JP6578506B2 - Rotating electric machine and electric blower provided with the same - Google Patents

Rotating electric machine and electric blower provided with the same Download PDF

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JP6578506B2
JP6578506B2 JP2015024895A JP2015024895A JP6578506B2 JP 6578506 B2 JP6578506 B2 JP 6578506B2 JP 2015024895 A JP2015024895 A JP 2015024895A JP 2015024895 A JP2015024895 A JP 2015024895A JP 6578506 B2 JP6578506 B2 JP 6578506B2
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armature
field
pair
substantially central
central portion
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JP2016149855A5 (en
JP2016149855A (en
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哲夫 嶋崎
哲夫 嶋崎
藤田　克敏
克敏 藤田
上野　信人
信人 上野
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Panasonic Intellectual Property Management Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

本発明は、発電機や電動機等を成す回転電機に関するものであり、特に、電気掃除機等に搭載されて、電動機の動力によりファンを回転させて風を送る電動送風機に関する。 The present invention relates to rotary electric machine forming a power generator or a motor or the like, in particular, is mounted on an electric vacuum cleaner, etc., by rotating the fan to an electric blower sending air by the power of the motor.

電気掃除機に搭載される電動送風機の回転電機である電動機部には、通常、整流子電動機が採用されている。この整流子電動機は、界磁と、電機子と、を有する。界磁は、界磁鉄心の筒内にコイルが巻回されて構成される。界磁鉄心は、薄い鋼板を複数積層して形成される。電機子は、界磁内に回転自在に設けられる。以下の説明において、整流子電動機は、単に電動機ともいう。 The motor unit is a rotating electric machine of the electric blower mounted in the vacuum cleaner, typically, the commutator motor has been employed. This commutator motor has a field and an armature. Field, the coil is formed by winding into a cylinder of the field iron core. The field iron core is formed by laminating a plurality of thin steel plates. The armature is et rotatably provided to the field磁内. In the following description, the commutator motor is also simply referred to as an electric motor.

従来の電気掃除機に搭載される電動送風機が有する電動機は、図４に示すように、界磁鉄心１０６の内側に、界磁巻線１０７を巻回するための突極１０５が設けられている。突極１０５は、両側に延びた第１辺部１１６を有する。界磁鉄心１０６は、第１辺部１１６と、この第１辺部１１６と直交する、一対の第２辺部１１７と、で方形筒状を呈している。 As shown in FIG. 4, an electric motor included in an electric blower mounted on a conventional vacuum cleaner is provided with a salient pole 105 for winding a field winding 107 inside a field core 106. . Salient poles 10 5 have a first side portion 116 extending on both sides. Field cores 106 includes a first side portion 116, perpendicular to the first side portion 1 16, and has a pair of second side portion 117, in a square tube shape.

界磁巻線１０７に電流が流れると、磁束が生じる。生じた磁束は、界磁鉄心１０６の突極１０５を透過して、電機子１０４に達する。届いた磁束の影響を受けて、電機子１０４は、界磁１０３に対して回転する。こうした構成の界磁鉄心１０６を備える界磁１０３は、界磁鉄心１０６が有する各角部を筒状のフレーム１０２の内面に密着させて内蔵される。 When the electric current to the field winding 107 Ru flow, magnetic flux occurs. The resulting magnetic flux is transmitted through the salient pole 105 of the field core 106, it reaches the armature 104. Under the influence of the received magnetic flux, the armature 104, it rotates relative field 103. Field 103 which comprises a field core 106 of such a configuration, Ru is built in close contact with each corner portion having the field iron core 106 on the inner surface of the tubular frame 102.

従来、界磁鉄心１０６が有する第２辺部１１７の幅は、Ｌ０で一定としている。ここで、電機子巻線に電流が流れると、電機子磁束が発生する。発生した電機子磁束は、界磁鉄心１０６の突極１０５間を連結する第２辺部１１７の中間を通って、突極１０５を通過するように流れる。つまり、界磁鉄心１０６が有する突極１０５間を連結する第２辺部１１７における磁束流れは、次のようになる。すなわち、界磁巻線１０７のみに電流を流したときに発生する界磁磁束は、一定方向となる。一方、電機子巻線のみに電流を流したときに発生する電機子磁束は、界磁鉄心１０６が有する第２辺部１１７の中間部分で、１８０度反転した向きに分離して流れる。 Conventionally, the width of the second side portion 117 having the field cores 106 is constant at L0. Here, when a current flows through the armature winding , an armature magnetic flux is generated. Armature magnetic flux generated passes through the middle of the second side portion 117 for connecting the salient poles 105 of the field core 106, flows so as to pass through the salient pole 105. That is , the magnetic flux flow in the second side 117 that connects between the salient poles 105 of the field core 106 is as follows. That is, the field magnetic flux generated when a current is supplied only to the field winding 107 is in a fixed direction . On the other hand, the armature magnetic flux generated when current flows only in the armature windings, an intermediate portion of the second side portion 117 included in the field core 106, flows separated into 180 ° reversed orientation.

