Electric motors, compressors, and refrigeration cycle systems

Abstract

The connecting wires between coils are arranged efficiently. [Solution] The electric motor comprises a rotor configured to be rotatable, a stator positioned with a gap between it and the rotor and having a plurality of coils, an end plate provided on the axial end of the stator, and a plurality of connecting wires routed along the surface of the end plate to electrically connect the plurality of coils. The end plate has a raised portion extending in the axial direction of the stator from its edge, and a plurality of holding portions provided on the raised portion to hold the plurality of connecting wires apart from each other.

Description

Technical Field

[0001] Embodiments of the present invention relate to an electric motor, a compressor, and a refrigeration cycle apparatus.

Background Art

[0002] Conventionally, for example, in the manufacture of an electric motor using a winding machine, in order to route the starting or ending windings from each phase, the windings drawn from the coil are covered with an insulating tube, or a covered wire is connected to the end of the coil to provide insulation. Then, the thus-insulated windings are routed above the coil portion and bundled and fixed with a thread, a binding band, or the like.

Prior Art Documents

Patent Documents

[0007] The compressor of this embodiment comprises the above-mentioned electric motor and a sealed container housing the electric motor.

[0008] The refrigeration cycle device of the embodiment comprises the above-mentioned compressor, a condenser into which the refrigerant discharged from the compressor flows, and an evaporator into which the refrigerant discharged from the condenser flows. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 schematically shows an example of a compressor according to an embodiment, and is a partial view of the internal structure. [Figure 2] Figure 2 is a schematic diagram showing an example of a refrigeration cycle device according to an embodiment. [Figure 3] Figure 3 is a perspective view showing an example of an electric motor according to an embodiment, with the stator, end plates, terminals, and connecting wires assembled. [Figure 4] Figure 4 is a perspective view showing an example of an electric motor according to an embodiment, with the stator, end plates, terminals, and connecting wires disassembled. [Figure 5] Figure 5 is a perspective view showing an example of an electric motor according to an embodiment, with the stator and end plates disassembled. [Figure 6] Figure 6 is a perspective view showing one of the multiple coil units constituting the stator of an example of an electric motor according to an embodiment, with the unit disassembled. [Figure 7] Figure 7 is a plan view showing an example of an electric motor according to an embodiment, with the stator, end plates, terminals, and connecting wires assembled, along the axial direction of the stator. [Figure 8] Figure 8 is a plan view of Figure 7, excluding the end plates. [Figure 9] Figure 9 is a magnified view of the area indicated by arrow X9 in Figure 3. [Figure 10] Figure 10 is a magnified view of the section indicated by the arrow X10-X10 in Figure 7. [Figure 11] Figure 11 is a cross-sectional view shown along the line X11-X11 in Figure 10. [Figure 12] Figure 12 is a cross-sectional view shown along the line X12-X12 in Figure 10. [Figure 13] Figure 13 is a cross-sectional view shown along the line X13-X13 in Figure 10. [Figure 14] Figure 14 shows a modified example of the end plate and corresponds to Figure 5. [Figure 15] Figure 15 shows a modified example of the end plate, and is equivalent to Figure 10, excluding the connecting wires and terminals. [Modes for carrying out the invention]

[0010] The following describes the electric motor, compressor, and refrigeration cycle device according to the embodiment with reference to the drawings. The compressor 1 shown in Figure 1 can be used, for example, as a component of a refrigeration cycle. The compressor 1, together with an evaporator 91, a condenser 92, and an expansion valve 93, etc., constitutes the refrigeration cycle device 90, as shown in Figure 2, for example. The compressor 1 draws in the refrigerant flowing out from the evaporator 91, compresses the refrigerant within the compressor 1, and supplies the refrigerant to the condenser 92. The compressor 1 can be configured as a rotary compressor of the single-cylinder type with one compression chamber in the compressor body 10, a two-cylinder type with two compression chambers, or a three-cylinder type with three compression chambers.

[0011] As shown in Figure 1, the compressor 1 comprises a discharge pipe 2, an inlet pipe 3, a suction pipe 4, an accumulator 5, and a compressor body 10. The compressor 1 shown in Figure 1 is an example of a two-cylinder rotary compressor. The compressor 1 is installed and used in the position shown in Figure 1, and the vertical direction of the paper in Figure 1 is the vertical direction of the compressor 1.

