WO2022249238A1 - Inner rotor electric motor and fan - Google Patents

Inner rotor electric motor and fan Download PDF

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Publication number
WO2022249238A1
WO2022249238A1 PCT/JP2021/019608 JP2021019608W WO2022249238A1 WO 2022249238 A1 WO2022249238 A1 WO 2022249238A1 JP 2021019608 W JP2021019608 W JP 2021019608W WO 2022249238 A1 WO2022249238 A1 WO 2022249238A1
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WO
WIPO (PCT)
Prior art keywords
core
back portion
electric motor
notch
inner rotor
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PCT/JP2021/019608
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French (fr)
Japanese (ja)
Inventor
達也 山下
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/JP2021/019608 priority Critical patent/WO2022249238A1/en
Priority to JP2023523722A priority patent/JPWO2022249238A1/ja
Publication of WO2022249238A1 publication Critical patent/WO2022249238A1/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

Definitions

  • the present disclosure relates to inner rotor electric motors and blowers.
  • the rotor In the inner rotor type electric motor, the rotor is arranged inside the cylindrical stator.
  • the stator core has a tubular core-back portion and a plurality of tooth portions protruding from an inner peripheral surface of the core-back portion and arranged in a circumferential direction.
  • An insulator is assembled to the teeth to form a winding frame, and a winding is wound around the winding frame.
  • Patent Document 1 a plurality of fitting recesses are formed in the inner wall of an outer ring yoke portion as a core back portion, and a plurality of magnetic pole pieces as tooth portions are press-fitted into the plurality of fitting recesses of the outer ring yoke portion to form a plurality of magnetic pole pieces. The piece is fitted to the outer ring yoke portion.
  • the press-fitting of the magnetic pole piece may deform the outer ring yoke portion, degrading the outer diameter and cylindricity. Further, if the thickness of the outer ring yoke portion is increased, there is a possibility that seizure will occur in the fitting recess due to frictional heat and wear during press fitting. If seizure occurs, the position of the magnetic pole piece will be misaligned, and not only will the inner diameter accuracy of the integrated stator deteriorate, but the magnetic pole piece cannot be press-fitted to the bottom surface of the outer ring yoke, which can lead to manufacturing defects. be.
  • the present disclosure has been made in view of the above, and aims to obtain an inexpensive and highly efficient inner rotor type electric motor by integrating the tooth portion with the core back portion with high precision by press fitting.
  • an inner rotor type electric motor has a cylindrical core in which a plurality of recesses are arranged at intervals on the inner peripheral side and a plurality of electromagnetic steel sheets are laminated.
  • a stator core having a back portion and a plurality of radially arranged tooth portions in which a plurality of magnetic steel sheets are laminated and pressed into a plurality of concave portions of the core back portion, protruding from an inner peripheral surface of the core back portion. and a rotor arranged inside the stator core.
  • a notch is provided on at least one side of each of the plurality of recesses of the core back portion.
  • FIG. 1 is an exploded perspective view showing the appearance of an inner rotor type electric motor according to a first embodiment
  • FIG. 4 is a cross-sectional view showing a state in which the tooth portions according to the first embodiment are radially arranged
  • FIG. 1 is a first explanatory diagram for explaining various dimensions of the core-back portion according to the first embodiment
  • FIG. 2 is a second explanatory diagram for explaining various dimensions of the core-back portion according to the first embodiment
  • FIG. 11 is a partially enlarged view showing a first example of the lamination state of electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a second example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a third example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a fourth example of the lamination state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a first example of the lamination state of electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a second example of
  • FIG. 11 is a partially enlarged view showing a fifth example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • FIG. 11 is a partially enlarged view showing a sixth example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment;
  • 1 is a front view of an air blower provided with an inner rotor type electric motor according to Embodiment 1.
  • FIG. 1 is an exploded perspective view showing the appearance of an inner rotor type electric motor 100 according to the first embodiment.
  • a rotor 2 is arranged inside a cylindrical stator 1 .
  • the rotor 2 is provided with a shaft portion 23 extending along the central axis (not shown) of the stator 1 .
  • the shaft portion 23 is rotatably supported by two bearings 3a and 3b.
  • the bearing 3a is supported by the shell 4.
  • the bearing 3b is supported by the shell 5.
  • the outer shell 4 and the outer shell 5 constitute a casing for housing the stator 1, rotor 2, and bearings 3a and 3b inside.
  • the stator 1 includes a stator core 6, windings (coils) 7, and insulators 8.
  • the insulator 8 electrically insulates the stator core 6 and the windings 7 .
  • FIG. 2 is a cross-sectional view showing the stator core 6 according to the first embodiment. 2 cuts the stator core 6 perpendicularly to the central axis of the stator 1.
  • FIG. The stator core 6 includes a cylindrical core-back portion 9 and a plurality of tooth portions 10 protruding from the inner peripheral surface of the core-back portion 9 and arranged radially.
  • the core-back portion 9 and the tooth portion 10 are formed by laminating a plurality of electromagnetic steel plates along the axial direction.
  • the stator core 6 is, for example, 2-phase 4-pole and 16 slots.
  • the plurality of teeth 10 are covered with an insulator 8, on which a winding 7 is wound.
  • FIG. 3 is a cross-sectional view showing a state in which the tooth portions 10 according to Embodiment 1 are arranged radially.
  • FIG. 4 is a cross-sectional view showing the core back portion 9 according to the first embodiment.
  • FIG. 5 is a partially enlarged cross-sectional view of the core back portion 9 according to the first embodiment.
  • the core back portion 9 and the tooth portion 10 are formed separately.
  • a plurality of recesses 11 into which root portions of the tooth portions 10 are fitted are formed on the inner peripheral surface of the core back portion 9 .
  • a plurality of teeth 10 are arranged radially.
