Stator, rotating electric machine, compressor, and refrigeration cycle device

Abstract

The stator includes: a plurality of divided stator cores which are connected to each other and arranged in a ring shape; a pair of insulators which are arranged as insulating members at both axial end surfaces of each of the plurality of divided stator cores; and an insulating film which is attached to a surface of the plurality of divided stator cores that forms a space, i.e., an insertion slot, between adjacent divided stator cores, so as to insulate a winding wound around each of the plurality of divided stator cores from the plurality of divided stator cores. Each of the plurality of divided stator cores has a core back portion which extends in a circumferential direction of the stator, and a tooth portion which protrudes from a central portion of the core back portion toward a center of the stator and in which the winding is wound. The insulating film is in contact with the core back portion and is arranged at each of the adjacent divided stator cores. Each end portion of the insulating film has a concave-convex portion whose concave-convex shape is identical to that of the other end portion. The end portion of the insulating film having the concave-convex portion is arranged in overlapping relation with the other insulating film.

Description

Technical Field

[0001] This disclosure relates to stators, rotating electric machines, compressors, and refrigeration cycle devices, and in particular to insulating films. Background Technology

[0002] As for the insulation method between the windings and the stator core of a concentrated-winding DC brushless motor for compressors, a known insulation method is based on thin-film insulation, which uses thin and inexpensive insulating films. The amount by which the insulation thickness is reduced increases the space available for arranging the windings within the stator core slots. For example, thicker wires can be used while ensuring the required number of wire turns. In other words, compared to a stator without a reduced insulation thickness, a stator with a thinner insulation thickness allows for the use of thicker wires in the windings, thus reducing winding resistance and achieving performance improvements due to reduced copper losses.

[0003] When thin-film insulation is applied to the stator, in order to arrange windings at the stator core ends in addition to the thin film, an insulating component made of an injection-molded material with a higher hardness than the thin film is usually used. In addition, in order to avoid interference with the winding machine during winding, it is necessary to pre-fix the thin film in the winding slot before the winding process. Therefore, a stator that enables the aforementioned insulating component to have the function of fixing the thin film has been proposed (for example, see Patent Document 1).

[0004] Patent Document 1: International Publication No. 2016 / 132420

[0005] However, in the stator of Patent Document 1, the thin film covering the space between adjacent split cores is longer than the distance between the teeth of the split cores during winding. The excess film floats up and intrudes into the winding track, and it's conceivable that the winding machine nozzle might entrain the film. Therefore, in the stator of Patent Document 1, the size of the insulating film needs to be strictly set to avoid excess insulation. However, if the film size is chosen to avoid excess insulation, when the split cores are closed on the ring after winding, the insulating film may get stuck in the connection part of the split cores, potentially causing a deterioration in stator shape or poor insulation. Summary of the Invention

[0006] This disclosure was made to solve the above-mentioned problems, and aims to provide a stator, rotary motor, compressor, and refrigeration cycle device capable of suppressing the winding of the insulating film and the jamming of the wound insulating film.

[0007] The stator disclosed herein, for use in a rotating electric motor, comprises: a plurality of segmented stator cores interconnected and arranged in a ring; a pair of insulators, which serve as insulating components, disposed on the axial end faces of each of the plurality of segmented stator cores; and an insulating film mounted on the face of the plurality of segmented stator cores forming slots that create spaces between adjacent segmented stator cores, thereby insulating a winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: a core back extending circumferentially along the stator; and teeth protruding from the center of the core back towards the center of the stator for winding. The insulating film contacts the core back and is disposed on adjacent segmented stator cores of the plurality of segmented stator cores. Each end of the insulating film has a protrusion with a concave-convex shape consistent with each other, and the end of the insulating film having the protrusion overlaps with the adjacent insulating film.

[0008] The rotary electric machine disclosed herein has: a stator with the structure described above; and a rotor disposed inside the stator, which rotates by means of magnetic action.

[0009] The compressor disclosed herein comprises: a rotary motor with the structure described above; a compression mechanism driven by the rotary motor to compress fluid drawn in from the outside; and a sealed container that houses the rotary motor and the compression mechanism.

[0010] The refrigeration cycle apparatus disclosed herein includes: a compressor with the above-described structure; an outdoor heat exchanger that exchanges heat between outdoor air and refrigerant flowing inside; a pressure reducing device that reduces the pressure of the refrigerant flowing inside; and an indoor heat exchanger that exchanges heat between indoor air and refrigerant flowing inside.