[0012] The compressor body 10 includes a hermetic container 11, a rotating shaft 12, an oil separator 13, and an electric motor 20. The hermetic container 11 is made of, for example, metal and is formed in a cylindrical shape as a whole. Inside the hermetic container 11, a rotating shaft 12, an electric motor 20, and a compression mechanism (not shown) are incorporated, and the refrigerant is filled.

[0013] The rotating shaft 12 connects the electric motor 20 and the compression mechanism (not shown) and has a function of transmitting the rotational motion of the electric motor 20 to the compression mechanism. When the compression mechanism is driven by the electric motor 20, it compresses the refrigerant in the hermetic container 11 and discharges it to the outside of the hermetic container 11. In this case, the discharge pipe 2 is connected to, for example, the upper part of the hermetic container 11 and extends upward from the hermetic container 11. The oil separator 13 is provided on the upper end face of the rotating shaft 12 and rotates together with the rotating shaft 12. The oil separator 13 has a function of separating lubricating oil from the compressed refrigerant by the centrifugal force of rotation.

[0014] The accumulator 5 and the compressor body 10 are connected by a suction pipe 4. The suction pipe 4 extends from the bottom of the accumulator 5 and is connected to a lower portion of the outer surface of the hermetic container 11. When the compressor body 10 operates, the refrigerant in the compressor body 10 is compressed. Then, the compressed refrigerant is discharged from the discharge pipe 2 to the outside of the compressor body 10 and supplied to external equipment (not shown).

[0015] Also, due to the discharge of this refrigerant, the suction pipe 4 side of the compressor body 10 becomes negative pressure. As a result, the refrigerant in the accumulator 5 is sucked into the compressor body 10 through the suction pipe 4, and the refrigerant flowing out from external equipment (not shown) is sucked into the inside of the accumulator 5 through the inflow pipe 3. Then, the refrigerant flowing into the accumulator 5 is adjusted to a certain pressure and supplied to the compressor body 10.

[0016] The electric motor 20 can be, for example, a brushless DC motor. The electric motor 20 comprises a rotor 30, a stator 40, connecting wires 50, and end plates 60. The rotor 30 is composed of, for example, a rotor core 31 and permanent magnets (not shown). The rotor 30 is rotatably positioned inside the stator 40 with a small gap. The rotor 30 is connected to the rotating shaft 12. The central axes of the rotor 30 and the rotating shaft 12 coincide with the central axis of the stator 40.

[0017] The stator 40 is fixed inside the sealed container 11. As shown in Figure 3, the stator 40 is formed in a cylindrical shape overall. As shown in Figure 6, the stator 40 is constructed by combining, for example, a plurality of coil units 401 in a cylindrical shape. Each coil unit 401 has a coil 41, a bobbin 42, a stator core 43, and terminals 44.

[0018] The coil 41 is formed by winding wire around a bobbin 42. The bobbin 42 is made of, for example, an electrically insulating resin. The bobbin 42 has two terminal connection portions 421 and an iron core insertion portion 422. The terminal connection portions 421 correspond to the beginning and end of the winding of the coil 41. The terminal connection portions 421 are configured to hold the terminal 44 by fitting it into them. In this embodiment, the terminal connection portions 421 are provided on one of the axial ends of the stator 40, and not on the other end.

[0019] The core insertion section 422 is a hole formed by, for example, a bobbin 42 passing through the stator 40 in a rectangular shape perpendicular to the axial direction. The coil 41 is formed by winding around the core insertion section 422. The stator core 43 is made of, for example, laminated electrical steel sheets, and is inserted into the core insertion section 422 and positioned inside the coil 41.

[0020] The terminal 44 is made of, for example, a conductive metal material. When the terminal 44 is fitted into the terminal connection part 421, it contacts the beginning or end of the coil 41 and is electrically connected to the coil 41. Some of the terminals 44 are connected to the sealed terminal part 14 via lead wires 21, as shown in Figure 1. The lead wires 21 are wires that supply power to the coil 41 via the sealed terminal part 14. Multiple lead wires 21 are provided depending on the type of electric motor 20.

[0021] The electric motor 20 of this embodiment has a multi-pole rotor 30 and stator 40. That is, the rotor 30 has two or more magnetic poles. The stator 40 has three or more coils 41 depending on the number of magnetic poles of the rotor 30. The electric motor 20 of this embodiment is composed of 8 poles and 12 coils. That is, the rotor 30 has 8 magnetic poles, and the stator 40 has 12 coils 41. In other words, the electric motor 20 of this embodiment is an 8-pole, 12-slot electric motor. Note that the electric motor 20 may also be configured to have more than 8 poles and 12 slots of magnetic poles and coils 41. Furthermore, in the following description, the U-phase coil 41 may be referred to as the U-phase coil 41U, the V-phase coil as the V-phase coil 41V, and the W-phase coil 41 as the W-phase coil 41W.

