WO2021250735A1 - Electric motor and blowing device - Google Patents

Electric motor and blowing device Download PDF

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Publication number
WO2021250735A1
WO2021250735A1 PCT/JP2020/022509 JP2020022509W WO2021250735A1 WO 2021250735 A1 WO2021250735 A1 WO 2021250735A1 JP 2020022509 W JP2020022509 W JP 2020022509W WO 2021250735 A1 WO2021250735 A1 WO 2021250735A1
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WO
WIPO (PCT)
Prior art keywords
teeth
outer ring
ring yoke
slot
center
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PCT/JP2020/022509
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French (fr)
Japanese (ja)
Inventor
高志 鈴木
正樹 亀山
正弥 後藤
学 出口
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2020/022509 priority Critical patent/WO2021250735A1/en
Priority to JP2022530361A priority patent/JPWO2021250735A1/ja
Publication of WO2021250735A1 publication Critical patent/WO2021250735A1/en

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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings

Definitions

  • This disclosure relates to an inner rotor type motor and a blower using the same.
  • the coil placed on the stator core of the motor is required to have a short circumference in order to achieve high efficiency and low cost.
  • the coil In a general single-phase induction type motor, the coil is inserted later into the stator core in which the teeth and yoke are integrated, so it is necessary to allow a margin in the circumference of the coil. Therefore, the coil end, which is a portion where the coil protrudes from the slot in the axial direction of the motor and does not contribute to the output of the motor, becomes high, which hinders high efficiency and low cost.
  • Patent Document 1 discloses an electric motor in which a stator core is divided into an outer ring yoke portion and a teeth portion forming an outer ring portion, and a coil is directly wound around a winding frame in which an insulating resin is assembled to the teeth portion.
  • the electric motor disclosed in Patent Document 1 by arranging a winding frame that covers up to the end face of the rotor, the coil to be wound first is directly wound around the winding frame so as to project on the end face of the rotor. Therefore, in the motor disclosed in Patent Document 1, the coil can be directly wound in the slot of the coil to be wound later without being interfered with by the coil to be wound first.
  • the coil end can be lowered and the circumference of the coil can be shortened.
  • the present disclosure has been made in view of the above, and an object thereof is to obtain an electric motor having a low coil end and high assembly accuracy of a stator core.
  • the motor according to the present disclosure includes a stator and a rotor arranged inside the stator.
  • the stator includes an annular outer ring yoke portion and a plurality of teeth portions protruding toward the center from the inner peripheral surface of the outer ring yoke portion, and a stator core in which a slot is formed between adjacent tooth portions. And an inner diameter side coil arranged in the slot, and an outer diameter side coil arranged on the outer ring yoke portion side with respect to the inner diameter side coil.
  • the plurality of teeth parts are a first teas part, a second teas part arranged next to the first teas part, a third teas part arranged next to the second teas part, and a first Includes a fourth teeth section located next to the third teeth section.
  • the first teeth portion, the second teeth portion, the third teeth portion and the fourth teeth portion are periodically arranged in this order.
  • the first teeth portion and the third teeth portion include a connecting portion with the outer ring yoke portion on radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth.
  • the second teeth portion is located closer to the first teeth portion than the intersection of the radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth and the outer ring yoke portion at the connecting portion with the outer ring yoke portion. do.
  • the connecting portion with the outer ring yoke portion is separated from the third teeth portion by the intersection of the radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth and the outer ring yoke portion. ..
  • the inner diameter side coil is arranged in the first slot on both sides of the first tooth portion, straddling the second slots on both sides of the third tooth portion.
  • the outer diameter side coil is arranged in the second slot so as to straddle the first slot.
  • the motor according to the present disclosure has the effect of having a low coil end and high assembly accuracy of the stator core.
  • FIG. 1 An exploded perspective view of the electric motor according to the first embodiment.
  • Top view of the stator core of the motor according to the first embodiment The figure which shows the shape of the slot of the stator core of the electric motor which concerns on Embodiment 1.
  • the figure which shows the stator core of the electric motor which concerns on the modification of Embodiment 1. Rear view of a ventilation fan equipped with an electric motor according to the first embodiment.
  • FIG. 1 is an exploded perspective view of the electric motor according to the first embodiment.
  • FIG. 2 is a perspective view of the stator of the motor according to the first embodiment.
  • the motor is an inner rotor type induction motor.
  • the electric motor 20 includes an annular stator 1, a rotor 2 installed inside the stator 1, a bearing 3 fitted to the shaft of the rotor 2, a frame 4 and a bracket 5 for supporting the bearing 3. Be prepared.
  • the stator 1 and the rotor 2 are housed in the outer shell formed by the frame 4 and the bracket 5.
  • the stator 1 includes a stator core 6 to which the teeth portion 10 and the outer ring yoke portion 9 are assembled, an insulating resin 8 attached to the teeth portions 10 from both sides in the axial direction, an inner diameter side coil 7a, and an outer diameter side coil 7b. And have.
  • the outer ring yoke portion 9 and the teeth portion 10 are formed by laminating a plurality of electrical steel sheets.
  • FIG. 3 is a plan view of the stator core of the motor according to the first embodiment.