[0011] The stator, rotary motor, compressor, and refrigeration cycle device disclosed herein have an insulating film that contacts the back of the core and is disposed in adjacent segments of a plurality of segmented stator cores. Each end of the insulating film has a protrusion with a consistent shape. Furthermore, the end of the insulating film with the protrusion overlaps with an adjacent insulating film. By configuring the insulating film in this manner, it overlaps with the gap between adjacent segmented stator cores. Therefore, when the stator bends the segmented stator cores into a ring shape, it can prevent the insulating film from winding into the gap between adjacent segmented stator cores and prevent the wound insulating film from getting stuck in the gap. Attached Figure Description

[0012] Figure 1 This is a longitudinal sectional view of the compressor according to Embodiment 1.

[0013] Figure 2This is a simplified structural diagram of a refrigeration cycle device such as an air conditioner connected to the compressor of Embodiment 1.

[0014] Figure 3 This is a perspective view showing a portion of the stator used in the rotary motor of the compressor according to Embodiment 1.

[0015] Figure 4 This is a top view showing a portion of the stator used in the rotary motor of the compressor in Embodiment 1.

[0016] Figure 5 This is a schematic diagram illustrating the fixing claws of the stator insulator used in the rotary motor of the compressor in Embodiment 1.

[0017] Figure 6 yes Figure 5 A magnified view of part A.

[0018] Figure 7 This is a schematic diagram illustrating the fixing of the insulating film using the fixing claws of the compressor based on Embodiment 1.

[0019] Figure 8 This is a top view of the case where the multiple segmented stator cores constituting the stator of Embodiment 1 are arranged in a straight line.

[0020] Figure 9 Is Figure 8 The diagram shows a top view of a stator with multiple segmented stator cores, insulators, and windings.

[0021] Figure 10 It is a schematic representation Figure 9 A top view of the connecting part of the stator shown.

[0022] Figure 11 From Figure 10 The hollow arrow indicates the direction of observation of the stator in Embodiment 1.

[0023] Figure 12 This is a side view schematically showing the insulating film used in the stator of Embodiment 1.

[0024] Figure 13 This is a side view schematically showing another example of the insulating film used in the stator of Embodiment 1.

[0025] Figure 14 This is a schematic diagram illustrating the fracture surface of the insulating film used in the stator of Embodiment 1 after it has been cut.

[0026] Figure 15 This is a schematic diagram illustrating the winding process of the stator in the comparative example, showing the incorporation of the insulating film.

[0027] Figure 16This is a schematic diagram illustrating how the insulating film is inserted when the divided stator core of the comparative example is closed into a circular shape.

[0028] Figure 17 This is a schematic diagram showing the overlapping state of the insulating film of the stator in Embodiment 1.

[0029] Figure 18 This is an enlarged view of the slot portion of the stator in Embodiment 1, and is... Figure 17 An enlarged view of part A of the stator shown.

[0030] Figure 19 This is a schematic diagram illustrating the cutable portion of the insulating film using a top view and an inner diameter side view of the stator according to Embodiment 2.

[0031] Figure 20 This is a schematic diagram showing the overlapping state of the insulating film of the stator in Embodiment 2.

[0032] Figure 21 This is an enlarged view of the slot portion of the stator in Embodiment 2, and it shows... Figure 20 An enlarged view showing the relationship between the insulating film and the winding on one end side of part A.

[0033] Figure 22 This is an enlarged view of the slot portion of the stator in Embodiment 2, and it shows... Figure 20 An enlarged view showing the relationship between the insulating film and the winding on the other end side of section A.

[0034] Figure 23 This is a schematic diagram illustrating the cutable portion of the insulating film using a top view and an inner diameter side view of the stator according to Embodiment 3.

[0035] Figure 24 This is a side view schematically showing the insulating film used in the stator of Embodiment 3.

[0036] Figure 25 This is a top view showing the state in which the stator core of the stator in Embodiment 3 is equipped with insulators and windings.

[0037] Figure 26 It means Figure 25 An enlarged top view of section B of the stator shown.

[0038] Figure 27 This is a schematic diagram showing the insulating film of the stator in Embodiment 3.

[0039] Figure 28 This is an enlarged view of the slot portion of the stator in Embodiment 3, and is... Figure 27 An enlarged view of part A of the stator shown. Detailed Implementation

[0040] Hereinafter, the stator, rotary motor, compressor, and refrigeration cycle device of the embodiment will be described with reference to the accompanying drawings, etc. Furthermore, in the inclusion of... Figure 1 In the following figures, the relative dimensions and shapes of the constituent parts may differ from the actual figures. Furthermore, in the following figures, parts labeled with the same reference numerals are the same or equivalent parts, which is consistent throughout the specification. Additionally, terms indicating direction (e.g., "up," "down," "right," "left," "front," "back," etc.) are appropriately used for ease of understanding; however, these descriptions are for illustrative purposes only and do not limit the arrangement or orientation of the device or components.