このため、電動機全体に電流を流したときに発生する界磁鉄心が有する各辺部の磁束量は、突極間において均一ではなく、磁束量が変化している。磁束量が変化する傾向は、回転方向によって決まる。しかしながら、従来の界磁鉄心は、磁束量が不均一であっても、第２辺部の幅寸法を均一としていた。 For this reason, the magnetic flux amount of each side part of the field core that is generated when a current is passed through the entire motor is not uniform between the salient poles, and the magnetic flux amount is changed. Tendency for the magnetic flux amount is varied is determined by the direction of rotation. However, the conventional field core has a uniform width dimension of the second side even if the amount of magnetic flux is not uniform.

近年、電気掃除機に対する小型・軽量への要求から、電動送風機には小型化することが求められる。電動機を小型するために鉄心形状を小型化すると、一般的に、界磁鉄心の平均的な磁束密度が増加し、電機子反作用の影響を受けやすくなる。電機子反作用は、界磁磁束を減磁させたり、局部的に磁束密度を増加させたりする。よって、電動機の性能が低下するという課題を有していた。 In recent years, the demand for small and lightweight for the vacuum cleaner, the electric blower is required to be miniaturized. To a compact core shape for compact electric motor, in general, increased average magnetic flux density of the field iron core, susceptible to armature reaction. Armature reaction is or is demagnetized field flux, or locally increase the magnetic flux density. Therefore , it has the subject that the performance of an electric motor falls.

また、鉄心形状を小型化すると、スロット開口部の寸法も小さくなる。しかし、巻線を巻き付ける工法上、必要とされるスロット開口部の寸法は、鉄心形状が小さくなっても同じである。界磁鉄心と巻線との間には絶縁紙が設けられる。なお、スロット開口部に用いられる絶縁紙には、巻線と界磁鉄心との間の絶縁距離を確保することが求められる。スロット開口部の寸法が狭くなった場合は、絶縁紙と界磁鉄心との間に巻線が入って、絶縁不良となることがあるという課題を有していた。 Further, when the iron core shape is reduced in size, the size of the slot opening is also reduced . However, the dimensions of the method on the slot opening which is required to wind the winding is same as even iron core shape is reduced. Between the field iron core and the windings Ru provided insulating paper. Incidentally, the insulating paper used in the slot opening, it is necessary to ensure an insulation distance between the winding and the field iron core. If the size of the slot opening is narrower, contains the windings between the insulating sheet and the field iron core, there is a problem that it may become poor insulation.

これに対し、特許文献１には、電機子巻線に流れる電流で発生する電機子磁束による主磁束流れの偏りを、空隙ギャップ幅を調整することで、脈動トルクを低減することが開示されている。脈動トルクを低減することにより、機械的振動を減少させて、ブラシ寿命を改善できるという効果が得られる。 In contrast, Patent Document 1, the bias of the main magnetic flux flow by the armature magnetic flux generated by the current flowing in the armature winding, by adjusting the gap the gap width, it is disclosed to reduce the torque ripple Yes. By reducing the pulsating torque, it is possible to reduce the mechanical vibration and improve the brush life.

また、特許文献２には、スロット絶縁部材が、界磁鉄心の厚み方向にずれ動いたり、斜めになったりした状態で巻線がされるため、界磁巻線と界磁鉄心とが接触して、所定の絶縁耐圧を確保できなくなるという、巻線不良を抑制することが開示されている。その原因は、巻線作業の際、スロット絶縁部材に作用する振動や界磁巻線に対する張力である。 Further, Patent Document 2, the slot insulating member, or moving displacement in the thickness direction of the field core, because the wire wound in a state or skewed, and the field winding and the field core in contact to, that can not be secured a predetermined withstand voltage, it is disclosed that suppress winding failure. The cause is the vibration acting on the slot insulating member during the winding work and the tension on the field winding.

また、特許文献３には、界磁鉄心の外径をなす円弧の周長を大きくすることで、界磁鉄心が有する突極の先端と、界磁鉄心の辺部間のスロット開口部の幅と、を大きくした形状が示されている。 In Patent Document 3, the width of the slot opening between the tip of the salient pole of the field core and the side of the field core is increased by increasing the circumference of the arc that forms the outer diameter of the field core. And the shape which enlarged is shown.

特許第５１７８３０７号公報Japanese Patent No. 5178307 特開２０１０−５７３４０号公報JP 2010-57340 A 特開２０１３−１３２６７号公報JP 2013-13267 A

しかしながら、特許文献１の構成では、界磁鉄心の重量は従来と同等であるため、製品に対する軽量化の要求には効果がない。更に、電動機を小型化すれば、空隙ギャップによる磁気抵抗の割合が大きくなり、電動機の性能が低下するという課題を有していた。 However, in the configuration of Patent Document 1, since the weight of the field iron core is equal to that of the conventional one, there is no effect on the demand for weight reduction of the product. Moreover, lever to reduce the size of the electric motor, the ratio of the magnetic resistance increases by an airgap, the performance of the motor has a problem of a decrease.

