WO2023181238A1 - Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération - Google Patents

Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération Download PDF

Info

Publication number
WO2023181238A1
WO2023181238A1 PCT/JP2022/013872 JP2022013872W WO2023181238A1 WO 2023181238 A1 WO2023181238 A1 WO 2023181238A1 JP 2022013872 W JP2022013872 W JP 2022013872W WO 2023181238 A1 WO2023181238 A1 WO 2023181238A1
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
coil
stator
tooth
slot
Prior art date
Application number
PCT/JP2022/013872
Other languages
English (en)
Japanese (ja)
Inventor
大輝 岩田
篤 松岡
淳史 石川
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/JP2022/013872 priority Critical patent/WO2023181238A1/fr
Publication of WO2023181238A1 publication Critical patent/WO2023181238A1/fr

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles

Definitions

  • the present disclosure relates to a stator, an electric motor, a compressor, and a refrigeration cycle device.
  • the electric motor has a stator core with teeth and a coil wound around the teeth.
  • a coil When a coil is wound with distributed winding, the coil end tends to become large and the circumference of the coil becomes long.
  • Patent Document 1 discloses a stator core in which a stepped portion is formed at the end of the tooth in the axial direction.
  • the circumferential length of the coil will be shortened.
  • the width of the axial end portion of the tooth becomes narrow due to the formation of the stepped portion, there is a problem in that the magnetic flux density increases and iron loss increases.
  • the present disclosure has been made to solve the above problems, and aims to shorten the circumferential length of the coil while suppressing an increase in iron loss.
  • the stator in the present disclosure includes a yoke extending in the circumferential direction centered on the axis, first teeth and second teeth extending radially inward from the yoke centered on the axis, and first teeth.
  • a stator core having a slot formed between a tooth and a second tooth, and a coil wound around the stator core that passes through the slot and is bent toward the first tooth. and a winding having.
  • the first tooth has a stepped portion at the end in the axial direction, and the second tooth does not have a stepped portion at the end in the axial direction.
  • stator of the present disclosure includes the first teeth having a stepped portion and the second teeth having no stepped portion, the circumferential length of the coil can be shortened while suppressing an increase in iron loss. .
  • FIG. 1 is a cross-sectional view showing an electric motor of Embodiment 1.
  • FIG. 3 is a plan view showing the stator of Embodiment 1.
  • FIG. 3 is a plan view showing a part of the stator of Embodiment 1.
  • FIG. 2 is a perspective view showing a part of the stator according to the first embodiment.
  • FIG. 2 is a plan view (A) showing a part of the stator of Embodiment 1, and an enlarged view (B) showing the periphery of a slot.
  • FIG. 3 is a plan view (A) showing a part of a stator of Comparative Example 1, and an enlarged view (B) showing the periphery of a slot.
  • FIGS. FIG. 3 is a plan view (A) showing a part of a stator of Comparative Example 2, and an enlarged view (B) showing the periphery of a slot.
  • FIG. 3 is a cross-sectional view showing a stator according to a second embodiment.
  • FIGS. 7A and 7B are enlarged views showing the peripheries of slots in a stator of Comparative Example 3 and a stator of Embodiment 2;
  • FIGS. 12 is a plan view showing a part of the stator of Embodiment 3. It is a figure showing a compressor to which the electric motor of each embodiment is applicable. It is a figure showing a refrigeration cycle device to which the electric motor of each embodiment is applicable.
  • FIG. 1 is a sectional view showing an electric motor 100 according to the first embodiment.
  • the electric motor 100 is a synchronous electric motor, and is incorporated into a compressor, for example.
  • the electric motor 100 has an annular stator 1 and a rotor 5 rotatably provided inside the stator 1. An air gap is formed between the stator 1 and the rotor 5.
  • FIG. 1 is a sectional view taken in a plane perpendicular to the axis Ax.
  • the stator 1 has a stator core 10 and a winding 2 wound around the stator core 10.
