Stator, motor and compressor

Abstract

A stator (2, 2A) having the following features: a stator core (21) comprising an annular core back (211) surrounding a vertically extending central axis (9) and a plurality of teeth (212) extending from the core back (211) to a radial inner surface; a plurality of coils (23) constructed with conductor wires wound around the teeth (212); an insulator (22, 22A) that insulates the stator core (21) from the coil (23); a plurality of connecting wires (8) extending upwards from the coil (23); and a guide element (24, 24A) that carries the connecting wire (8) on an upper side of the coil (23), wherein the guide element (24, 24A) is an insulating body comprising the following: a lower plate (41, 41A) which spreads out in a ring shape around the central axis (9); an inner wall (42) extending upwards from an inner perimeter of the lower plate (41, 41A); and an upper plate (43) extending from the inner wall (42) to a radial outer surface, a single connecting wire receiving space (40) is provided on an upper side of the lower plate (41, 41A), a lower side of the upper plate (43) and a radial outer side of the inner wall (42), and the majority of connecting wires (8) are arranged in a circumferential direction along the inner wall (42) in the connecting wire receiving space (40).

Description

Field of invention

[0001] The present invention relates to a stator, a motor and a compressor. Description of the related technique

[0002] In recent years, there has been a demand for miniaturized and thinner motors. To miniaturize a motor, one approach is to reduce the space between components. However, in the case of a motor's stator, reducing the space between components increases the risk of a wire drawn from a coil coming into contact with the coil, a metal housing, or similar components, potentially causing a short circuit. Therefore, it is necessary to incorporate an insulating element between the wire drawn from the coil and another conductive component in the motor.

[0003] JP 2014-187 797 A, for example, describes a structure in which a holder is arranged at one end in the axial direction of a stator core, and a plurality of leads are arranged within the holder. The leads include a supply lead, which provides current from an external power source, and a neutral lead, which connects the leads to form a neutral point. In the structure described in JP 2014-187 797 A, the holder comprises a plurality of steps such that the diameter is gradually reduced in the axial direction towards the opposite side of the stator core. The supply lead is configured such that the plurality of steps have different phases, and the same steps have the same phase.

[0004] In the design of JP 2014-187 797 A, however, the majority of steps are in the axial direction. Consequently, one dimension in the axial direction of the stator is increased. Thus, the overall motor is not miniaturized to a significant degree. In the design of JP 2014-187 797 A, to connect the neutral point lead wire, the neutral point busbar is located separately from the holder at the end in the axial direction of the stator core. For this reason, it is necessary to connect the end of the lead wire to the neutral point busbar after the lead wire has been wound around the holder. Consequently, the number of steps in the stator's construction increases.

[0005] Other electric motors are known from DE 601 19 051 T2, JP 3 414 944 B2 and JP 2002 - 247 792 A.

[0006] It is an object of the present invention to create a stator structure in which, while the insulation from the coil is ensured, the connecting wire can be arranged compactly without requiring a busbar. BRIEF SUMMARY OF THE INVENTION

[0007] According to one aspect of the present invention, a stator used for an inside rotor type motor comprises: a stator core comprising an annular core back surrounding a vertically extending central axis and a plurality of teeth extending from the core back to a radial inner surface; a plurality of coils constructed with lead wires wound around the teeth; an insulator, which is an insulating body that isolates the stator core from the coil; a plurality of connecting wires extending upward from the coil; and a guide element that carries the connecting wire on an upper side of the coil.The guide element is an insulating body comprising: a lower plate extending in a ring around the central axis; an inner wall extending upwards from an inner circumference of the lower plate; and an upper plate extending from the inner wall to a radial outer surface; a single terminal wire receiving space is present on an upper side of the lower plate, a lower side of the upper plate, and a radial outer surface of the inner wall; and the plurality of terminal wires are arranged in a circumferential direction along the inner wall in the terminal wire receiving space.

[0008] According to the present application, while ensuring insulation from the coil, the connecting wire can be arranged compactly without the need for a busbar. Consequently, both miniaturization of the stator and insulation of the connecting wire can be achieved. Furthermore, the connecting wire can be easily positioned between the lower and upper plates by wrapping it around the inner wall.

[0009] The above and other elements, features, steps, characteristics and advantages of the present disclosure will become apparent from the following detailed description of the preferred embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic diagram of a compressor. Fig. Figure 2 is a longitudinal section view of an engine. Fig. Figure 3 is a top view of the engine. Fig. Figure 4 is a perspective view of a stator. Fig. Figure 5 is a view that conceptually illustrates a connection of coils. Fig. Figure 6 is a top view of a guide element. Fig. Figure 7 is a stretched perspective view of the stator. Fig. Figure 8 is a longitudinal section view illustrating a metal casting mold used for injection molding the guide element. Fig. Figure 9 is a sectional view illustrating a closer environment of the guide element. Fig. Figure 10 is a view illustrating a projection and a pair of regulating surfaces when viewing the projection and the pair of regulating surfaces from a radial inside view. Fig. Figure 11 is a perspective view of the stator at step S7. Fig. Figure 12 is a perspective view of the stator at step S10. Fig. Figure 13 is a perspective view of a stator according to a modification. DETAILED DESCRIPTION OF PREFERRED EXECUTION EXAMPLES

[0010] An exemplary embodiment of the present invention is described below with reference to the drawings. In the present application, a direction parallel to a central axis of a motor is referred to as an "axial direction," a direction perpendicular to the central axis of the motor is referred to as a "radial direction," and a direction along a circular arc with the central axis of the motor as its center is referred to as a "circumferential direction." However, the above "direction parallel to" also includes a substantially parallel direction. The above "direction perpendicular to" also includes a substantially perpendicular direction.

[0011] In the present application, a shape and positional relationship of each component are defined with the axial direction being the vertical direction and with a guide element side being the top side with respect to the coil. However, it is not intended that the definition of the vertical direction restricts the orientation of a stator, motor, and compressor according to the present invention during manufacture and use. <1. Compressor>

[0012] Fig. Figure 1 is a schematic diagram illustrating a compressor 100 according to an embodiment of the present invention. The compressor 100 is an electric device driven by a motor 1. When the compressor 100 is operated, a gas, which is a refrigerant, is compressed. The compressor 100 is used, for example, in the air conditioning system of an automobile. As shown in Figure 1, the compressor 100 is used, for example, in the air conditioning system of an automobile. Fig. As illustrated in Figure 1, the compressor 100 comprises a housing 110, a compression mechanism 120, the motor 1 and a control device (not illustrated).

[0013] The housing 110 has an intake port 111 located in an upper section and an outlet port 112 located in a side section. The compression mechanism 120 and the motor 1 are housed within the housing 110. The compression mechanism 120 and the motor 1 are connected to each other via a shaft 130. When the motor 1 is driven, the shaft 130 is rotated by the driving force of the motor 1. The rotation of the shaft 130 operates the compression mechanism 120.