[0022] The connecting wire 50 is routed along the surface of the end plate 60 and electrically connects multiple coils 41 of different or the same phase. In the following description, among the multiple connecting wires 50, the one that electrically connects U-phase coils 41U together will be called the U-phase connecting wire 50U, the one that electrically connects V-phase coils 41V together will be called the V-phase connecting wire 50V, and the one that electrically connects W-phase coils 41W together will be called the W-phase connecting wire 50W. In addition, among the multiple connecting wires 50, the one that electrically connects the U-phase coil 41U, the V-phase coil 41V, and the W-phase coil 41W will be called the neutral connecting wire 50Y.

[0023] The U-phase connection line 50U electrically connects multiple U-phase coils 41U, in this case, four U-phase coils 41U. The V-phase connection line 50V electrically connects multiple V-phase coils 41V, in this case, four V-phase coils 41V. And the W-phase connection line 50W electrically connects multiple W-phase coils 41W, in this case, four W-phase coils 41W.

[0024] The neutral connection wire 50Y electrically connects the coils 41 of different phases that are adjacent to each other in the circumferential direction of the stator 40. Specifically, the neutral connection wire 50Y electrically connects the U-phase coil 41U, V-phase coil 41V, and W-phase coil 41W that are adjacent to each other in the circumferential direction of the stator 40. The wire diameter of each connection wire 50 is set according to the output power of the motor 20. For example, when the output power of the motor 20 is high, each connection wire 50 is made of a relatively thick and rigid metal wire that can be bent using a tool.

[0025] The end plate 60 is provided, for example, on one end of the stator 40 in the axial direction. The end plate 60 can be made of an integrally molded product of various materials having electrical insulating properties, such as polybutylene terephthalate (PBT), liquid crystal polymer (Liquid Crystal Polymer, Liquid Crystal Plastic, LCP, semi- and fully aromatic polyester), polyphenylene sulfide (PPS), etc. Preferably, the end plate 60 is made of a material that has refrigerant resistance and oil resistance.

[0026] As shown in Figure 5, the end plate 60 is formed in an annular shape overall. The end plate 60 covers at least three coils 41 that are arranged in a continuous fashion. If the motor 20 is a three-phase AC motor, the end plate 60 covers at least three coils that are arranged in a continuous fashion: the U-phase coil 41U, the V-phase coil 41V, and the W-phase coil 41W. In this embodiment, the end plate 60 covers all of the coils 41.

[0027] The end plate 60 is for routing multiple connection wires 50, namely the U-phase connection wire 50U, the V-phase connection wire 50V, the W-phase connection wire 50W, and the neutral connection wire 50Y, along the surface of the end plate 60. In this embodiment, the end plate 60 is provided on the terminal connection portion 421 side of both ends in the axial direction of the stator 40, and not on the opposite side from the terminal connection portion 421. The end plate 60 has a through portion 61, a first restricting portion 62, a locking portion 63, a rising portion 64, a holding portion 65, a support portion 66, a guide portion 67, and a second restricting portion 68. In this embodiment, the first restricting portion 62, the locking portion 63, the rising portion 64, the holding portion 65, the support portion 66, the guide portion 67, and the second restricting portion 68 are, for example, formed by integral molding of resin.

[0028] The through-hole 61 is a through-hole formed by penetrating the end plate 60 in the thickness direction. The through-hole 61 is formed in a rectangular or trapezoidal shape, for example. The shape of the through-hole 61 can be, for example, a trapezoid with the longer side on the radially outer side of the end plate 60 and the shorter side on the radially inner side, a rectangle that is longer in the radial direction of the end plate 60, or a fan shape along the circumferential direction of the end plate 60. The through-hole 61 is provided corresponding to each terminal connection part 421. That is, two through-holes 61 are provided for each coil 41. The terminal connection part 421 is passed through each through-hole 61 and exposed to the outside.