  • the tooth portion 10 and the concave portion 11 of the core back portion 9 are fitted by press-fitting in order to ensure the inner diameter accuracy when they are integrated. Therefore, there is a possibility that the outer shape of the core-back portion 9 will be deformed due to the press-fitting of the tooth portion 10, and the outer diameter dimension and cylindricity will be deteriorated. Therefore, notches 12 are provided on both sides of each recess 11 .
  • the notch portion 12 By providing the notch portion 12 , the concave portion 11 is deformed in the circumferential direction when the tooth portion 10 is press-fitted, and deformation of the outer shape of the core-back portion 9 can be suppressed. Furthermore, since the side surface of the concave portion 11 is deformed, the press-fitting load is reduced, and seizure can be prevented.
  • the notch 12 may be provided on at least one side of the recess 11 .
  • FIG. 6 is a first explanatory diagram for explaining various dimensions of the core-back portion 9 according to the first embodiment.
  • FIG. 7 is a second explanatory diagram for explaining various dimensions of the core-back portion 9 according to the first embodiment.
  • the core-back portion 9 has a configuration in which a plurality of circular magnetic steel plates having a thickness t are laminated, and has a concave portion 11 for fitting the tooth portion 10 on the inner peripheral side, and a concave portion 11 provided on both sides of the concave portion 11. and a notch 12 .
  • the thickness t is between 0.3 mm and 0.65 mm.
  • a portion between the concave portion 11 and the notch portion 12 is called a fitting holding portion 13 .
  • the width of the fitting holding portion 13 is W1
  • the width of the notch portion 12 is W2.
  • L1 be the radius of the concave portion 11
  • L2 be the radius of the notch portion 12.
  • L3 be the inner diameter (radius) of the core back portion 9 .
  • a radius L ⁇ b>1 of the recess 11 is the distance from the central axis O of the stator 1 to the bottom of the recess 11 .
  • the radius L2 of the notch 12 is the distance from the central axis O of the stator 1 to the bottom of the notch 12 .
  • the radial height of the core back portion 9 is D1
  • the depth of the recess 11 is D3
  • the radial height of the back of the recess 11 is D2.
  • the back portion of the concave portion 11 is a portion from the bottom portion of the concave portion 11 to the outer diameter portion of the core back portion 9 .
  • D1 D2+D3.
  • the depth of the notch 12 is assumed to be D4.
  • L3+D3 L1.
  • L3+D4 L2.
  • Wt be the width of the tooth portion 10 .
  • the interval between adjacent notches 12 with no recess 11 interposed therebetween is defined as Wc.
  • N be the number of teeth 10 .
  • the cutout portion 12 is formed such that the width W1 of the fitting holding portion 13 satisfies the following formula (1). 2 ⁇ t ⁇ W1 ⁇ 3 ⁇ t (1)
  • the width W1 of the fit-and-hold portion 13 is at least twice the thickness t of the electromagnetic steel sheet and at most three times the thickness t of the electromagnetic steel sheet.
  • width W1 is larger than 3 ⁇ t, it becomes difficult to deform the concave portion 11 in the circumferential direction during press-fitting, and deformation of the outer shape increases.
  • the recessed portion 11 may break, so it is desirable that the width W1 of the fitting holding portion 13 is 2 ⁇ t or more.
  • the notch 12 is formed such that the width W2 of the notch 12 satisfies the following formula (2). t ⁇ W2 ⁇ 3 ⁇ t (2)
  • the width W2 of the notch 12 is equal to or greater than the thickness t of the electromagnetic steel sheet and equal to or less than three times the thickness t of the electromagnetic steel sheet.
  • width W2 is smaller than t, it becomes difficult to machine the notch 12, so it is desirable that the width W2 of the notch 12 is t or more.
  • the width of the magnetic flux flowing in the core back portion 9 is narrowed. If the width W2 is larger than 3 ⁇ t, the magnetic flux concentration in the core-back portion 9 is affected, so it is desirable that the width W2 is 3 ⁇ t or less.
  • the interval Wc which is a section that can ensure the radial height D1
  • Wc ⁇ Wt it is desirable that the interval Wc of the notch 12 is equal to or greater than the width Wt of the tooth 10 .
  • D3 ⁇ D1/2 it is desirable that the depth D3 of the recess 11 is less than half the radial height D1 of the core-back portion 9 . By doing so, the strength of the core back portion 9 can be maintained.
  • L2 ⁇ L1. That is, it is desirable that D4 ⁇ D3 and that the depth D4 of the notch 12 is equal to or less than the depth D3 of the recess 11 . This is because magnetic flux concentration in the core-back portion 9 is affected when the depth D4 of the notch portion 12 is increased.
  • the notch portions 12 are provided on both sides of each recess portion 11 of the core back portion 9 . Therefore, when the tooth portion 10 is press-fitted, the concave portion 11 is deformed in the circumferential direction, and deformation of the outer shape of the core back portion 9 can be suppressed. Furthermore, the press-fitting load is reduced, and seizure can be prevented. That is, according to Embodiment 1, the tooth portion 10 is precisely integrated with the core back portion 9 by press-fitting, and an inexpensive and highly efficient inner rotor type electric motor can be obtained.
  • Embodiment 2 An inner rotor type electric motor according to a second embodiment will be described with reference to FIGS. 8 to 13.
  • FIG. In Embodiment 2, the core-back portion 9 is formed by combining and laminating an electromagnetic steel sheet with the notch 12 and an electromagnetic steel sheet without the notch 12 .
  • FIG. 8 is a partially enlarged view showing a first example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 9 is a partially enlarged view showing a second example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 8 is a partially enlarged view showing a first example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 9 is a partially enlarged view showing a second example of the laminated state of the electromagnetic steel sheets in the core
  • FIG. 10 is a partially enlarged view showing a third example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 11 is a partially enlarged view showing a fourth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 12 is a partially enlarged view showing a fifth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • FIG. 13 is a partially enlarged view showing a sixth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
  • the black-painted parts indicate the notch parts 12.
  • the electromagnetic steel sheets 20 with the notch 12 and the electromagnetic steel sheets 30 without the notch 12 are laminated together.
