GB2553463A - Rotary motor and compressor - Google Patents
Rotary motor and compressor Download PDFInfo
- Publication number
- GB2553463A GB2553463A GB1716742.0A GB201716742A GB2553463A GB 2553463 A GB2553463 A GB 2553463A GB 201716742 A GB201716742 A GB 201716742A GB 2553463 A GB2553463 A GB 2553463A
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- United Kingdom
- Prior art keywords
- winding
- inclination angle
- wall
- core
- wall portion
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 202
- 239000012212 insulator Substances 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000010030 laminating Methods 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 238000003475 lamination Methods 0.000 description 12
- 229910000576 Laminated steel Inorganic materials 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Compressor (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The rotary motor installed in the compressor has a spindle, a rotor through which the spindle is inserted, and a stator that is annularly disposed on the outer peripheral side of the rotor. The stator has a core that is formed by laminating multiple electromagnetic steel plates, insulators that are respectively disposed on one end and the other end in the axial direction of the core, and a coil that is formed by winding a conductive wire between the insulator on the one end and the insulator on the other end via the core. Each of the insulators has a winding part around which the conductive wire is radially wound and an outer wall part that is disposed on the outer diameter side of the winding part, with the inner surface thereof being tilted toward the outer diameter side by a preset tilt angle with respect to the axial direction in a pre-winding state.
Description
(54) Title of the Invention: Rotary motor and compressor Abstract Title: Rotary motor and compressor (57) The rotary motor installed in the compressor has a spindle, a rotor through which the spindle is inserted, and a stator that is annularly disposed on the outer peripheral side of the rotor. The stator has a core that is formed by laminating multiple electromagnetic steel plates, insulators that are respectively disposed on one end and the other end in the axial direction of the core, and a coil that is formed by winding a conductive wire between the insulator on the one end and the insulator on the other end via the core. Each of the insulators has a winding part around which the conductive wire is radially wound and an outer wall part that is disposed on the outer diameter side of the winding part, with the inner surface thereof being tilted toward the outer diameter side by a preset tilt angle with respect to the axial direction in a prewinding state.
1/10
FIG. 2
PlkX □
3/10
FIG. 4
Γ”ί £“
ΓΙΟ. Ο
EQUAL TO OR
SMALLER ΤΙ ΙΑΝ Ν 90 DEGREES .Λ.
4/10
Γ” I Ζ’Χ /χ
FIG, 6
EQUAL TO OR SMALLER THAN
5/10
EQUAL TO OR
SMALLER THAN
DEGREES
EQUAL TO OR
SMALLER THAN
DEGREES
6/10
383b iSt? 383
FIG. 11
EQUAL TO OR LARGER THAN 90 DEGREES
7/10
482
480
FIG. 13
EQUAL TO OR SMALLER THAN 90 DEGREES
• 480
8/10 a
DEGREES^
DEGREES
STATOR INNER! DIAMETER: φΐ!
STATOR OUTER ·
DIAMETER: φο
9/10
Γ ι >ί
FIG. 15
983
10/10
FIG. 16
983
TS
DESCRIPTION
Title of Invention
ROTARY ELECTRIC MOTOR AND COMPRESSOR
Technical Field [0001]
The present invention relates to a rotary electric motor having a stator including a core formed by a laminated steel plate and to a compressor.
Background Art [0002]
In recent years, a series-wound electric motor that is a brushless DC motor is frequently used as a rotary electric motor to achieve downsizing and high performance. The rotary electric motor has a stator including a core formed by a laminated steel plate on an outer periphery side of a rotator into which a main shaft is inserted. A compressor using the rotary electric motor as a power source is increasingly required to improve reliability in view of further enhancement of performance, enhancement of a heat resistance, and enhancement of an oil resistance and a refrigerant resistance to refrigerating machine oil and refrigerant. It is generally known that improvement of a space factor of a coil is effective to improve the reliability of the compressor. As a method for improving the space factor, regular winding for winding a conductive wire that forms the coil around an insulator in a regularly aligned manner is known (for example, see Patent Literatures 1 to 4).
[0003]
For the regular winding, it is important to control movement of the conductive wire and the laminated steel plate that rotate at a high speed with high accuracy to ensure productivity. In Patent Literature 1, there is disclosed a winding method for regulating the movement of the conductive wire by forming guide grooves serving as winding guides on the insulator. In Patent Literature 2, a technique of lap-winding the conductive wire around a stator core is disclosed.
[0004]
Further, an insulator disclosed in Patent Literature 3 is formed such that an inner wall portion formed on an inner-diameter side end portion of a projecting portion that projects toward an inner diameter side is inclined to an outer diameter side during winding by forming a concave portion on a surface of the projecting portion that is opposed to a core. Further, as disclosed in Patent Literature 4, there is also known a technology of adjusting a tensile force during the winding to reduce a contact force between the conductive wire that is being wound and the insulator and thus damage to an insulating coating of the conductive wire, thereby achieving improvement of reliability.
Citation List
Patent Literature [0005]
Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2006-115565
Patent Literature 2: Japanese Patent No. 478888
Patent Literature 3: Japanese Unexamined Patent Application Publication No. 2013-162619
Patent Literature 4: Japanese Unexamined Patent Application Publication No. 2010-200396
Summary of Invention
Technical Problem [0006]
The core of the stator is formed by the laminated steel plate as described above. Consequently, there occurs tight winding in which a lamination thickness of the core is reduced in an axial direction of the core due to a tensile force applied during the winding of the coil. In the configurations disclosed in Patent Literatures 1 to 4, however, an outer wall portion of the insulator follows a change of the lamination thickness of the core caused in the tight winding to be inclined to the inner diameter side with respect to a plane perpendicular to a radial direction of the core. Consequently, when the conductive wire that forms the coil is wound in a periphery of the outer wall portion, the conductive wire collides against or comes into contact with the outer wall portion to result in a situation in which the regular winding is obstructed or a situation in which the insulating coating of the conductive wire is damaged. Consequently, it is desired to prevent the outer wall portion of the insulator from obstructing the winding of the coil.
[0007]
The present invention has been made in view of the problem described above, and has an object to provide a rotary electric motor and a compressor that prevent an outer wall portion of an insulator from obstructing winding of a coil.
Solution to Problem [0008]
According to one embodiment of the present invention, there is provided a rotary electric motor, including a main shaft, a rotator into which the main shaft is inserted, and a stator annularly provided on an outer periphery side of the rotator, the stator including a core formed by laminating a plurality of electromagnetic steel plates, insulators each provided to one axial end and the other axial end of the core, and a coil formed by winding a conductive wire, through the core, between the insulator provided at the one axial end of the core and the insulator provided at the other axial end of the core, each of the insulators including a winding portion in which the conductive wire is wound in a radial direction of the stator, and an outer wall portion provided on an outer diameter side of the winding portion and including an inner surface inclined to the outer diameter side at a set outer inclination angle with respect to an axial direction of the main shaft in a state before the winding.