また、特許文献２の構成では、界磁鉄心が有する突極の先端と、界磁鉄心が有する各辺部間のスロット開口部の幅が狭くなる。よって、小型の電動機では、突極の先端とスロット絶縁部材との間に巻線が入り、絶縁不良になり易くなるという課題を有していた。 Moreover , in the structure of patent document 2, the width | variety of the slot opening part between the front-end | tip of a salient pole which a field iron core has, and each side which a field iron core has becomes narrow . Therefore, the small motor, the windings between the tip and the slot insulation member of the salient pole enters, there is a problem that tends become insulation failure.

また特許文献３の構成では、界磁鉄心の所要量が増加するため高価となる。更に、特許文献３の構成では、重量が重くなるため、電動機が搭載される家電の軽量化に対して、最適な仕様とはならないという課題を有していた。 In the configuration of Patent Document 3, that Do and expensive for the required amount of field iron core is increased. Furthermore, in the configuration of Patent Document 3, since the weight becomes heavy, and to weight of the household appliance motor is mounted, it has been a problem that not optimum specifications.

本発明は、上記従来の回転電機の問題に鑑みてなされたものであり、性能を維持しつつ、より一層の小型軽量化を実現できるようにした回転電機を提供することを目的とする。 The present invention has been made in view of the problems of the conventional rotating electric machine described above, and an object thereof is to provide a rotating electric machine capable of realizing further reduction in size and weight while maintaining performance.

上記の目的を達成するため、本発明の回転電機は、界磁と、電機子と、を具備する。界磁は、方形筒状の界磁鉄心と、界磁巻線と、を備える。界磁鉄心は、一対の第１辺部と、一対の第２辺部と、を有する。一対の第１辺部は、それぞれ突極を内面に有する。一対の第２辺部は、一対の第１辺部のそれぞれの端部同士をつなぐ。一対の第２辺部は、向い合って位置する。界磁巻線は、突極のそれぞれに巻回される。電機子は、突極間に配置される。回転電機において、一対の第２辺部のそれぞれは、略中央部の幅が最も狭い。さらに、電機子が所定方向に回転するとき、電機子の回転方向において、一対の第２辺部のそれぞれは、略中央部よりも上流に位置する第１の端部と、前記略中央部よりも下流に位置する第２の端部と、を有する。略中央部の幅（Ｌ２）は、第１の端部の幅（Ｌ１）よりも狭く、第２の端部の幅（Ｌ３）と実質的に等しい。 In order to achieve the above object, a rotating electrical machine of the present invention includes a field and an armature. The field includes a square cylindrical field core and a field winding. The field iron core has a pair of first sides and a pair of second sides. Each of the pair of first sides has salient poles on the inner surface. The pair of second sides connects the respective ends of the pair of first sides. The pair of second sides is located facing each other. The field winding is wound around each of the salient poles. The armature is disposed between the salient poles. In the rotating electrical machine, each of the pair of second side portions has the narrowest width at the substantially central portion. Further, when the armature rotates in a predetermined direction, each of the pair of second side portions in the rotation direction of the armature includes a first end located upstream from the substantially central portion and the substantially central portion. And a second end located downstream. The width (L2) of the substantially central portion is narrower than the width (L1) of the first end portion and is substantially equal to the width (L3) of the second end portion .

このような構成の鉄心を用いることにより、電機子と界磁鉄心が有する第２辺部との間の距離は、従来よりも大きくなるため、電機子磁束を抑制することができる。更に、本構成とすれば、界磁鉄心が有する突極の先端と、界磁鉄心が有する各辺部との間に位置するスロット開口部の幅が大きくなる。よって、突極の先端とスロット絶縁部材との間に巻線が入ることで生じていた絶縁不良の発生を抑制することができる。つまり、小型の界磁鉄心であっても、巻線の作業性を確保することができる。したがって、更に、回転電機の小型、軽量化を図ることができる。 By using core having such a structure, the distance between the second side portion having armature and field iron core, Do greater than conventional because, Ru can be suppressed armature flux. Moreover, if this configuration, the tip of the salient poles having the field iron core, the width of the slot opening located between each side portion having the field iron core is increased. Therefore, Ru can be suppressed insulation defective which occurs by winding falls between the tip and the slot insulation member of the salient pole. That is , the workability of the winding can be ensured even with a small field iron core. Therefore, it is possible to further reduce the size of the rotary electric machine, the weight reduction.

本発明によれば、小型の界磁鉄心であっても、スロット開口部の開口寸法を確保することができる。よって、本発明を用いれば、巻線の作業性を確保することができ、小型、軽量化に資する回転電機を提供することができる。 According to the present invention, even a small field cores, it is possible to ensure the opening size of the slot opening. Thus, using the present invention, it is possible to ensure the workability of the winding, it is possible to provide a rotating electric machine that will contribute a small and lightweight.