  • the tooth portion 10 can be easily press-fitted, but the positioning performance deteriorates. If the teeth 10 are tilted during press-fitting, the recesses 11 having the cutouts 12 cannot correct the tilt, and the teeth 10 cannot be vertically press-fitted.
  • the magnetic steel sheets 20 having the cutouts 12 and the magnetic steel sheets 30 without the cutouts 12 are mixed and laminated, and both the positioning property and the effect of the cutouts 12 can be achieved. I'm trying
  • the electromagnetic steel sheets 20 with the notch 12 and the electromagnetic steel sheets 30 without the notch 12 are alternately arranged one by one.
  • the electromagnetic steel sheet 20 having the notch 12 is arranged in the central portion, and the electromagnetic steel sheets 30 without the notch 12 are arranged at both ends.
  • the electromagnetic steel sheets 20 with the cutouts 12 are arranged on the upper surface side and the central part, and the electromagnetic steel sheets 30 without the cutouts 12 are arranged on the lower surface side.
  • the electromagnetic steel sheets 20 with the cutouts 12 are arranged on the lower surface side and the central part, and the electromagnetic steel sheets 30 without the cutouts 12 are arranged on the upper surface side.
  • a plurality of electromagnetic steel sheets 20 having notches 12 and a plurality of electromagnetic steel sheets 30 having no notches 12 are alternately arranged.
  • the cases of FIGS. 12 and 13 are effective for those having a large lamination thickness.
  • the electromagnetic steel sheets 20 having the cutout portions 12 and the electromagnetic steel sheets 30 having no cutout portions 12 are mixed and laminated, the positionability and the effect of the cutout portions 12 are obtained. can be compatible.
  • FIG. 14 is a front view of blower 55 including inner rotor type electric motor 100 according to the first embodiment.
  • the inner rotor type electric motor 100 may be applied to a blower 55 that connects blades 54 to the shaft portion 23 and rotates the blades 54 to blow air.
  • the inner rotor type electric motor 100 may be applied to a ventilation fan that rotates blades or impellers to flow air.
  • the inner rotor type electric motor of the second embodiment may be applied to the blower 55 or the ventilation fan.
  • the configuration shown in the above embodiment shows an example of the content of the present disclosure, and can be combined with another known technology. It is also possible to omit or change the part.

Abstract

A stator core (6) has: a cylindrical core back portion (9), on the inner circumferential side of which a plurality of recessed portions (11) are disposed at intervals; and a plurality of tooth portions (10) that are press-fitted into the plurality of recessed portions (11) of the core back portion (9), projects from the inner circumferential surface of the core back portion (9), and are arranged in a radial shape. In the stator core (6), notch portions (12) are respectively provided on at least one sides of the plurality of recessed portions (11) of the core back portion (9).

Description

インナーロータ型電動機および送風機Inner rotor type electric motor and blower
　本開示は、インナーロータ型電動機および送風機に関する。 The present disclosure relates to inner rotor electric motors and blowers.
　インナーロータ型電動機では、筒状の固定子の内側に回転子が配置されている。固定子鉄心は、筒状のコアバック部と、コアバック部の内周面から突出して周方向に並べられた複数の歯部とを有する。歯部にはインシュレータが組み付けられて巻枠が形成され、巻枠に巻線が巻き付けられている。 In the inner rotor type electric motor, the rotor is arranged inside the cylindrical stator. The stator core has a tubular core-back portion and a plurality of tooth portions protruding from an inner peripheral surface of the core-back portion and arranged in a circumferential direction. An insulator is assembled to the teeth to form a winding frame, and a winding is wound around the winding frame.
　特許文献１では、コアバック部としての外輪ヨーク部の内壁に複数の嵌合凹部を形成し、歯部としての複数の磁極片を外輪ヨーク部の複数の嵌合凹部に圧入し、複数の磁極片を外輪ヨーク部に嵌合している。 In Patent Document 1, a plurality of fitting recesses are formed in the inner wall of an outer ring yoke portion as a core back portion, and a plurality of magnetic pole pieces as tooth portions are press-fitted into the plurality of fitting recesses of the outer ring yoke portion to form a plurality of magnetic pole pieces. The piece is fitted to the outer ring yoke portion.
特許第３１０２６６５号公報Japanese Patent No. 3102665
　特許文献１の外輪ヨーク部では、磁極片の圧入により外輪ヨーク部の外形が変形し外径寸法、円筒度が悪化する可能性がある。また、外輪ヨーク部の厚みが厚くなると、圧入時の摩擦熱、摩耗によって嵌合凹部に焼き付きが発生する可能性がある。焼き付きが発生すると、磁極片の位置がずれて、一体化された固定子の内径精度が悪化するだけでなく、外輪ヨーク部の底面まで磁極片を圧入できず、製造不良が発生する可能性もある。 In the outer ring yoke portion of Patent Document 1, the press-fitting of the magnetic pole piece may deform the outer ring yoke portion, degrading the outer diameter and cylindricity. Further, if the thickness of the outer ring yoke portion is increased, there is a possibility that seizure will occur in the fitting recess due to frictional heat and wear during press fitting. If seizure occurs, the position of the magnetic pole piece will be misaligned, and not only will the inner diameter accuracy of the integrated stator deteriorate, but the magnetic pole piece cannot be press-fitted to the bottom surface of the outer ring yoke, which can lead to manufacturing defects. be.
　本開示は、上記に鑑みてなされたものであり、圧入によって歯部をコアバック部に精度よく一体化し、安価で高効率なインナーロータ型電動機を得ることを目的としている。 The present disclosure has been made in view of the above, and aims to obtain an inexpensive and highly efficient inner rotor type electric motor by integrating the tooth portion with the core back portion with high precision by press fitting.