  • the teeth portion 10 has a first teeth portion 10a having a connecting portion 91 with the outer ring yoke portion 9 on radiation passing through the center O of the outer ring yoke portion 9 and the center Ca of the width at the tip of the teeth. Further, in the teeth portion 10, the connecting portion 91 with the outer ring yoke portion 9 is first than the intersection D between the radiation passing through the center O of the outer ring yoke portion 9 and the center Cb of the width at the tip of the teeth and the outer ring yoke portion 9. It has a second tooth portion 10b located near the tooth portion 10a of the above.
  • the teeth portion 10 has a third teeth portion 10c having a connecting portion 91 with the outer ring yoke portion 9 on radiation passing through the center O of the outer ring yoke portion 9 and the center Cc of the width at the tip of the teeth.
  • the connecting portion 91 with the outer ring yoke portion 9 is third than the intersection E between the radiation passing through the center O of the outer ring yoke portion 9 and the center Cd of the width at the tip of the teeth and the outer ring yoke portion 9. It has a fourth teeth portion 10d that is separated from the teeth portion 10c of the above.
  • the teeth portion 10 is the first teeth portion 10a, the second teeth portion 10b arranged next to the first teeth portion 10a, and the third teeth portion 10b arranged next to the second teeth portion 10b. It includes a teeth portion 10c and a fourth teeth portion 10d arranged next to the third teeth portion 10c.
  • the distance L1 between the connecting portion 91 of the second teeth portion 10b and the first teeth portion 10a is shorter than the distance between the intersection D and the first teeth portion 10a.
  • the distance L3 between the connecting portion 91 of the fourth teeth portion 10d and the third teeth portion 10c is longer than the distance L4 between the intersection E and the third teeth portion 10c.
  • the first teeth portion 10a, the second teeth portion 10b, the third teeth portion 10c, and the fourth teeth portion 10d are periodically arranged in this order.
  • the connecting portion 91 of the second tooth portion 10b and the fourth tooth portion 10d on both sides thereof with the outer ring yoke portion 9 is the outer ring yoke portion 9. It is located closer to the first teeth portion 10a than the intersections D and E of the radiation passing through the center Cb and Cd of the width at the center O and the tip of the teeth and the outer ring yoke portion 9.
  • the connecting portion 91 of the second tooth portion 10b and the fourth tooth portion 10d on both sides thereof with the outer ring yoke portion 9 is the center O of the outer ring yoke portion 9. And, it is far from the third tooth portion 10c from the intersections D and E of the radiation passing through the central Cb and Cd of the width at the tip of the tooth and the outer ring yoke portion 9.
  • FIG. 4 is a diagram showing the shape of the slot of the stator core of the motor according to the first embodiment.
  • the size is different between the first slot 12, which is the slot on both sides of the first tooth portion 10a, and the second slot 13, which is the slot on both sides of the third tooth portion 10c.
  • the first slots 12 on both sides of the first teeth portion 10a are line-symmetrical to each other, and the second slots 13 on both sides of the third teeth portion 10c are line-symmetrical to each other. be.
  • the width Wo2 of the second slot 13 is larger than the width Wo1 of the first slot 12 on the root side of the teeth portion 10.
  • the width Wi2 of the second slot 13 is smaller than the width Wi1 of the first slot 12 on the tip end side of the teeth portion 10.
  • FIG. 5 is a diagram showing the shape of the coil of the electric motor according to the first embodiment.
  • the inner diameter side coil 7a and the outer diameter side coil 7b are shown one by one, and the other inner diameter side coil 7a and the outer diameter side coil 7b are not shown.
  • the inner diameter side coil 7a is arranged in the first slot 12. Since the inner diameter side coil 7a straddles the second slot 13, the portion of the second slot 13 near the slot open is closed by the inner diameter side coil 7a.
  • the outer diameter side coil 7b is arranged in the second slot 13 so as to straddle the first slot 12.
  • the inner diameter side coil 7a is arranged near the slot open of the first slot 12, and the outer diameter side coil 7b is located in the second slot 13 closer to the outer ring yoke portion 9 than the inner diameter side coil 7a. Have been placed.
  • FIG. 6 is a diagram showing a stator core in which the inner diameter side coil of the motor according to the first embodiment is arranged.
  • the width of the second slot 13 in which the portion close to the slot open is closed by the inner diameter side coil 7a is narrow in the portion close to the slot open, and wide in the portion close to the outer ring yoke portion 9. Therefore, in the second slot 13, a large space for arranging the outer diameter side coil 7b can be secured as compared with the slot of the stator core in which all the teeth portions are arranged radially, and the inner diameter side coil 7a can be secured. And the outer diameter side coil 7b can be prevented from interfering with each other.
  • FIG. 7 is a perspective view of the teeth portion, the inner diameter side coil, and the outer diameter side coil of the electric motor according to the first embodiment. Since the rotor 2 is not arranged inside the stator 1 before the teeth portion 10 is assembled to the outer ring yoke portion 9, the teeth portion 10 is held when the outer ring yoke portion 9 and the teeth portion 10 are assembled. The jig can be arranged inside the teeth portion 10. Therefore, the assembly accuracy of the stator core 6 can be improved and electromagnetic noise can be suppressed. Further, in the electric motor 20 according to the first embodiment, since the slot open of the first slot 12 and the slot open of the second slot 13 are arranged at equal intervals, it is possible to suppress an increase in electromagnetic noise.