  • the stator core 10 is composed of a laminate in which a plurality of electromagnetic steel plates are laminated in the axial direction and fixed by caulking or the like.
  • the thickness of the electromagnetic steel plate is, for example, 0.1 to 0.7 mm.
  • the stator core 10 has an annular yoke 11 centered on the axis Ax, and a plurality of teeth 12 extending radially inward from the yoke 11. Teeth 12 are arranged at equal intervals in the circumferential direction. The number of teeth 12 is 18 here, but it may be 2 or more. A slot 13, which is a space for accommodating the winding 2, is formed between teeth 12 adjacent in the circumferential direction. The number of slots 13 is the same as the number of teeth 12.
  • an insulating part made of resin that is, an insulating film 31 and an insulator 32 shown in FIG. 4 is provided between the stator core 10 and the winding 2. It will be done.
  • the rotor 5 has a cylindrical rotor core 50 and a permanent magnet 55 attached to the rotor core 50.
  • the rotor core 50 is composed of a laminated body in which a plurality of electromagnetic steel plates are laminated in the axial direction and fixed by caulking or the like.
  • the thickness of the electromagnetic steel plate is, for example, 0.1 to 0.7 mm.
  • the rotor core 50 has a center hole 53 at the center in the radial direction.
  • a rotating shaft 60 is fixed to the center hole 53 by shrink fitting, press fitting, adhesive, or the like.
  • a plurality of magnet insertion holes 51 are formed along the outer periphery of the rotor core 50.
  • six magnet insertion holes 51 are formed at equal intervals in the circumferential direction.
  • the number of magnet insertion holes 51 is not limited to six, but may be two or more.
  • Each magnet insertion hole 51 reaches from one end of the rotor core 50 in the axial direction to the other end.
  • Each permanent magnet 55 is inserted into each magnet insertion hole 51. That is, a total of six permanent magnets 55 are embedded in the rotor core 50. Each permanent magnet 55 constitutes one magnetic pole, and the number of poles of the rotor 5 is six. However, the number of poles of the rotor 5 is not limited to six, but may be two or more. Each permanent magnet 55 is made of, for example, a rare earth magnet.
  • each magnet insertion hole 51 Although one permanent magnet 55 is inserted into each magnet insertion hole 51 here, two or more permanent magnets 55 may be inserted into each magnet insertion hole 51. Furthermore, although each magnet insertion hole 51 extends linearly here, it may extend in a V-shape convex toward the inner circumferential side.
  • Flux barriers 52 are formed on both circumferential sides of each magnet insertion hole 51 in the rotor core 50.
  • a thin wall portion is formed between the flux barrier 52 and the outer periphery of the rotor core 50.
  • the width of the thin wall portion is set to be equal to the thickness of the electromagnetic steel sheet.
  • FIG. 2 is a top view showing the stator 1.
  • the winding 2 includes a U-phase coil 20U as a first-phase coil, a V-phase coil 20V as a second-phase coil, and a W-phase coil 20W as a third-phase coil.
  • the coils 20U, 20V, and 20W are all made of copper wire or aluminum wire.
  • the winding 2 here has three coils 20U, 20V, and 20W.
  • the three coils 20U are arranged at intervals of 120 degrees in the circumferential direction around the axis Ax, and each coil 20U is wound so as to straddle the three teeth 12. The same applies to the coils 20V and 20W.
  • the coil 20U is arranged at the innermost position in the radial direction.
  • Coil 20V is arranged radially outward with respect to coil 20U.
  • the coil 20W is routed from the radially outer side of the coil 20U to the radially inner side of the coil 20V.
  • Two of the coils 20U, 20V, and 20W overlap in the radial direction. That is, the coils 20U and 20V overlap in the radial direction, the coils 20V and 20W overlap in the radial direction, and the coils 20U and 20W overlap in the radial direction.
  • Each of the coils 20U, 20V, and 20W has two coil sides 201 that are inserted into the slots 13 and two coil ends 202 that extend along the axial end surfaces of the teeth 12.
  • One coil side 201 is inserted into each slot 13 of the stator core 10.