Advantageous Effects of Invention [0009]
According to one embodiment of the present invention, each of the plurality of insulators has the outer wall portion inclined to the outer diameter side at the preset outer inclination angle from the axial direction before the winding. Thus, even when the insulator follows a change of a lamination thickness of the core caused in the tight winding to be inclined to the inner diameter side, the outer wall portion is inclined to the outer diameter side by an amount corresponding to the outer inclination angle. Consequently, the outer wall portion of each of the insulators can be prevented from obstructing the winding of the coil.
Brief Description of Drawings [0010] [Fig. 1] Fig. 1 is a longitudinal sectional view for schematically illustrating a compressor according to Embodiment 1 of the present invention.
[Fig. 2] Fig. 2 is a longitudinal sectional view for schematically illustrating a rotary electric motor included in the compressor of Fig. 1.
[Fig. 3] Fig. 3 is a transverse sectional view taken along the line A-A of Fig. 2.
[Fig. 4] Fig. 4 is a longitudinal sectional view for schematically illustrating a structure of a stator included in the rotary electric motor of Fig. 1 in a state before winding.
[Fig. 5] Fig. 5 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the rotary electric motor of Fig. 1 in a state after the winding.
[Fig. 6] Fig. 6 is a longitudinal sectional view for schematically illustrating a structure of a stator included in a compressor according to Embodiment 2 of the present invention in a state before winding.
[Fig. 7] Fig. 7 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the compressor according to Embodiment 2 of the present invention in a state after the winding.
[Fig. 8] Fig. 8 is a longitudinal sectional view for schematically illustrating a structure of a stator included in a compressor according to Embodiment 3 of the present invention in a state before winding.
[Fig. 9] Fig. 9 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the compressor according to Embodiment 3 of the present invention in a state after the winding.
[Fig. 10] Fig. 10 is a longitudinal sectional view for schematically illustrating a structure of a stator included in a compressor according to Embodiment 4 of the present invention in a state before winding.
[Fig. 11] Fig. 11 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the compressor according to Embodiment 4 of the present invention in a state after the winding.
[Fig. 12] Fig. 12 is a longitudinal sectional view for schematically illustrating a structure of a stator included in a compressor according to Embodiment 5 of the present invention in a state before winding.
[Fig. 13] Fig. 13 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the compressor according to Embodiment 5 of the present invention in a state after the winding.
[Fig. 14] Fig. 14 is a longitudinal sectional view for schematically illustrating a structure of a stator included in a related-art compressor in a state before winding.
[Fig. 15] Fig. 15 is a longitudinal sectional view for schematically illustrating the structure of the stator included in the related-art compressor in a state after the winding.
[Fig. 16] Fig. 16 is a longitudinal sectional view for illustrating a problem relating to an inner wall portion and an outer wall portion of a rotator of Fig. 15.
[Fig. 17] Fig. 17 is a longitudinal sectional view for illustrating a problem relating to a winding portion of the rotator of Fig. 15.
Description of Embodiments [0011] [Embodiment 1]
Fig. 1 is a longitudinal sectional view for schematically illustrating a compressor according to Embodiment 1 of the present invention. A compressor 10 is, for example, a scroll compressor, which is one of components of a refrigeration cycle used for various industrial machines including a refrigerator, a freezer, an airconditioning apparatus, a refrigeration apparatus, and a water heater. The compressor 10 is configured to suck refrigerant circulated through the refrigeration cycle, compress the refrigerant into a high temperature and high pressure state, and discharge the refrigerant.
[0012]
As illustrated in Fig. 1, the compressor 10 includes a hermetic container 20 constructing an outer shell, a suction pipe 30 configured to suck refrigerant gas into the hermetic container 20, and a discharge pipe 40 configured to discharge the compressed refrigerant gas. The compressor 10 includes, inside the hermetic container 20, a compression mechanism unit 50 configured to compress refrigerant, a rotary electric motor 60 configured to rotationally drive a main shaft 21 to drive the compression mechanism unit 50, and an oil pump 22 provided to an end portion of the main shaft 21 on the rotary electric motor 60 side, and immersed in lubricating oil 22a. The hermetic container 20 is formed by a hermetic shell or a casing, and is configured to accommodate the compression mechanism unit 50 and the rotary electric motor 60. The main shaft 21 is rotationally driven by the rotary electric motor 60.
[0013]
The compression mechanism unit 50 includes a fixed scroll 51 including a fixed spiral body 51a and an orbiting scroll 52 including an orbiting spiral body 52a. The rotary electric motor 60 includes a rotator 61 into which the main shaft 21 is inserted and a stator 70 annularly formed on an outer periphery side of the rotator 61. The stator 70 includes a core 71 formed by laminating a plurality of electromagnetic steel plates, an insulator 80 each provided to one axial end and the other axial end of the core 71, and a coil 72 formed by winding a conductive wire between the insulator 80 provided at the one end and the insulator 80 provided at the other end through the core 71. The core 71 is a laminated steel plate, and is formed by laminating the plurality of electromagnetic steel plates. The conductive wire that forms the coil 72 is formed by, for example, a magnet wire, and has a surface covered with an insulating coating (not shown).
[0014]
Further, the compressor 10 includes a sealed terminal 24 that is welded to the hermetic container 20 and extracts lead wires 23 from the stator 70 of the rotary electric motor 60 to outside of the hermetic container 20 to be electrically connected to an external power supply. Although a vertical installation type hermetic scroll compressor is exemplified as the compressor 10 in Fig. 1, a horizontal installation type may be adopted. Further, a vane-type compressor may also be adopted as the compressor 10.
[0015]
Next, an operation of the compressor 10 is described. When the sealed terminal 24 is energized, the stator 70 and the rotator 61 generate a torque to rotate the main shaft 21. With the rotation of the main shaft 21, the orbiting scroll 52 coupled to the main shaft 21 starts rotating to start compression of the refrigerant gas in cooperation with the fixed scroll 51. At this time, the refrigerant gas is sucked from the suction pipe 30 to flow into the hermetic container 20 to be sucked into the compression mechanism unit 50 including the fixed scroll 51 and the orbiting scroll 52. The refrigerant gas is compressed in the compression mechanism unit 50 and then is discharged into a refrigerant circuit outside of the hermetic container 20 through the discharge pipe 40. Further, with the rotation of the main shaft 21, the oil pump 22 is driven to suck the lubricating oil 22a. The lubricating oil 22a is fed through an oil feed passage 21a formed inside the main shaft 21 to lubricate each bearing and other components, and then returns to a bottom portion of the hermetic container 20 again.