[0029] The first restricting portion 62 has the function of restricting the movement of each connecting wire 50, which is routed along the surface of the end plate 60, in a direction away from the end plate 60, as the portion that passes over the through portion 61. As shown in Figure 10, for example, the first restricting portion 62 is composed of a cantilevered rod-shaped portion that rises in a roughly L-shape from one side of two sides of the stator 40 that extend radially, that is, perpendicular to the axis, among the sides of the through portion 61, and extends to the other side. In this embodiment, the first restricting portion 62 is provided on the rising portion 64 and holding portion 65 side relative to the terminal connection portion 421 and terminal 44. Also in this embodiment, the first restricting portion 62 is positioned closer to the center of the rotor 30, that is, radially inward, than the terminal connection portion 421 and terminal 44.

[0030] The locking portion 63 is provided as needed between adjacent through portions 61 and is formed in a cylindrical shape that protrudes from the surface of the end plate 60. The locking portion 63 has the function of hooking onto the end of the connecting wire 50 to fix the end of the connecting wire 50, or the function of applying to an intermediate portion of the connecting wire 50 to change the direction of the wiring of the connecting wire 50.

[0031] The end plate 60 has multiple rising portions 64. As shown in Figure 5, the rising portions 64 are formed in a shape that extends from the inner circumferential edge of the end plate 60 in the axial direction of the stator 40. That is, the rising portions 64 are provided along the inner circumferential edge of the end plate 60 and are formed in a plate-like shape that rises from the surface of the end plate 60. In this embodiment, the rising portions 64 are arranged perpendicular to the surface of the end plate 60. The end plate 60 has the same number of rising portions 64 as the coil 41, which in this embodiment is 12. Each rising portion 64 is arranged at a predetermined interval along the circumferential direction of the end plate 60.

[0032] As shown in Figure 11, when viewed in the axial direction of the stator 40, the top 641 of the rising portion 64 is located closer to the end plate 60 than the top 441 of the terminal 44. In other words, as shown in Figure 11, the dimension H1 from the surface of the end plate 60 to the top 641 of the rising portion 64 is smaller than the dimension H2 from the surface of the end plate 60 to the top 441 of the terminal 44.

[0033] The end plate 60 has multiple holding portions 65. The holding portions 65 are provided on the rising portion 64, as shown in Figure 9, etc. The holding portions 65 hold the multiple connecting wires 50 while keeping them separated from each other. In this case, the holding portions 65 have the function of holding the multiple connecting wires 50 while keeping them separated in the axial direction of the rotor 30. That is, as shown in Figure 10, the multiple connecting wires 50 held by the holding portions 65 have overlapping portions when the end plate 60 is viewed in the axial direction of the rotor 30, but as shown in Figures 11 to 13, when viewed perpendicular to the axis of the rotor 30, they are separated in the axial direction of the rotor 30. In this embodiment, the holding of the connecting wires 50 by the holding portions 65 only needs to be such that the position can be maintained by the rigidity of the connecting wires 50, and the connecting wires 50 do not need to be fixed.

[0034] The holding portion 65 can be shaped to protrude from the rising portion 64 in a direction perpendicular to the rotation axis of the rotor 30, that is, parallel to the surface of the end plate 60. In this embodiment, the holding portion 65 is configured to protrude from the rising portion 64 toward the radially outward direction of the end plate 60. Alternatively, the holding portion 65 may be configured to protrude from the rising portion 64 toward the radially inward direction of the end plate 60. Furthermore, the holding portion 65 may be shaped, for example, as a groove extending along the circumferential direction of the end plate 60 formed in the rising portion 64.

[0035] As shown in Figure 9, etc., each rising section 64 is provided with multiple, in this case three, holding sections 65, with the axial position of the rotor 30 differing. In the following description, when distinguishing between the three holding sections 65, they may be referred to as the first holding section 651, the second holding section 652, and the third holding section 653, in order from the surface side of the end plate 60.

[0036] The first holding part 651 holds the end plate 60 by placing a connecting wire 50, in this case a U-phase connecting wire 50U, between it and the surface of the end plate 60. That is, a U-phase connecting wire 50U is routed between the first holding part 651 and the end plate 60. The second holding part 652 holds the first holding part 651 by placing a connecting wire 50, in this case a V-phase connecting wire 50V, between it and the first holding part 651. That is, a V-phase connecting wire 50V is routed between the first holding part 651 and the second holding part 652. The third holding part 653 holds the second holding part 652 by placing a connecting wire 50, in this case a W-phase connecting wire 50W, between it and the second holding part 652. That is, a W-phase connecting wire 50W is routed between the second holding part 652 and the third holding part 653.