  • the coils 20U, 20V, and 20W will be referred to as "coils 20" unless there is a particular need to distinguish them. Note that the arrangement example of the coils 20U, 20V, and 20W of the winding 2 shown in FIG. 2 is an example, and the arrangement is not limited thereto.
  • FIG. 3 is a plan view showing a part of the stator 1. As described above, each slot 13 accommodates the coil side 201 of one coil 20. The coil 20 is wound every three slots, that is, so as to straddle the three teeth 12.
  • the teeth 12 include teeth 12A as first teeth and teeth 12B as second teeth.
  • teeth 12A and teeth 12B are provided and are arranged alternately in the circumferential direction.
  • Each coil 20 is wound so as to straddle the tooth 12B and the two teeth 12A on both sides thereof.
  • the coil 20 that has passed through the slot 13 is bent toward the teeth 12A, passes through the teeth 12B and the two slots 13 in the circumferential direction, passes through another tooth 12A, and is inserted into the slots 13.
  • the left tooth 12A in FIG. 3 includes a coil 20U that has passed through the left slot 13 (i.e., the first slot) of the tooth 12A, and a coil 20U that has passed through the right slot 13 (i.e., the second slot) of the tooth 12A.
  • the passed coil 20V is wound.
  • each tooth 12A the coil 20 that has passed through the slots 13 on both sides of each tooth 12A is wound so as to be bent.
  • the coil end 202 passes through the axial end face of each tooth 12B.
  • a stepped portion S is formed at the axial end of the tooth 12A on the slot 13 side.
  • the stepped portion S is formed at a position corresponding to a portion where the coil 20 is bent, that is, a corner portion between the coil side 201 and the coil end 202 of the coil 20.
  • the stepped portion S may be formed at at least one end of the tooth 12A in the axial direction, but it is preferably formed at both ends of the tooth 12A in the axial direction.
  • the stepped portions S are formed on both sides in the circumferential direction of the axial end portions of the teeth 12A. Therefore, the teeth 12A have a stepped portion S at a position corresponding to the bent portion of the coil 20 of one phase, and also have a stepped portion S at a position corresponding to the bent portion of the coil 20 of the other phase.
  • the left tooth 12A in FIG. 3 has a stepped portion S at a position corresponding to the bent portion of the coil 20U, and also has a stepped portion S at a position corresponding to the bent portion of the coil 20V.
  • the step S is not formed at the axial end of the teeth 12B.
  • FIG. 4 is a perspective view showing a portion of the stator core 10 including one tooth 12 and an insulating portion attached to this portion. The axial direction is indicated by arrow Z. Although the teeth 12 shown in FIG. 4 are the teeth 12A, the teeth 12B are also provided with similar insulating parts.
  • the insulating portion attached to the teeth 12 includes an insulating film 31 provided in the slot 13 and an insulator 32 provided on the axial end surface of the stator core 10.
  • the insulating film 31 is fixed to a side surface 31a fixed to the side surface of the tooth 12, an inner circumferential portion 31b fixed to the inner circumferential surface of the yoke 11, and a surface of the tooth tip of the tooth 12 on the slot 13 side. It has a tip portion 31c.
  • the insulating film 31 does not necessarily need to have all of the side surface portion 31a, the inner peripheral portion 31b, and the tip portion 31c, and it is sufficient to have at least the side surface portion 31a.
  • the axial length of the insulating film 31 is the same as the axial length of the stator core 10. Note that an example in which the axial length of the insulating film 31 is longer than the axial length of the stator core 10 will be described in Embodiment 2.
  • the insulator 32 has a body portion 32a located on the teeth 12, a wall portion 32b located on the yoke 11, and a flange portion 32c located on the tips of the teeth 12.
  • the insulator 32 may be provided with a wall portion 32d that covers a portion of the inner circumferential surface of the slot 13, if necessary.
  • FIG. 5(A) is a schematic diagram showing a part of the stator 1.
  • the stator core 10 is shown spread out in a straight line, and the circumferential direction is indicated by an arrow C.