  • FIG. 8 is a diagram showing a stator core of an electric motor according to a modified example of the first embodiment.
  • the second teeth portion 10b and the fourth teeth portion 10d are different from the stator core 6 of the motor 20 according to the first embodiment in that they have a crank shape. Since the second teeth portion 10b and the fourth teeth portion 10d are crank-shaped, the difference between the width of the first slot 12 and the width of the second slot 13 is the portion close to the slot open and the outer ring yoke portion 9. It is larger in both parts close to. Therefore, a large space for arranging the outer diameter side coil 7b can be secured in the second slot 13, and the output of the electric motor 20 can be increased.
  • FIG. 9 is a rear view of a ventilation fan equipped with a motor according to the first embodiment.
  • the electric motor 20 according to the first embodiment is used as a power source for rotating the fan 101 of the ventilation fan 100.
  • the electric motor 20 By using the electric motor 20 as the power source for rotating the fan 101 of the ventilation fan 100, it is possible to increase the air volume and the wind pressure and reduce the noise.
  • the ventilation fan 100 provided with the electric motor 20 has been described here, the electric motor 20 is not limited to the ventilation fan 100 and can be used for all blower devices such as a blower and a circulator.
  • the configuration shown in the above embodiment is an example of the content, can be combined with another known technique, and a part of the configuration is omitted or changed without departing from the gist. It is also possible.
  • stator 1 stator, 2 rotor, 3 bearing, 4 frame, 5 bracket, 6 stator core, 7a inner diameter side coil, 7b outer diameter side coil, 8 insulation resin, 9 outer ring yoke part, 10 teeth part, 10a first Teeth part, 10b second teas part, 10c third teas part, 10d fourth teeth part, 12 first slot, 13 second slot, 20 electric motor, 91 connection part, 100 ventilation fan, 101 fan.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

This electric motor comprises: a stator that has an annular outer ring yoke (9) and a plurality of teeth (10); and a rotor that is positioned inside the stator. The teeth (10) include first teeth (10a), second teeth (10b), third teeth (10c), and fourth teeth (10d). The first teeth (10a) and the third teeth (10c) each have a connecting section (91) on a radiating line that passes through the center of the outer ring yoke (9) and the widthwise middle of the tooth tip end. The second teeth (10b) each have a connecting section (91) that is located closer to first tooth (10a) than the point where the outer ring yoke (9) intersects a radiating line that passes through the center of the outer ring yoke (9) and the widthwise middle of the tooth tip end. The fourth teeth (10d) each have a connecting section (91) that is farther away from a third tooth (10c) than the point where the outer ring yoke (9) intersects a radiating line that passes through the center of the outer ring yoke (9) and the widthwise middle of the tooth tip end.

Description

電動機及び送風装置Motor and blower
　本開示は、インナーロータ型の電動機及びこれを用いた送風装置に関する。 This disclosure relates to an inner rotor type motor and a blower using the same.
　電動機の固定子鉄心に配置されているコイルは、高効率化及び低コスト化を実現するために、周長を短くすることが求められている。 The coil placed on the stator core of the motor is required to have a short circumference in order to achieve high efficiency and low cost.
　一般的な単相誘導型の電動機は、ティースとヨークとが一体の固定子鉄心にコイルを後入れするため、コイルの周長に余裕を持たせる必要がある。したがって、コイルが電動機の軸方向にスロットからはみ出す部分であり電動機の出力に寄与しないコイルエンドが高くなり、高効率化及び低コスト化の妨げとなる。 In a general single-phase induction type motor, the coil is inserted later into the stator core in which the teeth and yoke are integrated, so it is necessary to allow a margin in the circumference of the coil. Therefore, the coil end, which is a portion where the coil protrudes from the slot in the axial direction of the motor and does not contribute to the output of the motor, becomes high, which hinders high efficiency and low cost.
　特許文献１には、固定子鉄心を、外輪部を形成する外輪ヨーク部とティース部とに分割し、ティース部に絶縁樹脂を組み付けた巻枠にコイルを直接巻き付ける電動機が開示されている。特許文献１に開示される電動機は、回転子の端面まで覆う巻枠を配置することで、最初に巻くコイルを回転子の端面上に張り出すように巻枠に直接巻き付ける。したがって、特許文献１に開示される電動機では、後に巻くコイルのスロットには、最初に巻くコイルに干渉されることなく、コイルを直接巻き付けることができる。特許文献１に開示される電動機は、巻枠に直接コイルを巻き付けるため、コイルエンドを低くし、コイルの周長を短くできる。 Patent Document 1 discloses an electric motor in which a stator core is divided into an outer ring yoke portion and a teeth portion forming an outer ring portion, and a coil is directly wound around a winding frame in which an insulating resin is assembled to the teeth portion. In the electric motor disclosed in Patent Document 1, by arranging a winding frame that covers up to the end face of the rotor, the coil to be wound first is directly wound around the winding frame so as to project on the end face of the rotor. Therefore, in the motor disclosed in Patent Document 1, the coil can be directly wound in the slot of the coil to be wound later without being interfered with by the coil to be wound first. In the motor disclosed in Patent Document 1, since the coil is wound directly around the winding frame, the coil end can be lowered and the circumference of the coil can be shortened.