[0037] The support portion 66 has the function of supporting the connecting wire 50 and keeping the connecting wire 50 away from the surface of the end plate 60. The support portion 66 is provided, for example, between adjacent rising portions 64 in the circumferential direction of the end plate 60, and slightly radially outward from the rising portions 64, that is, between the through portion 61 and the rising portions 64 in the radial direction. The support portion 66 is formed in a shape that protrudes from the surface of the end plate 60.

[0038] The guide portion 67 has the function of guiding the connecting wire 50 extending from the terminal 44 toward the holding portion 65 in the axial direction of the rotor 30. That is, the guide portion 67 guides the connecting wire 50 extending from the terminal 44 toward the surface of the end plate 60. The guide portion 67 is provided between the terminal 44 and the holding portion 65 in the radial direction of the rotor 30. As shown in Figures 11 and 13, the guide portion 67 is formed of an inclined surface that slopes toward the surface of the end plate 60 from the outside toward the inside in the radial direction of the end plate 60.

[0039] The second restricting portion 68 has the function of restricting the movement of the portion of each connecting wire 50 that is routed along the surface of the end plate 60, specifically the portion that is positioned along the guide portion 67, in the direction of the surface of the end plate 60, that is, it has the function of restricting deviation from the guide portion 67. The second restricting portion 68 is provided at a position adjacent to the side surface of the inclined surface of the guide portion 67 and is provided protruding in a rod shape from the surface of the end plate 60.

[0040] The connecting wire 50 extending from the terminal 44 is positioned along the inclined surface of the guide portion 67 and guided to the holding portion 65. Here, the second restricting portion 68, which is provided adjacent to the side surface of the inclined surface of the guide portion 67, functions as a stopper for the connecting wire 50. As a result, the connecting wire 50 positioned along the guide portion 67 forms a gap S1 between it and the surface of the end plate 60 in the radial direction between the guide portion 67 and the holding portion 65. Then, the other portion of the connecting wire 50 positioned along the guide portion 67, or another connecting wire 50, passes through this gap S1 and intersects in the axial direction of the stator 40. In this way, the connecting wire 50 is positioned with a portion that intersects between the guide portion 67 and the holding portion 65.

[0041] Furthermore, the first restricting portion 62, locking portion 63, rising portion 64 or holding portion 65, support portion 66, guide portion 67, or second restricting portion 68 are spaced apart from each other, and it is preferable that the spacing between them is at least 1.5 times the diameter of the connecting wire 50. In particular, it is preferable that the distance between the first restricting portion 62 and the guide portion 67 or second restricting portion 68 that are closest to each other be at least 3 times the diameter of the connecting wire 50. Also, it is preferable that the distance between the rising portion 64 or holding portion 65 and the guide portion 67 or second restricting portion 68 that are closest to each other be at least 3 times the diameter of the connecting wire 50.

[0042] In the following description, of the guide sections 67, the one shown in Figure 11 may be referred to as the first guide section 671, and the one shown in Figure 13 may be referred to as the second guide section 672. The first guide section 671 corresponds to the first holding section 651. The first guide section 671 guides the connecting wire 50, in this case the V-phase connecting wire 50V, between the first holding section 651 and the second holding section 652. The second guide section 672 corresponds to the second holding section 652. The second guide section 672 guides the connecting wire 50, in this case the W-phase connecting wire 50W, between the second holding section 652 and the third holding section 653. The angle of the second guide section 672 with respect to the radial direction of the end plate 60 is greater than the angle of the first guide section 671 with respect to the radial direction of the end plate 60.

[0043] According to the embodiment described above, the electric motor 20 comprises a rotor 30, a stator 40, an end plate 60, and a plurality of connecting wires 50. The stator 40 has a plurality of coils 41. The stator 40 is configured to be rotatable. The stator 40 is positioned with a gap between it and the rotor 30 and has a plurality of coils 41. The plurality of connecting wires 50 are routed along the surface of the end plate 60 to electrically connect the plurality of coils 41.

[0044] The end plate 60 has a rising portion 64 and a plurality of holding portions 65. The rising portion 64 is formed so that the edge of the end plate 60 extends in the axial direction of the stator 40. The plurality of holding portions 65 are provided on the rising portion 64 and hold the plurality of connecting wires 50 while keeping them separated from each other.