  • FIG. 5(B) is a schematic diagram showing the periphery of the slot 13 of the stator 1.
  • the insulating portion that is, the insulating film 31 and insulator 32 shown in FIG. 4 are omitted.
  • a first side surface 121 facing the slot 13 is formed at the axial center of the tooth 12A.
  • a second side surface 122 facing the slot 13 is formed at the axial end of the tooth 12A.
  • the second side surface 122 of the tooth 12A is located at a position retracted further inward in the width direction of the tooth 12A than the first side surface 121. In other words.
  • the first side surface 121 of the teeth 12A is located at a position that protrudes further into the slot 13 than the second side surface 122.
  • the circumferential width W2 (hereinafter referred to as width W2) at the axial end of the tooth 12A is the circumferential width W1 (hereinafter referred to as width W2) at the axial center of the tooth 12A. (referred to as W1).
  • the above-described stepped portion S is formed between the first side surface 121 and the second side surface 122 of the teeth 12A.
  • the stepped portion S faces the portion where the coil 20 in the slot 13 is bent, in other words, the corner portion between the coil side 201 and the coil end 202. Therefore, the coil 20 passes through the slot 13 in the axial direction, bends along the stepped portion S toward the teeth 12A, and extends in the circumferential direction on the axial end surface 12e of the teeth 12A.
  • the stator core 10 has a first core portion 101 and a second core portion 102 in the axial direction.
  • the first core portion 101 is located at the center of the stator core 10 in the axial direction
  • the second core portion 102 is located at the end of the stator core 10 in the axial direction.
  • the first core portion 101 corresponds to a portion of the teeth 12A having a first side surface 121
  • the second core portion 102 corresponds to a portion of the tooth 12A having a second side surface 122.
  • the teeth 12B have side surfaces 120 facing the slots 13.
  • the positions of the side surfaces 120 in the width direction of the teeth 12B are the same at both the axial ends and the axial center. That is, the width W1 of the teeth 12B is constant in the axial direction.
  • FIG. 6(A) is a schematic diagram showing a part of the stator 1C of Comparative Example 1.
  • FIG. 6(B) is a schematic diagram showing the periphery of the slot 13 of the stator 1C of Comparative Example 1. In FIGS. 6A and 6B, the insulating portion is omitted.
  • FIGS. 7A and 7B are schematic diagrams showing the surroundings of the slots 13 in the stator 1C of the comparative example and the stator 1 of the first embodiment.
  • the insulating portion is omitted.
  • the coil 20 begins to bend on the axial outside of the slot 13, so the height H from the end surface 12e of the tooth 12B to the coil end 202 increases. .
  • the tooth 12A on the side where the coil 20 is bent has the stepped portion S. Therefore, as shown in FIG. 7(B), the coil 20 begins to bend at the stepped portion S of the teeth 12A. In other words, the coil 20 begins to bend within the slot 13. Therefore, the height H from the end surface 12e of the teeth 12A to the coil end 202 becomes low, and the axial length of the coil 20 becomes short. This shortens the circumferential length of the coil 20 and reduces copper loss.
  • the circumferential length of the coil 20 is the sum of the axial length and circumferential length of the coil 20. More specifically, it is the total length of two coil sides 201 and two coil ends 202 that constitute one coil 20.
  • FIG. 8(A) is a schematic diagram showing a part of the stator 1D of Comparative Example 2.
  • FIG. 8(B) is a schematic diagram showing the periphery of the slot 13 of the stator 1D of Comparative Example 2.
  • the insulating portion is omitted.
  • the stator core 10 has teeth 12A and teeth 12B.
  • the width W2 of the axial end of the teeth 12A is narrow, but the width W1 of the axial end of the teeth 12B is wide. Therefore, an increase in iron loss can be suppressed while reducing the circumferential length of the coil 20.
  • the teeth 12B are located at the center of the three teeth 12 around which the coils 20 are wound.
  • the tooth 12B is located at the center of the three teeth 12 that the coil 20U straddles.