[0014] When driving compressor 100, as indicated by an arrow Y1 in Fig. As indicated in Figure 1, the low-temperature, low-pressure coolant is drawn through the suction port 111 into an interior of the housing 110. The drawn-in coolant is compressed by the compression mechanism 120 within the housing 110. The compressed coolant, which has a high temperature and high pressure, is discharged through the discharge port 112 to an exterior surface of the housing 110. <2. Structure of an engine>

[0015] A detailed structure of motor 1 is described below. Fig. Figure 2 is a longitudinal section view of engine 1. Fig. Figure 3 is a top view of engine 1. Fig. Figure 4 is a perspective view of a stator 2. The motor 1 is what is called an inside-rotor type motor, including the annular stator 2 and a rotor 3 arranged on a radial inner surface of the stator 2. The stator 2 is fixed to the housing 110 of the compressor 100. The rotor 3 is rotatably supported by bearings with respect to the housing 110 (not illustrated). When the motor 1 is driven, the rotor 3 rotates about a central axis 9.

[0016] As in Fig. 2, Fig. 3 to Fig. As illustrated in Figure 4, the stator 2 comprises a stator core 21, an insulator 22, a plurality of coils 23, a guide element 24, three connection terminals 25, a spacer 26 (housing base), and a cover element 27 (housing body). To electrically connect a control device of the compressor 100 and the motor 1, the three connection terminals 25 are connected to external connection terminals provided in the control device. That is, the connection terminal 25 is connected to the external connection terminal provided separately from the motor 1.

[0017] The stator core 21 is a single laminated body formed by laminating electromagnetic steel plates. The stator core 21 comprises a core back 211 and a plurality of (in this example, twelve) teeth 212. The core back 211 surrounds the central axis 9 in an annular fashion. An outer circumferential surface of the core back 211 is fixed to the inner circumferential surface of the housing 110. Each of the plurality of teeth 212 extends radially inward from the core back 211. The plurality of teeth 212 are arranged at equal intervals in one circumferential direction.

[0018] The stator core 21 can be formed by combining a plurality of laminated bodies. For example, the stator core 21 can be formed by combining the core back 211 and the teeth 212, which are different structural elements.

[0019] The insulator 22 is made of a resin that forms an insulating body. The insulator 22 comprises a plurality of insulating sections 221, a plurality of upper inner walls 222, a plurality of lower inner walls 223, an upper annular section 224, a lower annular section 225, an upper outer wall 226, and a lower outer wall 227. The plurality of insulating sections 221 is provided in each of the teeth 212. The insulating section 221 covers an upper surface, a lower surface, and both circumferential end surfaces of each of the teeth 212. The plurality of upper inner walls 222 extends upward from one end of the radial inner surface of the insulating section 221. The plurality of lower inner walls 223 extends downward from the end of the radial inner surface of the insulating section 221.

[0020] The upper annular section 224 is an annular section located on the upper surface of the nuclear ridge 211. At least a portion of the upper surface of the nuclear ridge 211 (in this example, a region excluding an outer circumferential edge of the upper surface of the nuclear ridge 211) is covered by the upper annular section 224. The lower annular section 225 is an annular section located on the lower surface of the nuclear ridge 211. At least a portion of the lower surface of the nuclear ridge 211 (in this example, a region excluding the outer circumferential edge of the lower surface of the nuclear ridge 211) is covered by the lower annular section 225.

[0021] The upper outer wall 226 extends upwards from the upper annular section 224. The upper outer wall 226 has a cylindrical shape and extends along an upper side of the core back 211. The upper outer wall 226 includes a stepped surface 2261 that extends perpendicular to an axial direction on its radial inner surface. The upper outer wall 226 includes a plurality of notches 228 (first notches) that extend downwards from an upper end and penetrate radially. The plurality of notches 228 are provided at intervals around the circumference. The lower outer wall 227 extends downwards from the lower annular section 225.

[0022] The coil 23 is constructed with a conducting wire wound around the insulating section 221. That is, the conducting wire is wound around the teeth 212, which, together with the insulating section 221 positioned between them, form a magnetic core. The insulating section 221 is positioned between the teeth 212 and the coil 23 to insulate the teeth 212 from the coil 23. The coil 23 is positioned between the upper inner wall 222 and the lower inner wall 223, and between the upper outer wall 226 and the lower outer wall 227. This prevents the winding of the coil 23 from collapsing.

[0023] Motor 1 is a synchronous three-phase motor driven by a three-phase alternating current consisting of a U-phase, a V-phase, and a W-phase. Consequently, the plurality (twelve in this example) of coils 23 comprises a plurality (four in this example) of U-phase coils 23u supplied with a U-phase current, a plurality (four in this example) of V-phase coils 23v supplied with a V-phase current, and a plurality (four in this example) of W-phase coils 23w supplied with a W-phase current. Fig. Figure 5 is a view that conceptually illustrates a connection of the coils 23. As in Fig. As illustrated in Figure 5, in this example two U-phase coils 23u, two V-phase coils 23v, and two W-phase coils 23w are connected in a star configuration to form a set of coil groups 230. Two sets of coil groups 230 are connected in parallel. The star connection is suitable for high-efficiency rotation at high speeds (e.g., 2000 to 8000 rpm), for example, in an automotive air conditioning system, because it allows for efficient current flow compared to other connection methods.

[0024] The two U-phase coils 23u, connected to a neutral point 80, are formed by a lead wire. The two V-phase coils 23v, connected to a neutral point 80, are formed by a lead wire. The two W-phase coils 23w, connected to a neutral point 80, are formed by a lead wire. Thus, in a set of coil groups 230, a neutral point 80 is formed by collectively connecting one end of the coils 23u, 23v, 23w. The other ends of the coils 23u, 23v, 23w connected to the neutral point 80 are connected to the other ends of the in-phase coils 23u, 23v, 23w of the other coil group 230 and connected to a connecting terminal 25. Thus, the three leads drawn from the two sets of coil groups 230 are connected to an external power supply.

[0025] Both ends of each lead wire are pulled upwards from coil 23. Hereinafter, a lead wire pulled upwards from coil 23 is referred to as a "connection wire 8". Specifically, among the connection wires 8 pulled from the U-phase coil 23u, the connection wire 8 on the neutral point 80 side is referred to as the U-phase common wire 8uc, and the connection wire 8 on the power supply side is referred to as the U-phase feed wire 8up. Among the connection wires 8 pulled from the V-phase coil 23v, the connection wire 8 on the neutral point 80 side is referred to as the V-phase common wire 8vc, and the connection wire 8 on the power supply side is referred to as the V-phase feed wire 8vp.Among the connecting wires 8 that are pulled out of the W-phase coil 23w, the connecting wire 8 on the neutral point 80 side is referred to as the W-phase common wire 8wc, and the connecting wire 8 on the power supply side is referred to as the W-phase feed wire 8wp.