[0041] Implementation method 1.

[0042] [Structure of Compressor 130]

[0043] Figure 1 This is a longitudinal sectional view of the compressor 130 according to Embodiment 1. (Usage) Figure 1 The compressor 130, which is a hermetic compressor, will be described. The compressor 130 draws in a low-temperature, low-pressure refrigerant, compresses the drawn-in refrigerant, and discharges a high-temperature, high-pressure refrigerant.

[0044] Compressor 130 is a single-cylinder rotary compressor, which is a fluid machine that discharges low-pressure gaseous refrigerant drawn into the compressor 130 as high-pressure gaseous refrigerant. In addition, the single-cylinder rotary compressor is just one example of compressor 130. As long as compressor 130 is a scroll or reciprocating type, etc., and the rotary motor 103 is arranged in a closed container 101, its compression structure is not limited.

[0045] The compressor 130 houses a compression mechanism 102 for compressing refrigerant and a rotary motor 103 for driving the compression mechanism 102 within a sealed container 101 consisting of an upper container 101a and a lower container 101b. The sealed container 101 forms the outer contour of the compressor 130. The compression mechanism 102 and the rotary motor 103 are connected by a crankshaft 104. The compression mechanism 102 is housed in the lower part of the sealed container 101, and the rotary motor 103 is housed in the upper part of the sealed container 101.

[0046] (Compression Mechanism Section 102)

[0047] The compression mechanism 102 is driven by the rotary motor 103 to compress the fluid drawn in from the outside. The compression mechanism 102 uses the rotational driving force supplied from the rotary motor 103 to compress the low-pressure gaseous refrigerant drawn into the low-pressure space of the sealed container 101 from the suction connection pipe 128 into a high-pressure gaseous refrigerant, and then discharges the compressed high-pressure gaseous refrigerant upwards from the compression mechanism 102.

[0048] The compression mechanism 102 has a hollow cylindrical cylinder 105. The compression mechanism 102 houses a rotary piston 109 that engages with the eccentric portion 104c of the crankshaft 104 within the cylinder 105. For the compression mechanism 102, one end of a blade (not shown) that reciprocates radially within a groove in the cylinder 105 abuts against the outer periphery of the rotary piston 109 and forms a compression chamber.

[0049] The openings at both ends of the cylinder 105 along the axial direction are closed by the upper bearing 106 and the lower bearing 107. In the compression mechanism 102, the space surrounded by the rotating piston 109, the cylinder 105, the vanes, the upper bearing 106 and the lower bearing 107 forms a compression chamber for compressing the low-pressure gaseous refrigerant drawn in from the suction connecting pipe 128.

[0050] A muffler 108 may also be provided on the upper surface of the upper bearing 106 to remove or reduce noise generated during the compression of the refrigerant in the compression mechanism 102. The muffler 108 has an opening 108a, which allows high-pressure gaseous refrigerant flowing in from the outlet (not shown) provided on the upper bearing 106 to be discharged into the interior of the sealed container 101.

[0051] (Rotary motor 103)

[0052] The rotary motor 103 is an electric motor disposed within the sealed container 101, used to move the compression mechanism 102. The rotary motor 103 uses electricity supplied from an external power source to generate rotational driving force on the crankshaft 104, and transmits this rotational driving force to the compression mechanism 102 via the crankshaft 104. The rotary motor 103 may be, for example, a brushless DC motor.

[0053] The rotary motor 103 includes: a stator 1, which has a hollow cylindrical shape when viewed from above; and a rotor 5, which is rotatably disposed on the inner side of the inner surface of the stator 1 and rotates by magnetic force. The stator 1 is formed by stacking stator core sheets formed from stamped thin sheet electromagnetic steel. The outer diameter of the core forming the stator 1 is larger than the inner diameter of the lower container 101b, and it is fixed to the inner wall of the lower container 101b by thermoforming.

[0054] To supply power from outside the sealed container 101, the conductor 9 of the stator 1 is connected to a glass terminal 119 disposed on the upper container 101a. The glass terminal 119 provides an interface for connection to an external power source. For the rotary motor 103, power supplied from the external power source is supplied via the conductor 9 to the wound coils constituting the stator 1, thereby causing the rotor 5 to rotate inside the stator 1.