本発明の実施の形態１における回転電機を備えた電動送風機の半断面図The half sectional view of the electric blower provided with the rotary electric machine in Embodiment 1 of the present invention 本発明の実施の形態１における回転電機の界磁鉄心の断面図Sectional view of the field core of a rotary electric machine according to Embodiment 1 of the present invention 本発明の実施の形態２における回転電機の界磁鉄心の断面図Sectional view of the field core of a rotary electric machine according to Embodiment 2 of the present invention 従来の回転電機の鉄心部の断面図Sectional view of the iron core of a conventional rotating electrical machine

（実施の形態１）
以下、本発明の実施の形態１における回転電機および電動送風機について、図１、２を参照しつつ説明する。 (Embodiment 1)
Hereinafter, the rotating electrical machine and the electric blower according to Embodiment 1 of the present invention will be described with reference to FIGS.

以下の説明において、回転電機の一例として、整流子を用いた電動機を示す。なお、本発明は、同様の作用効果を奏するものであれば、他の回転電機、例えば、発電機や他の形態の電動機でも同様の作用効果を奏することができる。In the following description, an electric motor using a commutator is shown as an example of a rotating electrical machine. In addition, if this invention has the same effect, another rotary electric machine, for example, a generator and the electric motor of another form, can also show the same effect.

図１、２に示すように、本発明の実施の形態１における回転電機である電動機２０は、界磁３と、電機子４と、を具備する。界磁３は、方形筒状の界磁鉄心６と、界磁巻線７と、を備える。界磁鉄心６は、一対の第１辺部１６と、一対の第２辺部１７と、を有する。一対の第１辺部１６は、それぞれ突極５を内面に有する。一対の第２辺部１７は、一対の第１辺部１６のそれぞれの端部同士をつなぐ。一対の第２辺部１７は、向い合って位置する。界磁巻線７は、突極５のそれぞれに巻回される。電機子４は、突極５間に配置される。回転電機である電動機２０において、一対の第２辺部１７のそれぞれは、略中央部１９の幅Ｌ２が最も狭い。As shown in FIGS. 1 and 2, the electric motor 20 that is a rotating electric machine according to the first embodiment of the present invention includes a field 3 and an armature 4. The field 3 includes a rectangular cylindrical field iron core 6 and a field winding 7. The field core 6 has a pair of first side portions 16 and a pair of second side portions 17. Each of the pair of first side portions 16 has a salient pole 5 on the inner surface. The pair of second side portions 17 connects the ends of the pair of first side portions 16 to each other. The pair of second side portions 17 are located facing each other. The field winding 7 is wound around each of the salient poles 5. The armature 4 is disposed between the salient poles 5. In the electric motor 20 which is a rotating electric machine, each of the pair of second side portions 17 has the narrowest width L2 of the substantially central portion 19.

本実施の形態１において、略中央部１９とは、回転軸（１０）の中心を含む面と、第２辺部１７とが直交する近辺をいう。略中央部１９は、第２辺部１７の実質的な中央部分を意図するものであり、製造上含まれる誤差等により、その位置が多少ずれてもよい。In the first embodiment, the substantially central portion 19 refers to the vicinity where the surface including the center of the rotation axis (10) and the second side portion 17 are orthogonal to each other. The substantially central portion 19 is intended to be a substantial central portion of the second side portion 17, and its position may be slightly shifted due to an error included in manufacturing.

特に、本発明の実施の形態１における回転電機である電動機２０は、電機子４が所定方向に回転するとき、電機子４の回転方向において、一対の第２辺部１７のそれぞれは、略中央部１９よりも広い幅Ｌ１を有する端部１８が略中央部１９よりも上流側に位置する。In particular, in the electric motor 20 that is the rotating electric machine according to the first embodiment of the present invention, when the armature 4 rotates in a predetermined direction, each of the pair of second side portions 17 in the rotation direction of the armature 4 has a substantially central position. An end portion 18 having a width L1 wider than the portion 19 is positioned on the upstream side of the substantially central portion 19.

本実施の形態１において、電機子４が回転する所定方向とは、時計回り、反時計周りのいずれもが含まれる。言い換えれば、本実施の形態１における第２辺部１７は、その略中央部１９の幅Ｌ２が最も狭くなるとともに、第２辺部１７の両方に位置するそれぞれの端部１８の幅Ｌ１は、略中央部１９の幅Ｌ２よりも広い形状である。In the first embodiment, the predetermined direction in which the armature 4 rotates includes both clockwise and counterclockwise directions. In other words, the second side portion 17 in the first embodiment has the width L2 of the substantially central portion 19 that is the narrowest, and the width L1 of each end portion 18 located on both the second side portions 17 is: The shape is wider than the width L <b> 2 of the substantially central portion 19.

また、本発明の実施の形態１における回転電機である電動機２０では、一対の第２辺部１７のそれぞれは、略中央部１９において、電機子４と向い合う内面が電機子４の反対側に向かって窪んでいる。Further, in the electric motor 20 that is the rotating electric machine according to the first embodiment of the present invention, each of the pair of second side portions 17 has an inner surface facing the armature 4 on the opposite side of the armature 4 at the substantially central portion 19. It is recessed towards.