[0026] The supply lines 8up, 8vp, and 8wp of the respective phases, which are parts of the majority of connecting wires 8, are covered with an insulating tube 83 made of an insulating material. Consequently, it is possible to prevent the supply lines 8up, 8vp, and 8wp of the respective phases from touching each other and becoming electrically short-circuited. For the common lines 8uc, 8vc, and 8wc of the respective phases, only a portion, encompassing the neutral point 80, is covered with the insulating tube 83.

[0027] Fig. Figure 6 is a top view of the guide element 24. Fig. Figure 7 is a stretched perspective view illustrating stator 2, with the connecting wire 8 omitted. As in Fig. 4, Fig. 6 and Fig. As illustrated in Figure 7, the guide element 24 is an annular element located above the plurality of coils 23. The plurality of connecting wires 8, which are drawn from the plurality of coils 23, are held by the guide element 64. The three connecting terminals 25, the spacer 26, and the cover element 27 are arranged on the guide element 24. The connecting terminal 25 is made of a metal such as copper, which is a conductor of electricity. The three connecting terminals 25 are connected to the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp from the plurality of connecting wires 8. As shown in Figure 7, the connecting wires 24 are arranged on the guide element 24. Fig. As illustrated in Figure 5, the three connection terminals 25 are electrically connected to a circuit board 70, which supplies a drive current. The circuit board 70 forms part of the control device.

[0028] Each of the guide element 24, the spacer 26, and the cover element 27 is made of a resin that acts as an insulator. In the present embodiment, these elements are exposed to the coolant when the compressor 100 is driven. Consequently, a material with high coolant resistance is preferably used for the guide element 24, the spacer 26, and the cover element 27. For example, polyphenylene sulfide (PPS), liquid crystal polymer (LCP), or polybutylene terephthalate (PBT) can be used for the guide element 24, the spacer 26, and the cover element 27. The guide element 24, the spacer 26, and the cover element 27 can be made of the same material or of different materials.

[0029] Further detailed structures of the guide element 24, the three connecting connections 25, the spacer 26 and the cover element 27 are described below.

[0030] The rotor 3 of the present embodiment comprises a rotor core 31 and a plurality of magnets 32.

[0031] The rotor core 31 is a laminated body formed by laminating electromagnetic steel plates. The rotor core 31 comprises an insertion hole 30 and a plurality of magnet receiving sections 30A. The insertion hole 30 penetrates the laminated body axially in the center of the rotor core 31. The plurality of magnet receiving sections 30A are located on a radial outer surface of the insertion hole 30. The shaft 130 is press-fitted into the insertion hole 30 of the rotor core 31. Thus, the rotor core 31 and the shaft 130 are fixed together.

[0032] The majority of magnets 32 are arranged on the outer circumferential surface of the rotor core 31, facing radially opposite the teeth 212 of the stator 2. The majority of magnets 32 are arranged between end plates 30B, which are provided on the end faces of the rotor core 31. The rotor core 31 is fastened to the end plate 30B by means of a rivet 30C.

[0033] When the motor 1 is driven, the U-phase current, the V-phase current, and the W-phase current are supplied from the external power source through the circuit board 70 and the connection terminal 25 to the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp, respectively. This enables a rotating magnetic field to be generated in the majority of the teeth 212 of the stator core 21. Thus, a circumferential torque is generated between the teeth 212 and the magnets 32. As a result, the rotor 3 rotates about the central axis 9 relative to the stator 2. <3. Detailed structures of guide element, connection fitting, spacer and cover element>

[0034] The more detailed structures of the guide element 24, the three connecting connections 25, the spacer 26 and the cover element 27 are described below.

[0035] As in Fig. As illustrated in Figures 2 to 4, 6 and 7, the guide element 24 comprises a lower plate 41, an inner wall 42, and a plurality of upper plates 43. The lower plate 41 extends in a ring shape and a plate shape around the central axis 9. The inner wall 42 extends in a cylindrical shape from the inner circumferential section of the lower plate 41 to the upper side. However, the entire circumferential section of the inner wall 42 is not necessarily continuous. For example, a plurality of arcuate inner walls 42, extending from the inner circumferential section of the lower plate 41 to the upper side, can be arranged at intervals in the circumferential direction. The plurality of upper plates 43 extend radially outward from the upper section of the inner wall 42. In the present embodiment, the plurality of upper plates 43 are arranged at equal intervals in the circumferential direction.However, the upper plate 43 is omitted in the circumferential position where the spacer 26 and the cover element 27, which will be described later, are located.

[0036] The guide element 24 comprises a connecting wire receiving space 40, which is a single arc-shaped space formed by the upper side of the lower plate 41, the lower side of the plurality of upper plates 43, and the radial outer surface of the inner wall 42. At this point, a gap exists between the lower plate 41 and a portion of the inner wall 42 or between the adjacent upper plates 43, and the space formed by this gap is also part of the connecting wire receiving space 40. The plurality of connecting wires 8 are wound around the inner wall 42. Consequently, the plurality of connecting wires 8 are arranged circumferentially along the outer circumferential surface of the inner wall 42 within the single connecting wire receiving space 40. The guide element 24 is positioned between the upper inner wall 222 and the upper outer wall 226 and is fixed to the insulator 42 by a fixing method that will be described later.At this point, the lower plate 41 of the guide element 24 abuts the step surface 2261 of the insulator 22.

[0037] The lower plate 41 is arranged between the plurality of connecting wires 8, which are located in the connecting wire receiving space 40, and the plurality of coils 23. Consequently, the coil 23 and the connecting wire 8 are insulated from each other. The plurality of upper plates 43 are arranged on the upper side of the connecting wire 8, thus preventing extrusion of the connecting wire 8 towards the upper side. The inner wall 42 is arranged on the radial inner side of the connecting wire 8, thus preventing extrusion of the connecting wire 8 towards the radial inner side. In this way, the plurality of connecting wires 8 can be arranged compactly on the upper side of the stator 2 by housing the connecting wire 8 in the single connecting wire receiving space 40.

[0038] The majority of connecting wires 8 are drawn from different regions in the circumferential direction of the stator core 21. At this point, since the connecting wire receiving space 40 is provided in the arc shape, the connecting wire 8 is readily positioned in the connecting wire receiving space 40, even if the connecting wire 8 is drawn from any region. Even if the connecting wire receiving space 40 is not located on the radial inner side of the region from which the connecting wire 8 is drawn, the connecting wire 8 can readily be guided along the inner wall 42 of the guide element 24 to the connecting wire receiving space 40.

[0039] This means that the use of the guide element 24 allows the majority of connecting wires 8 to be arranged without protruding significantly from the top, radial inner, and radial outer sides of the stator 2, while ensuring insulation from the stator core 21. This allows for both miniaturization of the stator 2 and insulation of the connecting wire 8. The radial outer side of the connecting wire receiving space 40 is open, allowing the connecting wire 8, drawn from the coil 23, to be wound directly around the inner wall 42. Consequently, the connecting wire 8 can be easily arranged in the connecting wire receiving space 40.