[0055] Like the stator 1, the rotor 5 is formed by stacking rotor core sheets made of stamped thin sheet electromagnetic steel. The rotor 5 has: a rotor core 21, which has magnet insertion holes 22 and refrigerant flow paths 23; and an upper balance weight 25a and a lower balance weight 25b, which are respectively disposed at the two ends of the rotor core 21 in the axial direction, and also serve to prevent the permanent magnets 24 from scattering.

[0056] In the compressor 130, the upper balancing weight 25a is disposed at the upper end of the rotor core 21, and the lower balancing weight 25b is disposed at the lower end of the rotor core 21, thereby achieving balance between the rotor 5 and the crankshaft 104 and stabilizing the torque during motor drive. In addition to the upper balancing weight 25a and the lower balancing weight 25b, an end plate may also be provided on the rotor 5, which is configured to cover both axial ends of the rotor core 21.

[0057] In addition, the rotor 5 has rivets 26 for fixing the upper counterweight 25a, the lower counterweight 25b and the rotor core 21. The rivets 26 are inserted into rivet holes 26a formed through the rotor core 21, the upper counterweight 25a and the lower counterweight 25b.

[0058] The refrigerant flow path 23 formed in the rotor core 21 is used to guide the refrigerant gas discharged from the compression mechanism section 102 to the upper part of the sealed container 101, and to allow the refrigerant oil, which is guided to the upper part of the sealed container 101 along with the refrigerant gas, to flow down to the lower part of the sealed container 101. In addition, there is a space between the stator 1 and the sealed container 101 that connects the space above and below the compression mechanism section 102, and connects the upper space and the lower space inside the sealed container 101, and has the same function as the refrigerant flow path 23.

[0059] At the center of rotor 5, crankshaft 104 extends axially through rotor 5 and is fixed to rotor 5. Crankshaft 104 is a rotating shaft that transmits the rotational driving force of rotor 5 to compression mechanism 102. The inner diameter of rotor core 21 is smaller than the outer diameter of crankshaft 104, and rotor core 21 is fixed to rotating shaft 104a of crankshaft 104 by thermoforming.

[0060] The crankshaft 104 has an eccentric portion 104c, which is disposed inside the compression mechanism portion 102 at a position corresponding to the cylinder block 105. A generally cylindrical rotary piston 109, which is rotatably mounted along the outer surface of the eccentric portion 104c, is disposed on the outer periphery of the eccentric portion 104c. When the crankshaft 104 is rotated by the rotary motor 103, the rotary piston 109 rotates within the cylinder block 105 along its inner circumferential surface.

[0061] An intake muffler 127 is disposed on the outside of the sealed container 101. The intake muffler 127 functions as an accumulator for storing liquid refrigerant and as a muffler for reducing or eliminating noise generated by the incoming refrigerant. The intake muffler 127 is connected to the cylinder 105 of the compression mechanism section 102 via an intake connecting pipe 128.

[0062] The discharge pipe 129 passes through the upper container 101a and is fixed to the upper surface of the upper container 101a, which constitutes the sealed container 101. The discharge pipe 129 is a refrigerant pipe that discharges high-pressure gaseous refrigerant to the outside of the sealed container 101. The discharge pipe 129 is joined to the fixed part of the upper container 101a, for example, by brazing or resistance welding.

[0063] [Compressor 130's operation]

[0064] Next, the operation of the compressor 130 in this embodiment will be explained. When the crankshaft 104 is driven to rotate by the rotary motor 103, the eccentric portion 104c and the rotary piston 109 housed inside the cylinder 105 rotate eccentrically together with the crankshaft 104. Due to the eccentric rotation of the eccentric portion 104c and the rotary piston 109, the outer peripheral surface of the rotary piston 109 contacts and moves against the inner surface of the cylinder 105 within the hollow portion of the cylinder 105.

[0065] The eccentric rotation of the rotating piston 109 within the cylinder 105 is linked to the piston movement of the blades positioned inside the grooves formed in the cylinder 105. Low-pressure gaseous refrigerant flowing from the suction connecting pipe 128 into the compression mechanism section 102 flows into the sealed space, i.e., the compression chamber, surrounded by the rotating piston 109, cylinder 105, blades, upper bearing 106, and lower bearing 107. As the volume of the compression chamber decreases due to the eccentric rotation of the rotating piston 109, the low-pressure gaseous refrigerant flowing into the compression chamber is compressed into high-pressure gaseous refrigerant.

