by DensoTrim Corp filed Critical DensoTrim Corp
Priority to JP2002249076A priority Critical patent/JP2004088955A/en
Publication of JP2004088955A publication Critical patent/JP2004088955A/en
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  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the drop of output, the demagnetization of a magnet, and the shortening of the life of a coil caused by temperature rise by suppressing the temperature rise caused by an eddy current accompanying the increase of the number of poles of a rotor. <P>SOLUTION: A three-phase magnetic generator has a stator 200 of 3n(n:an optional natural number) in the number of poles where a coil 23 is wound, and a rotor 100 of 4n in the number of poles where a permanent magnet 13 is fixed. The flange 24a of a magnetic substance sheet member 24 where the coil 23 is wound in condition that the stack 21 of the stator 200 is caught is eliminated. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、オートバイ(自動二輪車)などに搭載され、バッテリを充電するとともに前照灯など電気負荷に電力を供給する三相磁石式発電機に関する。
【0002】
【従来ないし前提技術】
近年、オートバイ用の三相磁石式発電機には、小型化が要求されると同時に、電気負荷の増加に伴う低回転側での出力電流の増大が要求されている。
【0003】
しかし、コイルの巻線スペースの縮小化に伴い大径のコイルを用いることができず、また、低回転側での出力電流の増大に伴い高回転側での出力電流も増大することになり、このため、従来の三相磁石式発電機つまり回転子の極数2n、固定子の極数3n(n:任意の自然数)の三相磁石式発電機では、高回転側の出力電流を抑えることができず、コイル温度が高くなるという問題があった。
【0004】
そこで、特開2001−112226には、回転子の極数を16極、固定子の極数を18極とした三相磁石式発電機が開示されている。この三相磁石式発電機によると、回転子の極数が従来の12極から16極に増えたことにより周波数が高くなって電圧が高くなり、低回転側の出力電流が増大するとともに、1極当たりの磁石が小さくなって高回転側の出力電流が減少するため、コイル温度を低下させることができるという効果を奏する。また、特願2002−156919には、固定子の極数を3n(n:任意の自然数)、回転子の極数を4nにしたことを特徴とする三相磁石式発電機が記載されている。この三相磁石式発電機によると、安価で、しかも、低回転側の出力電流の増大により充電性能を向上させるとともに高回転側の出力電流の減少によりコイル温度を低下させることができるという効果を奏する。
【0005】
【発明が解決しようとする課題】
しかしながら、特願2002−156919においては、図10に示すように、固定子200の積層コア21を挟んだ状態でコイル23が巻き付けられる磁性体シート部材24の鍔部24aが漏れ磁束ループAを形成し、回転子100の極数の増加に伴う渦電流による温度上昇を招き、この温度上昇により、出力の低下、最悪の場合磁石13の減磁を招き、さらに、コイル23の銅線寿命を短縮させるおそれがあることが判明した。
【0006】
本発明は、上記のような前提技術の問題点を解決し、回転子の極数を増加させたことに伴う温度上昇を抑制し、出力の向上、コイルの長寿命化などを図ることができる三相磁石式発電機を提供することを目的とする。
【0007】
【課題を解決するための手段】
請求項1に係る三相磁石式発電機は、コイルが巻かれた極数3n(n:任意の自然数)の固定子と、永久磁石が固定された極数2n+m(m:任意の自然数)の回転子とを有し、かつ、前記固定子の積層コアを挟んだ状態で前記コイルが巻き付けられる磁性体シート部材の鍔部を削除して構成されることを特徴とする。
【0008】
請求項1に係る三相磁石式発電機によると、磁性体シート部材の鍔部を削除したため、鍔部を通る漏れ磁束ループが形成されなくなり、このため、渦電流による温度上昇を抑制することができる。
【0009】