また、本発明の実施の形態１における回転電機である電動機２０では、一対の第２辺部１７のそれぞれは、略中央部１９から端部１８に向かって傾斜を有する傾斜面を含む。In electric motor 20 that is the rotating electrical machine according to the first embodiment of the present invention, each of the pair of second side portions 17 includes an inclined surface that is inclined from substantially central portion 19 toward end portion 18.

言い換えれば、第２辺部１７の内周側に位置する、電機子４と向い合う内面は、両方の端部１８を結ぶ線よりも、略中央部１９が外周側に位置する形状となっている。そして、略中央部１９と、それぞれの端部１８とを結ぶ内面は、傾斜を有する傾斜面を成す。In other words, the inner surface facing the armature 4 located on the inner peripheral side of the second side portion 17 has a shape in which the substantially central portion 19 is positioned on the outer peripheral side with respect to the line connecting both end portions 18. Yes. And the inner surface which connects the substantially center part 19 and each edge part 18 comprises the inclined surface which has an inclination.

さらに、本発明の実施の形態１における電動送風機１は、上述した回転電機である電動機２０と、遠心ファン１１と、を備える。Furthermore, the electric blower 1 according to Embodiment 1 of the present invention includes the electric motor 20 that is the rotating electric machine described above, and the centrifugal fan 11.

図面を用いて、さらに詳細に説明する。図１に示すように、電動送風機１は、一方が閉塞し、その反対方向が開口した円筒状のフレーム２内に、電動機２０が設けられている。電動機２０は、界磁３と、電機子４とを主たる構成要素として、概略構成されている。ブラケット８とファンケース９は、フレーム２の開口した側を覆うように取り付けられている。 Further details will be described with reference to the drawings. As shown in FIG. 1, the electric blower 1, one closed, in the opposite direction opening the cylindrical frame 2, the motor 20 is provided. Motor 20 includes a field 3, the armature 4 as main components, that is schematically configured. Brackets 8 and the fan case 9 is attached so as to cover the open side of the frame 2.

電機子４は、回転軸１０に固定されている。回転軸１０は、ブラケット８から突出してファンケース９内に進入している。回転軸１０の先端部には、遠心ファン１１が取り付けられている。遠心ファン１１とフレーム２の開口との間には、ブラケット８とエアガイド１２が取り付けられている。ブラケット８とエアガイド１２とは、ファンケース９の内部に配置されている。 The armature 4 is fixed to the rotating shaft 10. Rotating shaft 10 enters into the fan casing 9 protrudes from the bracket 8. A centrifugal fan 11 is attached to the tip of the rotating shaft 10 . A bracket 8 and an air guide 12 are attached between the centrifugal fan 11 and the opening of the frame 2 . The bracket 8 and the air guide 12 is arranged on the inner portion of the fan case 9.

本構成において、ファンケース９の中央に形成された開口より、外部の空気が吸引される。吸引された空気は、遠心ファン１１から筐体内部へと吐出される。吐出された空気は、エアガイド１２を経てブラケット８内に導かれる。ブラケット８内に導かれた空気は、主に、界磁鉄心（６）と電機子４との間にできる空間を通過して、フレーム２の外側へ排出されるようになっている。 In this arrangement, the opening formed in the center of the fan case 9, outside air Ru sucked. The sucked air is discharged from the centrifugal fan 11 into the housing. The discharged air is Ru led into the bracket 8 via the air guide 12. Air introduced into the bracket 8 is mainly through the space that can be between the field core (6) and the armature 4, and is discharged to the outside of the frame 2.

図２は、図１のＡＡ断面を示している。界磁３は、フレーム２の筒内に、方形筒状を呈する界磁鉄心６と、突極５に巻回される界磁巻線７とを備えている。界磁鉄心６は、打ち抜いて製造された鋼板が複数積層されて形成される。界磁鉄心６には、対向する一対の突極５が形成される。電機子４は、その突極５に挟まれるように、フレーム２の筒内に回転自在に設けられる。 Figure 2 shows a cross section AA of Figure 1. The field magnet 3 includes a field iron core 6 having a rectangular cylindrical shape and a field winding 7 wound around the salient pole 5 in the cylinder of the frame 2 . The field core 6 is formed by laminating a plurality of steel plates manufactured by punching. A pair of opposed salient poles 5 are formed on the field iron core 6. The armature 4, so as to be interposed the salient pole 5 is provided rotatably in the cylinder of the frame 2.

界磁３が備える界磁鉄心６は、その外径１３がフレーム２の内径に圧接して保持されている。 Field core provided in the field 3-6, the outer diameter 13 of that is that is held in pressure contact with the inner diameter of the frame 2.