特許第３１０２６６５号公報Japanese Patent No. 3102665
　しかしながら、上記特許文献１に開示される電動機は、回転子の端面上に張り出すようにコイルが配置されるため、巻枠にコイルを巻き付ける前に回転子を配置する必要がある。このため、外輪ヨーク部とティース部とを組み付ける際にティース部を保持する治具を配置できず、固定子鉄心の組立精度を高めることが困難であり、固定子鉄心がいびつであることによって電磁騒音が増大してしまうという問題があった。 However, in the motor disclosed in Patent Document 1, since the coil is arranged so as to project on the end face of the rotor, it is necessary to arrange the rotor before winding the coil around the winding frame. For this reason, when assembling the outer ring yoke portion and the teeth portion, it is not possible to arrange a jig for holding the teeth portion, and it is difficult to improve the assembly accuracy of the stator core. There was a problem that the noise increased.
　本開示は、上記に鑑みてなされたものであって、コイルエンドが低く、固定子鉄心の組立精度が高い電動機を得ることを目的とする。 The present disclosure has been made in view of the above, and an object thereof is to obtain an electric motor having a low coil end and high assembly accuracy of a stator core.
　上述した課題を解決し、目的を達成するために、本開示に係る電動機は、固定子と、固定子の内側に配置される回転子とを備える。固定子は、環状の外輪ヨーク部と、外輪ヨーク部の内周面から中心方向に突出する複数のティース部とを備え、隣り合うティース部同士の間のそれぞれにスロットが形成された固定子鉄心と、スロットに配置される内径側コイルと、内径側コイルよりも外輪ヨーク部側に配置される外径側コイルとを備える。複数のティース部は、第一のティース部と、第一のティース部の隣りに配される第二のティース部と、第二のティース部の隣りに配される第三のティース部と、第三のティース部の隣りに配される第四のティース部とを含む。第一のティース部、第二のティース部、第三のティース部及び第四のティース部は、この順で周期的に配置されている。第一のティース部及び第三のティース部は、外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線上に外輪ヨーク部との連結部を備える。第二のティース部は、外輪ヨーク部との連結部が、外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線と外輪ヨーク部との交点よりも第一のティース部の近くに位置する。第四のティース部は、外輪ヨーク部との連結部が、外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線と外輪ヨーク部との交点よりも第三のティース部から離れている。スロットのうち、第一のティース部の両脇の第一のスロットに、第三のティース部の両脇の第二のスロットを跨いで内径側コイルが配置される。スロットのうち、第二のスロットに、第一のスロットを跨いで外径側コイルが配置される。 In order to solve the above-mentioned problems and achieve the object, the motor according to the present disclosure includes a stator and a rotor arranged inside the stator. The stator includes an annular outer ring yoke portion and a plurality of teeth portions protruding toward the center from the inner peripheral surface of the outer ring yoke portion, and a stator core in which a slot is formed between adjacent tooth portions. And an inner diameter side coil arranged in the slot, and an outer diameter side coil arranged on the outer ring yoke portion side with respect to the inner diameter side coil. The plurality of teeth parts are a first teas part, a second teas part arranged next to the first teas part, a third teas part arranged next to the second teas part, and a first Includes a fourth teeth section located next to the third teeth section. The first teeth portion, the second teeth portion, the third teeth portion and the fourth teeth portion are periodically arranged in this order. The first teeth portion and the third teeth portion include a connecting portion with the outer ring yoke portion on radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth. The second teeth portion is located closer to the first teeth portion than the intersection of the radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth and the outer ring yoke portion at the connecting portion with the outer ring yoke portion. do. In the fourth teeth portion, the connecting portion with the outer ring yoke portion is separated from the third teeth portion by the intersection of the radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth and the outer ring yoke portion. .. Among the slots, the inner diameter side coil is arranged in the first slot on both sides of the first tooth portion, straddling the second slots on both sides of the third tooth portion. Of the slots, the outer diameter side coil is arranged in the second slot so as to straddle the first slot.
　本開示に係る電動機は、コイルエンドが低く、固定子鉄心の組立精度が高いという効果を奏する。 The motor according to the present disclosure has the effect of having a low coil end and high assembly accuracy of the stator core.
実施の形態１に係る電動機の分解斜視図An exploded perspective view of the electric motor according to the first embodiment. 実施の形態１に係る電動機の固定子の斜視図Perspective view of the stator of the motor according to the first embodiment. 実施の形態１に係る電動機の固定子鉄心の平面図Top view of the stator core of the motor according to the first embodiment 実施の形態１に係る電動機の固定子鉄心のスロットの形状を示す図The figure which shows the shape of the slot of the stator core of the electric motor which concerns on Embodiment 1. 実施の形態１に係る電動機のコイルの形状を示す図The figure which shows the shape of the coil of the electric motor which concerns on Embodiment 1. 実施の形態１に係る電動機の内径側コイルを配置済の固定子鉄心を示す図The figure which shows the stator core in which the inner diameter side coil of the electric motor which concerns on Embodiment 1 is arranged. 実施の形態１に係る電動機のティース部、内径側コイル及び外径側コイルの斜視図Perspective view of the tooth portion, the inner diameter side coil and the outer diameter side coil of the electric motor according to the first embodiment. 実施の形態１の変形例に係る電動機の固定子鉄心を示す図The figure which shows the stator core of the electric motor which concerns on the modification of Embodiment 1. 実施の形態１に係る電動機を搭載した換気扇の背面図Rear view of a ventilation fan equipped with an electric motor according to the first embodiment.
