WO2023233609A1 - Moteur électrique et climatiseur - Google Patents

Moteur électrique et climatiseur Download PDF

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Publication number
WO2023233609A1
WO2023233609A1 PCT/JP2022/022430 JP2022022430W WO2023233609A1 WO 2023233609 A1 WO2023233609 A1 WO 2023233609A1 JP 2022022430 W JP2022022430 W JP 2022022430W WO 2023233609 A1 WO2023233609 A1 WO 2023233609A1
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WO
WIPO (PCT)
Prior art keywords
lead wire
electric motor
component
cover component
circuit board
Prior art date
Application number
PCT/JP2022/022430
Other languages
English (en)
Japanese (ja)
Inventor
諒伍 ▲高▼橋
隆徳 渡邉
洋樹 麻生
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/022430 priority Critical patent/WO2023233609A1/fr
Publication of WO2023233609A1 publication Critical patent/WO2023233609A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

  • the present disclosure relates to an electric motor and an air conditioner.
  • An objective of the present disclosure is to prevent substrate failure by preventing water vapor from entering the substrate.
  • the electric motor of the present disclosure includes: stator and a circuit board; a molded resin covering the stator and the circuit board; a lead wire connected to the circuit board; and a cover part that covers a part of the lead wire, A part of the cover component is fixed by the mold resin, and another part of the cover component is exposed outside the mold resin, a first end of the lead wire is fixed to the circuit board; a second end of the lead wire extends outside the cover component; the portion of the lead wire between the first end and the second end is provided within the cover component;
  • the angle formed by the direction in which the lead wire extends from the mold resin to the inside of the cover component and the direction in which the lead wire extends from the inside of the cover component to the outside of the cover component is defined as ⁇ 1.
  • the air conditioner of the present disclosure includes: indoor unit and an outdoor unit connected to the indoor unit;
  • the indoor unit, the outdoor unit, or each of the indoor unit and the outdoor unit includes the electric motor.
  • FIG. 1 is a cross-sectional view schematically showing an electric motor according to Embodiment 1.
  • FIG. FIG. 3 is a side view schematically showing a stator.
  • FIG. 2 is a front view schematically showing a stator.
  • FIG. 2 is a front view schematically showing a circuit board (also simply referred to as a "board") fixed to a stator.
  • FIG. 2 is a cross-sectional view of a lead wire provided within the cover component shown in FIG. 1;
  • FIG. 3 is a cross-sectional view schematically showing the internal structure of the cover component. It is a figure which shows roughly an example of a cover component.
  • FIG. 3 is a cross-sectional view schematically showing an electric motor according to modification example 1.
  • Figure 9 schematically shows a tube held in the cover part shown in Figure 8;
  • FIG. 2 is a diagram schematically showing the configuration of an air conditioner according to a second embodiment.
  • Embodiment 1 The electric motor 1 according to the first embodiment will be described below.
  • the z-axis direction (z-axis) indicates a direction parallel to the axis A1 of the electric motor 1
  • the x-axis direction (x-axis) indicates a direction orthogonal to the z-axis direction.
  • the y-axis direction (y-axis) indicates a direction perpendicular to both the z-axis direction and the x-axis direction.
  • the axis A1 is the rotation center of the rotor 2, that is, the rotation axis of the rotor 2.
  • the direction parallel to the axis A1 is also referred to as the "axial direction of the rotor 2" or simply the “axial direction.”
  • the radial direction is the radial direction of the rotor 2, stator 3, or stator core 31, and is a direction perpendicular to the axis A1.
  • the xy plane is a plane perpendicular to the axial direction.
  • Arrow D1 indicates a circumferential direction centered on axis A1.
  • the circumferential direction of the rotor 2, stator 3, or stator core 31 is also simply referred to as the "circumferential direction.”
  • FIG. 1 is a sectional view schematically showing an electric motor 1 according to the first embodiment.
  • the electric motor 1 includes a rotor 2, a stator 3, a circuit board 4, a lead wire 5 connected to the circuit board 4, a molded resin 6 covering the stator 3 and the circuit board 4, and bearings 7a and 7b. It has a cover component 9 that covers a part of the lead wire 5.
  • the electric motor 1 further includes a bracket 8a.
  • the bracket 8a is fixed to the end of the molded resin 6 in the axial direction by press-fitting or screwing.