請求項2に係る三相磁石式発電機は、コイルが巻かれた極数3n(n:任意の自然数)の固定子と、永久磁石が固定された極数2n+m(m:任意の自然数)の回転子とを有し、かつ、前記固定子の積層コアを挟んだ状態で前記コイルが巻き付けられる磁性体シート部材を削除して構成されることを特徴とする。
【0010】
請求項2に係る三相磁石式発電機によると、磁性体シート部材を削除したため、鍔部を通る漏れ磁束ループが形成されなくなり、このため、渦電流による温度上昇を抑制することができる。
【0011】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
【0012】
図1は、一実施形態に係る三相磁石式発電機の断面図、図2は、図1図示II−II線による断面図、図3は、固定子のコイル結線図、図4は、出力電圧のベクトル図、図5は、外部特性グラフ、図6は、出力電流グラフ、図7は、本実施形態の比較例としての従来一般的な三相磁石式発電機の断面図、図8は、同比較例の固定子のコイル結線図、図9は、同比較例の出力電圧のベクトル図をそれぞれ示す。
【0013】
図1及び図2において、本実施形態に係る三相磁石式発電機は、回転子100と固定子200とにより構成される。
【0014】
回転子100は、磁性体からなるロータ11を備える。ロータ11は、熱間鍛造後切削により仕上げ加工されてなる。ロータ11の中央のボス部11aの内側には、図示しないエンジンのクランクシャフトに嵌合されるテーパ部11bが形成されている。その他、ボス部11aには、図示しないナット等を用いてロータ11をクランクシャフトに締め付け固定させたときの締め付け座面となる端面11c、及び、ロータ11をクランクシャフトから外す際に利用される抜きねじ部11dが形成されている。ロータ11の端面部11eには、冷却用の窓穴11fが複数個設けられている。ロータ11の円筒状の外周部11gはヨークを構成している。ロータ外周部11gの内側に、非磁性体からなるリング状のスペーサ12、円周方向に等間隔に配置された複数個の永久磁石13、及び、ロータ外周部11gに圧入された非磁性体からなるリング状の位置決めケース14が、クランクシャフトの軸方向に沿って順に配設されている。複数個の永久磁石13は、位置決めケース14に形成された凸部14aによって円周方向に等間隔となるよう位置決めされるとともに、永久磁石13の内側に磁石保護リング15を圧入しロータ外周部11gの先端11hを巻きかしめすることによってロータ11に固定されている。なお、磁石保護リング15は、ステンレス板をプレス加工して形成されている。
【0015】
固定子200は回転子100の内側に配設されている。固定子200は積層コア21を備える。積層コア21は、鉄板をプレス加工したものを複数枚積層して構成される。積層コア21は、磁性体シート部材24で挟まれ、リベット22をかしめることによって一体化されている。積層コア21の表面はエポキシ樹脂等で絶縁されている。磁性体シート部材24には巻線用銅線が巻き付けられ、発電コイル23が形成されている。固定子200は、積層コア21及び磁性体シート部材24に形成されたねじ締め穴21aに図示しない取付ボルトをねじ込むことによって図示しないエンジンケースに固定される。
【0016】
磁性体シート部材24は、図10に示した磁性体シート部材24から鍔部24aを削除して構成される。このため、鍔部24aを通る漏れ磁束ループAが形成されなくなり、このため、渦電流による温度上昇を抑制することができる。
【0017】
次に、図2〜図4に基づき、本実施形態に係る三相磁石式発電機の固定子200の極数、コイル結線方法及び回転子100の極数並びに固定子200の出力電圧について、従来一般的な三相磁石式発電機(図7〜図9)と比較しながら説明する。
【0018】
本実施形態における固定子200の極数は、3n(n:任意の自然数)である。これに対し、従来一般的な三相磁石式発電機の固定子200の極数も3nである。したがって、n=4の場合、図2及び図7を参照すれば明らかなように、本実施形態の固定子200の極数は、従来の固定子200の極数と同じ12となる。
【0019】
また、本実施形態における固定子200のコイル23の結線方法は、図3に示す通りであり、図8に示した従来の固定子200のコイル23の結線方法と同じであり、すべての極において巻線方向は同一であり、また、2極飛びで渡り線が配線される。したがって、渡り線は2極分の長さで済むため、従来技術(特開2001−112226)と比べ長い渡り線を必要としなくなり、また、従来技術(特開2001−112226)と比べコイルの引き出し整形が容易になる。
【0020】
一方、本実施形態における回転子100の極数は、4n(n:任意の自然数)である。これに対し、従来一般的な三相磁石式発電機の回転子100の極数は2nである。したがって、n=4の場合、図2及び図7を参照すれば明らかなように、従来の回転子100の極数は8であるのに対し、本実施形態における回転子100の極数は16となる。
【0021】