　以下に、実施の形態に係る電動機及び送風装置を図面に基づいて詳細に説明する。 The electric motor and the blower according to the embodiment will be described in detail below based on the drawings.
実施の形態１．
　図１は、実施の形態１に係る電動機の分解斜視図である。図２は、実施の形態１に係る電動機の固定子の斜視図である。電動機は、インナーロータ型の誘導電動機である。電動機２０は、環状の固定子１と、固定子１の内側に設置される回転子２と、回転子２のシャフトに嵌め込まれた軸受３と、軸受３を支持するフレーム４及びブラケット５とを備える。固定子１及び回転子２は、フレーム４及びブラケット５がなす外郭の中に収容される。 Embodiment 1.
FIG. 1 is an exploded perspective view of the electric motor according to the first embodiment. FIG. 2 is a perspective view of the stator of the motor according to the first embodiment. The motor is an inner rotor type induction motor. The electric motor 20 includes an annular stator 1, a rotor 2 installed inside the stator 1, a bearing 3 fitted to the shaft of the rotor 2, a frame 4 and a bracket 5 for supporting the bearing 3. Be prepared. The stator 1 and the rotor 2 are housed in the outer shell formed by the frame 4 and the bracket 5.
　固定子１は、ティース部１０と外輪ヨーク部９とが組み付けられた固定子鉄心６と、ティース部１０に軸方向両側から取り付けられた絶縁樹脂８と、内径側コイル７ａと外径側コイル７ｂとを有する。外輪ヨーク部９及びティース部１０は、複数枚の電磁鋼板を積層して形成されている。 The stator 1 includes a stator core 6 to which the teeth portion 10 and the outer ring yoke portion 9 are assembled, an insulating resin 8 attached to the teeth portions 10 from both sides in the axial direction, an inner diameter side coil 7a, and an outer diameter side coil 7b. And have. The outer ring yoke portion 9 and the teeth portion 10 are formed by laminating a plurality of electrical steel sheets.
　図３は、実施の形態１に係る電動機の固定子鉄心の平面図である。ティース部１０は、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃａを通る放射線上に外輪ヨーク部９との連結部９１を有する第一のティース部１０ａを有する。また、ティース部１０は、外輪ヨーク部９との連結部９１が、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃｂを通る放射線と外輪ヨーク部９との交点Ｄよりも第一のティース部１０ａの近くに位置する第二のティース部１０ｂを有する。また、ティース部１０は、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃｃを通る放射線上に外輪ヨーク部９との連結部９１を有する第三のティース部１０ｃを有する。また、ティース部１０は、外輪ヨーク部９との連結部９１が、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃｄを通る放射線と外輪ヨーク部９との交点Ｅよりも第三のティース部１０ｃから離れている第四のティース部１０ｄを有する。すなわち、ティース部１０は、第一のティース部１０ａと、第一のティース部１０ａの隣りに配される第二のティース部１０ｂと、第二のティース部１０ｂの隣りに配される第三のティース部１０ｃと、第三のティース部１０ｃの隣りに配される第四のティース部１０ｄとを含む。第二のティース部１０ｂの連結部９１と第一のティース部１０ａとの距離Ｌ１は、交点Ｄと第一のティース部１０ａとの距離よりも短い。第四のティース部１０ｄの連結部９１と第三のティース部１０ｃとの距離Ｌ３は、交点Ｅと第三のティース部１０ｃとの距離Ｌ４よりも長い。第一のティース部１０ａ、第二のティース部１０ｂ、第三のティース部１０ｃ及び第四のティース部１０ｄは、この順で周期的に配置されている。 FIG. 3 is a plan view of the stator core of the motor according to the first embodiment. The teeth portion 10 has a first teeth portion 10a having a connecting portion 91 with the outer ring yoke portion 9 on radiation passing through the center O of the outer ring yoke portion 9 and the center Ca of the width at the tip of the teeth. Further, in the teeth portion 10, the connecting portion 91 with the outer ring yoke portion 9 is first than the intersection D between the radiation passing through the center O of the outer ring yoke portion 9 and the center Cb of the width at the tip of the teeth and the outer ring yoke portion 9. It has a second tooth portion 10b located near the tooth portion 10a of the above. Further, the teeth portion 10 has a third teeth portion 10c having a connecting portion 91 with the outer ring yoke portion 9 on radiation passing through the center O of the outer ring yoke portion 9 and the center Cc of the width at the tip of the teeth. Further, in the teeth portion 10, the connecting portion 91 with the outer ring yoke portion 9 is third than the intersection E between the radiation passing through the center O of the outer ring yoke portion 9 and the center Cd of the width at the tip of the teeth and the outer ring yoke portion 9. It has a fourth teeth portion 10d that is separated from the teeth portion 10c of the above. That is, the teeth portion 10 is the first teeth portion 10a, the second teeth portion 10b arranged next to the first teeth portion 10a, and the third teeth portion 10b arranged next to the second teeth portion 10b. It includes a teeth portion 10c and a fourth teeth portion 10d arranged next to the third teeth portion 10c. The distance L1 between the connecting portion 91 of the second teeth portion 10b and the first teeth portion 10a is shorter than the distance between the intersection D and the first teeth portion 10a. The distance L3 between the connecting portion 91 of the fourth teeth portion 10d and the third teeth portion 10c is longer than the distance L4 between the intersection E and the third teeth portion 10c. The first teeth portion 10a, the second teeth portion 10b, the third teeth portion 10c, and the fourth teeth portion 10d are periodically arranged in this order.