  • the bracket 8a is preferably made of metal or resin.
  • the bracket 8a When the bracket 8a is made of metal, the bracket 8a also functions as a heat sink, so the heat dissipation efficiency of the entire electric motor 1 is improved.
  • the bracket 8a When the bracket 8a is made of aluminum, the thermal conductivity of the bracket 8a can be increased, and the heat dissipation efficiency of the electric motor 1 as a whole can be further improved.
  • the bearings 7a and 7b may be held by the bracket 8a. In this case, it is possible to prevent electrolytic corrosion from occurring between the bearings 7a, 7b and the bracket 8a. As a result, vibration and noise in the electric motor 1 can be reduced.
  • the bracket 8a is made of resin, the bracket 8a may be formed as a part of the molded resin 6. Even in this case, occurrence of electrolytic corrosion between the bearings 7a, 7b and the bracket 8a can be prevented, and vibration and noise in the electric motor 1 can be reduced.
  • the electric motor 1 is, for example, a permanent magnet synchronous motor, but is not limited thereto.
  • Bearings 7a and 7b rotatably support shaft 22 of rotor 2.
  • the rotor 2 is rotatably arranged inside the stator 3. An air gap exists between the rotor 2 and the stator 3.
  • the rotor 2 has a rotor core 21 and a shaft 22.
  • the rotor 2 is rotatable around a rotation axis (ie, axis A1).
  • the rotor 2 may further include permanent magnets to form the magnetic poles of the rotor 2.
  • FIG. 2 is a side view schematically showing the stator 3.
  • FIG. 3 is a front view schematically showing the stator 3.
  • FIG. 2 is a side view schematically showing the stator 3.
  • FIG. 3 is a front view schematically showing the stator 3.
  • the stator 3 includes a stator core 31, at least one winding 32 (also referred to as a stator winding), and at least one insulating section 33.
  • the stator core 31 has at least one tooth 311.
  • stator core 31 has a plurality of teeth 311.
  • the stator core 31 is formed of a plurality of electromagnetic steel plates laminated in the axial direction.
  • each of the plurality of electromagnetic steel sheets is formed into a predetermined shape by a punching process.
  • These electromagnetic steel plates are fixed to each other by caulking, welding, adhesion, or the like.
  • the winding 32 is, for example, a magnet wire.
  • the winding 32 is wound around an insulating part 33.
  • a coil is formed by winding the winding 32 around the insulating part 33.
  • the winding 32 is electrically connected to a terminal 32a (also referred to as a winding terminal).
  • the end of the winding 32 is hooked onto the hook portion of the terminal 32a, and is fixed to the terminal 32a by fusing or soldering.
  • the terminal 32a is fixed to the insulating part 33 and electrically connected to the circuit board 4.
  • the insulating portion 33 is provided on each tooth 311, for example.
  • the insulating section 33 is combined with each tooth 311.
  • the insulating section 33 has at least one fixing section 331 that fixes the circuit board 4 .
  • the insulating portion 33 is, for example, a thermoplastic resin such as polybutylene terephthalate (PBT).
  • PBT polybutylene terephthalate
  • the insulating section 33 electrically insulates the stator core 31 (specifically, each tooth 311 of the stator core 31) and the winding 32.
  • the insulating portion 33 is molded integrally with the stator core 31.
  • the insulating portion 33 may be formed in advance and the formed insulating portion 33 may be combined with the stator core 31.
  • FIG. 4 is a front view schematically showing the circuit board 4 fixed to the stator 3.
  • the circuit board 4 has a positioning hole 43 (also simply referred to as a "hole") that engages with the fixing part 331 (specifically, the protrusion 331a) of the insulating part 33.
  • the circuit board 4 is fixed to the stator 3, for example.
  • the fixing part 331 of the insulating part 33 has a protrusion 331a and a support part 331b.
  • the protrusion 331a is inserted into a positioning hole 43 formed in the circuit board 4.
  • the protrusion 331a is fixed to the circuit board 4 (specifically, the positioning hole 43) by a fixing method such as thermal welding or ultrasonic welding.
  • the circuit board 4 is fixed to the insulating section 33.
  • the support portion 331b supports the circuit board 4 in the axial direction and positions the circuit board 4 in the axial direction.
  • the circuit board 4 is located on one end side of the stator 3 in the axial direction of the stator 3.