  • the magnetic flux generated by the current flowing through the coil 20 is concentrated on the central teeth 12B. Since the teeth 12B do not have a stepped portion S and have a wide width W1 even at the axial ends of the teeth 12B, an increase in magnetic flux density is suppressed. Thereby, the effect of reducing iron loss can be enhanced and the motor efficiency can be improved.
  • the teeth 12A have stepped portions S on both sides in the circumferential direction.
  • a coil 20 of a certain phase for example, coil 20U
  • a coil 20 of another phase that passed through the slot 13 on the other side in the circumferential direction
  • a coil (20V) is also wound. Therefore, by utilizing the stepped portion S in which the teeth 12A are provided on both sides in the circumferential direction, the circumferential lengths of the coils 20 of both phases can be shortened.
  • the coil 20 is wound here so as to straddle three teeth 12 (that is, two teeth 12A and one tooth 12B), the number N of teeth 12 that the coil 20 straddles is 3 or more. good. Teeth 12A having stepped portions S at both ends of the N teeth 12 may be provided, and teeth 12B having no stepped portion S may be provided between these.
  • the three-phase coils 20U, 20V, and 20W can be arranged evenly in the circumferential direction as shown in FIG. Moreover, by arranging the teeth 12A and the teeth 12B alternately in the circumferential direction, the circumferential length of the coil 20 can be shortened as described above, and an increase in iron loss can be suppressed.
  • the stator 1 of the first embodiment includes the stator core 10 and the winding 2.
  • Stator core 10 includes an annular yoke 11, teeth 12A and 12B extending radially inward from yoke 11, and slots 13 formed between them.
  • the winding 2 is wound so that one coil 20 is accommodated in the slot 13, and the coil 20 passes through the slot 13 and is bent toward the teeth 12A.
  • the teeth 12A have a stepped portion S at the axial end, and the teeth 12B do not have a stepped portion S at the axial end.
  • the teeth 12A have the stepped portion S in this manner, the height H of the coil end 202 of the coil 20 can be reduced, and the circumferential length of the coil 20 can be shortened.
  • the teeth 12B do not have a stepped portion S and have a wide width W1 even at the axial ends, it is possible to suppress an increase in magnetic flux density and reduce iron loss. That is, the circumferential length of the coil 20 can be shortened and an increase in iron loss can be suppressed.
  • the teeth 12B are located at the center in the circumferential direction of the N teeth 12 (N is an integer of 3 or more) that are spanned by one coil 20, a wide magnetic path width is ensured in the area where the magnetic flux is concentrated. Iron loss can be reduced.
  • FIG. 9 is a schematic diagram of the stator 1A of the second embodiment viewed from the inner peripheral side.
  • the stator core 10 of the stator 1A has teeth 12A and teeth 12B as described in the first embodiment.
  • the insulating film 31 described with reference to FIG. 4 is provided in the slot 13 of the stator 1A.
  • the axial length of the insulating film 31 is longer than the axial length L1 of the teeth 12.
  • the axial end of the insulating film 31 is referred to as a film end 31e.
  • the film ends 31e of the insulating film 31 on both sides of the teeth 12A are bent at an acute angle toward the teeth 12A.
  • the bent film end portion 31e is accommodated in the space formed by the stepped portion S of the teeth 12A.
  • the film ends 31e of the insulating film 31 on both circumferential sides of the teeth 12B are bent at an obtuse angle toward the teeth 12A so as not to interfere with the coil ends 202 of the coil 20 (FIG. 10(B)).
  • FIGS. 10A and 10B are schematic diagrams showing the surroundings of the slots 13 in the stator 1E of Comparative Example 3 and the stator 1A of Embodiment 2.
  • the stator 1E of the comparative example all the teeth 12 of the stator core 10 are constituted by teeth 12B that do not have a stepped portion S.
  • the coil 20 and teeth 12 are insulated by an insulating film 31 and an insulator 32. If there is a part between the coil 20 and the teeth 12 where the insulating film 31 or the insulator 32 is not present, it is necessary to provide a distance D between the coil 20 and the teeth 12 as specified in the Electrical Appliance and Material Safety Act. .