[0045] According to this design, the holding portion 65 can hold the connecting wires 50 apart from each other, preventing contact and interference between the connecting wires 50, thereby improving electrical insulation and reliability. Furthermore, even if the number of coils 41 increases due to multi-polarization and the wiring of the connecting wires 50 becomes more complex, the connecting wires 50 can be arranged in an orderly manner, thereby improving the efficiency and quality of assembly work. In addition, by integrally providing the holding portion 65 on the end plate 60, no additional parts are required, simplifying the structure and reducing costs. Moreover, since the holding portion 65 makes it easier to wire the connecting wires 50, it becomes easier to automate the wiring using robots or the like.

[0046] The end plate 60 further has a guide portion 67. The guide portion 67 guides the connecting wire 50 toward the holding portion 65 in the axial direction of the stator 40.

[0047] According to this design, the guide portion 67 can reliably guide the connecting wire 50 towards the holding portion 65, making the wiring work for the connecting wire 50 easier and improving work efficiency. In addition, the wiring path of the connecting wire 50 is stabilized, preventing contact and interference with other components, thereby increasing the reliability of the electric motor.

[0048] Furthermore, by providing the second restricting portion 68 on the side of the inclined surface constituting the guide portion 67 that is close to the holding portion 65, it is possible to prevent the connecting wire 50 from falling off the inclined surface of the guide portion 67 due to assembly errors during manufacturing or vibrations during operation, thereby improving the reliability of the electric motor.

[0049] The connecting wire 50 is positioned so that it intersects with the guide portion 67 and the holding portion.

[0050] This allows the connecting wires 50 to be arranged three-dimensionally, making effective use of wiring space. Therefore, even when the number of coils 41 increases due to multi-polarization, the space occupied by the connecting wires 50 can be reduced, thus preventing the motor 20 from becoming larger. In addition, because the intersections of the connecting wires 50 can be properly managed, wiring can be easily organized, leading to increased efficiency and improved quality in assembly work.

[0051] The stator 40 further includes terminals 44 and terminal connectors 421. The terminals 44 are connected to the beginning and end of the coil 41. The terminal connectors 421 hold the terminals 44. The end plate 60 is formed to penetrate the stator 40 in the axial direction and has through-holes 61 through which at least one of the terminals 44 and the terminal connectors 421 passes.

[0052] According to this design, the terminal 44 and terminal connection portion 421 can be exposed to the outside through the through-hole 61, making it easier to connect the terminal 44 to an external device. In addition, since the terminal 44 and terminal connection portion 421 can be properly supported and fixed by the end plate 60, wire breakage due to vibration or external force can be prevented, and the reliability of the electric motor can be improved.

[0053] The end plate 60 further has a first restricting portion 62. The first restricting portion 62 is provided between the terminal 44 and the holding portion 65 and restricts the movement of the connecting wire 50 away from the end plate 60.

[0054] According to this design, the first restricting portion 62 prevents the connecting wire 50 from moving away from the end plate 60, thereby stabilizing the position of the connecting wire 50. As a result, interference or contact between the connecting wire 50 and other components is prevented, improving the reliability and safety of the electric motor. Furthermore, since the first restricting portion 62 is formed in a roughly L-shaped cantilevered rod form, wiring work is facilitated, and the connecting wire 50 can be accurately connected at the terminal 44, further improving the reliability of the electric motor.

[0055] In the axial direction of the stator 40, the top 641 of the rising portion 64 is located closer to the end plate 60 than the top 441 of the terminal 44.

[0056] According to this design, since the rising portion 64 protrudes more than the terminal 44 in the axial direction of the stator 40, the terminal 44 and connecting wire 50 are less susceptible to damage from external contact or foreign matter contamination, thereby improving the reliability and safety of the electric motor 20. Furthermore, since physical protection is provided by the rising portion 64, the insulation performance can be maintained.

[0057] By arranging the first restricting portion 62, locking portion 63, rising portion 64 or holding portion 65, support portion 66, guide portion 67 or second restricting portion 68, etc., at appropriate distances from each other, for example based on the diameter of the connecting wire 50, wiring work during manufacturing can be easily performed while suppressing excessive pressure or friction of the connecting wire 50 on the uneven portions formed on the end plate 60. This suppresses damage to the connecting wire 50 caused by vibrations during wiring work or operation, and ensures the maintenance of insulation and reliability.