　したがって、第一のティース部１０ａの一つを基準としたとき、その両側にある第二のティース部１０ｂ及び第四のティース部１０ｄの外輪ヨーク部９との連結部９１は、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃｂ，Ｃｄを通る放射線と外輪ヨーク部９との交点Ｄ，Ｅよりも第一のティース部１０ａの近くに位置している。一方、第三のティース部１０ｃを基準としたとき、その両側にある第二のティース部１０ｂ及び第四のティース部１０ｄの外輪ヨーク部９との連結部９１は、外輪ヨーク部９の中心Ｏ及びティース先端での幅の中央Ｃｂ，Ｃｄを通る放射線と外輪ヨーク部９との交点Ｄ，Ｅよりも第三のティース部１０ｃから離れている。 Therefore, when one of the first tooth portions 10a is used as a reference, the connecting portion 91 of the second tooth portion 10b and the fourth tooth portion 10d on both sides thereof with the outer ring yoke portion 9 is the outer ring yoke portion 9. It is located closer to the first teeth portion 10a than the intersections D and E of the radiation passing through the center Cb and Cd of the width at the center O and the tip of the teeth and the outer ring yoke portion 9. On the other hand, when the third tooth portion 10c is used as a reference, the connecting portion 91 of the second tooth portion 10b and the fourth tooth portion 10d on both sides thereof with the outer ring yoke portion 9 is the center O of the outer ring yoke portion 9. And, it is far from the third tooth portion 10c from the intersections D and E of the radiation passing through the central Cb and Cd of the width at the tip of the tooth and the outer ring yoke portion 9.
　図４は、実施の形態１に係る電動機の固定子鉄心のスロットの形状を示す図である。第一のティース部１０ａの両脇のスロットである第一のスロット１２と、第三のティース部１０ｃの両脇のスロットである第二のスロット１３とで、大きさが異なっている。なお、第一のティース部１０ａの両脇の第一のスロット１２同士は、互いに線対称形状であり、第三のティース部１０ｃの両脇の第二のスロット１３同士は、互いに線対称形状である。固定子鉄心６は、ティース部１０の根元側では、第一のスロット１２の幅Ｗｏ１よりも第二のスロット１３の幅Ｗｏ２の方が大きくなっている。また、固定子鉄心６は、ティース部１０の先端側では、第一のスロット１２の幅Ｗｉ１よりも第二のスロット１３の幅Ｗｉ２の方が小さくなっている。 FIG. 4 is a diagram showing the shape of the slot of the stator core of the motor according to the first embodiment. The size is different between the first slot 12, which is the slot on both sides of the first tooth portion 10a, and the second slot 13, which is the slot on both sides of the third tooth portion 10c. The first slots 12 on both sides of the first teeth portion 10a are line-symmetrical to each other, and the second slots 13 on both sides of the third teeth portion 10c are line-symmetrical to each other. be. In the stator core 6, the width Wo2 of the second slot 13 is larger than the width Wo1 of the first slot 12 on the root side of the teeth portion 10. Further, in the stator core 6, the width Wi2 of the second slot 13 is smaller than the width Wi1 of the first slot 12 on the tip end side of the teeth portion 10.
　図５は、実施の形態１に係る電動機のコイルの形状を示す図である。図５には、内径側コイル７ａ及び外径側コイル７ｂを一つずつ示し、他の内径側コイル７ａ及び外径側コイル７ｂの図示は省略している。内径側コイル７ａは、第一のスロット１２に配置される。内径側コイル７ａは、第二のスロット１３を跨ぐため、第二のスロット１３のうちスロットオープンに近い部分は、内径側コイル７ａで塞がれる。外径側コイル７ｂは、第一のスロット１２を跨いで第二のスロット１３に配置されている。内径側コイル７ａは、第一のスロット１２のスロットオープン付近に配置されており、外径側コイル７ｂは、第二のスロット１３のうち、内径側コイル７ａよりも外輪ヨーク部９に近い部分に配置されている。 FIG. 5 is a diagram showing the shape of the coil of the electric motor according to the first embodiment. In FIG. 5, the inner diameter side coil 7a and the outer diameter side coil 7b are shown one by one, and the other inner diameter side coil 7a and the outer diameter side coil 7b are not shown. The inner diameter side coil 7a is arranged in the first slot 12. Since the inner diameter side coil 7a straddles the second slot 13, the portion of the second slot 13 near the slot open is closed by the inner diameter side coil 7a. The outer diameter side coil 7b is arranged in the second slot 13 so as to straddle the first slot 12. The inner diameter side coil 7a is arranged near the slot open of the first slot 12, and the outer diameter side coil 7b is located in the second slot 13 closer to the outer ring yoke portion 9 than the inner diameter side coil 7a. Have been placed.