  • the thickness of the insulator 32 on the teeth 12 is set so that the coil end 202 is separated by a distance D from the end surface 12e of the teeth 12. There is. Further, the insulating film 31 protrudes from the slot 13 in the axial direction and is bent toward the end surface 12e of the teeth 12.
  • the coil end 202 may be spaced apart from the stepped portion S of the teeth 12 by a distance D. Further, the insulating film 31 accommodates the film end 31e in the space created by the step S by bending the film end 31e toward the step S of the teeth 12A. Thereby, the insulating film end portion 31e can be accommodated inside the slot 13.
  • the height from the end surface 12e of the teeth 12A to the coil end 202 can be lower than that of the stator 1E of the third comparative example shown in FIG. 10(A).
  • the insulating film 31 on the teeth 12B side only needs to be bent to the extent that it does not get in the way of the coil end 202 passing over the end surface 12e of the teeth 12B.
  • a portion of the insulator 32 on the teeth 12A be engaged with the stepped portion S of the teeth 12A.
  • the wall portion 32d shown in FIG. 4 engages with the stepped portion S of the teeth 12A.
  • the stator 1A of the second embodiment is configured in the same manner as the stator 1 of the first embodiment except for the above points.
  • the teeth 12A have the step S, the film end 31e of the insulating film 31 is bent toward the step S of the tooth 12A, and the space created by the step S is housed in. Therefore, the coil end 202 can be brought closer to the end surface 12e of the teeth 12A, and thereby the circumferential length of the coil 20 can be shortened.
  • FIG. 11 is a plan view showing a part of the stator 1B of the third embodiment.
  • Stator core 10 of stator 1B has teeth 12A and teeth 12B as described in the first embodiment.
  • the stator core 10 of the stator 1B further has a through hole 16 in the yoke 11.
  • the through hole 16 of the yoke 11 is formed on the radially outer side of the teeth 12B that do not have the stepped portion S.
  • the through hole 16 is used, for example, as a refrigerant passage through which refrigerant from a compressor passes.
  • the magnetic path becomes narrow at the location where the through hole 16 is formed.
  • the teeth 12A have the stepped portions S, the width W2 of the axial end portions of the teeth 12A is narrow. Therefore, if the through holes 16 are formed on the radially outer side of the teeth 12A, the magnetic flux density may increase at the portion where the magnetic flux flows from the teeth 12A to the yoke 11, and iron loss may increase.
  • the width W1 of the axial end portions of the teeth 12B is wide. Therefore, even if the through holes 16 are formed on the radially outer side of the teeth 12B, the magnetic flux density is difficult to increase even in the portion where the magnetic flux flows from the teeth 12B to the yoke 11. Therefore, an increase in iron loss can be suppressed.
  • the through hole 16 does not need to be formed on the radially outer side of all the teeth 12B of the stator core 10, but only needs to be formed on the radially outer side of at least one tooth 12B.
  • the stator 1B of the third embodiment is configured similarly to the stator 1 of the first embodiment except for the above points. Note that the insulating film 31 of the second embodiment may be used in the stator 1B of the third embodiment.
  • the stator core 10 has the through holes 16 on the radially outer side of the teeth 12B, so that an increase in magnetic flux density due to the formation of the through holes 16 is suppressed, and an increase in iron loss is suppressed. can do.
  • FIG. 12 is a sectional view showing the compressor 300.
  • Compressor 300 is a scroll compressor here, but is not limited to this.
  • the compressor 300 includes a compression mechanism 310, an electric motor 100 that drives the compression mechanism 310, a rotating shaft 60 that connects the compression mechanism 310 and the electric motor 100, and a sub-shaft that supports the lower end (secondary shaft) of the rotating shaft 60. It has a frame 303 and a closed container 301 in which these are housed. Refrigerating machine oil 304 is stored in an oil reservoir 305 at the bottom of the airtight container 301 .