[0066] High-pressure gaseous refrigerant is discharged through the outlet provided on the upper bearing 106 into the hollow space inside the sealed container 101 outside the compression mechanism 102. The high-pressure gaseous refrigerant discharged into the hollow space inside the sealed container 101 is discharged to the outside of the sealed container 101 through the discharge pipe 129, for example, through the refrigerant flow path 23 and the gap between the stator 1 and the rotor 5 of the rotary motor 103. That is, the refrigerant gas compressed by the cylinder 105 is discharged into the sealed container 101 and sent to the refrigeration cycle device from the discharge pipe 129 by the rotary motor 103.

[0067] [Structure of Refrigeration Cycle Unit 200]

[0068] Figure 2 This is a simplified structural diagram of a refrigeration cycle device 200, such as an air conditioner, connected to the compressor 130 of Embodiment 1. The refrigeration cycle device 200 includes a compressor 130, a flow path switching device 133, an outdoor heat exchanger 134, a pressure reducing device 135, and an indoor heat exchanger 136. Additionally, the refrigeration cycle device 200 includes an intake silencer 127, which is connected to the intake side of the compressor 130. While the refrigeration cycle device 200 preferably includes the intake silencer 127, it may also be omitted.

[0069] The refrigeration cycle unit 200 connects the compressor 130, flow path switching device 133, outdoor heat exchanger 134, pressure reducing device 135, and indoor heat exchanger 136 via refrigerant piping to form a refrigerant circuit 201 for refrigerant circulation. The refrigerant flowing in the refrigerant circuit 201 may be, for example, R407C, R410A, or R32 refrigerant. Furthermore, in refrigeration cycle units 200 such as air conditioners, it is common for the indoor heat exchanger 136 to be installed indoors, while the compressor 130, flow path switching device 133, outdoor heat exchanger 134, and pressure reducing device 135 are installed outdoors.

[0070] The flow path switching device 133, for example a four-way valve, switches the flow direction of the refrigerant. The flow path switching device 133 is connected to the discharge side of the compressor 130. The outdoor heat exchanger 134 exchanges heat between outdoor air and the refrigerant flowing inside the outdoor heat exchanger 134. Depending on the refrigerant flow direction, the outdoor heat exchanger 134 functions as either a condenser or an evaporator. The pressure reducing device 135 reduces the pressure of the refrigerant flowing from the condenser into the pressure reducing device 135 and flowing inside the pressure reducing device 135.

[0071] The pressure reducing device 135 is, for example, an electronic expansion valve capable of adjusting the opening degree of the throttling valve, which controls the pressure of the refrigerant flowing into the outdoor heat exchanger 134 or the indoor heat exchanger 136 by adjusting the opening degree. The indoor heat exchanger 136 performs heat exchange between indoor air and the refrigerant flowing inside the indoor heat exchanger 136. Depending on the direction of refrigerant flow, the indoor heat exchanger 136 functions as either an evaporator or a condenser. Additionally, the refrigeration cycle unit 200 may also include an outdoor fan (not shown) supplying outdoor air to the outdoor heat exchanger 134, and an outdoor fan (not shown) supplying indoor air to the indoor heat exchanger 136.

[0072] [Operation of Refrigeration Cycle Unit 200]

[0073] The operation of the refrigeration cycle unit 200 when it is an air conditioner and the air conditioner is in heating mode will be explained. During the heating operation of the air conditioner, the flow path switching device 133... Figure 2 The solid line side forms a loop, and the piping connected to the flow path switching device 133 is connected to each other.

[0074] The high-temperature and high-pressure refrigerant, compressed by compressor 130, flows into indoor heat exchanger 136, where it condenses and liquefies. After exiting indoor heat exchanger 136, it flows into pressure reducing device 135, where it is throttled and becomes a low-temperature and low-pressure gas-liquid two-phase state. The refrigerant, throttled by pressure reducing device 135 and now in a low-temperature and low-pressure gas-liquid two-phase state, flows into outdoor heat exchanger 134, where it evaporates and vaporizes. After exiting outdoor heat exchanger 134, it passes through flow path switching device 133 and returns to compressor 130.

[0075] That is, when the refrigeration cycle unit 200 is an air conditioner, and the air conditioner is operating in heating mode, the refrigerant such as Figure 2 The solid arrow indicates that the refrigerant circulates in the refrigerant circuit 201. Through this refrigerant circulation, the outside air exchanges heat with the refrigerant in the outdoor heat exchanger 134, which serves as an evaporator. The refrigerant delivered to the outdoor heat exchanger 134 absorbs heat, and the heat-absorbing refrigerant is then delivered to the indoor heat exchanger 136, which serves as a condenser, to exchange heat with the indoor air and heat the indoor air.