  • the circuit board 4 includes a drive circuit 42.
  • the drive circuit 42 is fixed to the circuit board 4.
  • the drive circuit 42 is a circuit for controlling the rotation of the rotor 2.
  • the drive circuit 42 includes, for example, a drive element 42a and a Hall IC (Integrated Circuit) 42b.
  • the drive element 42a is, for example, a power transistor.
  • the Hall IC 42b detects magnetic flux from the rotor 2 in order to detect the rotational position of the rotor 2.
  • the lead wire 5 has a first end 51 that is one end of the lead wire 5, and a second end 52 that is the other end of the lead wire 5.
  • lead wire 5 is directly connected to circuit board 4 .
  • the first end 51 of the lead wire 5 is fixed to the circuit board 4.
  • the first end 51 is covered with mold resin 6.
  • the second end 52 of the lead wire 5 is exposed outside the mold resin 6 and the cover component 9. A portion of the lead wire 5 between the first end 51 and the second end 52 is provided within the cover part 9 .
  • the mold resin 6 is a resin that covers the stator 3 and the circuit board 4.
  • the mold resin 6 is, for example, a thermosetting resin such as bulk molding compound (BMC).
  • BMC bulk molding compound
  • Bulk molding compounds are suitable for insert molding because they allow low pressure molding.
  • the mold resin 6 may be a thermoplastic resin such as polyphenylene sulfide (PPS).
  • PPS polyphenylene sulfide
  • stator core 31, the winding 32, the insulating part 33, and the mold resin 6 are integrally molded.
  • the stator core 31, the winding 32, the insulating section 33, and the molded resin 6 are integrated as one component (also referred to as a molded stator).
  • stator core 31, the winding 32, the insulating section 33, and the circuit board 4 are integrally molded with the mold resin 6.
  • the molded stator and the circuit board 4 are integrated as one component.
  • a part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6.
  • FIG. 5 is a sectional view showing the lead wire 5 provided in the cover component 9 shown in FIG.
  • the angle ⁇ 1 is the angle formed by the direction in which the lead wire 5 extends from the mold resin 6 into the inside of the cover component 9 and the direction in which the lead wire 5 extends from the inside of the cover component 9 to the outside of the cover component 9. .
  • the lead wire 5 is held by the cover component 9 so that ⁇ 1 ⁇ 135 degrees is satisfied.
  • ⁇ 2 is expressed as "180 degrees - ⁇ 1 degree". Therefore, the lead wire 5 is held by the cover component 9 so that 45 degrees ⁇ ⁇ 2 is satisfied.
  • the angle ⁇ 1 may be ⁇ 1 ⁇ 90 degrees. Furthermore, the angle ⁇ 1 may be ⁇ 1 ⁇ 90 degrees.
  • the cover component 9 is made of resin, for example.
  • FIG. 6 is a sectional view schematically showing the internal structure of the cover component 9.
  • the cover component 9 has a cavity 9A through which a portion of the lead wire 5 extends.
  • the lead wire 5 is curved within the cavity 9A.
  • at least one of the first component 91 and the second component 92 has a groove 9B into which a portion of the lead wire 5 is fitted.
  • the cavity 9A is formed by a groove 9B.
  • FIG. 7 is a diagram schematically showing an example of the cover component 9.
  • the cover component 9 is composed of a plurality of components.
  • the cover component 9 includes a first component 91 that covers a portion of the lead wire 5 and a second component 92 that covers a portion of the lead wire 5. In this case, a portion of the lead wire 5 is covered with the first component 91 and the second component 92.
  • the second component 92 is combined with the first component 91.
  • first part 91 and second part 92 are engaged with each other.
  • FIG. 8 is a cross-sectional view schematically showing the electric motor 1 according to the first modification.
  • FIG. 9 schematically shows the tube 93 held by the cover part 9 shown in FIG.
  • the electric motor 1 according to the first modification has a tube 93 that covers a part of the lead wire 5.
  • the tube 93 is sandwiched between a first part 91 and a second part 92.
  • a part of the cover part 9 is fixed by the molded resin 6, and the other part of the cover part 9 is exposed outside the molded resin 6. That is, the lead wire 5 extends from the outside of the electric motor 1 through the cover component 9 and into the molded resin 6, and the first end 51 of the lead wire 5 is fixed to the circuit board 4. .