界磁鉄心６は、一対の第１辺部１６と、一対の第２辺部１７とが一体につながれて、方形筒状に形成されている。一対の第１辺部１６のそれぞれは、内面に突極５を有している。一対の第２辺部１７のそれぞれは、突極５が形成された第１辺部１６の両端に位置する端部と接続される。具体的には、一対の第２辺部１７のそれぞれは、向い合って位置する一対の第１辺部１６の端部どうしを一体につなぐよう、設けられる。第１辺部１６の端部は、隣接する第２辺部１７の端部１８で接続される。界磁鉄心６は、第２辺部１７の端部１８の幅Ｌ１よりも、略中央部１９の幅Ｌ２のほうが狭い。界磁鉄心６は、第２辺部１７の端部１８から略中央部１９に向かって、傾斜が設けられている。第２辺部１７の端部１８から略中央部１９の間には、内周側に傾斜面が形成される。 Field iron core 6, a first side portion 16 of the pair, and a pair of second side portions 17 are formed are coupled together, a square tubular. Each of the pair of first side portions 16 has salient poles 5 on the inner surface. Each of the pair of second side portions 17 is connected to end portions located at both ends of the first side portion 16 where the salient poles 5 are formed. Specifically, each of the pair of second side portions 17 is provided so as to integrally connect the end portions of the pair of first side portions 16 that face each other. The end portions of the first side portions 16 are connected by the end portions 18 of the adjacent second side portions 17. Field core 6, than the width L1 of the end portion 18 of the second side section 17, narrower towards the width L2 of the substantially central portion 19. Field core 6, from the end 18 of the second side portion 17 toward the substantially central portion 19, the inclined are provided. An inclined surface is formed on the inner peripheral side between the end portion 18 of the second side portion 17 and the substantially central portion 19.

第２辺部１７の略中央部１９は、電機子４と向い合う内面が電機子４の反対側に向かって窪んでいる。言い換えれば、第２辺部１７の略中央部１９は、電機子４との間の空間が広くなるように、第２辺部１７の外部に向かって窪んでいる。In the substantially central portion 19 of the second side portion 17, the inner surface facing the armature 4 is recessed toward the opposite side of the armature 4. In other words, the substantially central portion 19 of the second side portion 17 is recessed toward the outside of the second side portion 17 so that the space between the armature 4 and the armature 4 is widened.

界磁鉄心６の内側において、突極５と、第１辺部１６および第２辺部１７で囲われた空間は、スロット１４を形成する。スロット１４には、突極５に巻き回された界磁巻線７が収納される。スロット１４において、界磁鉄心６と界磁巻線７との間には、絶縁紙１５が設けられている。Inside the field core 6, the space surrounded by the salient pole 5 and the first side 16 and the second side 17 forms a slot 14. The slot 14 accommodates the field winding 7 wound around the salient pole 5. In the slot 14, insulating paper 15 is provided between the field iron core 6 and the field winding 7.

この実施の形態によれば、以下に示す効果を得ることができる。すなわち、第２辺部において、第１辺部と接する端部よりも略中央部のほうが、幅が狭い。本構成により、電機子から発生した磁束が第２辺部をとおる磁気回路は、磁気抵抗が大きくなるため、電機子反作用の影響を抑制できる。 According to this embodiment, it is possible to obtain the following effects. That is, in the second side portion, the width at the substantially central portion is narrower than the end portion in contact with the first side portion. With this configuration, a magnetic circuit the magnetic flux generated from the armature passing through the second side portion, since the magnetic resistance is increased, it is possible to suppress the influence of the armature reaction.

また、界磁鉄心のスロットを広くするように、第２辺部の略中央部を外部に向かって窪ませることにより、界磁スロットの開口部の幅を大きくできるため、小型の界磁鉄心であっても巻線の作業性を確保することができ、絶縁不良を抑制することができる。しかも、界磁巻線と電機子との間の空間を大きくすることができるため、巻線近辺の冷却風が増加して巻線の温度上昇を抑制できる。更に、界磁スロットの開口部の幅を大きくすることにより、該空間を流れる空気の風損を抑制することができる。また、界磁鉄心の重量を抑制することができるため、製品を軽くすることができる。 Also, so as to widen the field core slots, by recessing toward the substantially central portion of the second side portion to the outside, it is possible to increase the width of the opening of the field slots, small field iron core even it is possible to ensure the workability of the winding, it is possible to suppress the insulation failure. Moreover, it is possible to suppress the space because it is possible to increase the temperature rise of the winding cooling air is increased in the vicinity of the windings between the field winding and the armature. Furthermore , the windage loss of the air flowing through the space can be suppressed by increasing the width of the opening of the field slot . Moreover, since the weight of a field iron core can be suppressed, a product can be made light.

（実施の形態２）
つぎに、本発明の実施の形態２における回転電機について、図面を用いて説明する。なお、以下の説明において、実施の形態１で説明した構成要素と同じものについては、同じ符号を付して、その説明を援用する。 (Embodiment 2)
Next, a rotating electrical machine according to Embodiment 2 of the present invention will be described with reference to the drawings. In the following description, the same components as those described in Embodiment 1 are denoted by the same reference numerals, and the description thereof is incorporated.