[0040] In the present embodiment, a groove 411 extending circumferentially is formed in the lower plate 41. At least some of the majority of connecting wires 8 are arranged in the groove 411. Consequently, displacement of the connecting wire 8 is prevented. The connecting wire 8 can also be prevented from protruding upwards from the upper surface of the lower plate 41. Consequently, the size in the axial direction of the stator 2 can be further reduced. Preferably, the upper plate 43 extends beyond the groove 411 to the radial outer surface.

[0041] In the present embodiment, the majority of upper plates 43 are arranged radially with respect to the central axis 9. In particular, the upper plates 43, like many of the majority of coils 23, are arranged at equal intervals in the circumferential direction. Thus, compared to the case where the upper plate spreads continuously in an arc shape, more spaces communicating with the inside and outside are formed on the upper side of the connecting wire receiving space 40 by arranging the majority of upper plates 43 radially. Consequently, as indicated by arrow Y1 in Fig. As shown in Figure 1, the contact resistance of the coolant flowing in the immediate vicinity of the stator 2 is reduced when the compressor 100 is driven, and the flowability of the coolant is improved. The heat dissipation of the stator 2, including the connecting wire 8, is also improved. The number of upper plates 43 of the guide element 24, the interval between the adjacent upper plates 43, and the circumferential width of the upper plate 43 are not limited to the present embodiment.

[0042] Among the majority of connecting wires 8, the leading ends of the U-phase common wire 8uc, the V-phase common wire 8vc, and the W-phase common wire 8wc are electrically connected to each other by welding. The connecting section is the neutral point 80. In this example, there are two neutral points 80 because there are two sets of star-connected coil groups 230. The U-phase common wire 8uc, the V-phase common wire 8vc, and the W-phase common wire 8wc can be connected to each other by another method, for example, by soldering instead of welding.

[0043] The neutral point 80 is located on the upper side of the lower plate 41. The neutral point 80 is fixed to a portion of the guide element 24 by a fastening element 81, which will be described later. Consequently, movement of the neutral point is restricted. A constant tension is generated in the circumferential direction of each connecting wire 8 by wrapping the majority of connecting wires 8 around the inner wall 42. A frictional force is generated by the contact between each section of the guide element 24 and the connecting wires 8, and by the contact between the connecting wires 8. Even if the first fastening element 81 is eliminated, the position of the neutral point 80 can sometimes be maintained by the tension or the frictional force. However, using the first fastening element 81 can securely fix the position of the neutral point 80 without relying on the tension or the frictional force.

[0044] The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are fixed to a portion of the guide element 24 by a second fastening element 82, which will be described later. Consequently, the movement of the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp is restricted. A constant tension is generated in the circumferential direction of each connecting wire 8 by wrapping the majority of connecting wires 8 around the inner wall 42. A frictional force is generated by the contact between each section of the guide element 24 and the connecting wires 8, and by the contact between the connecting wires 8 themselves.Even when the second fastening element 82 is eliminated, the positions of the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp can sometimes be maintained by tension or friction. However, the use of the second fastening element 82 can securely fix the positions of the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp without relying on tension or friction.

[0045] A plurality of notches 417 (second notches) are formed at intervals in an outer circumferential edge of the lower plate 41 in the circumferential direction. The notch 417 is radially recessed inwards and penetrates in the axial direction. The lower plate 41 is arranged on the inner circumferential surface of the upper outer wall 226 of the insulator without forming a gap in the radial direction, so that a connecting wire 8 is drawn through the notch 417 from the lower side to the upper side of the guide element 24, as shown in an enlarged view of Fig. 4 is illustrated.

[0046] As in Fig. 3 and Fig. As illustrated in Figure 6, a plurality of holes 410 are produced in the lower plate 41. Each of the plurality of holes 410 penetrates the lower plate 41 axially on the underside of the upper plate 43. When viewed axially, a region of the upper plate 43 is smaller than a region of the hole 410. Each of the upper plates 43 overlaps the hole 410 axially. Since the lower plate 41 encompasses the hole 410, the flow resistance of the coolant flowing in the immediate vicinity of the stator 2 decreases when the compressor 100 is driven, thus improving the coolant's flowability. The heat dissipation of the stator 2, including the connecting wire 8, is also improved.The shape of the hole 410 and the number of holes 410 can vary, as long as there is no disturbance with regard to an insulating property between the connecting wire 8 and the coil 23, a holding stability of the connecting wire 8, a stiffness of the guide element 24 and the like.

[0047] Fig. Figure 8 is a longitudinal sectional view illustrating part of a metal casting mold used for injection molding the guide element 24. As shown in Fig. As illustrated in Figure 8, the guide element 24 is obtained by pouring molten resin into a space 93 formed between a lower metal casting 91 and an upper metal casting 92, and by allowing the molten resin to harden. At this point, part of the lower metal casting 91 is positioned in a section 911 that forms the hole 410 of the lower plate 41. The lower surface of the upper plate 43 is formed by a surface 912 located above the section 911 of the lower metal casting 91. After the molten resin has hardened, the lower metal casting 91 and the upper metal casting 92 are separated vertically from each other.

[0048] In this way, if the hole 410, which is larger than the upper plate 43, is provided below the upper plate 43, the upper plate 43 can be formed solely by means of the metal casting mold moving in a vertical direction. That is, the upper plate 43 can be formed without the use of a sliding metal casting mold moving in a lateral direction. Consequently, the costs for forming the guide element 24 can be reduced.

[0049] Each of the plurality of holes 410 overlaps in the axial direction a tooth gap 212a formed between adjacent teeth 212 in the circumferential direction. As indicated by the arrow Y1 in Fig. As indicated in Figure 1, when compressor 100 is driven, the coolant flowing in the immediate vicinity of stator 2 also flows through the majority of holes 410 into the tooth gap 212a. At this point, the coolant's flow resistance is reduced because hole 410 and tooth gap 212a overlap axially, thus improving the coolant's flowability. Simultaneously, the heat generated in coil 23 is dissipated by the coolant, and heat dissipation is further enhanced by the coolant's good flowability. In this way, heat generation by stator 2 can be prevented or reduced, thereby improving the efficiency of compressor 100 and motor 1. The improved coolant flowability also enhances the compression efficiency of compressor 100.

[0050] In the present embodiment, the area of ​​the upper plate 43 is smaller than the area of ​​the hole 410 when viewed in the axial direction. Therefore, the upper plate 43 does not completely close the upper section of the hole 410 when viewed from above. This further reduces the flow resistance of the coolant in the hole 410.

[0051] The connecting terminal 25 is a metal component with a cylindrical shape and a base, extending axially. The three connecting terminals 25 are arranged on the upper surface of the lower plate 41 of the guide component 24. The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are each connected to the three connecting terminals 25. The supply lines 8up, 8vp, and 8wp are connected to the connecting terminal 25, for example, by welding.