[0016]
Next, with reference to Fig. 2 and Fig. 3, the rotator 61 and the stator 70 that construct the rotary electric motor 60 are described further in detail. Fig. 2 is a longitudinal sectional view for schematically illustrating the rotary electric motor 60 included in the compressor 10. Fig. 3 is a transverse sectional view taken along the line A-A of Fig. 2. The stator 70 includes the core 71 having an annular shape formed by laminating the electromagnetic steel plates made of a high permeability material such as iron. The core 71 includes a back yoke portion 71a having an annular shape, and a plurality of tooth portions 71b projecting from the back yoke portion 71 a to an inner diameter side. The plurality of tooth portions 71 b are arranged along a circumferential direction of the core 71. The insulator 80 formed by resin molding is each arranged at one axial end and the other axial end of each of the tooth portions 71b. The coil 72 is wound around the insulators 80. The lead wires 23 serving as connection lines to a power supply are connected to the coil 72. The coil 72 is wound around the tooth portions 71b through winding portions 81 (see Fig.
4) of the insulators 80.
[0017]
The rotator 61 includes a boss 61a formed by laminating steel plates made of a a high permeability material such as iron, magnet insertion holes 61b arranged to correspond to the number of magnetic poles in a circumferential direction of the rotator 61 along an outer periphery of the boss 61a, permanent magnets 61c that are embedded in the magnet insertion holes 61b and form field magnetic poles of the rotary electric motor 60, and end plates 61 d that are formed by non-magnetic members and are provided at both axial end portions of the boss 61a. Further, the rotator 61 includes a balance weight 61 e provided on the end plate 61 d at one axial end portion or the both axial end portions of the boss 61a, and rivets 61 f passing through the boss 61a, the end plates 61 d, and the balance weight 61 e. Specifically, in the rotator 61, the end plates 61 d, the boss 61 a, and the balance weight 61 e are fastened by the rivets 61 f.
[0018]
Next, with reference to Fig. 4 and Fig. 5, a configuration of each of the insulators 80 is specifically described. Fig. 4 is a longitudinal sectional view for schematically illustrating a structure of the stator 70 included in the rotary electric motor 60 in a state before winding. The insulators 80 are configured to insulate the coil 72 and the tooth portions 71b from each other, and each include the winding portion (insulator tooth portion) 81 around which the conductive wire that forms the coil 72 is wound in a radial direction of the stator 70. Further, each of the insulators 80 includes an inner wall portion 82 and an outer wall portion 83 extending in a direction away from the core 71 and each provided on a corresponding one of an inner diameter side and an outer diameter side of the tooth portion 71b. In Embodiment 1, the winding portion 81 and the inner wall portion 82 are held in contact with each other, while the winding portion 81 and the outer wall portion 83 are also held in contact with each other.
[0019]
The inner wall portion 82 is configured to prevent the coil 73 from collapsing to the inner diameter side, whereas the outer wall portion 83 is configured to prevent the coil 73 from collapsing to the outer diameter side. Consequently, an axial height of the inner wall portion 82 and an axial height of the outer wall portion 83 are larger than that of the winding portion 81. For the height of the inner wall portion 82 and the height of the outer wall portion 83, the outer wall portion 83 is generally frequently set larger than the inner wall portion 82. Although a similar configuration is illustrated in Fig. 4 and Fig. 5, the heights are not limited to this configuration. Specifically, for example, the inner wall portion 82 and the outer wall portion 83 may be set to have an equal height, or the inner wall portion 82 may be set larger in height than the outer wall portion 83. The outer wall portion 83 is formed on the outer diameter side of the winding portion 81, and is inclined to the outer diameter side at a preset outer inclination angle θ0 in an axial direction of the main shaft 21 in the state before the conductive wire is wound (before winding). Specifically, the outer wall portion 83 is inclined at the outer inclination angle θ0 with respect to a plane S perpendicular to the radial direction. The outer inclination angle θ0 is set to be equal to or larger than a reference inclination angle Θμαχ calculated on the basis of a laminate thickness and the number of laminated layers of the core 71 and an outer diameter and an inner diameter of the stator 70.
[0020]
Fig. 5 is a longitudinal sectional view for schematically illustrating the structure of the stator 70 included in the rotary electric motor 60 in a state after the winding.
The core 71 after the winding has a laminate thickness decreased toward the inner diameter side due to tight winding occurring during the winding to form an inclination angle 0 with respect to a plane T (contact surface between the core 71 and the insulator 80 before the winding) perpendicular to the axial direction.
[0021]
The inclination angle 0 and the reference inclination angle Omax are described below. The amount of tight winding of the core 71 does not become equal to or larger than a sum of inter-lamination gaps in the core 71 formed by the laminated steel plate. Thus, the reference inclination angle Omax being a maximum value of the inclination angle 0 can be calculated by Expression 1.
[0022] [Math 1]
J /7 ™ (Λ' -Ι)χβ [0023]
In Expression 1, H [mm] is a laminate thickness of the core 71 being the laminated steel plate. X [number] is the number of laminated electromagnetic steel plates constructing the core 71. σ [mm] is a gap between the laminated electromagnetic steel plates (inter-lamination gap). φ0 [mm] is the outer diameter of the stator 70, and φί [mm] is the inner diameter of the stator 70. The outer inclination angle 0o of Embodiment 1 is set with the reference inclination angle Omax calculated with Expression 1 as a lower limit value (0o Omax) to prevent contact between the conductive wire that forms the coil 72 and the insulator 80. The inclination angle 0 is equal to or smaller than the reference inclination angle 0max(0 < Omax).
[0024]
When the core 71 is inclined at the inclination angle 0 due to the tight winding, the outer wall portion 83 follows the inclination of the core 71 to be inclined to the inner diameter side at the inclination angle Θ. However, the outer wall portion 83 of Embodiment 1 has a shape having an inclination corresponding to the outer inclination angle θ0 equal to or larger than the reference inclination angle Θμαχοπ the outer diameter side before the winding. Consequently, the outer wall portion 83 is not positioned on a turning trajectory of the conductive wire. Specifically, as illustrated in Fig. 5, an angle formed between the plane T perpendicular to the axial direction and an inner diameter-side side surface (inner surface) of the outer wall portion 83 becomes 90 degrees or smaller. Consequently, during the winding with regular winding, the conductive wire wound in the vicinity of the outer wall portion 83 can be prevented from coming into contact with the outer wall portion 83.
[0025]
As described above, in the rotary electric motor 60, each of the plurality of insulators 80 includes the outer wall portion 83 inclined to the outer diameter side at the outer inclination angle θ0 with respect to the axial direction before the winding. Consequently, even when the insulator 80 follows a change of the laminate thickness of the core caused by the tight winding to be inclined to the inner diameter side, the outer wall portion 83 is inclined to the outer diameter side by an amount corresponding to the outer inclination angle θ0. Thus, the outer wall portion 83 can be prevented from obstructing the winding of the coil 72. Consequently, with the rotary electric motor 60, irregular winding and damage to the insulating coating on the surface of the conductive wire caused by collision between the conductive wire wound around the winding portion 81 and the outer wall portion 83 can be prevented. [0026]
Specifically, with the rotary electric motor 60 and the compressor 10, the regular winding with high accuracy can be achieved. Consequently, improvement of motor efficiency can be achieved. Further, the conductive wire and the outer wall portion 83 do not come into contact with each other, and hence a winding speed can be increased. Thus, improvement of productivity can be achieved. Still further, manufacturing degradation of the insulating coating of the conductive wire can be reduced, and hence improvement of the reliability can be achieved.