したがって、n=4の場合、図2及び図7に示すように、従来の固定子200の機械角は30°、電気角は120°であるのに対し、本実施形態における固定子200の機械角は30°、電気角は240°となり、また、従来の回転子100の機械角は45°、電気角は180°であるのに対し、本実施形態における回転子100の機械角は22.5°、電気角は180°となる。このため、図4及び図9を参照すれば明らかなように、本実施形態における固定子200の出力電圧は、従来の固定子200の出力電圧に対し、相の順序は逆になるものの相間位相差は120°となり同一相内での位相差は発生しない。したがって、位相差に起因する出力電圧の損失は発生せず、従来技術(特開2001−112226)のように損失を補うために永久磁石を大型化する必要が無くなる。
【0022】
次に、本実施形態による三相磁石式発電機(図1〜図4)の外部特性と従来一般的な三相磁石式発電機(図7〜図9)の外部特性とを比較すると、図5に実験結果として示すように、本実施形態による三相磁石式発電機の場合、従来一般的な三相磁石式発電機と比べ、低回転(1000rpm)から高回転(5000rpm)にわたり電流が減少するとともに電圧が増大する。このような実験結果は、電流については、1極当たりの永久磁石13を小さくしたことから電流は減少し、また、電圧については、永久磁石13の小型化により電圧は減少するが、回転子100の極数を2倍にしたことから周波数が2倍となり、その結果電圧は増大したと考察される。
【0023】
また、電圧Vを一定として出力電流を測定すると、図6に示すように、低回転(1000rpm)では、本実施形態による出力電流が従来技術による出力電流よりも大きくなり、その結果バッテリへの充電電流が増大する。一方、高回転(5000rpm)では、本実施形態による出力電流が従来技術による出力電流よりも小さくなり、その結果コイル温度は大幅に低下する。
【0024】
次に、上述した如き実施形態に係る三相磁石式発電機(発明発電機)と図10図示の三相磁石式発電機(前提発電機)に対する実験結果を述べる。実験は、コア表面(磁性体シート部材24)に熱電対を貼るとともにコイル23の中間層に熱電対を挿入し、6000rpm一定で5分間運転した後に温度を測定するようにして行なった。その結果、前提発電機では、コア表面温度が156℃、コイル温度が163℃と推定された(熱減磁が発生したため推定値である)のに対し、発明発電機では、コア表面温度が103℃、コイル温度が125℃と測定され、温度上昇抑制効果が証明された。
【0025】
以上説明したように、本実施形態に係る三相磁石式発電機は、コイル23が巻かれた極数3n(n:任意の自然数)の固定子200と、永久磁石13が固定された極数4nの回転子100とを有し、かつ、固定子200の積層コア21を挟んだ状態でコイル23が巻き付けられる磁性体シート部材24の鍔部24aを削除して構成される。このため、鍔部24aを通る漏れ磁束ループAが形成されなくなり、回転子100の極数の増加に伴う渦電流による温度上昇を抑制でき、温度上昇による出力の低下、磁石13の減磁、コイル23の寿命短縮を防止することができる。また、鍔部24aを削除したことに伴い、磁性体シート部材の形状が簡素になりコスト低減を図ることができる。なお、本実施形態は、極数4nの回転子100に限定されるものではなく、従来の極数2nよりも多い2n+m(m:任意の自然数)の回転子100を有する三相磁石式発電機に広く適用可能である。
【0026】
本発明の他の実施形態としては、図示を省略したが、磁性体シート部材24を削除したものを挙げることができる。この実施形態によっても、鍔部24aを通る漏れ磁束ループAが形成されなくなり、回転子100の極数の増加に伴う渦電流による温度上昇を抑制でき、温度上昇による出力の低下、磁石13の減磁、コイル23の寿命短縮を防止することができ、また、コスト低減を図ることができる。なお、この実施形態では、出力電流が低速側で微増し、高速側で大幅に増加するので、銅量(巻線量)を増加し、高速側の出力を抑制する必要がある。
【0027】
【発明の効果】
本発明の三相磁石式発電機によると、鍔部を通る漏れ磁束ループが形成されなくなり、回転子の極数の増加に伴う渦電流による温度上昇を抑制でき、温度上昇による出力の低下、磁石の減磁、コイルの寿命短縮を防止することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係る三相磁石式発電機の断面図である。
【図2】図1図示II−II線による断面図である。
【図3】固定子のコイル結線図である。
【図4】出力電圧のベクトル図である。
【図5】外部特性グラフである。
【図6】出力電流グラフである。
【図7】本実施形態の比較例としての従来一般的な三相磁石式発電機の断面図である。
【図8】同比較例の固定子のコイル結線図である。
【図9】同比較例の出力電圧のベクトル図である。
【図10】本発明の前提となる特願2002−156919記載の三相磁石式発電機の断面図である。
【符号の説明】
100  回転子
11  ロータ
13  永久磁石
200  固定子
21  積層コア
23  発電コイル
24  磁性体シート部材
24a  鍔部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a three-phase magnet type generator mounted on a motorcycle (motorcycle) or the like and charging a battery and supplying power to an electric load such as a headlight.