[0052] Fig. Figure 9 is a sectional view illustrating the immediate surroundings of the guide element 24. As in Fig. 4, Fig. 7 and Fig. As illustrated in Figure 9, the three connection terminals 25 are held by a terminal housing constructed with the spacer 26 and the cover element 27. The terminal housing is fixed to the guide element 24.

[0053] The spacer 26 has an arc shape along the lower plate 41 and is a resin component that extends in a plate shape with substantially the same width as the lower plate 41. Three through holes 261, penetrating axially, are provided in the spacer 46 at intervals around its circumference. The connecting terminal 25 is inserted into the through hole 261. An insulating wall 261a is provided around the through hole 261 to ensure the insulation of the adjacent connecting terminal 25. Part of the insulating wall 261a is notched to allow the connecting wire 8 to be pulled from the connecting terminal 25, which is inserted into the through hole 261. Three upwardly projecting projections 412 are provided at intervals around the circumference of the upper surface of the lower plate 41.The spacer 26 is arranged such that each through-hole 261 overlaps the projection 412 in the axial direction. Consequently, the connecting connector 25 abuts the projection 412 through the through-hole 261.

[0054] A flange 262 is provided on the inner circumferential edge of the spacer 26. A recess 421, which extends in the axial direction, is provided at the upper end of the inner wall 42 of the guide element 24. The flange 262 fits into the recess 421. Consequently, the spacer 26 is positioned circumferentially and axially. An outer circumferential wall 263 is provided on the outer circumferential edge of the spacer 26. The outer circumferential wall 263 receives the connecting wire 8, which is connected to the connecting terminal 25, in the space (receiving groove) formed between the outer circumferential wall 263 and a portion of the insulating wall 261a. A step 263a, provided in a lower section of the outer circumferential wall 263, abuts the stepped surface 2261 of the insulator 22.Thus, by arranging the spacer 26 on the upper side of the lower plate 41, through which the connecting wire 8 runs, the spacer 26 prevents the extrusion of the connecting wire 8, and the spacer 26 holds the three connecting terminals 25, while the insulation of the three connecting terminals 25 is secured from each other.

[0055] The cover element 27 has an arc shape along the lower plate 41 and is a resin element that extends in the plate shape with approximately the same width as the lower plate 41. A circumferential length of the cover element 27 projects slightly from both ends of the spacer 26. Three through holes 271, penetrating axially, are provided in the cover element 27 at positions that axially overlap the three through holes 261 of the spacer 26. Two second through holes 272, penetrating axially, are provided in the cover element 27 at both circumferential end faces of the three through holes. The upper side of the second through hole 272 is recessed. The cover element 27 has an inner circumferential wall 274 at its inner circumferential edge and an outer circumferential wall 275 at its outer circumferential edge.Both ends in the circumferential direction of the inner circumferential wall 274 abut the inner wall 42 and other sections, unless both ends face the inner circumferential edge of the spacer 26 with a gap. Both ends in the circumferential direction of the outer circumferential wall 275 abut the upper outer wall 226 of the insulator 22 and the other sections, unless both ends face the outer circumferential edge of the spacer 26 with a gap. Projections 275a, extending axially downwards, are provided at both ends in the circumferential direction of the outer circumferential wall 275. The projection 275a is fitted into the notch 228 of the upper outer wall 226. Consequently, the cover element 27 is positioned circumferentially with respect to the insulator 22.

[0056] The cover element 27 is positioned on the upper side of the spacer 26 such that each connecting terminal 25 is inserted into the through-hole 271. The connecting terminal 25 has a connecting section 25a that connects the connecting wire 8 and a projection 25b on the opposite side to the connecting section 25a. The connecting section 25a and the projection 25b extend in a direction perpendicular to the axial direction of the connecting terminal 25. Therefore, when the cover element 27 is in place, the connecting section 25a and the projection 25b of the connecting terminal 25 are pressed downwards in the axial direction by the cover element 27. Consequently, the connecting terminal 25 is stably supported by the projection 412.The connection port has a cylindrical shape with a base, and the external connection is inserted axially into the interior of the connection port 25. Even if axial stress is applied to the upper side of the connection port 25 when the external connection is withdrawn from the connection port 25, the connection ports 25 are not detached from the connection housing. The outer diameter of the connection port 25 is smaller than the inner diameters of the through holes 261, 271, so that the connection port 25 has clearance with respect to the through holes 261, 271.Consequently, even if the axes of the external port and the connecting port 25 are slightly misaligned, the external ports can be inserted smoothly into the connecting port 25 because the connecting port 25 is movable through its clearance. The connecting port 25 can also be fixed in place by positioning it between the cover element 27 and the spacer 26. However, the connecting port 25 is supported by the projection 412 through the through-hole 261 formed in the spacer 26, thus positioning the connecting port 25 axially with the guide element 24 as a reference. When the connecting port 25 is supported by the spacer 26, dimensional errors of both the guide element 24 and the spacer 26 affect the positioning accuracy of the connecting port 25.Consequently, the positioning accuracy of the connection terminal 25 in the axial direction in the stator 2 can be improved if the connection terminal 25 is supported by the projection 412.

[0057] Screws 273a are inserted into the two second through-holes 272 of the cover element 27. The lower end of the screw 273a is connected to a nut 273b, which is fixed to the lower plate 41. Consequently, the cover element 27 and the guide element 24 are fixed to each other, with the spacer 26 positioned between them. That is, the connection housing is attached to the guide element 24. A nut retaining section 413 is provided in the lower plate 41, the nut retaining section 413 being a cavity with the same shape as the nut 273b and having a side hole and a top hole. The nut 273b is press-fitted and fixed to the nut retaining section 413 from the side hole.

[0058] The nut 273b can be formed integrally with the guide element. In this case, the fixing element is constructed with the screw 273a and the nut 273b.

[0059] As described above, motor 1 is exposed to the coolant at the time of operation, thus limiting the material options for motor 1. This means that, depending on the interaction between the coolant and a resin component, the resin component is occasionally chemically altered by the coolant, generating fine particles. Sometimes these fine particles clog a coolant passage of compressor 100. For this reason, as described above, PPS, LCP, and PBT, which exhibit excellent coolant resistance, resulting in minimal alteration of such resin components, are used for the guide element 24, the spacer 26, and the cover element 27, respectively. Although PPS and LCP exhibit excellent coolant resistance, they are particularly hard and brittle.Consequently, if a snap-fit ​​fastening method is adopted, in which the components are elastically deformed and hooked into place, it is necessary to increase the size of a hook section relative to a commonly used material (for example, PA66). As a result, the size increases in the axial direction of the entire stator. Furthermore, PPS and LCP are also unsuitable for thermal welding. It follows from the above that sometimes a conventional fastening method such as a snap-fit ​​or thermal welding is not used to fix the cover component 27. In such cases, the use of the fixing component, which, as in the present embodiment, is designed with the screw 273a and the nut 273b, can fix the terminal housing, including the connecting terminal 25, to the guide component 24 without affecting the coolant resistance.