  • the lead wire 5 is curved within the cover part 9. That is, the direction in which the lead wire 5 extends from the outside of the motor 1 into the inside of the cover component 9 is different from the direction in which the lead wire 5 extends from the inside of the cover component 9 into the inside of the molded resin 6. ing.
  • the cover component 9 is composed of multiple components, a part of the lead wire 5 can be easily placed inside the cover component 9. As a result, the electric motor 1 can be manufactured efficiently.
  • the cover part 9 When the cover part 9 is composed of a first part 91 and a second part 92, a part of the lead wire 5 can be held by the first part 91 and the second part 92. In other words, the position of the cover component 9 can be fixed with respect to the lead wire 5, and the electric motor 1 can be manufactured efficiently. Furthermore, the curve of the lead wire 5 can be easily maintained.
  • the position of the lead wire 5 in the cover component 9 can be easily fixed.
  • the electric motor 1 can be manufactured efficiently.
  • the curve of the lead wire 5 can be easily maintained.
  • the first part 91 and the second part 92 When the first part 91 and the second part 92 are engaged with each other, a part of the lead wire 5 can be easily held by the first part 91 and the second part 92. Furthermore, in the manufacturing process of the electric motor 1, the first part 91 and the second part 92 can be easily combined.
  • the cover component 9 has a cavity 9A
  • a part of the lead wire 5 is provided within the cavity 9A. That is, the lead wire 5 passes through the cavity 9A.
  • the cavity 9A it is desirable that a portion of the lead wire 5 not be in contact with the inner wall of the cover component 9.
  • the cover part 9 is made of resin.
  • the cover component 9 can be easily manufactured into various shapes.
  • the tube 93 When part of the lead wire 5 is covered by the tube 93 within the cover component 9, the part of the lead wire 5 can be protected by the tube 93. Furthermore, since the tube 93 can be fixed to the cover component 9 together with the lead wire 5, the electric motor 1 can be manufactured efficiently.
  • Embodiment 2 An air conditioner 10 (also referred to as a refrigeration air conditioner or a refrigeration cycle device) according to a second embodiment will be described.
  • FIG. 10 is a diagram schematically showing the configuration of an air conditioner 10 according to the second embodiment.
  • the air conditioner 10 includes an indoor unit 11 as a blower (also referred to as a first blower), and an outdoor unit 13 as a blower (also referred to as a second blower) connected to the indoor unit 11. has.
  • the air conditioner 10 includes an indoor unit 11, a refrigerant pipe 12, and an outdoor unit 13.
  • the outdoor unit 13 is connected to the indoor unit 11 through the refrigerant pipe 12.
  • the indoor unit 11 includes an electric motor 11a (for example, the electric motor 1 according to the first embodiment), an air blower 11b that blows air by being driven by the electric motor 11a, and a housing 11c that covers the electric motor 11a and the air blower 11b.
  • the blowing section 11b has, for example, a blade 11d driven by an electric motor 11a.
  • the blade 11d is fixed to the shaft of the electric motor 11a and generates an airflow.
  • the outdoor unit 13 includes an electric motor 13a (for example, the electric motor 1 according to the first embodiment), an air blower 13b, a compressor 14, a heat exchanger (not shown), an air blower 13b, a compressor 14, and a heat exchanger 13b, a compressor 14, and a heat exchanger (not shown). It has a housing 13c that covers the exchanger.
  • the blower section 13b blows air by being driven by the electric motor 13a.
  • the blower section 13b has, for example, a blade 13d driven by an electric motor 13a.
  • the blade 13d is fixed to the shaft of the electric motor 13a and generates an airflow.
  • the compressor 14 includes an electric motor 14a (for example, the electric motor 1 according to the first embodiment), a compression mechanism 14b (for example, a refrigerant circuit) driven by the electric motor 14a, and a housing 14c that covers the electric motor 14a and the compression mechanism 14b.
  • an electric motor 14a for example, the electric motor 1 according to the first embodiment
  • a compression mechanism 14b for example, a refrigerant circuit driven by the electric motor 14a
  • a housing 14c that covers the electric motor 14a and the compression mechanism 14b.
  • At least one of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment. That is, the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13 includes the electric motor 1 described in the first embodiment.
  • the electric motor 1 described in Embodiment 1 is applied to at least one of the electric motor 11a and the electric motor 13a as a drive source of the air blower. That is, the electric motor 1 described in the first embodiment is applied to the indoor unit 11, the outdoor unit 13, or each of the indoor unit 11 and the outdoor unit 13.