[0027]
In the compressor 10 in which the rotary electric motor 60 is mounted, a temperature environment inside the compressor 10 is affected by the refrigerant gas, heat generation from the stator 70, and other factors. A temperature inside the compressor 10 becomes -50 degrees Celsius to 150 degrees Celsius depending on operating conditions. Thus, the reliability is required to be ensured in a broad temperature zone. For the conductive wire of the coil 72 covered with the insulating coating made mainly of a resin material, it is essential to ensure the reliability, in particular, at a high temperature. Thus, the damage to the insulating coating during the winding needs to be prevented.
[0028]
In particular, in view of a current refrigerant trend, when refrigerant mixture containing HFO-1123 having higher temperature and higher pressure rise properties during compression than those of the R410A refrigerant, the R407C refrigerant, the R404A refrigerant, and other kinds of refrigerant that are conventionally used, for example, the HFC-32 refrigerant is used, a temperature rise inside the compressor 10 is required to be coped with. Thus, the improvement of the motor efficiency through the regular winding with high accuracy and the improvement of the reliability by reducing the damage to the insulating coating during the winding are required.
[0029]
In this regard, in the rotary electric motor 60 and the compressor 10 according to Embodiment 1, the outer wall portion 83 is inclined in advance at the outer inclination angle θ0 in consideration of deformation of the core 71 caused by the winding. Thus, the regular winding can be achieved with high accuracy. Consequently, the improvement of the motor efficiency can be achieved. Further, the damage to the insulating coating during the winding can be prevented, and hence the reliability is improved. Consequently, for the compressor 10, single component refrigerant of HFO-1123, the refrigerant mixture containing HFO-1123, and other kinds of refrigerant may be used as the refrigerant circulated through the refrigeration cycle. [0030]
In the example illustrated in Fig. 4 and Fig. 5, the whole outer wall portion 83 forms the outer inclination angle θ0. However, only the inner-diameter side side surface (contact surface with the coil 72) of the outer wall portion 83 may form the outer inclination angle θ0. Specifically, a cross section of the outer wall portion 83 may be formed to have, for example, a tapered shape. Further, the inner-diameter side side surface of the outer wall portion 83 may be a curved surface warped toward the outer diameter side. Even by adopting each of the configurations described above, the contact between the conductive wire that forms the coil 72 and the insulator 80 can be prevented.
[0031]
Further, only a portion of the inner-diameter side side surface of the outer wall portion 83 that collides against the conductive wire that forms the coil 72 may form the outer inclination angle θ0. Specifically, for example, a different inclination angle may be formed between a distal end portion of the outer wall portion 83 and a contact portion with the coil 72. Further, the inner-diameter side side surface and the outerdiameter side side surface of the outer wall portion 83 may be curved surfaces.
Even in this manner, the collision between the conductive wire and the insulator 80 can be prevented. However, a thickness of the outer wall portion 83 is required to be set in consideration of strength allowing resistance to a tensile force generated during the winding, mold releasability and burn at the time of molding, and other factors. [0032] [Embodiment 2]
Subsequently, a rotary electric motor according to Embodiment 2 of the present invention is described with reference to Fig. 6 and Fig. 7. Fig. 6 and Fig. 7 are longitudinal sectional views for schematically illustrating a structure of a stator included in a compressor according to Embodiment 2 in a state before the winding and in a state after the winding, respectively. The same components as those of Embodiment 1 are denoted by the same reference signs, and description of the components is omitted.
[0033]
An insulator 180 of Embodiment 2 includes a winding portion 181 around which the conductive wire that forms the coil 72 is wound, an inner wall portion 182 formed on an inner diameter side of the winding portion 181 to be inclined to an outer diameter side at a preset inner inclination angle 0i with respect to the axial direction before the winding, and the outer wall portion 83 formed on an outer diameter side of the winding portion 181 to be inclined at the outer inclination angle θ0 with respect to the plane S perpendicular to the radial direction. An inner surface of the inner wall portion 182 includes an inner wall inner lower edge portion 182a positioned on a side close to the core 71 and an inner wall inner distal end portion 182b positioned at a distal end.
[0034]
The inner inclination angle 0i of the inner wall portion 182 only needs to have a contact prevention angle 0d at which contact with the rotator 61 can be prevented as a lower limit value and the reference inclination angle Omax calculated by Expression 1 as an upper limit value (0d < 0i < Omax). When the inner inclination angle 0i is set with the reference inclination angle Omax as the lower limit value (0i > Omax), the inner wall portion 182 is in a state of projecting onto the turning trajectory of the conductive wire wound in the vicinity of the inner wall portion 182. Thus, the collision between the conductive wire and the insulator 180 cannot be prevented.
[0035]
Further, the contact prevention angle 0d at which the contact with the rotator 61 can be prevented only needs to be set such that an inner wall inner-diameter inclination amount Di being a radial distance between the inner wall inner lower edge portion 182a and the inner wall inner distal end portion 182b of the inner wall portion 182 before the winding becomes equal to or larger than a distance Dmin between the rotator 61 and the inner wall inner lower edge portion 182a (minimum distance to the rotator 61) (Dmin < Di). By setting as described above, the radial distance between the rotator 61 and the inner wall inner distal end portion 182b after the winding becomes equal to or larger than 0. Thus, the inner wall portion 182 can be prevented from projecting to the inner diameter side, thereby being capable of preventing the contact between the rotator 61 and the inner wall portion 182.
[0036]
As described above, in the insulator 180 of Embodiment 2, the inner wall portion 182 is inclined in advance in an outer diameter direction at the inner inclination angle 0i and the outer wall portion 83 is inclined in the outer diameter direction at the outer inclination angle θ0 before the winding. Consequently, the contact between the inner wall portion 182 and the outer wall portion 83, and the conductive wire wound in the vicinity of the inner wall portion 182 and the outer wall portion 83 can be prevented. Specifically, as illustrated in Fig. 7, an angle formed between the plane T perpendicular to the axial direction and the outer-diameter side side surface of the inner wall portion 182 and an angle formed between the plane T and the inner-diameter side side surface of the outer wall portion 83 each become equal to or smaller than 90 degrees. Further, the insulator 180 is formed such that the inner wall inner-diameter inclination amount Di becomes equal to or larger than the distance Dmin between the rotator 61 and the inner wall inner lower edge portion 182a. Thus, the contact between the rotator 61 and the inner wall portion 182 can be prevented.