[0002]
[Conventional or prerequisite technology]
In recent years, three-phase magnet type generators for motorcycles have been required to be reduced in size and, at the same time, to increase the output current on the low rotation speed side due to the increase in electric load.
[0003]
However, a coil having a large diameter cannot be used with a reduction in the coil winding space, and an output current on a high rotation side also increases with an increase in an output current on a low rotation side. For this reason, in the conventional three-phase magnet type generator, that is, the three-phase magnet type generator having 2n poles of the rotor and 3n poles of the stator (n: any natural number), the output current on the high rotation side is suppressed. However, there was a problem that the coil temperature became high.
[0004]
Therefore, Japanese Patent Application Laid-Open No. 2001-112226 discloses a three-phase magnet generator in which the rotor has 16 poles and the stator has 18 poles. According to this three-phase magnet generator, the frequency is increased and the voltage is increased by increasing the number of poles of the rotor from the conventional 12 to 16 poles, and the output current on the low rotation side is increased. Since the magnet per pole is reduced and the output current on the high rotation side is reduced, there is an effect that the coil temperature can be reduced. Further, Japanese Patent Application No. 2002-156919 describes a three-phase magnet generator in which the number of poles of the stator is 3n (n: any natural number) and the number of poles of the rotor is 4n. . According to this three-phase magnet type generator, the effect of being inexpensive and improving the charging performance by increasing the output current on the low rotation side and lowering the coil temperature by reducing the output current on the high rotation side can be obtained. Play.
[0005]
[Problems to be solved by the invention]
However, in Japanese Patent Application No. 2002-156919, as shown in FIG. 10, the flange portion 24a of the magnetic sheet member 24 around which the coil 23 is wound with the laminated core 21 of the stator 200 interposed therebetween forms a leakage magnetic flux loop A. However, an increase in the number of poles of the rotor 100 causes an increase in temperature due to an eddy current, and this increase in temperature causes a decrease in output, in the worst case, a demagnetization of the magnet 13, and further shortens the life of the copper wire of the coil 23. It has been found that there is a possibility that it may cause.
[0006]
The present invention solves the above-described problems of the prerequisite technology, suppresses a temperature rise due to an increase in the number of poles of the rotor, and can improve output, extend the life of a coil, and the like. It is an object to provide a three-phase magnet generator.
[0007]
[Means for Solving the Problems]
The three-phase magnet generator according to claim 1 has a stator with 3n poles (n: an arbitrary natural number) wound with a coil and a stator with 2n + m (m: an arbitrary natural number) on which a permanent magnet is fixed. And a structure in which a flange of a magnetic sheet member around which the coil is wound with the laminated core of the stator interposed therebetween is deleted.
[0008]
According to the three-phase magnet type generator according to the first aspect, since the flange of the magnetic sheet member is deleted, a leakage magnetic flux loop passing through the flange is not formed, and therefore, a rise in temperature due to eddy current can be suppressed. it can.
[0009]
The three-phase magnet generator according to claim 2 has a stator having 3n poles (n: an arbitrary natural number) wound with coils and a pole number of 2n + m (m: an arbitrary natural number) to which a permanent magnet is fixed. A magnetic sheet member around which the coil is wound with the laminated core of the stator sandwiched therebetween.
[0010]
According to the three-phase magnet type generator according to the second aspect, since the magnetic sheet member is omitted, a leakage magnetic flux loop passing through the flange is not formed, and therefore, a temperature rise due to an eddy current can be suppressed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
1 is a cross-sectional view of a three-phase magnet type generator according to one embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, FIG. 3 is a coil connection diagram of a stator, and FIG. FIG. 5 is an external characteristic graph, FIG. 6 is an output current graph, FIG. 7 is a cross-sectional view of a conventional general three-phase magnet type generator as a comparative example of the present embodiment, and FIG. FIG. 9 is a coil connection diagram of the stator of the comparative example, and FIG. 9 is a vector diagram of the output voltage of the comparative example.