[0058] In this configuration, the electric motor 20 scatters lubricating oil radially outward from the rotor 30 due to the centrifugal force of the rotor 30. However, if the flow of lubricating oil is obstructed by the rising portion 64, the effectiveness of the lubricating oil is reduced. In contrast, in this embodiment, the top portion 641 of the rising portion 64 is located closer to the end plate 60 than the top portion 441 of the terminal 44, thus minimizing obstruction of the lubricating oil flow by the rising portion 64.

[0059] The electric motor 20 may also use, for example, the end plate 60A shown in Figures 14 and 15 instead of the end plate 60 described above. The end plate 60A shown in Figures 14 and 15 differs from the end plate 60 described above mainly in the specific shape of the through-hole. The end plate 60A has a through-hole 61A. The through-hole 61A is shaped like two circumferentially adjacent through-holes 61 of the end plate 60 connected together. The through-hole 61A is provided in a position that overlaps with the space S2 between two circumferentially adjacent coils 41. That is, the space S2 between two circumferentially adjacent coils 41 is open to the outside through the through-hole 61A.

[0060] With this configuration, the lubricating oil and refrigerant that flow into the space S2 between the coils 41 pass through the penetration 61A and exit the end plate 60A. Therefore, it is possible to suppress obstruction of the flow of lubricating oil and refrigerant that flows into the space S2 between the coils 41 by the end plate 60A. As a result, the flow of lubricating oil and refrigerant can be made smoother, and thus the deterioration of the performance of the electric motor 20 caused by the provision of the end plate 60 can be suppressed.

[0061] This disclosure is described in accordance with the embodiments, but it is understood that this disclosure is not limited to such embodiments or structures. This disclosure also includes various modifications and variations within the equivalence. In addition, various combinations and forms, as well as other combinations and forms that include only one, more, or fewer of those elements, fall within the scope and concept of this disclosure. [Explanation of Symbols]

[0062] 1... Compressor, 11... Sealed container, 20... Electric motor, 30... Rotor, 40... Stator, 41... Coil, 421... Terminal connection, 44... Terminal, 441... Terminal top, 50... Connection wire, 50U... U-phase connection wire, connection wire, 50V... V-phase connection wire, connection wire, 50W... W-phase connection wire, connection wire, 50Y... Neutral connection wire, connection wire, 60, 60A... End plate, 61, 61A... Through-hole, 62...regulating section, 64...rising section, 641...top of rising section, 65...holding section, 651...first holding section, holding section, 652...second holding section, holding section, 653...third holding section, holding section, 67...guide section, 671...first guide section, guide section, 672...second guide section, guide section, 90...refrigeration cycle device, 91...evaporator, 92...condenser, S1...gap, S2...space

Claims

1. A rotor configured to be rotatable, A stator having a plurality of coils is positioned with a gap between it and the rotor, An end plate provided on the axial end side of the stator, The end plate comprises a plurality of connecting wires that are routed along the surface of the end plate and electrically connect the plurality of coils, The aforementioned end plate is The edge of the end plate is a rising portion that extends in the axial direction of the stator, The rising portion includes a plurality of holding parts that hold the plurality of connecting wires apart from each other, Electric motor.

2. The end plate further has a guide portion that guides the connecting wire toward the holding portion in the axial direction of the stator. The electric motor according to claim 1.

3. The connecting wire is arranged such that it intersects with the guide portion and the holding portion. The electric motor according to claim 2.

4. The aforementioned stator is Terminals connected to the beginning and end of the winding of the coil, It further comprises a terminal connection portion that holds the aforementioned terminal, The end plate is formed to penetrate the stator in the axial direction and has a through portion through which at least one of the terminal and the terminal connection portion passes. The electric motor according to claim 1.

5. The end plate further includes a restricting portion provided between the terminal and the holding portion to restrict the movement of the connecting wire away from the end plate. The electric motor according to claim 4.

6. In the axial direction of the stator, the top of the rising portion is located closer to the end plate than the top of the terminal. The electric motor according to claim 4.

7. In the circumferential direction of the end plate, the space between adjacent coils is in communication with the outside through the penetration. The electric motor according to claim 4.

8. An electric motor according to any one of claims 1 to 7, A sealed container housing the aforementioned electric motor, A compressor equipped with a compressor.

9. The compressor according to claim 8, A condenser into which the refrigerant discharged from the compressor flows, An evaporator into which the refrigerant discharged from the condenser flows, A refrigeration cycle device equipped with a refrigeration cycle system.

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