  • the compression mechanism 310 includes a fixed scroll 311, an oscillating scroll 312, an Oldham ring 313, a compliant frame 314, and a guide frame 315.
  • the fixed scroll 311 and the swinging scroll 312 both have plate-shaped spiral teeth and are combined to form a compression chamber 316.
  • the fixed scroll 311 has a discharge port 317 that discharges the refrigerant compressed in the compression chamber 316. Furthermore, a suction pipe 306 that penetrates the closed container 301 is press-fitted into the fixed scroll 311 . Further, a discharge pipe 307 is provided so as to penetrate the closed container 301 and discharge high-pressure refrigerant gas discharged from the discharge port 317 of the fixed scroll 311 to the outside.
  • the electric motor 100 is installed inside the sealed container 301 by shrink fitting. Further, a glass terminal 308 for electrically connecting the stator 1 of the electric motor 100 and the drive circuit is fixed to the sealed container 301 by welding.
  • the rotating shaft 60 is rotatably supported by bearings provided on the compliant frame 314 and the subframe 303, respectively.
  • the operation of the compressor 300 is as follows.
  • the rotating shaft 60 rotates together with the rotor 5.
  • the swinging scroll 312 swings, changing the volume of the compression chamber 316 between the fixed scroll 311 and the swinging scroll 312. Thereby, refrigerant gas is sucked into the compression chamber 316 from the suction pipe 306 and compressed.
  • the high-pressure refrigerant gas compressed within the compression chamber 316 is discharged from the discharge port 317 of the fixed scroll 311 into the closed container 301 and is discharged from the discharge pipe 307 to the outside. Further, a part of the refrigerant gas discharged from the compression chamber 316 into the closed container 301 passes through a hole provided in the electric motor 100 and cools the electric motor 100.
  • the circumferential length of the coil 20 can be shortened while suppressing an increase in iron loss. Therefore, the operating efficiency of compressor 300 can be improved.
  • FIG. 13 is a diagram showing the configuration of the refrigeration cycle device 400.
  • the refrigeration cycle device 400 includes a compressor 401, a condenser 402, a throttle device (pressure reducing device) 403, and an evaporator 404.
  • Compressor 401, condenser 402, throttle device 403, and evaporator 404 are connected by refrigerant piping 407 to constitute a refrigeration cycle. That is, the refrigerant circulates in the order of compressor 401, condenser 402, expansion device 403, and evaporator 404.
  • a compressor 401, a condenser 402, and a throttle device 403 are provided in an outdoor unit 410.
  • Compressor 401 is comprised of compressor 300 described with reference to FIG.
  • the outdoor unit 410 is provided with an outdoor blower 405 that blows air to the condenser 402 .
  • Evaporator 404 is provided in indoor unit 420.
  • This indoor unit 420 is provided with an indoor blower 406 that blows air to the evaporator 404 .
  • the operation of the refrigeration cycle device 400 is as follows. Compressor 401 compresses the refrigerant it sucks in and sends it out.
  • the condenser 402 exchanges heat between the refrigerant flowing from the compressor 401 and outdoor air, condenses and liquefies the refrigerant, and sends the refrigerant to the refrigerant pipe 407 .
  • Outdoor blower 405 supplies outdoor air to condenser 402 .
  • the expansion device 403 adjusts the pressure of the refrigerant flowing through the refrigerant pipe 407 .
  • the evaporator 404 exchanges heat between the refrigerant brought into a low pressure state by the expansion device 403 and indoor air.
  • the refrigerant absorbs heat from the air, evaporates, and is sent to the refrigerant pipe 407.
  • the indoor blower 406 supplies air from which heat has been removed by the refrigerant in the evaporator 404 into the room.
  • the circumferential length of the coil 20 can be shortened while suppressing an increase in iron loss. Therefore, by using the electric motor 100 for the compressor 401 of the refrigeration cycle device 400, the operating efficiency of the refrigeration cycle device 400 can be improved.