[0060] The connecting port 25 can be arranged to insert the external connecting port in the axial direction, together with the connection housing comprising the spacer 26 and the cover element 27, without protruding from the annular region which, in plan view, is surrounded by an innermost diameter of the teeth 212 and an outermost diameter of the core back 211. <4. Manufacturing process of a stator>

[0061] A manufacturing process for stator 2 is described below.

[0062] In the manufacture of the stator 2, the insulator 22 is first attached to the stator core 21 (step S1). Six conductor wires are wound around the insulating sections 221, which cover the teeth 212 in the insulator 22. Consequently, twelve coils 23 are formed (step S2). The twelve connecting wires 8, which are constructed with two U-phase common wires 8uc, two V-phase common wires 8vc, two W-phase common wires 8wc, two U-phase supply wires 8up, two V-phase supply wires 8vp, and two W-phase supply wires 8wp, extend from the twelve coils 23.

[0063] The connecting wires 8 are pulled from the coil 23 through the notches 228 of the insulator 22 to the radial outer side and temporarily withdrawn (step S3).

[0064] The leading ends of a U-phase common conductor 8uc, a V-phase common conductor 8vc, and a W-phase common conductor 8wc are then bundled and welded together. This electrically connects the U-phase common conductor 8uc, the V-phase common conductor 8vc, and the W-phase common conductor 8wc to form the neutral point 80 in one of the coil groups 230. Similarly, the neutral point 80 is formed for the other coil group 230 (step S4).

[0065] The guide element is then attached to the insulator 22 (step S5). First, the guide element 24 is positioned on the radial inner side of the upper outer wall 226. The lower surface of the lower plate 41 of the guide element 24 is placed on the stepped surface of the upper outer wall 226. At this point, the lower ends of the plurality of notches 228 provided in the upper outer wall 226 are located below the lower surface of the lower plate 41. The plurality of connecting wires 8 are temporarily retracted to the radial outer side through the gap between the lower surface of the lower plate 41 and the lower end of the notch 228. Consequently, the guide element 24 is positioned on the radial inner side of the upper outer wall 226 without interfering with the plurality of connecting wires 8.

[0066] As in Fig. As illustrated in Figure 6, projections 229, extending radially towards the inner side, are provided at three circumferential positions at a distance from each other on the upper end of the upper outer wall 226 of the insulator 22. On the other hand, a pair of regulating surfaces 234, opposing each other circumferentially, are provided at three circumferential positions at a distance from each other on the upper surface of the outer circumferential edge of the lower plate 41. When the guide element 24 is positioned in the insulator 22, the guide element 24 is moved axially towards the lower side, with each projection 229 aligned with the position of the notch 417 of the lower plate 41, and the guide element 24 is positioned on the radial inner side of the upper outer wall 226. At this point, a positional relationship between the projection 229 and the pair of regulating surfaces 234 is defined by a two-dot line. Fig. 10 is given. Fig. Figure 10 is a view illustrating the projection 229 and the pair of adjusting surfaces 234 during rotation, viewed from the radial inside. The guide element 24 is then rotated clockwise about the central axis 9. That is, when the guide element 24 is rotated in the direction of arrow Y2, the projection 229 is fitted between the pair of adjusting surfaces 234, as shown in Fig. 6 and Fig. Figure 10 illustrates the positional relationship between the overhang 229 and the pair of regulating surfaces 234. At this time, the relationship is represented by a continuous line in Fig. 10. Consequently, the relative movement in the circumferential direction of the overhang 229 is restricted by the pair of regulating surfaces 234.

[0067] Such an intervention between the projection 229 and the pair of regulating surfaces 234 is carried out at three positions in the circumferential direction. Consequently, the positional displacement of the guide element 24 in the circumferential direction with respect to the insulator 22 is prevented. As in Fig. As illustrated in Figure 10, the lower surface of the projection 229 faces the upper surface of the lower plate 41, while the latter touches the upper surface of the lower plate 41, or the lower surface of the projection 229 faces the upper surface of the lower plate 41 with a small gap between them. Consequently, upward displacement of the guide element 24 is prevented. An inclined surface 234a is located in the immediate vicinity of (the regulating surface 234 on the right side in Figure 10). Fig. 10) of the pair of regulating surfaces 234. The inclined surface 234a guides the projection 229 smoothly to the regulating surface 234 during the rotation of the guide element 24.

[0068] As described above, in the present embodiment, the guide element 24 is fixed to the insulator 22 by rotating the guide element 24 in a horizontal position. In this way, compared to the case where another fixing method, such as a snap connection, is used, the guide element 24 can be easily fixed, while its axial movement relative to the insulator 22 is suppressed. A projection can be provided on the lower plate 41 of the guide element 24, and a pair of regulating surfaces, which restrict movement in the circumferential direction of the projection, can be provided on the upper outer wall 226 of the insulator 22.

[0069] When the guide member 24 is fixed to the insulator 22, the U-phase common conductor 8uc, the V-phase common conductor 8vc, and the W-phase common conductor 8wc are bundled and welded together under the majority of connecting wires 8, which are withdrawn to the radial outside, to form the neutral point 80. They are then returned to the radial inside and pulled out of the notch 417. The U-phase common conductor 8uc, the V-phase common conductor 8vc, and the W-phase common conductor 8wc are wound around the inner wall 42. Since there are two neutral points 80, this process is repeated for each neutral point 80. As a result, the U-phase common line 8uc, the V-phase common line 8vc and the W-phase common line 8wc are arranged in the connecting wire receiving space 40 (step S6).

[0070] The winding direction of the connecting wire 8 at steps S6 and S9, which are described later, is preferably identical to the direction of rotation of the guide element 24 at step S5. In this way, even if the guide element 24 experiences circumferential force due to friction with the connecting wire 8, the higher regulating surface 234 (the other of the pair of regulating surfaces 234 on the left side in Fig. 10) to the overhang 229, which prevents the guide element 24 from easily detaching from the insulator 22.

[0071] Subsequently, the neutral point 80, which is provided at the leading ends of the U-phase common line 8uc, the V-phase common line 8vc and the W-phase common line 8wc, is fixed to a part of the guide element 24 (step S7). Fig. Figure 11 is a perspective view of the stator 2 at step S7. In the present embodiment, as in the enlarged view shown in Fig. As illustrated in Figure 11, the neutral point 80 is fixed to the inner wall 42 of the guide member 24 using the first fastening element 81, for example, a braid. However, instead of the braid, another element, for example, a clamping band, can be used as the first fastening element 81. If the first fastening element 81 is not used, the neutral point 80 can be fitted and fixed to a retaining section, for example, a slot, provided in the guide member 24. The first fastening element 81 can be eliminated if sufficient frictional force exists between the common conductors 8uc, 8vc, and 8wc of the respective phases and between sections of the terminal wire receiving space 40, by arranging the common conductors 8uc, 8vc, and 8wc of each phase in the terminal wire receiving space 40 without any gaps.