　上述した課題を解決し、目的を達成するために、本開示におけるインナーロータ型電動機は、内周側に複数の凹部が間隔を置いて配置され、複数の電磁鋼板が積層された筒状のコアバック部と、複数の電磁鋼板が積層され、コアバック部の複数の凹部に圧入され、コアバック部の内周面から突出して放射状に並べられた複数の歯部と、を有する固定子鉄心を有する固定子と、固定子鉄心の内側に配置された回転子と、を備える。コアバック部の複数の凹部の少なくとも一方の側に切欠き部をそれぞれ設けたことを特徴とする。 In order to solve the above-described problems and achieve the object, an inner rotor type electric motor according to the present disclosure has a cylindrical core in which a plurality of recesses are arranged at intervals on the inner peripheral side and a plurality of electromagnetic steel sheets are laminated. A stator core having a back portion and a plurality of radially arranged tooth portions in which a plurality of magnetic steel sheets are laminated and pressed into a plurality of concave portions of the core back portion, protruding from an inner peripheral surface of the core back portion. and a rotor arranged inside the stator core. A notch is provided on at least one side of each of the plurality of recesses of the core back portion.
　本開示によれば、圧入によって歯部をコアバック部に精度よく一体化し、安価で高効率なインナーロータ型電動機を得ることができるという効果を奏する。 According to the present disclosure, it is possible to obtain an inexpensive and highly efficient inner rotor type electric motor by integrating the tooth portion with the core back portion with high precision by press fitting.
実施の形態１にかかるインナーロータ型電動機の外観を示す分解斜視図1 is an exploded perspective view showing the appearance of an inner rotor type electric motor according to a first embodiment; FIG. 実施の形態１にかかる固定子鉄心を示す断面図Sectional view showing the stator core according to the first embodiment 実施の形態１にかかる歯部が放射状に並べられた状態を示す断面図FIG. 4 is a cross-sectional view showing a state in which the tooth portions according to the first embodiment are radially arranged; 実施の形態１にかかるコアバック部を示す断面図Sectional view showing the core-back portion according to the first embodiment 実施の形態１にかかるコアバック部の一部拡大断面図Partially enlarged cross-sectional view of the core-back portion according to the first embodiment 実施の形態１にかかるコアバック部の各種寸法を説明するための第１説明図FIG. 1 is a first explanatory diagram for explaining various dimensions of the core-back portion according to the first embodiment; 実施の形態１にかかるコアバック部の各種寸法を説明するための第２説明図FIG. 2 is a second explanatory diagram for explaining various dimensions of the core-back portion according to the first embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第１例を示す一部拡大図FIG. 11 is a partially enlarged view showing a first example of the lamination state of electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第２例を示す一部拡大図FIG. 11 is a partially enlarged view showing a second example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第３例を示す一部拡大図FIG. 11 is a partially enlarged view showing a third example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第４例を示す一部拡大図FIG. 11 is a partially enlarged view showing a fourth example of the lamination state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第５例を示す一部拡大図FIG. 11 is a partially enlarged view showing a fifth example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態２にかかるインナーロータ型電動機のコアバック部における電磁鋼板の積層状態の第６例を示す一部拡大図FIG. 11 is a partially enlarged view showing a sixth example of the laminated state of the electromagnetic steel sheets in the core-back portion of the inner rotor type electric motor according to the second embodiment; 実施の形態１にかかるインナーロータ型電動機を備える送風機の正面図1 is a front view of an air blower provided with an inner rotor type electric motor according to Embodiment 1. FIG.
　以下に、実施の形態にかかるインナーロータ型電動機および送風機を図面に基づいて詳細に説明する。 Below, the inner rotor type electric motor and the blower according to the embodiment will be described in detail based on the drawings.
実施の形態１．
　図１は、実施の形態１にかかるインナーロータ型電動機１００の外観を示す分解斜視図である。インナーロータ型電動機（電動機）１００では、筒状形状の固定子１の内側に回転子２が配置されている。回転子２には、固定子１の中心軸（図示せず）に沿って伸びる軸部２３が設けられている。軸部２３は、２つの軸受３ａ，３ｂによって回転可能に支持されている。軸受３ａは、外郭４によって支持されている。軸受３ｂは、外郭５によって支持されている。外郭４および外郭５によって、固定子１、回転子２、軸受３ａ，３ｂを内部に収容するためのケーシングを構成する。 Embodiment 1.
FIG. 1 is an exploded perspective view showing the appearance of an inner rotor type electric motor 100 according to the first embodiment. In an inner rotor type electric motor (electric motor) 100 , a rotor 2 is arranged inside a cylindrical stator 1 . The rotor 2 is provided with a shaft portion 23 extending along the central axis (not shown) of the stator 1 . The shaft portion 23 is rotatably supported by two bearings 3a and 3b. The bearing 3a is supported by the shell 4. As shown in FIG. The bearing 3b is supported by the shell 5. As shown in FIG. The outer shell 4 and the outer shell 5 constitute a casing for housing the stator 1, rotor 2, and bearings 3a and 3b inside.
　固定子１は、固定子鉄心６と、巻線（コイル）７と、インシュレータ８と、を備えている。インシュレータ８は、固定子鉄心６と巻線７とを電気的に絶縁する。 The stator 1 includes a stator core 6, windings (coils) 7, and insulators 8. The insulator 8 electrically insulates the stator core 6 and the windings 7 .
　図２は、実施の形態１にかかる固定子鉄心６を示す断面図である。図２は、固定子鉄心６を、固定子１の中心軸に対し垂直に切断している。固定子鉄心６は、円筒形状のコアバック部９と、コアバック部９の内周面から突出して放射状に並べられた複数の歯部１０とを備える。コアバック部９および歯部１０は、複数枚の電磁鋼板を軸方向に沿って積層して形成されている。固定子鉄心６は、例えば、２相４極であり、１６スロットである。複数の歯部１０は、インシュレータ８によって覆われており、インシュレータ８上に巻線７が巻かれている。 FIG. 2 is a cross-sectional view showing the stator core 6 according to the first embodiment. 2 cuts the stator core 6 perpendicularly to the central axis of the stator 1. FIG. The stator core 6 includes a cylindrical core-back portion 9 and a plurality of tooth portions 10 protruding from the inner peripheral surface of the core-back portion 9 and arranged radially. The core-back portion 9 and the tooth portion 10 are formed by laminating a plurality of electromagnetic steel plates along the axial direction. The stator core 6 is, for example, 2-phase 4-pole and 16 slots. The plurality of teeth 10 are covered with an insulator 8, on which a winding 7 is wound.