  • the electric motor 1 described in the first embodiment may be applied to the electric motor 14a of the compressor 14.
  • the air conditioner 10 can perform air conditioning such as a cooling operation in which cold air is blown from the indoor unit 11 and a heating operation in which warm air is blown.
  • the electric motor 11a is a drive source for driving the blower section 11b.
  • the blowing section 11b can blow the conditioned air.
  • the electric motor 11a is fixed to the housing 11c of the indoor unit 11 with, for example, screws.
  • the electric motor 13a is fixed to the housing 13c of the outdoor unit 13 with, for example, screws.
  • the electric motor 1 described in the first embodiment is applied to at least one of the electric motor 11a and the electric motor 13a, so that the same advantages as those described in the first embodiment are obtained. be able to. As a result, failure of the air conditioner 10 can be prevented.
  • the electric motor 1 according to the first embodiment when used as a drive source for a blower (for example, the indoor unit 11), the same advantages as described in the first embodiment can be obtained. As a result, failure of the blower can be prevented.
  • the blower having the electric motor 1 according to the first embodiment and the blades (for example, the blades 11d or 13d) driven by the electric motor 1 can be used alone as a device for blowing air. This blower can also be applied to devices other than the air conditioner 10.
  • the electric motor 1 according to the first embodiment is used as the drive source for the compressor 14, the same advantages as described in the first embodiment can be obtained. As a result, failure of the compressor 14 can be prevented.
  • the electric motor 1 described in Embodiment 1 can be installed in equipment having a drive source, such as a ventilation fan, home appliances, or a machine tool.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Le moteur électrique (1) selon la présente invention comprend un stator (3), une carte de circuit imprimé (4), une résine de moule (6) recouvrant le stator (3) et la carte de circuit imprimé (4), un fil conducteur (5) connecté à la carte de circuit imprimé (4), et un composant couvercle (9) recouvrant une partie du fil conducteur (5). Une première extrémité (51) du fil conducteur (5) est fixée à la carte de circuit imprimé (4). Une seconde extrémité (52) du fil conducteur (5) fait saillie vers l'extérieur du composant couvercle (9). Une partie du fil conducteur (5) est disposée à l'intérieur du composant couvercle (9). Lorsque l'angle formé entre une direction dans laquelle le fil conducteur (5) s'étend de la résine de moule (6) à l'intérieur du composant couvercle (9), et une direction dans laquelle le fil conducteur (5) s'étend de l'intérieur du composant couvercle (9) à l'extérieur du composant couvercle (9) est défini comme θ1, le fil conducteur (5) est maintenu par le composant couvercle (9) de façon à satisfaire θ1 < 135 degrés.
PCT/JP2022/022430 2022-06-02 2022-06-02 Moteur électrique et climatiseur WO2023233609A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/022430 WO2023233609A1 (fr) 2022-06-02 2022-06-02 Moteur électrique et climatiseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/022430 WO2023233609A1 (fr) 2022-06-02 2022-06-02 Moteur électrique et climatiseur

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WO2023233609A1 true WO2023233609A1 (fr) 2023-12-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0321954U (fr) * 1989-03-07 1991-03-06
JPH06225496A (ja) * 1993-01-27 1994-08-12 Shibaura Eng Works Co Ltd モールド電動機
JP2006288137A (ja) * 2005-04-04 2006-10-19 Kayaba Ind Co Ltd モータ構造
JP2021112084A (ja) * 2020-01-15 2021-08-02 リンナイ株式会社 モータ
WO2022079837A1 (fr) * 2020-10-14 2022-04-21 三菱電機株式会社 Moteur électrique, soufflante et climatiseur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0321954U (fr) * 1989-03-07 1991-03-06
JPH06225496A (ja) * 1993-01-27 1994-08-12 Shibaura Eng Works Co Ltd モールド電動機
JP2006288137A (ja) * 2005-04-04 2006-10-19 Kayaba Ind Co Ltd モータ構造
JP2021112084A (ja) * 2020-01-15 2021-08-02 リンナイ株式会社 モータ
WO2022079837A1 (fr) * 2020-10-14 2022-04-21 三菱電機株式会社 Moteur électrique, soufflante et climatiseur

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