[0037]
Consequently, with the rotary electric motor and the compressor according to Embodiment 2, the regular winding with higher accuracy can be achieved. Thus, the improvement of the motor efficiency can be achieved. Further, the conductive wire, and the inner wall portion 182 and the outer wall portion 83 do not come into contact with each other, and hence the improvement of the productivity can be achieved by increasing a winding speed. Still further, the manufacturing degradation of the insulating coating of the conductive wire can be reduced. Consequently, in combination with the effect of preventing the contact between the rotator 61 and the inner wall portion 182, the improvement of the reliability can be achieved.
[0038]
In the example illustrated in Fig. 6 and Fig. 7, the whole inner wall portion 182 forms the inner inclination angle 0i. However, an inclination of the outer-diameter side side surface of the inner wall portion 182 and an inclination of the inner-diameter side side surface of the inner wall portion 182 may be set individually. Specifically, an inclination angle of the inner-diameter side side surface of the inner wall portion 182 only needs to be set such that the inner wall inner distal end portion 182b does not come into contact with the rotator 61 after the winding. Further, an inclination angle of the outer-diameter side side surface of the inner wall portion 182 only needs to be set within a range of θί < Θ and set such that the contact with the conductive wire during the winding can be prevented.
[0039]
Further, only a portion of the outer-diameter side side surface of the inner wall portion 182 that collides against the conductive wire that forms the coil 72 may form the inner inclination angle Oi. Specifically, for example, a different inclination angle may be formed between a distal end portion of the inner wall portion 182 and a contact portion with the coil 72. Further, the inner-diameter side side surface and the outer-diameter side side surface of the inner wall portion 182 may be curved surfaces. Even in this manner, the collision between the conductive wire and the insulator 80 can be prevented, and the contact between the rotator 61 and the inner wall portion 182 can be prevented. However, in a case of adopting the abovementioned configuration, a thickness of the inner wall portion 182 is required to be set in consideration of strength allowing resistance to a tensile force generated during the winding, mold releasability and burn at the time of molding, and other factors.
[0040] [Embodiment 3]
Subsequently, a rotary electric motor according to Embodiment 3 of the present invention is described with reference to Fig. 8 and Fig. 9. Fig. 8 and Fig. 9 are longitudinal sectional views for schematically illustrating a structure of a stator included in a compressor according to Embodiment 3 in a state before the winding and in a state after the winding, respectively. The same components as those of Embodiments 1 and 2 are denoted by the same reference signs, and description of the components is omitted.
[0041]
An insulator 280 of Embodiment 3 includes a winding portion 281 around which the conductive wire is wound, the inner wall portion 182 formed on an inner diameter side of the winding portion 281 to be inclined to the outer diameter side at the inner inclination angle 0i with respect to the axial direction before the winding, and the outer wall portion 83 formed on an outer diameter side of the winding portion 281 to be inclined at the outer inclination angle θ0 with respect to the plane S perpendicular to the radial direction. The setting of the inner inclination angle θί of the inner wall portion 182 and the outer inclination angle 0O of the outer wall portion 83 is similar to that in Embodiments 1 and 2 described above.
[0042]
In Embodiment 3, the winding portion 281 is formed to have a thickness increased toward the inner diameter side. Specifically, a winding surface 281a of the winding portion 281 in the axial direction forms a preset winding surface inclination angle 0t with respect to the plane T perpendicular to the axial direction. In Embodiment 3, the winding surface inclination angle 0t is set to be equal to the reference inclination angle Omax (0t = Omax) not to generate a radial component force of the tensile force generated during the winding.
[0043]
As described above, in the insulator 280 of Embodiment 3, the inner wall portion 182 is inclined at the inner inclination angle Oi in the outer diameter direction before the winding, and the outer wall portion 83 is inclined at the outer inclination angle θ0 in the outer diameter direction. Consequently, the contact between the inner wall portion 182 and the outer wall portion 83, and the conductive wire wound in the vicinity of the inner wall portion 182 and the outer wall portion 83 can be prevented. Further, the insulator 280 is formed such that the inner wall innerdiameter inclination amount Di becomes equal to or larger than the distance Dmin between the rotator 61 and the inner wall inner lower edge portion 182a. Consequently, the contact between the rotator 61 and the inner wall portion 182 can also be prevented.
[0044]
In Embodiment 3, the winding surface 281a of the winding portion 281 in the axial direction forms the winding surface inclination angle 0t with respect to the plane T that is at a right angle with respect to the axial direction. Consequently, as illustrated in Fig. 9, the winding surface 281a can be provided to be parallel to the plane T perpendicular to the axial direction after the winding. Specifically, the winding portion 281 follows contraction of the core 71 occurring during the winding to be inclined. As a result, after the winding, the winding surface inclination angle 6t is cancelled out, so that the winding surface 281a is brought into a state of being parallel to the plane T. The amount of tight winding occurring during the winding is stabilized after completion of winding of a first layer of the coil 72 and remains substantially unchanged during the winding of second and subsequent layers. Specifically, at the completion of the winding of the first layer, the winding surface 281a is placed in a state of being approximately parallel to the plane T.
Consequently, in the rotary electric motor of Embodiment 3, the second and subsequent layers can be formed by winding under the state in which the winding surface 281 a is approximately parallel to the plane T. Thus, the generation of the component force of the tensile force in the radial direction during the winding can be prevented. Thus, a situation in which the winding slips to cause collapse of winding can be prevented.
[0045]
As described above, in the rotary electric motor and the compressor of Embodiment 3, the regular winding with higher accuracy can be achieved. Consequently, the improvement of the motor efficiency can be achieved. Further, the conductive wire, and the inner wall portion 182 and the outer wall portion 83 do not come into contact with each other. Consequently, the improvement of the productivity can be achieved by increasing the winding speed. Further, the manufacturing degradation of the insulating coating of the conductive wire can be reduced, and the contact with the rotator 61 can also be prevented. Thus, the improvement of the reliability can be achieved. It is noted that the laminate thickness of the core 71 formed by the laminated steel plate is not necessarily reduced by the amount of all the inter-lamination gaps σ after the winding. Further, an outer diameter side of the core 71 may be contracted. Thus, the winding surface inclination angle 0t may be set to be smaller than the reference inclination angle Omax by a preset given angle.
[0046] [Embodiment 4]
Subsequently, a rotary electric motor according to Embodiment 4 of the present invention is described with reference to Fig. 10 and Fig. 11. Fig. 10 and Fig. 11 are longitudinal sectional views for schematically illustrating a structure of a stator included in a compressor according to Embodiment 4 in a state before the winding and in a state after the winding, respectively. The rotary electric motor of Embodiment 4 has a feature that a necessary requirement for the regular winding that a collision width between the insulator and the conductive wire during the winding is equal to or smaller than half of a wire diameter of the conductive wire is satisfied.
The same components as those of Embodiments 1 to 3 are denoted by the same reference signs, and description of the components is omitted.