[0076] The operation of the refrigeration cycle unit 200 when it is an air conditioner and the air conditioner is in cooling operation will be explained. During the cooling operation of the air conditioner, the flow path switching device 133 connects the piping connected to it to each other, so that... Figure 2 The dashed line side forms a loop.

[0077] The high-temperature and high-pressure refrigerant compressed by the compressor 130 flows into the outdoor heat exchanger 134, where it condenses and liquefies. After flowing out of the outdoor heat exchanger 134, it flows into the pressure reducing device 135, where it is throttled and becomes a low-temperature and low-pressure gas-liquid two-phase state. The refrigerant, now in a low-temperature and low-pressure gas-liquid two-phase state due to the pressure reducing device 135, flows into the indoor heat exchanger 136, where it evaporates and vaporizes. After flowing out of the indoor heat exchanger 136, it passes through the flow path switching device 133 and returns to the compressor 130.

[0078] That is, when the refrigeration cycle device 200 switches from heating operation to cooling operation, the indoor heat exchanger 136 changes from a condenser to an evaporator, and the outdoor heat exchanger 134 changes from an evaporator to a condenser. When the refrigeration cycle device 200 is an air conditioner and the air conditioner is operating in cooling mode, the refrigerant... Figure 2 The dashed arrow indicates that the refrigerant circulates in the refrigerant circuit 201. Through this refrigerant circulation, the indoor air exchanges heat with the refrigerant in the indoor heat exchanger 136, which acts as an evaporator, absorbing heat from the indoor air and thus cooling it. The refrigerant, after absorbing heat, is then transported to the outdoor heat exchanger 134, which acts as a condenser, to exchange heat with the outside air and dissipate heat to the outside air.

[0079] [Detailed structure of stator 1]

[0080] Figure 3 This is a perspective view showing a portion of the stator 1 used by the rotary motor 103 of the compressor 130 in Embodiment 1. Figure 4 This is a top view showing a portion of the stator 1 used by the rotary motor 103 of the compressor 130 in Embodiment 1. Additionally, in Figure 4 To illustrate the segmented stator core 2, illustrations of the insulator 300, insulating film 400, and winding 4 are omitted. Figure 3 and Figure 4 The stator 1 used in the rotary motor 103 will be described.

[0081] like Figure 4 , Figure 3 as well as Figure 1 As shown, the stator 1 has multiple segmented stator cores 2, insulators 300, insulating films 400, and windings 4. The segmented stator cores 2 form the core of the stator 1. The segmented stator cores 2 are formed to extend axially along the crankshaft 104. The segmented stator cores 2 are formed by stacking stator core sheets formed from stamped thin sheet electromagnetic steel plates.

[0082] Multiple segmented stator cores 2 are arranged adjacent to each other and connected to form a single unit. The multiple segmented stator cores 2 are arranged in a ring shape in the stator 1. The stator 1 is formed into a cylindrical shape by the multiple segmented stator cores 2 arranged circumferentially.

[0083] The segmented stator core 2 includes: a core back 2a extending circumferentially along the stator 1; a tooth 2b protruding from the center of the core back 2a toward the center of the stator 1; and a tooth front end 2c located at the front end of the tooth 2b. The segmented stator core 2 is roughly T-shaped when viewed from above.

[0084] The back of the iron core 2a forms the outer peripheral wall of the stator 1, creating a cylindrical peripheral wall within the stator 1. Adjacent segmented stator iron cores 2 are connected to each other by interlocking through the back of the iron core 2a.

[0085] The tooth 2b extends radially inward from the back of the core 2a toward the stator 1. When viewed from above, the circumferential width of the tooth 2b is smaller than the width of the back of the core 2a and smaller than the width of the tooth tip 2c. The winding 4 is wound around the tooth 2b via an insulator 300. Additionally, the winding 4 is wound around the tooth 2b via an insulating film 400.

[0086] The tooth tip 2c is formed at the front end of the tooth portion 2b such that it extends circumferentially along the stator 1 when viewed from above. When viewed from above, the circumferential width of the tooth tip 2c is greater than the width of the tooth portion 2b. The portion of the stator core 2 divided by the tooth portion 2b and the tooth tip 2c forms an inverted T-shape when viewed from above.

[0087] like Figure 4 As shown, the stator 1 has slots 301 formed between adjacent segmented stator cores 2. The slot 301 is a space formed by the side of the back 2a of the core, the tooth portion 2b, and the front end 2c of the tooth. For the stator 1, the winding 4 is disposed in the slot 301.

[0088] Insulator 300 is an insulating component used to insulate winding 4 from the split stator core 2. Insulator 300 is mounted on both axial end faces of the split stator core 2, covering both axial ends of the split stator core 2. A pair of insulators 300 cover both axial end faces of the split stator core 2. In the stator 1, winding 4 is wound around insulator 300.