[0072] The neutral point 80 can be fixed to the lower plate 41 or the upper plate 43. The neutral point 80 can be fixed to the insulator 22.

[0073] The insulating tube 83 is then attached to the supply lines 8up, 8vp, and 8wp of the respective phases. The two U-phase supply lines 8up are bundled and welded to the connecting section 25a of the connection terminal 25. The other two V-phase supply lines 8vp and the two W-phase supply lines 8wp are also bundled and welded to the connection terminal 25. The supply lines 8up, 8vp, and 8wp of the respective phases are then connected to the three connection terminals 25 (step S8).

[0074] The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp, which have been retracted to the radial outside, return to the radial inside along with the connecting terminal 25 and are pulled out of the notch 417. The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are then wound around the inner wall 42. Consequently, the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are arranged in the connecting wire receiving space 40 (step S9).

[0075] The U-phase supply line 8up, the V-phase supply line 8vp and the W-phase supply line 8wp are then fixed to a part of the guide element 24 (step S10). Fig. Figure 12 is a perspective view of the stator 2 at step S10. In the present embodiment, as in the enlarged view shown in Fig. As illustrated in Figure 12, the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are fixed to the inner wall 42 of the guide element 24 using the second fastening element 82, for example, the braid. However, instead of the braid, another element, such as a clamp band, can be used as the second fastening element 82. If the second fastening element 82 is not used, the U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp are fitted and fixed to the retaining section, for example, a slot, provided in the guide element 24.The second fastening element 82 can be eliminated if sufficient frictional forces are present between the supply lines 8up, 8vp and 8wp and between sections of the connecting wire receiving space 40, by arranging the supply lines 8up, 8vp and 8wp in the connecting wire receiving space 40 without any gap.

[0076] The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp can be fixed to the lower plate 41 or the upper plate 43. The U-phase supply line 8up, the V-phase supply line 8vp, and the W-phase supply line 8wp can be fixed to the insulator 22.

[0077] Then, after the spacer 26 is positioned on the guide member 24, each connecting terminal 25 is temporarily placed through the through-hole 261 onto the projection 412 of the lower plate 41. The cover member 27 is then positioned on the guide member 25 to cover the connecting terminal 25 and secured using the screw 273a. The nut 273b is previously fixed to the nut retaining section 413 (step S11).

[0078] As described above, in motor 1 the lead wire of coil 23 is arranged directly on the guide element 24. Therefore, compared to the case where the connecting wire 8 is connected to a different connecting wire than the one on coil 23, no connection work is required, making assembly straightforward and minimizing concerns about connection failure. Furthermore, since the connecting wire receptacle 40 of the guide element 24 is curved, it is located in close proximity to the connecting wire 8, even if the connecting wires 8 are drawn from any section of the stator core 21, allowing for easy placement of the connecting wire 8. <5. Modifications>

[0079] Although the exemplary embodiment of the present invention is described above, the present invention is not limited to the above embodiment.

[0080] Fig. Figure 13 is a perspective view of a stator 2A according to a modification. In the example of Fig. 13 A guide element 24A is attached by snap-fit ​​connection to the upper surface of an upper outer wall 226A of an insulator 22A. Three receiving sections 414A are provided on the outer circumference of a lower plate 41A of the guide element 24A. The receiving section 414A includes a through-hole in the axial direction. On the other hand, three upwardly extending projections 226B are provided on the upper surface of the upper outer wall 226A of the insulator 22A. A claw 226C, extending to the radial outer side, is provided at the leading end of each projection 226B.

[0081] The three projections 226B are inserted into the three receiving sections 414A. The claw 226C of each projection 226B is hooked onto the upper surface of the receiving section 414A. Consequently, the lower surface of the claw 226C and the upper surface of the receiving section 414A face each other while touching in the axial direction, or the lower surface of the claw 226C and the upper surface of the receiving section 414A face each other in the axial direction with a small gap between them. The lower surface of the lower plate 41A touches the upper surface of the upper outer wall 226A. Consequently, the guide element 24A is fixed to the insulator 22A.In comparison to the above embodiment, this example is suitable for the insulator 22A and the guide element 24A in the case that a resin material which is readily elastically deformable can be used, or in the case that there is a loose size restriction in the axial direction of the stator 2A.

[0082] The extension direction of the claw 226C can be radial or circumferential. A projection encompassing a claw can be provided on the upper outer wall 226A of the insulator 22A, and a receiving section into which the projection is inserted can be provided on the lower plate 41A of the guide element 24A.

[0083] In the example of Fig.In this example, the hole 410A of the lower plate 41A is wide open in the circumferential direction. As in the comparison with the embodiment above, the guide element 24A is further separated from the coil 23 to ensure an insulating distance, allowing the hole 410A to be enlarged.

[0084] The radial inner surface of the lower plate 41A is inclined downwards towards the central axis 9. Consequently, the same effect can be obtained as with the groove 411 of the above embodiment.

[0085] In the above embodiment, the upper plate 43 is partially eliminated in the circumferential direction of the guide member 24. The connection housing is arranged in a portion of the circumferential direction. However, the upper plate 43 can be provided around the entire circumference, and the connection wire receiving space can be formed in an annular shape. In this configuration, the connection housing can be arranged on the upper side of the connection wire receiving space, or the connection can be drawn by another method.

[0086] In the above embodiment, the connection housing is attached to the guide element 24. Alternatively, the connection housing can be attached to the insulator. The connection housing can be attached to either the guide element 24 or the insulator 22.

[0087] In the above embodiment, the motor for the compressor is described. However, the stator and motor of the present invention can be used for applications other than the compressor. For example, the stator and motor of the present invention can be used for power steering in an automobile, an engine cooling fan, or an oil pump. The motor of the present invention can be installed in a household electrical appliance, an office automation instrument, a medical instrument, or the like to generate various types of driving force.

[0088] Features of the preferred embodiments described above and their modifications can be combined accordingly, as long as no conflict arises.

[0089] Although preferred embodiments of the present disclosure have been described above, it is understood that variations and modifications are obvious to those skilled in the field without deviating from the scope and nature of the present disclosure. The scope of the present disclosure is therefore determined exclusively by the following claims.