[0047]
An insulator 380 of Embodiment 4 includes a winding portion 381 around which the conductive wire is wound, the inner wall portion 82 provided on the inner diameter side of the winding portion 381, and an outer wall portion 383 provided on an outer diameter side of the winding portion 381 and inclined at the preset outer inclination angle θ0 with respect to the plane S perpendicular to the radial direction. An inner surface of the outer wall portion 83 includes an outer wall inner lower edge portion 383a positioned on a side close to the core 71 and an outer wall inner distal end portion 383b positioned at a distal end. The core 71 after the winding has a laminate thickness decreased toward the inner diameter side under effects of the tensile force generated in the tight winding caused during the winding and forms the inclination angle Θ with respect to the plane T perpendicular to the axial direction.
[0048]
The outer inclination angle 0o is set to become smaller than the reference inclination angle Θμαχ (θο < Omax) calculated on the basis of the laminate thickness and the number of laminated layers of the core 71 and the outer diameter and the inner diameter of the stator, while an outer wall inner diameter inclination amount Do being a radial distance between the outer wall inner lower edge portion 383a and the outer wall inner distal end portion 383b of the outer wall portion 383 after the winding is set to become equal to or smaller than a radius of the conductive wire.
[0049]
Here, when a height of an inner-diameter-side side surface (contact surface with the coil 72) of the outer wall portion 383 is Lo, the outer wall inner diameter inclination amount Do can be expressed as Lo χ sin (Θ - 0o). Specifically, in Embodiment 4, when a radius of the conductive wire is 4>m/2, the outer wall inner diameter inclination amount Do can be set to be equal to or smaller than the radius of the conductive wire by setting the outer inclination angle θ0 such that a relationship Lo χ sin (Θ - θο) < φΓη/2 is satisfied. Consequently, the collision width between the insulator and the winding during the winding can be reduced to be equal to or smaller than half of the wire diameter of the conductive wire. Thus, the improvement of ease of winding can be achieved, while reliability of the insulating coating of the conductive wire can be ensured.
[0050] [Embodiment 5]
Subsequently, a rotary electric motor according to Embodiment 5 of the present invention is described with reference to Fig. 12 and Fig. 13. Fig. 12 and Fig. 13 are longitudinal sectional views for schematically illustrating a structure of a stator included in a compressor according to Embodiment 5 in a state before the winding and in a state after the winding, respectively. The same components as those of Embodiments 1 to 4 are denoted by the same reference signs, and description of the components is omitted.
[0051]
An insulator 480 of Embodiment 5 includes a winding portion 481 around which the conductive wire is wound, an inner wall portion 482 formed on an inner diameter side of the winding portion 381 to be inclined to an outer diameter side at a preset inner inclination angle 0i with respect to the axial direction before the winding, and the outer wall portion 83 formed on an outer diameter side of the winding portion 481.
An outer surface of the inner wall portion 482 includes an inner wall outer lower edge portion 482a positioned on a side close to the core 71 and an inner wall outer distal end portion 482b positioned at a distal end. The core 71 after the winding has a thickness decreased toward the inner diameter side under the effects of the tensile force generated in the tight winding occurring during the winding and forms the inclination angle Θ with respect to the plane T perpendicular to the axial direction of the main shaft 21.
[0052]
The inner inclination angle 0i is set to become larger than the reference inclination angle Θμαχ (θί > Θμαχ) calculated on the basis of the laminate thickness and the number of laminated layers of the core 71 and the outer diameter and the inner diameter of the stator, while an inner wall outer-diameter inclination amount Dio being a radial distance between the inner wall outer lower edge portion 482a and the inner wall outer distal end portion 482b of the inner wall portion 482 after the winding is set to become equal to or smaller than the radius of the conductive wire.
[0053]
When a height of an outer diameter-side side surface (contact surface with the coil 72) of the inner wall portion 482 is Li, the inner wall outer-diameter inclination amount Dio can be expressed as Li χ sin (θί - θ). Specifically, in Embodiment 5, the inner wall outer-diameter inclination amount Dio can be set to be equal to or smaller than the radius of the conductive wire by setting the inner inclination angle θί such that a relationship Li χ sin (θί - θ) < φΓη/2 is satisfied. Consequently, the collision width between the insulator and the winding during the winding can be reduced to be equal to or smaller than half of the wire diameter of the conductive wire. Thus, the improvement of ease of winding can be achieved, while the reliability of the insulating coating of the conductive wire can be ensured.
[0054] (Effects of Embodiments 1 to 5)
With reference to Fig. 14 to Fig. 17, effects obtained by the rotary electric motors and the compressors according to Embodiments 1 to 5 described above are described below further in detail. Fig. 14 and Fig. 15 are longitudinal sectional views for schematically illustrating a structure of a stator included in a related-art compressor in a state before winding and in a state after the winding, respectively.
Fig. 16 is a longitudinal sectional view for illustrating a problem relating to an inner wall portion and an outer wall portion of a rotator of Fig. 15. Fig. 17 is a longitudinal sectional view for illustrating a problem relating to a winding portion of the rotator of Fig. 15.
[0055]
First, the tight winding is described. The core 71 formed by the laminated steel plate is obtained by laminating the plurality of electromagnetic steel plates. Consequently, the slight inter-lamination gap σ is each generated between the adjacent electromagnetic steel plates. During the winding, the tensile force applied to the conductive wire acts as an external force for compressing the core 71 in the axial direction, and hence the inter-lamination gap σ is reduced. Thus, the contraction occurs in the core 71 with a total gap amount in the core 71 as an upper limit. The contraction is the tight winding. Further, the coil 72 is formed only around the tooth portions 71 b of the core 71. Consequently, the amount of tight winding is increased from the back yoke portion 71a to distal ends of the tooth portions 71b, and hence the core 71 has a shape inclined in an inner diameter direction. As described above, the tight winding has a feature that the amount of tight winding becomes stable at the completion of the winding for the first layer and remains substantially unchanged for the second and subsequent layers.
[0056]
As a method for reducing the tight winding of the core 71, there is known a method of providing a plurality of circular or V-shaped caulking portions to each of the electromagnetic steel plates that construct the core 71 and performing calking under a pressure applied by a press machine and other apparatus during lamination to fix the electromagnetic steel plates in both of the radial direction and the axial direction. Even with the method described above, however, it is still difficult to completely eliminate the tight winding due to springback after release of the pressure. Further, there is also known a method of increasing a press-fit allowance or the number of caulking portions to improve a caulking force to reduce the springback, thereby reducing the inter-lamination gaps. When the press-fit allowance or the number of caulking portions is increased, however, there arises a problem in that an eddy current in the axial direction that is generated inside the laminated steel plate during drive of the rotary electric motor is increased to lower motor efficiency. To solve the problem, the rotary electric motors as described above in Embodiments 1 to 5, which reduce the effects of the tight winding, have been desired.