[0089] like Figure 3As shown, the insulator 300, as an insulating component, has an upper wall portion 325, an inner wall portion 320, and a retaining claw 310. When the insulator 300 covers both axial ends of the segmented stator core 2, the upper wall portion 325 faces the axial end face of the core back surface 2a and covers the axial end face of the core back surface 2a. The inner wall portion 320 is formed along the outer edge of the upper wall portion 325.

[0090] The inner wall portion 320 is a wall portion extending axially along the stator 1. With the insulator 300 covering both ends of the segmented stator core 2 along its axial direction, the inner wall portion 320 faces and covers the side surfaces of the segmented stator core 2. The inner wall portion 320 is disposed in the slot 301, described later.

[0091] The inner wall portion 320 has a core back side wall portion 321 and a tooth side wall portion 322. When the insulator 300 is mounted on the segmented stator core 2, the core back side wall portion 321 faces and covers the side of the core back 2a. Similarly, when the insulator 300 is mounted on the segmented stator core 2, the tooth side wall portion 322 faces and covers the side of the tooth portion 2b. The insulator 300 has a retaining claw 310, but the detailed structure of the retaining claw 310 will be described later.

[0092] like Figure 3 As shown, the insulating film 400 is a thin-film insulating component. The material of the insulating film 400 is, for example, PET (polyethylene terephthalate) film, but it is not limited to PET film. The thickness of the insulating film 400 is, for example, 0.1 mm to 0.2 mm, but it is not limited to this thickness. To bend the insulating film 400, it is necessary to intentionally create creases in it. The insulating film 400 will not be bent unless creases are intentionally created. To create creases in the insulating film 400, for example, a high-temperature, knife-like clamp can be used.

[0093] The insulating film 400 is installed in slots 301 (see reference) of multiple segmented stator cores 2, forming spaces between adjacent segmented stator cores 2. Figure 4 The insulating film 400 is arranged in the slot 301 so that the winding 4 wound on each of the multiple segmented stator cores 2 is insulated from the multiple segmented stator cores 2. The insulating film 400 is disposed in the slot 301 so as to face the side of the back 2a, the tooth portion 2b, and the tooth front end 2c of the core. The insulating film 400 insulates the winding 4 from the segmented stator cores 2 and insulates adjacent multiple segmented stator cores 2 from each other. Details about the insulating film 400 will be described later.

[0094] Figure 1The winding 4 shown is an electrical wire. The stator 1 generates a rotating magnetic field by the flow of current through the winding 4. As described above, the winding 4 is wound around the split stator core 2 via the insulator 300 and the insulating film 400.

[0095] Figure 5 This is a schematic diagram illustrating the fixing claw 310 of the insulator 300 of the stator 1 used in the rotary motor 103 of the compressor 130 of Embodiment 1. Figure 6 yes Figure 5 A magnified view of part A. Figure 7 This is a schematic diagram illustrating the fixing claw 310 of the compressor 130 in Embodiment 1 fixing the insulating film 400. Additionally, Figure 7 It will be discussed later. Figure 9 A schematic diagram showing the location of the EE line cross-section. Additionally, Figure 6 The figure shows the fixing claw 310 on the upper end side of the fixing insulating film 400. Figure 7 The diagram shows the retaining claw 310 on the lower end side of the retaining insulating film 400. (Using...) Figures 5-7 The retaining claws of insulator 300 are described.

[0096] like Figures 5-7 As shown, a fixing claw 310 is provided at the corner formed by the back sidewall portion 321 and the tooth sidewall portion 322 of the core. The fixing claw 310 is positioned at the root portion of the tooth portion 2b, at the intersection of the back sidewall portion 2a and the tooth portion 2b, when the insulator 300 is installed on the segmented stator core 2. The fixing claw 310 fixes the insulating film 400.

[0097] The insulating film 400 is fixed to the stator 1 by the retaining claw 310. Therefore, when the adjacent segmented stator cores 2 are rotated around the connecting portion 51 described later, the retaining claw 310 guides the insulating film 400 to introduce the insulating film 400 into the outer diameter side and the center side of the tooth portion 2b of the stator 1. Before or after the winding 4 is wound onto the tooth portion 2b, the stator 1 can cut the cutable portion 400b of the insulating film 400 (see reference 1) by applying a tensile force to the insulating film 400. Figure 12 ).