Claims

[1] A stator (2, 2A) having the following features: a stator core (21) comprising an annular core back (211) surrounding a vertically extending central axis (9) and a plurality of teeth (212) extending from the core back (211) to a radial inner surface; a plurality of coils (23) constructed with conductor wires wound around the teeth (212); an insulator (22, 22A) that insulates the stator core (21) from the coil (23); a plurality of connecting wires (8) extending upwards from the coil (23); and a guide element (24, 24A) that carries the connecting wire (8) on an upper side of the coil (23), wherein the guide element (24, 24A) is an insulating body comprising the following: a lower plate (41, 41A) which spreads out in a ring shape around the central axis (9); an inner wall (42) extending upwards from an inner perimeter of the lower plate (41, 41A); and an upper plate (43) extending from the inner wall (42) to a radial outer surface, a single connecting wire receiving space (40) is provided on an upper side of the lower plate (41, 41A), a lower side of the upper plate (43) and a radial outer side of the inner wall (42), and the majority of connecting wires (8) are arranged in a circumferential direction along the inner wall (42) in the connecting wire receiving space (40). [2] The stator (2, 2A) according to claim 1, wherein the majority of coils (23) includes the following: a U-phase coil (23u) to which a U-phase current is supplied; a V-phase coil (23V) to which a V-phase current is supplied; and a W-phase coil (23w) to which a W-phase current is supplied, the majority of connecting wires (8) includes the following: a U-phase common line (8uc) drawn from the U-phase coil (23u); a V-phase common line (8vc) drawn from the V-phase coil (23v); and a W-phase common line (8wc) drawn from the W-phase coil (23w), and a neutral point (80) which is a connecting section of the U-phase common line (8uc), the V-phase common line (8vc), and the W-phase common line (8wc), is located on the upper side of the lower plate (41, 41A). [3] The stator (2, 2A) according to claim 2, which further comprises a first fastening element (81) that fixes the neutral point (80) to a part of the guide element (24, 24A). [4] The stator (2, 2A) according to claim 1, which further comprises a second fastening element (82) that fixes each of a U-phase supply line (8up), a V-phase supply line (8vp) and a W-phase supply line (8wp) to a part of the guide element (24, 24A), where the majority of coils (23) includes the following: a U-phase coil (23u) to which a U-phase current is supplied; a V-phase coil (23V) to which a V-phase current is supplied; and a W-phase coil (23w) to which a W-phase current is supplied, and the majority of connecting wires (8) includes the following: the U-phase supply line (8up) that is pulled from the U-phase coil (23u); the V-phase supply line (8vp) that is drawn from the V-phase coil (23v); and the W-phase supply line (8wp) which is drawn from the W-phase coil (23w). [5] The stator (2, 2A) according to any one of claims 1 to 4, wherein the guide member (24, 24A) comprises a plurality of the upper plates (43) arranged radially with respect to the central axis (9). [6] The stator (2, 2A) according to any one of claims 1 to 5, which further comprises a plurality of connection terminals (25) which are supported by the guide element (24, 24A) so that they are connected to an external connection terminal which is provided separately from the motor, wherein at least a part of the plurality of connecting wires (8) is connected to the connection terminal (25). [7] The stator (2, 2A) according to claim 6, which further comprises a terminal housing for receiving the connection terminal (25) so that the connection terminal (25) can be connected to the external connection terminal in an axial direction, wherein the terminal housing is attached to the guide element (24, 24A) and / or the insulator (22, 22A). [8] The stator (2, 2A) according to claim 7, wherein the terminal housing is arranged in an annular region surrounded by an innermost diameter of the teeth (212) and an outermost diameter of the core back (211). [9] The stator (2, 2A) according to claim 7 or 8, wherein The connection housing includes the following: a housing base (26) which is arranged above at least a portion of the plurality of connecting wires (8); and a housing body (27) which forms a receiving space which accommodates the connecting port (25) together with the housing base (26), and the housing base (26) includes a receiving groove in which the connecting terminal (25) and the connecting wire (8) which is connected to the connecting terminal (25) are arranged in a predetermined section. [10] The stator (2, 2A) according to claim 9, wherein the connecting terminal (25) abuts the lower plate (41, 41A) and the housing body. [11] The stator (2, 2A) according to one of claims 7 to 10, which further comprises a fixing element that fixes the terminal housing to the guide element (24, 24A). [12] The stator (2) according to any one of claims 1 to 11, wherein the insulator (22) comprises the following: an insulating section (221) arranged between each of the teeth (212) and the coil (23); an annular section (224) that covers at least part of the upper surface of the nucleus ridge (211); and an outer wall (226) extending upwards from the ring-shaped section (224), the lower surface of the lower plate (41) is located below the upper surface of the outer wall (226), one of the lower plate (41) and the outer wall (226) includes an overhang (229) and the other of the lower plate (41) and the outer wall (226) comprises a pair of regulating surfaces (234) that restricts movement of the overhang (229) in the circumferential direction. [13] The stator (2) according to claim 12, wherein the overhang (229) is provided on the outer wall (226) so that it extends radially inwards, a pair of upwardly projecting projections (412) is provided separately from each other in the circumferential direction on the upper surface of the lower plate (41), and the pair of regulating surfaces (234) are opposite surfaces in the circumferential direction of the pair of projections (412). [14] The stator (2A) according to any one of claims 1 to 11, wherein The insulator (22A) includes the following: an insulating section (221) arranged between each of the teeth (212) and the coil (23); an annular section (224) that covers at least part of the upper surface of the nucleus ridge (211); and an outer wall (226A) extending upwards from the ring-shaped section (224), the lower surface of the lower plate (41A) touches the upper surface of the outer wall (226A), one of the lower plate (41A) and the outer wall (226A) includes a latch extending in the axial direction, and the other of the lower plate (41) and the outer wall (226A) has a receiving section (414A) which restricts movement of the latch in the axial direction. [15] The stator (2) according to any one of claims 9 to 11, wherein the outer wall (226) comprises a plurality of first notches (228) which extend downwards from an upper end and penetrate in the radial direction, and the lower end of the first notch (228) is located below the lower surface of the lower plate (41), so that the latter includes a space into which the connecting wire (8) can be inserted between the lower end and the lower surface of the lower plate (41). [16] The stator (2) according to claim 15, wherein a plurality of second notches (417), which extend radially inwards from the outer circumferential edge of the lower plate section and penetrate in the axial direction, are provided in a region of the lower plate (41), wherein the region of the first notch (228) is opposite in the radial direction, and the connecting wire (8) is pulled through the second notch (417). [17] The stator (2, 2A) according to any one of claims 1 to 16, wherein the lower plate (41, 41A) includes at least one hole (410, 410A) that penetrates in the axial direction, and the hole (410, 410A) and a space (212a) formed between the circumferentially adjacent teeth (212) overlap each other in the axial direction. [18] The stator (2, 2A) according to claim 17, wherein the upper plate (43) and the hole (410, 410A) overlap each other in the axial direction. [19] The stator (2, 2A) according to claim 18, wherein, when viewed in the axial direction, a region of the upper plate (43) is smaller than a region of the hole (410, 410A). [20] The stator (2, 2A) according to any one of claims 1 to 19, wherein a material for the guide element (24, 24A) is polyphenylene sulfide or a liquid crystal polymer. [21] The stator (2, 2A) according to any one of claims 1 to 20, wherein the stator (2, 2A) is used for a drive motor of an electric compressor. [22] An engine (1) having the following features: the stator (2, 2A) according to one of claims 1 to 21 and a rotor (3) which is arranged on a radial inner side of the stator (2, 2A). [23] An electric compressor (100) driven by the motor (1) according to claim 22.

Images