　図６は、実施の形態１に係る電動機の内径側コイルを配置済の固定子鉄心を示す図である。内径側コイル７ａによってスロットオープンに近い部分が塞がれる第二のスロット１３は、スロットオープンに近い部分では幅が狭くなっており、外輪ヨーク部９に近い部分では幅が広くなっている。したがって、第二のスロット１３には、全てのティース部が放射状に配置される固定子鉄心のスロットと比較すると、外径側コイル７ｂを配置するスペースを大きく確保することができ、内径側コイル７ａと外径側コイル７ｂとの干渉を防ぐことができる。 FIG. 6 is a diagram showing a stator core in which the inner diameter side coil of the motor according to the first embodiment is arranged. The width of the second slot 13 in which the portion close to the slot open is closed by the inner diameter side coil 7a is narrow in the portion close to the slot open, and wide in the portion close to the outer ring yoke portion 9. Therefore, in the second slot 13, a large space for arranging the outer diameter side coil 7b can be secured as compared with the slot of the stator core in which all the teeth portions are arranged radially, and the inner diameter side coil 7a can be secured. And the outer diameter side coil 7b can be prevented from interfering with each other.
　図７は、実施の形態１に係る電動機のティース部、内径側コイル及び外径側コイルの斜視図である。ティース部１０を外輪ヨーク部９に組み付ける前の状態では、固定子１の内側には回転子２は配置されないため、外輪ヨーク部９とティース部１０とを組み付ける際に、ティース部１０を保持する治具をティース部１０の内側に配置することができる。したがって、固定子鉄心６の組立精度を高め、電磁騒音を抑制することができる。また、実施の形態１に係る電動機２０は、第一のスロット１２のスロットオープン及び第二のスロット１３のスロットオープンが等間隔に配置されるため、電磁騒音が増大することを抑制できる。 FIG. 7 is a perspective view of the teeth portion, the inner diameter side coil, and the outer diameter side coil of the electric motor according to the first embodiment. Since the rotor 2 is not arranged inside the stator 1 before the teeth portion 10 is assembled to the outer ring yoke portion 9, the teeth portion 10 is held when the outer ring yoke portion 9 and the teeth portion 10 are assembled. The jig can be arranged inside the teeth portion 10. Therefore, the assembly accuracy of the stator core 6 can be improved and electromagnetic noise can be suppressed. Further, in the electric motor 20 according to the first embodiment, since the slot open of the first slot 12 and the slot open of the second slot 13 are arranged at equal intervals, it is possible to suppress an increase in electromagnetic noise.
　図８は、実施の形態１の変形例に係る電動機の固定子鉄心を示す図である。ティース部１０のうち第二のティース部１０ｂ及び第四のティース部１０ｄが、クランク状になっている点で実施の形態１に係る電動機２０の固定子鉄心６と相違する。第二のティース部１０ｂ及び第四のティース部１０ｄがクランク状であるため、第一のスロット１２の幅と第二のスロット１３の幅との差は、スロットオープンに近い部分及び外輪ヨーク部９に近い部分の両方でより大きくなっている。したがって、第二のスロット１３には、外径側コイル７ｂを配置するスペースを大きく確保することができ、電動機２０の高出力化を図れる。 FIG. 8 is a diagram showing a stator core of an electric motor according to a modified example of the first embodiment. Of the teeth portions 10, the second teeth portion 10b and the fourth teeth portion 10d are different from the stator core 6 of the motor 20 according to the first embodiment in that they have a crank shape. Since the second teeth portion 10b and the fourth teeth portion 10d are crank-shaped, the difference between the width of the first slot 12 and the width of the second slot 13 is the portion close to the slot open and the outer ring yoke portion 9. It is larger in both parts close to. Therefore, a large space for arranging the outer diameter side coil 7b can be secured in the second slot 13, and the output of the electric motor 20 can be increased.
　図９は、実施の形態１に係る電動機を搭載した換気扇の背面図である。実施の形態１に係る電動機２０は、換気扇１００のファン１０１を回転させる動力源に用いられている。換気扇１００のファン１０１を回転させる動力源に電動機２０を用いることで、風量及び風圧の増大及び低騒音化を実現できる。 FIG. 9 is a rear view of a ventilation fan equipped with a motor according to the first embodiment. The electric motor 20 according to the first embodiment is used as a power source for rotating the fan 101 of the ventilation fan 100. By using the electric motor 20 as the power source for rotating the fan 101 of the ventilation fan 100, it is possible to increase the air volume and the wind pressure and reduce the noise.
　なお、ここでは、電動機２０を備えた換気扇１００について説明したが、電動機２０は、換気扇１００に限定されることなく、送風機及びサーキュレータといった送風装置全般に用いることが可能である。 Although the ventilation fan 100 provided with the electric motor 20 has been described here, the electric motor 20 is not limited to the ventilation fan 100 and can be used for all blower devices such as a blower and a circulator.
　以上の実施の形態に示した構成は、内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration shown in the above embodiment is an example of the content, can be combined with another known technique, and a part of the configuration is omitted or changed without departing from the gist. It is also possible.
　１　固定子、２　回転子、３　軸受、４　フレーム、５　ブラケット、６　固定子鉄心、７ａ　内径側コイル、７ｂ　外径側コイル、８　絶縁樹脂、９　外輪ヨーク部、１０　ティース部、１０ａ　第一のティース部、１０ｂ　第二のティース部、１０ｃ　第三のティース部、１０ｄ　第四のティース部、１２　第一のスロット、１３　第二のスロット、２０　電動機、９１　連結部、１００　換気扇、１０１　ファン。 1 stator, 2 rotor, 3 bearing, 4 frame, 5 bracket, 6 stator core, 7a inner diameter side coil, 7b outer diameter side coil, 8 insulation resin, 9 outer ring yoke part, 10 teeth part, 10a first Teeth part, 10b second teas part, 10c third teas part, 10d fourth teeth part, 12 first slot, 13 second slot, 20 electric motor, 91 connection part, 100 ventilation fan, 101 fan.