　図３は、実施の形態１にかかる歯部１０が放射状に並べられた状態を示す断面図である。図４は、実施の形態１にかかるコアバック部９を示す断面図である。図５は、実施の形態１にかかるコアバック部９の一部拡大断面図である。図３および図４に示すように、コアバック部９と歯部１０とは分割して別体で形成されている。コアバック部９の内周面には、歯部１０の根本部を嵌める複数の凹部１１が形成されている。固定子１を製造する際には、図３に示すように、複数の歯部１０が放射状に並べられる。 FIG. 3 is a cross-sectional view showing a state in which the tooth portions 10 according to Embodiment 1 are arranged radially. FIG. 4 is a cross-sectional view showing the core back portion 9 according to the first embodiment. FIG. 5 is a partially enlarged cross-sectional view of the core back portion 9 according to the first embodiment. As shown in FIGS. 3 and 4, the core back portion 9 and the tooth portion 10 are formed separately. A plurality of recesses 11 into which root portions of the tooth portions 10 are fitted are formed on the inner peripheral surface of the core back portion 9 . When manufacturing the stator 1, as shown in FIG. 3, a plurality of teeth 10 are arranged radially.
　歯部１０とコアバック部９の凹部１１との嵌め合いは、これらが一体化した際の内径精度を確保するため圧入としている。そのため歯部１０の圧入によってコアバック部９の外形が変形し外径寸法および円筒度が悪化する可能性がある。そこで、各凹部１１の両側に切欠き部１２を設けるようにしている。切欠き部１２を設けることで、歯部１０の圧入時に凹部１１が周方向に変形し、コアバック部９の外形の変形を抑制することができる。さらに、凹部１１の側面が変形するため、圧入荷重が低減され、焼き付きを防ぐことができる。なお、切欠き部１２は、凹部１１の少なくとも一方の側に設けるようにしてもよい。 The tooth portion 10 and the concave portion 11 of the core back portion 9 are fitted by press-fitting in order to ensure the inner diameter accuracy when they are integrated. Therefore, there is a possibility that the outer shape of the core-back portion 9 will be deformed due to the press-fitting of the tooth portion 10, and the outer diameter dimension and cylindricity will be deteriorated. Therefore, notches 12 are provided on both sides of each recess 11 . By providing the notch portion 12 , the concave portion 11 is deformed in the circumferential direction when the tooth portion 10 is press-fitted, and deformation of the outer shape of the core-back portion 9 can be suppressed. Furthermore, since the side surface of the concave portion 11 is deformed, the press-fitting load is reduced, and seizure can be prevented. Note that the notch 12 may be provided on at least one side of the recess 11 .
　図６は、実施の形態１にかかるコアバック部９の各種寸法を説明するための第１説明図である。図７は、実施の形態１にかかるコアバック部９の各種寸法を説明するための第２説明図である。コアバック部９は、円輪状の厚さｔの電磁鋼板が複数枚積層された構成であり、内周側に歯部１０を嵌合するための凹部１１と、凹部１１の両側に設けられた切欠き部１２とを有する。厚さｔは、０．３ｍｍ～０．６５ｍｍである。 FIG. 6 is a first explanatory diagram for explaining various dimensions of the core-back portion 9 according to the first embodiment. FIG. 7 is a second explanatory diagram for explaining various dimensions of the core-back portion 9 according to the first embodiment. The core-back portion 9 has a configuration in which a plurality of circular magnetic steel plates having a thickness t are laminated, and has a concave portion 11 for fitting the tooth portion 10 on the inner peripheral side, and a concave portion 11 provided on both sides of the concave portion 11. and a notch 12 . The thickness t is between 0.3 mm and 0.65 mm.
　凹部１１と切欠き部１２との間を嵌合保持部１３と呼ぶ。嵌合保持部１３の幅をＷ１とし、切欠き部１２の幅をＷ２とする。凹部１１の半径をＬ１とし、切欠き部１２の半径をＬ２とする。コアバック部９の内径（半径）をＬ３とする。凹部１１の半径Ｌ１は、固定子１の中心軸Ｏから凹部１１の底部までの距離である。切欠き部１２の半径Ｌ２は、固定子１の中心軸Ｏから切欠き部１２の底部までの距離である。 A portion between the concave portion 11 and the notch portion 12 is called a fitting holding portion 13 . The width of the fitting holding portion 13 is W1, and the width of the notch portion 12 is W2. Let L1 be the radius of the concave portion 11, and L2 be the radius of the notch portion 12. As shown in FIG. Let L3 be the inner diameter (radius) of the core back portion 9 . A radius L<b>1 of the recess 11 is the distance from the central axis O of the stator 1 to the bottom of the recess 11 . The radius L2 of the notch 12 is the distance from the central axis O of the stator 1 to the bottom of the notch 12 .
　コアバック部９の径方向の高さをＤ１とし、凹部１１の深さをＤ３とし、凹部１１の背部の径方向の高さをＤ２とする。凹部１１の背部とは、凹部１１の底部からコアバック部９の外径部までの部分である。Ｄ１＝Ｄ２＋Ｄ３である。切欠き部１２の深さをＤ４とする。Ｌ３＋Ｄ３＝Ｌ１である。Ｌ３＋Ｄ４＝Ｌ２である。 The radial height of the core back portion 9 is D1, the depth of the recess 11 is D3, and the radial height of the back of the recess 11 is D2. The back portion of the concave portion 11 is a portion from the bottom portion of the concave portion 11 to the outer diameter portion of the core back portion 9 . D1=D2+D3. The depth of the notch 12 is assumed to be D4. L3+D3=L1. L3+D4=L2.