[0013]
1 and 2, the three-phase magnet type generator according to the present embodiment includes a rotor 100 and a stator 200.
[0014]
The rotor 100 includes a rotor 11 made of a magnetic material. The rotor 11 is finished by cutting after hot forging. Inside the boss 11a at the center of the rotor 11, a tapered portion 11b fitted to a crankshaft of an engine (not shown) is formed. In addition, the boss portion 11a has an end surface 11c serving as a fastening seat surface when the rotor 11 is fastened and fixed to the crankshaft using a nut (not shown) or the like, and a punch used when the rotor 11 is removed from the crankshaft. A screw portion 11d is formed. The end face 11e of the rotor 11 is provided with a plurality of cooling window holes 11f. The cylindrical outer peripheral portion 11g of the rotor 11 constitutes a yoke. A ring-shaped spacer 12 made of a nonmagnetic material, a plurality of permanent magnets 13 arranged at equal intervals in the circumferential direction, and a nonmagnetic material pressed into the rotor outer peripheral portion 11g are provided inside the rotor outer peripheral portion 11g. The ring-shaped positioning cases 14 are sequentially arranged along the axial direction of the crankshaft. The plurality of permanent magnets 13 are positioned at equal intervals in the circumferential direction by convex portions 14a formed on the positioning case 14, and a magnet protection ring 15 is pressed into the inside of the permanent magnets 13 so that a rotor outer peripheral portion 11g is formed. Is fixed to the rotor 11 by crimping the tip 11h of the rotor. The magnet protection ring 15 is formed by pressing a stainless steel plate.
[0015]
The stator 200 is provided inside the rotor 100. The stator 200 includes the laminated core 21. The laminated core 21 is formed by laminating a plurality of pressed iron plates. The laminated core 21 is sandwiched between the magnetic sheet members 24 and integrated by caulking the rivets 22. The surface of the laminated core 21 is insulated with an epoxy resin or the like. A copper wire for winding is wound around the magnetic sheet member 24 to form a power generation coil 23. The stator 200 is fixed to an engine case (not shown) by screwing a mounting bolt (not shown) into a screw hole 21 a formed in the laminated core 21 and the magnetic sheet member 24.
[0016]
The magnetic sheet member 24 is configured by removing the flange 24a from the magnetic sheet member 24 shown in FIG. For this reason, the leakage magnetic flux loop A passing through the flange portion 24a is not formed, so that the temperature rise due to the eddy current can be suppressed.
[0017]
Next, based on FIG. 2 to FIG. 4, regarding the number of poles of the stator 200, the coil connection method, the number of poles of the rotor 100, and the output voltage of the stator 200 of the three-phase magnet type generator according to the present embodiment, The description will be made in comparison with a general three-phase magnet type generator (FIGS. 7 to 9).
[0018]
The number of poles of the stator 200 in this embodiment is 3n (n: any natural number). On the other hand, the number of poles of the stator 200 of the conventional general three-phase magnet generator is also 3n. Therefore, when n = 4, the number of poles of the stator 200 of the present embodiment is 12, which is the same as the number of poles of the conventional stator 200, as is apparent with reference to FIGS.
[0019]
The method of connecting the coils 23 of the stator 200 in the present embodiment is as shown in FIG. 3 and is the same as the method of connecting the coils 23 of the conventional stator 200 shown in FIG. The winding direction is the same, and the jumper is wired with two poles. Therefore, since the length of the crossover wire is only two poles, a longer crossover wire is not required as compared with the related art (Japanese Patent Application Laid-Open No. 2001-112226), and the coil is not drawn out as compared with the conventional technology (Japanese Patent Application Laid-Open No. 2001-112226). Shaping becomes easy.
[0020]
On the other hand, the number of poles of the rotor 100 in the present embodiment is 4n (n: any natural number). On the other hand, the number of poles of the rotor 100 of the conventional general three-phase magnet type generator is 2n. Therefore, when n = 4, the number of poles of the conventional rotor 100 is eight, whereas the number of poles of the rotor 100 in the present embodiment is sixteen, as is apparent from FIGS. It becomes.