[0057]
It is preferred that an outer wall portion 983 of an insulator 980 become parallel to a turning trajectory R during the winding. Consequently, as illustrated in Fig. 14, the insulator 980 is conventionally formed such that the outer wall portion 983 becomes parallel to the turning trajectory R in a state before the winding. In a winding step, however, the tight winding occurs as described above, and hence the amount of contraction of the core 71 becomes larger on the inner diameter side than on the outer diameter side. Consequently, postures of the insulators 980 that are installed to one end and the other end of the core 71 as a winding frame follow the tight winding to be inclined in the radial direction. Specifically, as illustrated in Fig.
15, a winding portion 981, an inner wall portion 982, and the outer wall portion 983 are also inclined by the amount corresponding to the inclination angle Θ of the axial end surface of the core 71 with respect to the plane T perpendicular to the axial direction.
[0058]
Consequently, in a related-art configuration, when a conductive wire 72a that forms the coil 72 passes in the vicinity of the outer wall portion 983 (see Fig. 16) during the winding, the conductive wire 72a collides against the insulator 980 at a high speed. Consequently, movement of the winding cannot be controlled to fail to achieve the regular winding. Further, an insulating coating of the conductive wire 72a is damaged due to the collision between the conductive wire 72a and the outer wall portion 983. Thus, there is a problem in both of productivity and reliability. Further, in the related-art configuration, the inner wall portion 982 projects into an area having a diameter equal to or larger than the inner diameter of the stator 70 to come into contact with the rotator 61. Further, as illustrated in Fig. 17, the winding portion 981 follows the tight winding of the core to be inclined. Consequently, a tensile force TS in the axial direction generated during the winding and a component force TSd in a direction in which the winding slips down are generated.
Consequently, the wound conductive wire 72a slips in a direction of the component force TSd to cause the collapse of winding.
[0059]
In this regard, in the rotary electric motors and the compressors of the embodiments described above, each of the plurality of insulators 80, 180, 280, 380, and 480 has the outer wall portion inclined to the outer diameter side at the preset outer inclination angle θ0 with respect to the axial direction before the winding. Thus, even when each of the insulators 80, 180, 280, 380, and 480 follows a change in laminate thickness of the core 71 caused by the tight winding to be inclined to the inner diameter side, each of the outer wall portions 83 and 383 is inclined to the outer diameter side by the amount corresponding to the outer inclination angle θ0. Consequently, the inclination of the outer wall portion to the inner diameter side due to the tight winding can be reduced, so that the damage to the conductive wire 72a that forms the coil 72 and other problems can be prevented.
[0060]
Each of the embodiments described above is a suitable specific example of the rotary electric motor and the compressor, and a technical scope of the present invention is not limited to those embodiments. For example, the outer inclination angle θ0 and the inner inclination angle 0i are set on the basis of the reference inclination angle Omax as a reference in each of the embodiments described above, but the setting of the outer inclination angle 0o and the inner inclination angle 0i is not limited to this configuration. The outer inclination angle θ0 and the inner inclination angle 0i may be set on the basis of a value obtained by adding or subtracting a predetermined threshold value (threshold value determined on the basis of the amount of reduction of the inter-lamination gap σ and other factors) to or from the reference inclination angle Θμαχ as a reference.
Reference Signs List [0061] compressor 20 hermetic container 21 main shaft 21a oil feed passage 22 oil pump 22a lubricating oil 23 lead wire 24 sealed terminal 30 suction pipe 40 discharge pipe 50 compression mechanism unit 51 fixed scroll 51a fixed spiral body 52 orbiting scroll
52a orbiting spiral body 60 rotary electric motor 61 rotator 61a boss 61c permanent magnet 61 d endplate
61b magnet insertion hole 61e balance weight 61f rivet 70 stator 71 core yoke portion 71b tooth portion 72 coil 72a conductive wire
80, 180, 280, 380, 480, 980 insulator a back coil
81, 181, 281,381,481, 981 winding portion 82,182,482,982 inner wall portion 83,383,983 outer wall portion 182a inner wall inner lower edge portion 182b inner wall inner distal end portion 281a winding surface 383a outer wall inner lower edge portion 383b outer wall inner distal end portion 482a inner wall outer lower edge portion 482b inner wall outer distal end portion Di inner wall innerdiameter inclination amount Dio inner wall outer-diameter inclination amount
Dmin distance Do outer wall inner diameter inclination amount R turning trajectory S plane T plane TS tensile force TSd component force δ inter-lamination gap Θ inclination angle Θμαχ reference inclination angle 6d contact prevention angle θί inner inclination angle θ0 outer inclination angle 6t winding surface inclination angle
Claims (14)
- CLAIMS [Claim 1]A rotary electric motor, comprising: a main shaft;a rotator into which the main shaft is inserted; and a stator annularly provided on an outer periphery side of the rotator, the stator including a core formed by laminating a plurality of electromagnetic steel plates, insulators each provided to one axial end and an other axial end of the core, and a coil formed by winding a conductive wire, through the core, between the insulator provided at the one axial end of the core and the insulator provided at the other axial end of the core, each of the insulators including a winding portion in which the conductive wire is wound in a radial direction of the stator, and an outer wall portion provided on an outer diameter side of the winding portion and including an inner surface inclined to the outer diameter side at a set outer inclination angle with respect to an axial direction of the main shaft in a state before the winding.
- [Claim 2]The rotary electric motor of claim 1, wherein the core after the winding has a laminate thickness decreased toward an inner diameter side of the core as compared to a laminate thickness before the winding, and forms an inclination angle with respect to a plane perpendicular to the axial direction, and wherein the set outer inclination angle is equal to or larger than the inclination angle.
- [Claim 3]The rotary electric motor of claim 2, wherein the inclination angle is a reference inclination angle calculated on a basis of the laminate thickness and a number of laminated layers of the core, and an outer diameter and an inner diameter of the stator.
- [Claim 4]The rotary electric motor of claim 1, wherein the set outer inclination angle is smaller than a reference inclination angle calculated on a basis of a laminate thickness and a number of laminated layers of the core, and an outer diameter and an inner diameter of the stator, wherein the inner surface of the outer wall portion includes an outer wall inner lower edge portion positioned on a side close to the core and an outer wall inner distal end portion positioned at a distal end of the outer wall portion, and wherein an outer wall inclination amount being a radial distance between the outer wall inner lower edge portion and the outer wall inner distal end portion after the winding is equal to or smaller than a radius of the conductive wire.
- [Claim 5]The rotary electric motor of any one of claims 1 to 4, wherein the whole outer wall portion has the set outer inclination angle.
- [Claim 6]The rotary electric motor of any one of claims 1 to 5, wherein each of the insulators includes an inner wall portion provided on an inner diameter side of the winding portion, the inner wall portion having an outer surface inclined to the outer diameter side at a set inner inclination angle with respect to the axial direction in the state before the winding.