Abstract

Ce stator comprend : une culasse qui s'étend dans la direction circonférentielle autour de l'axe ; un noyau de stator qui a des première et seconde dents s'étendant à partir de la culasse vers l'intérieur dans la direction radiale autour de l'axe et une fente formée entre la première dent et la seconde dent ; et un enroulement qui est enroulé autour du noyau de stator et a une bobine traversant la fente et courbée vers le côté de la première dent. La première dent a une partie étagée au niveau de la partie d'extrémité dans la direction de l'axe, et la seconde dent n'a pas la partie étagée au niveau de la partie d'extrémité dans la direction de l'axe.
PCT/JP2022/013872 2022-03-24 2022-03-24 Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération WO2023181238A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/013872 WO2023181238A1 (fr) 2022-03-24 2022-03-24 Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/013872 WO2023181238A1 (fr) 2022-03-24 2022-03-24 Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération

Publications (1)

Publication Number Publication Date
WO2023181238A1 true WO2023181238A1 (fr) 2023-09-28

Family

ID=88100619

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/013872 WO2023181238A1 (fr) 2022-03-24 2022-03-24 Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération

Country Status (1)

Country Link
WO (1) WO2023181238A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010124637A (ja) * 2008-11-21 2010-06-03 Hitachi Ltd 回転電機および回転電機の製造方法
JP2017169248A (ja) * 2016-03-14 2017-09-21 本田技研工業株式会社 ステータコア
WO2017175330A1 (fr) * 2016-04-06 2017-10-12 三菱電機株式会社 Moteur électrique, souffleuse d'air, compresseur et dispositif de conditionnement d'air
WO2020240735A1 (fr) * 2019-05-29 2020-12-03 三菱電機株式会社 Moteur électrique et compresseur équipé celui-ci

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010124637A (ja) * 2008-11-21 2010-06-03 Hitachi Ltd 回転電機および回転電機の製造方法
JP2017169248A (ja) * 2016-03-14 2017-09-21 本田技研工業株式会社 ステータコア
WO2017175330A1 (fr) * 2016-04-06 2017-10-12 三菱電機株式会社 Moteur électrique, souffleuse d'air, compresseur et dispositif de conditionnement d'air
WO2020240735A1 (fr) * 2019-05-29 2020-12-03 三菱電機株式会社 Moteur électrique et compresseur équipé celui-ci

Similar Documents

Publication Publication Date Title
JP6742402B2 (ja) 電動機、圧縮機、及び冷凍サイクル装置
US11804739B2 (en) Motor having stator and rotor configured to reduce eddy current loss, and compressor and air conditioner incorporating same
JP6942246B2 (ja) ロータ、電動機、圧縮機および空気調和装置
JP7023408B2 (ja) モータ、圧縮機および空気調和装置
US11108293B2 (en) Stator, motor, compressor, and air conditioner
JPWO2019043850A1 (ja) ロータ、電動機、圧縮機および空気調和装置
JP2023168510A (ja) 電動機、圧縮機、送風機、及び冷凍空調装置
WO2023181238A1 (fr) Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération
WO2020021693A1 (fr) Moteur électrique, compresseur, et climatiseur
WO2024004202A1 (fr) Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération
WO2023233629A1 (fr) Stator, moteur électrique, compresseur et dispositif à cycle de réfrigération
WO2023112078A1 (fr) Stator, moteur, compresseur et dispositif à cycle de réfrigération
WO2022153362A1 (fr) Stator, moteur, compresseur et dispositif à cycle de réfrigération
JP7286019B2 (ja) 固定子、電動機、圧縮機、冷凍サイクル装置及び空気調和装置
JP7292424B2 (ja) モータ、圧縮機および空気調和装置
JP7450805B2 (ja) モータ、圧縮機および冷凍サイクル装置
US11949291B2 (en) Motor having rotor with different core regions, compressor, and air conditioner having the motor
WO2022113346A1 (fr) Stator, moteur, compresseur et dispositif à cycle de réfrigération
WO2024089866A1 (fr) Stator, moteur électrique, compresseur et appareil à cycle de réfrigération
CN110366809B (zh) 旋转电机、压缩机以及制冷循环装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22933379

Country of ref document: EP

Kind code of ref document: A1