[0021]
Therefore, when n = 4, as shown in FIGS. 2 and 7, the mechanical angle of the conventional stator 200 is 30 ° and the electrical angle is 120 °, whereas the mechanical angle of the stator 200 in this embodiment is 30 °. The angle is 30 °, the electrical angle is 240 °, and the mechanical angle of the conventional rotor 100 is 45 ° and the electrical angle is 180 °, whereas the mechanical angle of the rotor 100 in the present embodiment is 22. 5 °, and the electrical angle is 180 °. Therefore, as apparent from FIGS. 4 and 9, the output voltage of the stator 200 in the present embodiment is different from the output voltage of the conventional stator 200 in the order of the phase, although the order of the phases is reversed. The phase difference is 120 °, and no phase difference occurs in the same phase. Therefore, no loss in output voltage due to the phase difference occurs, and it is not necessary to increase the size of the permanent magnet to compensate for the loss as in the related art (Japanese Patent Application Laid-Open No. 2001-112226).
[0022]
Next, comparing the external characteristics of the three-phase magnet generator (FIGS. 1 to 4) according to the present embodiment with the external characteristics of the conventional general three-phase magnet generator (FIGS. 7 to 9), FIG. As shown in the experimental results in FIG. 5, in the case of the three-phase magnet type generator according to the present embodiment, the current decreases from low rotation (1000 rpm) to high rotation (5000 rpm) as compared with the conventional general three-phase magnet type generator. And the voltage increases. Such experimental results show that the current decreases because the size of the permanent magnet 13 per pole is reduced, and the voltage decreases as the size of the permanent magnet 13 decreases. It is considered that the frequency is doubled because the number of poles is doubled, and as a result, the voltage is increased.
[0023]
Further, when the output current is measured with the voltage V kept constant, as shown in FIG. 6, at low rotation speed (1000 rpm), the output current according to the present embodiment becomes larger than the output current according to the related art, and as a result, the battery is charged. The current increases. On the other hand, at a high rotation speed (5000 rpm), the output current according to the present embodiment is smaller than the output current according to the related art, and as a result, the coil temperature is significantly reduced.
[0024]
Next, experimental results for the three-phase magnet type generator (invention generator) according to the above-described embodiment and the three-phase magnet type generator (premise generator) shown in FIG. 10 will be described. The experiment was performed by attaching a thermocouple to the core surface (magnetic material sheet member 24), inserting a thermocouple into the intermediate layer of the coil 23, operating at 6000 rpm for 5 minutes, and measuring the temperature. As a result, in the premise generator, the core surface temperature was estimated to be 156 ° C. and the coil temperature was estimated to be 163 ° C. (this is an estimated value due to the occurrence of thermal demagnetization). ° C and the coil temperature were measured at 125 ° C, demonstrating the effect of suppressing the temperature rise.
[0025]
As described above, the three-phase magnet type generator according to the present embodiment has the stator 200 with the number of poles 3n (n: any natural number) wound with the coil 23 and the number of poles with the permanent magnet 13 fixed. 4n of the rotor 100, and the flange portion 24a of the magnetic sheet member 24 around which the coil 23 is wound with the laminated core 21 of the stator 200 interposed therebetween is omitted. For this reason, the leakage magnetic flux loop A passing through the flange portion 24a is not formed, and the temperature increase due to the eddy current due to the increase in the number of poles of the rotor 100 can be suppressed, the output decreases due to the temperature increase, the magnet 13 is demagnetized, and the coil increases. 23 can be prevented from being shortened. Further, with the elimination of the flange portion 24a, the shape of the magnetic sheet member is simplified, and the cost can be reduced. Note that the present embodiment is not limited to the rotor 100 having 4n poles, but a three-phase magnet generator having the rotor 100 having 2n + m (m: any natural number) larger than the conventional pole 2n. Is widely applicable.
[0026]
As another embodiment of the present invention, although not shown, there can be cited one in which the magnetic sheet member 24 is omitted. According to this embodiment as well, the leakage magnetic flux loop A passing through the flange portion 24a is not formed, the temperature rise due to the eddy current due to the increase in the number of poles of the rotor 100 can be suppressed, the output decreases due to the temperature rise, and the magnet 13 decreases. It is possible to prevent the life of the magnet and the coil 23 from being shortened, and to reduce the cost. In this embodiment, since the output current slightly increases on the low-speed side and greatly increases on the high-speed side, it is necessary to increase the amount of copper (winding amount) and suppress the output on the high-speed side.