Claims (4)

  1. 　固定子と、前記固定子の内側に配置される回転子とを備え、
    　前記固定子は、環状の外輪ヨーク部と、前記外輪ヨーク部の内周面から中心方向に突出する複数のティース部とを備え、隣り合う前記ティース部同士の間のそれぞれにスロットが形成された固定子鉄心と、前記スロットに配置される内径側コイルと、前記内径側コイルよりも前記外輪ヨーク部側に配置される外径側コイルとを備え、
    　複数の前記ティース部は、第一のティース部と、前記第一のティース部の隣りに配される第二のティース部と、前記第二のティース部の隣りに配される第三のティース部と、前記第三のティース部の隣りに配される第四のティース部とを含み、前記第一のティース部、前記第二のティース部、前記第三のティース部及び前記第四のティース部は、この順で周期的に配置されており、
    　前記第一のティース部及び前記第三のティース部は、前記外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線上に前記外輪ヨーク部との連結部を備え、
    　前記第二のティース部は、前記外輪ヨーク部との連結部が、前記外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線と前記外輪ヨーク部との交点よりも前記第一のティース部の近くに位置し、
    　前記第四のティース部は、前記外輪ヨーク部との連結部が、前記外輪ヨーク部の中心及びティース先端での幅の中央を通る放射線と前記外輪ヨーク部との交点よりも前記第三のティース部から離れており、
    　前記スロットのうち、前記第一のティース部の両脇の第一のスロットに、前記第三のティース部の両脇の第二のスロットを跨いで前記内径側コイルが配置され、
    　前記スロットのうち、前記第二のスロットに、前記第一のスロットを跨いで前記外径側コイルが配置されることを特徴とする電動機。     A stator and a rotor arranged inside the stator are provided.
    The stator includes an annular outer ring yoke portion and a plurality of teeth portions protruding toward the center from the inner peripheral surface of the outer ring yoke portion, and slots are formed between the adjacent teeth portions. A stator core, an inner diameter side coil arranged in the slot, and an outer diameter side coil arranged on the outer ring yoke portion side of the inner diameter side coil are provided.
    The plurality of the teeth portions include a first teeth portion, a second teeth portion arranged next to the first teeth portion, and a third teeth portion arranged next to the second teeth portion. And a fourth teeth portion arranged next to the third teeth portion, the first teeth portion, the second teeth portion, the third teeth portion and the fourth teeth portion. Are arranged periodically in this order,
    The first teeth portion and the third teeth portion include a connecting portion with the outer ring yoke portion on radiation passing through the center of the outer ring yoke portion and the center of the width at the tip of the teeth.
    In the second teeth portion, the first teeth from the intersection of the radiation and the outer ring yoke portion where the connecting portion with the outer ring yoke portion passes through the center of the outer ring yoke portion and the center of the width at the tip of the teeth. Located near the club,
    In the fourth tooth portion, the third tooth portion from the intersection of the radiation and the outer ring yoke portion where the connecting portion with the outer ring yoke portion passes through the center of the outer ring yoke portion and the center of the width at the tip of the teeth. Away from the club,
    Among the slots, the inner diameter side coil is arranged in the first slot on both sides of the first tooth portion so as to straddle the second slots on both sides of the third tooth portion.
    An electric motor characterized in that the outer diameter side coil is arranged in the second slot of the slots so as to straddle the first slot.
  2. 　前記第一のスロットのスロットオープン及び前記第二のスロットのスロットオープンは、等間隔に配置されていることを特徴とする請求項１に記載の電動機。 The motor according to claim 1, wherein the slot open of the first slot and the slot open of the second slot are arranged at equal intervals.
  3. 　前記第二のティース部及び前記第四のティース部は、クランク状であることを特徴とする請求項１又は２に記載の電動機。 The electric motor according to claim 1 or 2, wherein the second tooth portion and the fourth tooth portion are crank-shaped.
  4. 　請求項１から３のいずれか１項に記載の電動機を備えたことを特徴とする送風装置。 A blower device provided with the motor according to any one of claims 1 to 3.
PCT/JP2020/022509 2020-06-08 2020-06-08 Electric motor and blowing device WO2021250735A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06205557A (en) * 1992-12-28 1994-07-22 Toshiba Corp Stator of rotary electric apparatus
JPH06217476A (en) * 1993-01-13 1994-08-05 Toshiba Corp Stator for electric rotating machine
JP2002176737A (en) * 2000-12-07 2002-06-21 Matsushita Electric Ind Co Ltd Motor and apparatus using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06205557A (en) * 1992-12-28 1994-07-22 Toshiba Corp Stator of rotary electric apparatus
JPH06217476A (en) * 1993-01-13 1994-08-05 Toshiba Corp Stator for electric rotating machine
JP2002176737A (en) * 2000-12-07 2002-06-21 Matsushita Electric Ind Co Ltd Motor and apparatus using the same

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