- [Claim 7]The rotary electric motor of claim 6, wherein the set inner inclination angle is smaller than a reference inclination angle calculated on a basis of a laminate thickness and a number of laminated layers of the core, and an outer diameter and an inner diameter of the stator.
- [Claim 8]The rotary electric motor of claim 7, wherein the inner wall portion has an inner surface including an inner wall inner lower edge portion positioned on a side close to the core and an inner wall inner distal end portion positioned at a distal end of the inner wall portion, and wherein an inner wall inner-diameter inclination amount being a radial distance between the inner wall inner lower edge portion and the inner wall inner distal end portion before the winding is equal to or larger than a distance between the rotator and the inner wall inner lower edge portion.
- [Claim 9]The rotary electric motor of claim 6, wherein the set inner inclination angle is larger than a reference inclination angle calculated on a basis of a laminate thickness and a number of laminated layers of the core, and an outer diameter and an inner diameter of the stator, wherein the outer surface of the inner wall portion includes an inner wall outer lower edge portion positioned on a side close to the core and an inner wall outer distal end portion positioned at a distal end of the inner wall portion, and wherein an inner wall outer-diameter inclination amount being a radial distance between the inner wall outer lower edge portion and the inner wall outer distal end portion after the winding is equal to or smaller than a radius of the conductive wire.
- [Claim 10]The rotary electric motor of any one of claims 6 to 9, wherein the whole inner wall portion has the set inner inclination angle.
- [Claim 11]The rotary electric motor of any one of claims 1 to 10, wherein a winding surface of the winding portion in the axial direction forms a preset winding surface inclination angle with respect to a plane perpendicular to the axial direction.
- [Claim 12]The rotary electric motor of claim 11, wherein the winding surface inclination angle is equal to a reference inclination angle calculated on a basis of a laminate thickness and a number of laminated layers of the core, and an outer diameter and an inner diameter of the stator.
- [Claim 13]A compressor, comprising: a hermetic container constructing an outer shell;a compression mechanism unit arranged inside the hermetic container and configured to compress a fluid; and the rotary electric motor of any one of claims 1 to 12, the rotary electric motor being arranged inside the hermetic container and configured to rotationally drive the main shaft to drive the compression mechanism unit.
- [Claim 14]The compressor of claim 13, wherein single component refrigerant of HFO1123 or refrigerant mixture containing HFO-1123 is used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/062981 WO2016174768A1 (en) | 2015-04-30 | 2015-04-30 | Rotary motor and compressor |
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| Publication Number | Publication Date |
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| GB201716742D0 GB201716742D0 (en) | 2017-11-29 |
| GB2553463A true GB2553463A (en) | 2018-03-07 |
| GB2553463B GB2553463B (en) | 2021-07-28 |
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| JP (1) | JP6362771B2 (en) |
| CN (1) | CN107534342B (en) |
| GB (1) | GB2553463B (en) |
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| US11277048B2 (en) * | 2017-09-20 | 2022-03-15 | Panasonic Intellectual Property Management Co., Ltd. | Insulator, and stator and motor comprising same |
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| EP0871282A1 (en) * | 1997-04-11 | 1998-10-14 | Kabushiki Kaisha Toshiba | Stator for dynamoelectric machine and method of making the same |
| JP2003319593A (en) * | 2002-04-25 | 2003-11-07 | Aichi Elec Co | Stator of motor |
| JP2003333788A (en) * | 2002-05-13 | 2003-11-21 | Mitsubishi Heavy Ind Ltd | Stator of motor |
| WO2013166372A1 (en) * | 2012-05-04 | 2013-11-07 | Comprehensive Power, Inc. | Device and method for cooling electric device having modular stators |
| WO2015005290A1 (en) * | 2013-07-12 | 2015-01-15 | 旭硝子株式会社 | Working medium for heat cycle, composition for heat cycle system, and heat cycle system |
| JP2015076953A (en) * | 2013-10-08 | 2015-04-20 | 日立アプライアンス株式会社 | Hermetic type motor compressor and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1143424C (en) * | 1997-03-06 | 2004-03-24 | 株式会社电装 | Method for production of rotor inserted with coil-bar and slot type insulator assembly and apparatus therefor |
| JPH11164526A (en) * | 1997-11-27 | 1999-06-18 | Toshiba Corp | Stator manufacture and the like of rotating electric machine |
| JP2002247790A (en) * | 2001-02-21 | 2002-08-30 | Moric Co Ltd | Structure and manufacturing method of stator coil of rotating filed type electric apparatus |
| JP4655764B2 (en) * | 2005-06-06 | 2011-03-23 | トヨタ自動車株式会社 | Rotating electric machine |
| JP2008278628A (en) * | 2007-04-27 | 2008-11-13 | Sumitomo Electric Ind Ltd | Split stator and method of manufacturing the same |
| KR100934017B1 (en) * | 2007-12-11 | 2009-12-28 | 엘지전자 주식회사 | motor |
| JP5470903B2 (en) * | 2009-02-25 | 2014-04-16 | 日産自動車株式会社 | Rotating electric machine stator |
| JP5874418B2 (en) * | 2012-02-03 | 2016-03-02 | ダイキン工業株式会社 | Motor and compressor |
-
2015
- 2015-04-30 GB GB1716742.0A patent/GB2553463B/en active Active
- 2015-04-30 WO PCT/JP2015/062981 patent/WO2016174768A1/en active Application Filing
- 2015-04-30 JP JP2017515349A patent/JP6362771B2/en active Active
- 2015-04-30 CN CN201580078919.5A patent/CN107534342B/en active Active
Patent Citations (6)
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| EP0871282A1 (en) * | 1997-04-11 | 1998-10-14 | Kabushiki Kaisha Toshiba | Stator for dynamoelectric machine and method of making the same |
| JP2003319593A (en) * | 2002-04-25 | 2003-11-07 | Aichi Elec Co | Stator of motor |
| JP2003333788A (en) * | 2002-05-13 | 2003-11-21 | Mitsubishi Heavy Ind Ltd | Stator of motor |
| WO2013166372A1 (en) * | 2012-05-04 | 2013-11-07 | Comprehensive Power, Inc. | Device and method for cooling electric device having modular stators |
| WO2015005290A1 (en) * | 2013-07-12 | 2015-01-15 | 旭硝子株式会社 | Working medium for heat cycle, composition for heat cycle system, and heat cycle system |
| JP2015076953A (en) * | 2013-10-08 | 2015-04-20 | 日立アプライアンス株式会社 | Hermetic type motor compressor and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2553463B (en) | 2021-07-28 |
| WO2016174768A1 (en) | 2016-11-03 |
| CN107534342B (en) | 2019-07-12 |
| CN107534342A (en) | 2018-01-02 |
| JP6362771B2 (en) | 2018-07-25 |
| JPWO2016174768A1 (en) | 2017-11-30 |
| GB201716742D0 (en) | 2017-11-29 |
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