図３に示すように、本発明の実施の形態２における回転電機である電動機は、電機子（４）が所定方向に回転するとき、電機子（４）の回転方向において、一対の第２辺部（１７）のそれぞれは、略中央部１９よりも上流に位置する第１の端部である上流側端部１８ａと、略中央部１９よりも下流に位置する第２の端部である下流側端部１８ｂと、を有する。As shown in FIG. 3, the electric motor that is the rotating electrical machine according to the second embodiment of the present invention has a pair of second sides in the rotational direction of the armature (4) when the armature (4) rotates in a predetermined direction. Each of the portions (17) is an upstream end portion 18a that is a first end portion that is positioned upstream of the substantially central portion 19 and a downstream portion that is a second end portion that is positioned downstream of the approximately central portion 19. Side end 18b.

略中央部１９の幅Ｌ２は、第１の端部である上流側端部１８ａの幅Ｌ１よりも狭く、第２の端部である下流側端部１８ｂの幅Ｌ３と等しい。The width L2 of the substantially central portion 19 is narrower than the width L1 of the upstream end 18a that is the first end, and is equal to the width L3 of the downstream end 18b that is the second end.

特に、本発明の実施の形態２における回転電機である電動機（２０）は、電機子（４）が所定方向に回転するとき、電機子（４）の回転方向において、一対の第２辺部（１７）のそれぞれは、略中央部１９よりも広い幅Ｌ１を有する端部である上流側端部１８ａが略中央部１９よりも上流側に位置する。In particular, when the armature (4) rotates in a predetermined direction, the electric motor (20) that is the rotating electrical machine according to the second embodiment of the present invention has a pair of second side portions ( In each of 17), an upstream end 18 a which is an end having a width L 1 wider than the substantially central portion 19 is located on the upstream side of the substantially central portion 19.

本実施の形態２において、所定方向とは、図中、矢印でしめすように、反時計回りをいう。In the second embodiment, the predetermined direction means counterclockwise as indicated by an arrow in the figure.

また、本発明の実施の形態２における回転電機である電動機（２０）では、一対の第２辺部（１７）のそれぞれは、略中央部１９において、電機子（４）と向い合う内面が電機子（４）の反対側に向かって窪んでいる。Further, in the electric motor (20) that is the rotating electric machine according to the second embodiment of the present invention, each of the pair of second side parts (17) has an inner surface facing the armature (4) at the substantially central part 19. It is depressed toward the opposite side of the child (4).

また、本発明の実施の形態２における回転電機である電動機（２０）では、一対の第２辺部（１７）のそれぞれは、略中央部１９からそれぞれの端部１８ａ、１８ｂに向かって傾斜を有する傾斜面を含む。In the electric motor (20) that is the rotating electrical machine according to the second embodiment of the present invention, each of the pair of second side portions (17) is inclined from the substantially central portion 19 toward the respective end portions 18a and 18b. Including an inclined surface.

図面を用いて、さらに詳細に説明する。図３に示すように、本実施の形態２において、電機子（４）は、反時計回りに回転する。電機子（４）の回転方向（図中の矢印方向）の上流側（図の上側）に位置する端部は、上流側端部１８ａである。同様に、電機子（４）の回転方向（図中の矢印方向）の下流側（図の下側）に位置する端部は、下流側端部１８ｂである。 Further details will be described with reference to the drawings. As shown in FIG. 3, in the second embodiment, the armature (4) rotates counterclockwise. An end located on the upstream side (upper side in the figure ) of the armature ( 4 ) in the rotation direction (the arrow direction in the figure) is an upstream end part 18 a . Similarly, the end located on the downstream side (lower side in the figure) of the armature (4) in the rotation direction (the arrow direction in the figure) is the downstream end part 18b.

界磁鉄心（６）には、第２辺部（１７）の上流側端部１８ａの幅Ｌ１に対して、略中央部１９の幅Ｌ２が小さくなるように、第２辺部（１７）の内周側に傾斜が設けられる。一方、界磁鉄心（６）において、第２辺部（１７）の略中央部１９の幅Ｌ２と、他方の端部である、第２辺部（１７）の下流側端部１８ｂの幅Ｌ３とは、略同等としている。 The field core (6), with respect to width L1 of the upstream end portion 18a of the second side portion (17), so that the width L2 of the substantially central portion 19 is reduced, the second side portion of (17) An inclination is provided on the inner peripheral side . On the other hand, in the field core (6), the width L2 of the substantially central portion 19 of the second side portion (17), which is the other end portion, the width of the downstream end 18b of the second side portion (17) L3 a, it is substantially equal.

本構成とすれば、上流側端部と略中央部との間において、電機子から発生した磁束が第２辺部をとおる磁気回路を徐々に狭くすることができる。よって、第２辺部における磁気回路は、徐々に磁気抵抗が大きくなるため、電機子反作用の影響を抑制できる。With this configuration, the magnetic circuit in which the magnetic flux generated from the armature passes through the second side portion can be gradually narrowed between the upstream end portion and the substantially central portion. Therefore, the magnetic circuit in the second side portion gradually increases in magnetic resistance, so that the influence of the armature reaction can be suppressed.