[0027]
【The invention's effect】
According to the three-phase magnet type generator of the present invention, a leakage magnetic flux loop passing through the flange portion is not formed, and a temperature rise due to an eddy current accompanying an increase in the number of poles of the rotor can be suppressed. , And shortening of the life of the coil can be prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view of a three-phase magnet type generator according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line II-II shown in FIG.
FIG. 3 is a coil connection diagram of a stator.
FIG. 4 is a vector diagram of an output voltage.
FIG. 5 is an external characteristic graph.
FIG. 6 is an output current graph.
FIG. 7 is a cross-sectional view of a conventional general three-phase magnet generator as a comparative example of the present embodiment.
FIG. 8 is a coil connection diagram of the stator of the comparative example.
FIG. 9 is a vector diagram of an output voltage of the comparative example.
FIG. 10 is a sectional view of a three-phase magnet generator described in Japanese Patent Application No. 2002-156919, which is a premise of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 rotor 11 rotor 13 permanent magnet 200 stator 21 laminated core 23 power generating coil 24 magnetic sheet member 24a flange

Claims (2)

コイルが巻かれた極数3n(n:任意の自然数)の固定子と、永久磁石が固定された極数2n+m(m:任意の自然数)の回転子とを有し、かつ、前記固定子の積層コアを挟んだ状態で前記コイルが巻き付けられる磁性体シート部材の鍔部を削除して構成されることを特徴とする三相磁石式発電機。It has a stator with a number of poles of 3n (n: an arbitrary natural number) around which a coil is wound, and a rotor with a number of poles of 2n + m (m: an arbitrary natural number) to which a permanent magnet is fixed. A three-phase magnet-type power generator, wherein a flange of a magnetic sheet member around which the coil is wound with a laminated core sandwiched therebetween is removed. コイルが巻かれた極数3n(n:任意の自然数)の固定子と、永久磁石が固定された極数2n+m(m:任意の自然数)の回転子とを有し、かつ、前記固定子の積層コアを挟んだ状態で前記コイルが巻き付けられる磁性体シート部材を削除して構成されることを特徴とする三相磁石式発電機。It has a stator with a number of poles of 3n (n: an arbitrary natural number) around which a coil is wound, and a rotor with a number of poles of 2n + m (m: an arbitrary natural number) to which a permanent magnet is fixed. A three-phase magnet generator, wherein the magnetic sheet member around which the coil is wound with the laminated core interposed therebetween is omitted.
JP2002249076A 2002-08-28 2002-08-28 Three-phase magnetic generator Pending JP2004088955A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738574B1 (en) * 2006-06-22 2007-07-11 현대중공업 주식회사 The motor attached inverter for electric propulsion of submarine with a single body of its stator and inverter
US7268450B2 (en) 2004-09-29 2007-09-11 Denso Corporation Permanent magnet type generator
US7271517B2 (en) 2002-11-12 2007-09-18 Mitsubishi Denki Kabushika Kaisha Three-phase alternating current generator
JP2009038944A (en) * 2007-08-03 2009-02-19 Denso Trim Kk Permanent-magnet generator
US7791241B2 (en) 2002-05-30 2010-09-07 Denso Corporation Permanent magnet type three-phase AC generator
JP2014239613A (en) * 2013-06-07 2014-12-18 スズキ株式会社 Generator for motorcycle
KR20180026579A (en) 2013-06-26 2018-03-12 프로틴 일렉트릭 리미티드 An electric motor or generator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7791241B2 (en) 2002-05-30 2010-09-07 Denso Corporation Permanent magnet type three-phase AC generator
US7271517B2 (en) 2002-11-12 2007-09-18 Mitsubishi Denki Kabushika Kaisha Three-phase alternating current generator
US7268450B2 (en) 2004-09-29 2007-09-11 Denso Corporation Permanent magnet type generator
USRE43055E1 (en) 2004-09-29 2012-01-03 Denso Corporation Permanent magnet type generator
KR100738574B1 (en) * 2006-06-22 2007-07-11 현대중공업 주식회사 The motor attached inverter for electric propulsion of submarine with a single body of its stator and inverter
JP2009038944A (en) * 2007-08-03 2009-02-19 Denso Trim Kk Permanent-magnet generator
JP2014239613A (en) * 2013-06-07 2014-12-18 スズキ株式会社 Generator for motorcycle
KR20180026579A (en) 2013-06-26 2018-03-12 프로틴 일렉트릭 리미티드 An electric motor or generator

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