　歯部１０の幅をＷｔとする。凹部１１を挟まずに隣り合う切欠き部１２の間隔をＷｃとする。歯部１０の個数をＮとする。 Let Wt be the width of the tooth portion 10 . The interval between adjacent notches 12 with no recess 11 interposed therebetween is defined as Wc. Let N be the number of teeth 10 .
　２πＬ３／Ｎ＝Ｗｔ＋Ｗｃ＋２×（Ｗ１＋Ｗ２）が成立する。 2πL3/N=Wt+Wc+2×(W1+W2) holds.
　また、嵌合保持部１３の幅Ｗ１は、以下の式（１）を満たすように、切欠き部１２が形成されるのが望ましい。
　　２×ｔ≦Ｗ１≦３×ｔ　　　　　…（１） Moreover, it is desirable that the cutout portion 12 is formed such that the width W1 of the fitting holding portion 13 satisfies the following formula (1).
2×t≦W1≦3×t (1)
　すなわち、嵌合保持部１３の幅Ｗ１は、電磁鋼板の厚さｔの２倍以上で、電磁鋼板の厚さｔの３倍以下であることが望ましい。 That is, it is desirable that the width W1 of the fit-and-hold portion 13 is at least twice the thickness t of the electromagnetic steel sheet and at most three times the thickness t of the electromagnetic steel sheet.
　幅Ｗ１が３×ｔよりも大きくなると、圧入時の凹部１１の周方向の変形がし難くなり、外形の変形が増加するため、３×ｔ以下とするのが望ましい。 If the width W1 is larger than 3×t, it becomes difficult to deform the concave portion 11 in the circumferential direction during press-fitting, and deformation of the outer shape increases.
　一方、Ｗ１が２×ｔよりも小さくなると、凹部１１が破断する恐れがあるので、嵌合保持部１３の幅Ｗ１は２×ｔ以上とするのが望ましい。 On the other hand, if W1 is smaller than 2×t, the recessed portion 11 may break, so it is desirable that the width W1 of the fitting holding portion 13 is 2×t or more.
　また、切欠き部１２の幅Ｗ２は、以下の式（２）を満たすように切欠き部１２が形成されるのが望ましい。
　　ｔ≦Ｗ２≦３×ｔ　　　　　…（２） Moreover, it is desirable that the notch 12 is formed such that the width W2 of the notch 12 satisfies the following formula (2).
t≦W2≦3×t (2)
　すなわち、切欠き部１２の幅Ｗ２は、電磁鋼板の厚さｔ以上で、電磁鋼板の厚さｔの３倍以下であることが望ましい。 That is, it is desirable that the width W2 of the notch 12 is equal to or greater than the thickness t of the electromagnetic steel sheet and equal to or less than three times the thickness t of the electromagnetic steel sheet.
　幅Ｗ２がｔよりも小さくなると、切欠き部１２の加工が困難になるので、切欠き部１２の幅Ｗ２はｔ以上とするのが望ましい。 If the width W2 is smaller than t, it becomes difficult to machine the notch 12, so it is desirable that the width W2 of the notch 12 is t or more.
　一方、切欠き部１２が存在すると、コアバック部９において、磁束の流れる幅が狭くなる。幅Ｗ２が３×ｔよりも大きくなると、コアバック部９の磁束集中に影響が出るので、幅Ｗ２は３×ｔ以下とするのが望ましい。 On the other hand, if the cutout portion 12 exists, the width of the magnetic flux flowing in the core back portion 9 is narrowed. If the width W2 is larger than 3×t, the magnetic flux concentration in the core-back portion 9 is affected, so it is desirable that the width W2 is 3×t or less.
　コアバック部９において、径方向の高さＤ１を確保できる区間である間隔Ｗｃは、大きいほうが磁束集中の影響が少なくなって望ましい。したがって、Ｗｃ≧Ｗｔであるのが望ましい。すなわち、切欠き部１２の間隔Ｗｃは、歯部１０の幅Ｗｔ以上であることが望ましい。 In the core-back portion 9, it is desirable that the interval Wc, which is a section that can ensure the radial height D1, be large because the influence of magnetic flux concentration is reduced. Therefore, it is desirable that Wc≧Wt. That is, it is desirable that the interval Wc of the notch 12 is equal to or greater than the width Wt of the tooth 10 .
　また、Ｄ３≦Ｄ１／２とするのが望ましい。すなわち、凹部１１の深さＤ３はコアバック部９の径方向の高さＤ１の１／２以下であるのが望ましい。こうすることで、コアバック部９の強度を保つことができる。 Also, it is desirable that D3 ≤ D1/2. That is, it is desirable that the depth D3 of the recess 11 is less than half the radial height D1 of the core-back portion 9 . By doing so, the strength of the core back portion 9 can be maintained.
　また、Ｌ２≦Ｌ１とするのが望ましい。すなわち、Ｄ４≦Ｄ３とし、切欠き部１２の深さＤ４が凹部１１の深さＤ３以下とするのが望ましい。切欠き部１２の深さＤ４が大きくなると、コアバック部９の磁束集中に影響が出るためである。 Also, it is desirable that L2 ≤ L1. That is, it is desirable that D4≦D3 and that the depth D4 of the notch 12 is equal to or less than the depth D3 of the recess 11 . This is because magnetic flux concentration in the core-back portion 9 is affected when the depth D4 of the notch portion 12 is increased.
　このように実施の形態１によれば、コアバック部９の各凹部１１の両側に切欠き部１２を設けるようにしている。このため、歯部１０の圧入時に凹部１１が周方向に変形し、コアバック部９の外形の変形を抑制することができる。さらに、圧入荷重が低減され、焼き付きを防ぐことができる。すなわち、実施の形態１によれば、圧入によって歯部１０がコアバック部９に精度よく一体化され、安価で高効率なインナーロータ型電動機を得ることができる。 As described above, according to Embodiment 1, the notch portions 12 are provided on both sides of each recess portion 11 of the core back portion 9 . Therefore, when the tooth portion 10 is press-fitted, the concave portion 11 is deformed in the circumferential direction, and deformation of the outer shape of the core back portion 9 can be suppressed. Furthermore, the press-fitting load is reduced, and seizure can be prevented. That is, according to Embodiment 1, the tooth portion 10 is precisely integrated with the core back portion 9 by press-fitting, and an inexpensive and highly efficient inner rotor type electric motor can be obtained.