一方、第２辺部の略中央部と下流側端部との間では、第２辺部１７における磁束量の変化が回転方向の上流側と比べて少ない。よって、第２辺部の略中央部と下流側端部との間の幅を略同等としても、電機子反作用に大きな影響は与えない。しかしながら、電機子の回転方向と、その反対方向とのスロット形状差を小さくすると、スロット１４内での絶縁紙１５の位置が安定するという効果が得られる。 On the other hand, between the substantially central portion and the downstream end of the second side portion, the change of the magnetic flux amount in the second side portion 17 is smaller than the upstream side in the rotation direction. Therefore, even if the width between the substantially central portion of the second side portion and the downstream end portion is substantially equal, the armature reaction is not greatly affected. However, if the slot shape difference between the rotation direction of the armature and the opposite direction is reduced, an effect that the position of the insulating paper 15 in the slot 14 is stabilized can be obtained.

なお、界磁３の極数は２極に限らず、２極以上の偶数極であればよく、極数に合わせて界磁鉄心を多角形状とすることもできる。   Note that the number of poles of the field 3 is not limited to two but may be an even number of two or more, and the field core may be polygonal in accordance with the number of poles.

本発明の回転電機によれば、小型の界磁鉄心であってもスロット開口部の寸法を確保することができ、巻線作業性を確保することができる。よって、本発明は、発電機や掃除機用の電動送風機など、各種電気機器に広く適用可能である。 According to the rotating electrical machine of the present invention, the size of the slot opening can be ensured even with a small field iron core, and winding workability can be ensured . Therefore , the present invention can be widely applied to various electric devices such as a generator and an electric blower for a vacuum cleaner.

１ 電動送風機
２、１０２ フレーム
３、１０３ 界磁
４、１０４ 電機子
５、１０５ 突極
６、１０６ 界磁鉄心
７、１０７ 界磁巻線
１１ 遠心ファン
１４ スロット
１５ 絶縁紙
１６、１１６ 第１辺部
１７、１１７ 第２辺部
１８ 端部
１８ａ 上流側端部
１８ｂ 下流側端部
１９ 略中央部
２０ 電動機（回転電機） DESCRIPTION OF SYMBOLS 1 Electric blower 2 , 102 Frame 3 , 103 Field magnet 4 , 104 Armature 5 , 105 Salient pole 6 , 106 Field iron core 7 , 107 Field winding
11 Centrifugal Fan 14 Slot 15 Insulating Paper 16 , 116 First Side 17 , 117 Second Side 18 End
18a upstream end
18b downstream end 19 substantially central portion
20 electric motor (rotary electric machine)

Claims (3)

それぞれ突極を内面に有する、一対の第１辺部と、前記一対の第１辺部のそれぞれの端部同士をつなぎ、向い合って位置する一対の第２辺部と、を有する方形筒状の界磁鉄心と、前記突極のそれぞれに巻回された界磁巻線と、を備える界磁と、
前記突極間に配置される電機子と、を具備し、
前記一対の第２辺部のそれぞれは、略中央部の幅（Ｌ２）が最も狭く、
かつ、前記電機子が所定方向に回転するとき、
前記電機子の回転方向において、前記一対の第２辺部のそれぞれは、前記略中央部よりも上流に位置する第１の端部と、前記略中央部よりも下流に位置する第２の端部と、を有し、
前記略中央部の幅（Ｌ２）は、前記第１の端部の幅（Ｌ１）よりも狭く、前記第２の端部の幅（Ｌ３）と実質的に等しい、回転電機。 A rectangular cylindrical shape having a pair of first side portions each having a salient pole on the inner surface, and a pair of second side portions that face each other and connect each end portion of the pair of first side portions. A field iron core and a field winding wound around each of the salient poles,
An armature disposed between the salient poles,
Wherein each of the pair of second side portions, rather narrowest is substantially central portion of the width (L2),
And when the armature rotates in a predetermined direction,
In the rotational direction of the armature, each of the pair of second sides is a first end located upstream from the substantially central portion and a second end located downstream from the substantially central portion. And
A rotating electrical machine in which a width (L2) of the substantially central portion is narrower than a width (L1) of the first end portion and is substantially equal to a width (L3) of the second end portion . 前記一対の第２辺部のそれぞれは、前記略中央部において、前記電機子と向い合う内面が前記電機子の反対側に向かって窪み、前記第１の端部から前記略中央部に向かって傾斜を有する傾斜面を含む、請求項１に記載の回転電機。 Each of the second side portion of the pair, in the substantially central portion, seen recess inner surface facing said armature toward the opposite side of the armature, toward the substantially central portion from said first end portion The rotating electrical machine according to claim 1, further comprising an inclined surface having an inclination . 請求項１または請求項２に記載の回転電機と、遠心ファンと、を備えた電動送風機。 An electric blower comprising the rotating electric machine according to claim 1 or 2 and a centrifugal fan.
JP2015024895A 2015-02-12 2015-02-12 Rotating electric machine and electric blower provided with the same Active JP6578506B2 (en)

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