実施の形態２．
　図８～図１３に従って実施の形態２にかかるインナーロータ型電動機について説明する。実施の形態２では、切欠き部１２が有る電磁鋼板と、切欠き部１２が無い電磁鋼板とを組み合わせて積層して、コアバック部９を形成する。図８は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第１例を示す一部拡大図である。図９は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第２例を示す一部拡大図である。図１０は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第３例を示す一部拡大図である。図１１は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第４例を示す一部拡大図である。図１２は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第５例を示す一部拡大図である。図１３は、実施の形態２にかかるインナーロータ型電動機のコアバック部９における電磁鋼板の積層状態の第６例を示す一部拡大図である。 Embodiment 2.
An inner rotor type electric motor according to a second embodiment will be described with reference to FIGS. 8 to 13. FIG. In Embodiment 2, the core-back portion 9 is formed by combining and laminating an electromagnetic steel sheet with the notch 12 and an electromagnetic steel sheet without the notch 12 . FIG. 8 is a partially enlarged view showing a first example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment. FIG. 9 is a partially enlarged view showing a second example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment. FIG. 10 is a partially enlarged view showing a third example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment. FIG. 11 is a partially enlarged view showing a fourth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment. FIG. 12 is a partially enlarged view showing a fifth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment. FIG. 13 is a partially enlarged view showing a sixth example of the laminated state of the electromagnetic steel sheets in the core-back portion 9 of the inner rotor type electric motor according to the second embodiment.
　図８～図１３において、黒塗り部が切欠き部１２を示している。図８～図１３においては、切欠き部１２を有する電磁鋼板２０と、切欠き部１２が無い電磁鋼板３０とが混在して積層されている。 　In FIGS. 8 to 13, the black-painted parts indicate the notch parts 12. As shown in FIG. In FIGS. 8 to 13, the electromagnetic steel sheets 20 with the notch 12 and the electromagnetic steel sheets 30 without the notch 12 are laminated together.
　コアバック部９に切欠き部１２を設けると歯部１０の圧入は容易になるが、位置決め性は悪化する。圧入の途中で歯部１０が傾いてしまうと切欠き部１２を設けた凹部１１では傾きを矯正できず、歯部１０を垂直に圧入できない。 If the notch portion 12 is provided in the core back portion 9, the tooth portion 10 can be easily press-fitted, but the positioning performance deteriorates. If the teeth 10 are tilted during press-fitting, the recesses 11 having the cutouts 12 cannot correct the tilt, and the teeth 10 cannot be vertically press-fitted.
　そこで、実施の形態２においては、切欠き部１２を有する電磁鋼板２０と、切欠き部１２が無い電磁鋼板３０とを混在して積層し、位置決め性と切欠き部１２の効果とが両立できるようにしている。 Therefore, in the second embodiment, the magnetic steel sheets 20 having the cutouts 12 and the magnetic steel sheets 30 without the cutouts 12 are mixed and laminated, and both the positioning property and the effect of the cutouts 12 can be achieved. I'm trying
　図８の場合は、切欠き部１２を有する電磁鋼板２０と、切欠き部１２が無い電磁鋼板３０とを一枚ずつ交互に配置している。図９の場合は、切欠き部１２を有する電磁鋼板２０を中央部に配し、切欠き部１２が無い電磁鋼板３０を両端側に配している。図１０の場合は、切欠き部１２を有する電磁鋼板２０を上面側および中央部に配し、切欠き部１２が無い電磁鋼板３０を下面側に配している。図１１の場合は、切欠き部１２を有する電磁鋼板２０を下面側および中央部に配し、切欠き部１２が無い電磁鋼板３０を上面側に配している。図１２、図１３の場合は、切欠き部１２を有する電磁鋼板２０と、切欠き部１２が無い電磁鋼板３０とを、複数枚ずつ交互に配置している。図１２、図１３の場合は、積厚が大きいものに有効である。 In the case of FIG. 8, the electromagnetic steel sheets 20 with the notch 12 and the electromagnetic steel sheets 30 without the notch 12 are alternately arranged one by one. In the case of FIG. 9, the electromagnetic steel sheet 20 having the notch 12 is arranged in the central portion, and the electromagnetic steel sheets 30 without the notch 12 are arranged at both ends. In the case of FIG. 10, the electromagnetic steel sheets 20 with the cutouts 12 are arranged on the upper surface side and the central part, and the electromagnetic steel sheets 30 without the cutouts 12 are arranged on the lower surface side. In the case of FIG. 11, the electromagnetic steel sheets 20 with the cutouts 12 are arranged on the lower surface side and the central part, and the electromagnetic steel sheets 30 without the cutouts 12 are arranged on the upper surface side. In the case of FIGS. 12 and 13 , a plurality of electromagnetic steel sheets 20 having notches 12 and a plurality of electromagnetic steel sheets 30 having no notches 12 are alternately arranged. The cases of FIGS. 12 and 13 are effective for those having a large lamination thickness.
　このように実施の形態２では、切欠き部１２を有する電磁鋼板２０と、切欠き部１２が無い電磁鋼板３０とを混在して積層しているので、位置決め性と切欠き部１２の効果とが両立できる。 As described above, in the second embodiment, since the electromagnetic steel sheets 20 having the cutout portions 12 and the electromagnetic steel sheets 30 having no cutout portions 12 are mixed and laminated, the positionability and the effect of the cutout portions 12 are obtained. can be compatible.
　図１４は、実施の形態１にかかるインナーロータ型電動機１００を備える送風機５５の正面図である。図１４に示すように、軸部２３に羽根５４を連結し、羽根５４を回転させて送風する送風機５５にインナーロータ型電動機１００を適用してもよい。なお、羽根または羽根車を回転させて空気を流動させる換気扇にインナーロータ型電動機１００を適用してもよい。また、送風機５５または換気扇に、実施の形態２のインナーロータ型電動機を適用しても良い。 FIG. 14 is a front view of blower 55 including inner rotor type electric motor 100 according to the first embodiment. As shown in FIG. 14, the inner rotor type electric motor 100 may be applied to a blower 55 that connects blades 54 to the shaft portion 23 and rotates the blades 54 to blow air. Note that the inner rotor type electric motor 100 may be applied to a ventilation fan that rotates blades or impellers to flow air. Also, the inner rotor type electric motor of the second embodiment may be applied to the blower 55 or the ventilation fan.
　以上の実施の形態に示した構成は、本開示の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、本開示の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 shows an example of the content of the present disclosure, and can be combined with another known technology. It is also possible to omit or change the part.
　１　固定子、２　回転子、３ａ，３ｂ　軸受、４，５　外郭、６　固定子鉄心、７　巻線、８　インシュレータ、９　コアバック部、１０　歯部、１１　凹部、１２　切欠き部、１３　嵌合保持部、２０　切欠き部を有する電磁鋼板、２３　軸部、３０　切欠き部が無い電磁鋼板、５４　羽根、５５　送風機、１００　インナーロータ型電動機。 1 Stator, 2 Rotor, 3a, 3b Bearing, 4, 5 Outer shell, 6 Stator core, 7 Winding, 8 Insulator, 9 Core back portion, 10 Tooth portion, 11 Concave portion, 12 Notch portion, 13 Fitting Holding part 20 Electromagnetic steel sheet with notch 23 Shaft part 30 Electromagnetic steel sheet without notch 54 Blade 55 Air blower 100 Inner rotor type electric motor.

Claims (6)

  1. 　内周側に複数の凹部が間隔を置いて配置され、複数の電磁鋼板が積層された筒状のコアバック部と、複数の前記電磁鋼板が積層され、前記コアバック部の複数の前記凹部に圧入され、前記コアバック部の内周面から突出して放射状に並べられた複数の歯部と、を有する固定子鉄心を有する固定子と、
    　前記固定子鉄心の内側に配置された回転子と、
    　を備え、
    　前記コアバック部の複数の前記凹部の少なくとも一方の側に切欠き部をそれぞれ設けた
    　ことを特徴とするインナーロータ型電動機。     A cylindrical core-back portion in which a plurality of recesses are arranged at intervals on the inner peripheral side and a plurality of electromagnetic steel plates are laminated, and a plurality of the magnetic steel plates are laminated in the plurality of recesses of the core-back portion. a stator having a stator core having a plurality of radially arranged tooth portions that are press-fitted and protrude from the inner peripheral surface of the core-back portion;
    a rotor disposed inside the stator core;
    with
    An inner-rotor electric motor, wherein a notch portion is provided on at least one side of each of the plurality of recesses of the core-back portion.
  2. 　前記切欠き部は、前記凹部の両側に設けられることを特徴とする請求項１に記載のインナーロータ型電動機。 The inner rotor type electric motor according to claim 1, characterized in that the cutout portions are provided on both sides of the recess.
  3. 　前記コアバック部における前記凹部と前記切欠き部との間に位置する嵌合保持部の幅は、前記電磁鋼板の厚さの３倍以下であることを特徴とする請求項１または２に記載のインナーロータ型電動機。 3. The width of the fit-and-hold portion positioned between the concave portion and the notch portion in the core-back portion is three times or less the thickness of the electromagnetic steel sheet. inner rotor type electric motor.
  4. 　前記切欠き部の幅が前記電磁鋼板の厚さ以上であることを特徴とする請求項１から３のいずれか１項に記載のインナーロータ型電動機。 The inner rotor type electric motor according to any one of claims 1 to 3, characterized in that the width of the notch is equal to or greater than the thickness of the electromagnetic steel sheet.
  5. 　前記コアバック部は、前記切欠き部を有する第１の電磁鋼板と、前記切欠き部を有さない第２の電磁鋼板とを積層して構成されることを特徴とする請求項１から４のいずれか１項に記載のインナーロータ型電動機。 5. The core-back portion is formed by laminating a first electromagnetic steel sheet having the notch and a second electromagnetic steel sheet having no notch. The inner rotor type electric motor according to any one of 1.
  6. 　請求項１から５のいずれか１項に記載のインナーロータ型電動機と、
    　前記インナーロータ型電動機によって回転され、送風する送風ファンと、
    　を備えることを特徴とする送風機。     an inner rotor type electric motor according to any one of claims 1 to 5;
    a blower fan rotated by the inner rotor type electric motor to blow air;
    A blower comprising:
PCT/JP2021/019608 2021-05-24 2021-05-24 Inner rotor electric motor and fan WO2022249238A1 (en)

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PCT/JP2021/019608 WO2022249238A1 (en) 2021-05-24 2021-05-24 Inner rotor electric motor and fan
JP2023523722A JPWO2022249238A1 (en) 2021-05-24 2021-05-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0191628A (en) * 1987-10-02 1989-04-11 Matsushita Electric Ind Co Ltd Stator
WO2007141907A1 (en) * 2006-06-05 2007-12-13 Mitsubishi Electric Corporation Split type iron core and its manufacturing method, and stator iron core
JP2016063676A (en) * 2014-09-19 2016-04-25 三菱電機株式会社 Rotary electric machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0191628A (en) * 1987-10-02 1989-04-11 Matsushita Electric Ind Co Ltd Stator
WO2007141907A1 (en) * 2006-06-05 2007-12-13 Mitsubishi Electric Corporation Split type iron core and its manufacturing method, and stator iron core
JP2016063676A (en) * 2014-09-19 2016-04-25 三菱電機株式会社 Rotary electric machine

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