[0098] like Figure 3 and Figure 7 As shown, the insulator 300 has a concave portion 313. The concave portion 313 is formed on the opposing surface 312 and is formed in a recessed shape on the opposing surface 312. The concave portion 313 is formed by a retaining claw 310 and an inner wall portion 320. In addition, the opposing surface 312 is formed by the retaining claw 310.

[0099] The opposing surface 312 is the surface on which one of the pair of insulators 300 at both ends of the stator core 2, which are mounted axially on the stator 1, faces each other. The recessed portion 313 is located inside the stator 1, surrounded by the core back 2a and the toothed portion 2b, and opens into the slot 301 of the stator 1. The upper or lower end of the insulating film 400 is disposed in the recessed portion 313. The recessed portion 313 restricts the direction of movement and guides the insulating film 400 when it is moved.

[0100] The concave portion 313 has a bottom portion 310a. The bottom portion 310a is the bottom part of the concave portion 313. Here, in the split stator core 2, the sidewall of the portion opposite the insulating film 400 between the insulators 300 mounted at both ends is designated as the sidewall portion 2d. The bottom portion 310a is formed to be located on the inner side of the split stator core 2, closer to the sidewall portion 2d. The fixing claw 310 has an inclined portion 310b. The inclined portion 310b is formed at a position opposite to the inner wall portion 320. The inclined portion 310b is inclined such that the width between it and the inner wall portion 320 decreases from the front end side of the fixing claw 310 toward the root side. At least a portion of the inclined portion 310b is formed to be located on the inner side of the split stator core 2, closer to the sidewall portion 2d. Since the insulator 300 has the inclined portion 310b of the fixing claw 310 and the bottom portion 310a, the insulating film 400 deforms toward the inner side of the split stator core 2 and inserts into that inner side.

[0101] Figure 8 This is a top view of the case where the multiple segmented stator cores 2 constituting the stator 1 of Embodiment 1 are arranged in a straight line. Figure 8 This represents a local plane of stator 1 when the winding 4 is wound around the segmented stator core 2. (Using...) Figure 4 and Figure 8 The construction of stator 1 will be further explained.

[0102] When viewing the stator 1 from the inner diameter side, the core back 2a located on the left of the two adjacent core backs 2a is called the left core back 2a1, and the core back 2a located on the right is called the right core back 2a2. Furthermore, the tooth 2b protruding from the left core back 2a1 is called the left tooth 2b1, and the tooth 2b protruding from the right core back 2a2 is called the right tooth 2b2. Additionally, the tooth tip 2c located at the front end of the left tooth 2b1 is called the left tooth tip 2c1, and the tooth tip 2c located at the front end of the right tooth 2b2 is called the right tooth tip 2c2.

[0103] With multiple segmented stator cores 2 arranged in a ring shape, the connection between the back side 2a1 of the left core and the back side 2a2 of the right core is used as the connection part 51. For example... Figure 4As shown, the slot 301 is formed by the back of the left iron core 2a1, the left tooth 2b1, the front end of the left tooth 2c1, the back of the right iron core 2a2, the right tooth 2b2, and the front end of the right tooth 2c2.

[0104] More specifically, the sidewall of the segmented stator core 2 forming the slot 301 has a left core back side 2a11, a left tooth side 2b11, a left front side 2c11, a right core back side 2a21, a right tooth side 2b21, and a right front side 2c21.

[0105] The left back side surface 2a11 is the sidewall of the left back side surface 2a1, and also the inner circumferential wall of the back side surface 2a. The left back side surface 2a11 faces the center of the stator 1. The left tooth side surface 2b11 is the sidewall of the left tooth portion 2b1, and also faces the adjacent right tooth portion 2b2 in the circumferential direction of the stator 1. The left front side surface 2c11 is the sidewall of the front end of the left tooth 2c1, and also faces the outer direction of the stator 1. The left front side surface 2c11 faces the left back side surface 2a11.

[0106] The right back side surface 2a21 is the sidewall of the right back side surface 2a2 and the inner circumferential wall of the back side surface 2a. The right back side surface 2a21 faces the center of the stator 1. The right tooth side surface 2b21 is the sidewall of the right tooth portion 2b2 and faces the side of the adjacent left tooth portion 2b1 in the circumferential direction of the stator 1. The right front side surface 2c21 is the sidewall of the front end portion 2c2 of the right tooth and faces the outer direction of the stator 1. The right front side surface 2c21 faces the right back side surface 2a21.

[0107] Here, as Figure 4 As shown, in the slot 301 formed by the left iron core back 2a1 and the right iron core back 2a2, the length of the left iron core back 2a1 forming the slot 301 in the circumferential direction of the stator 1 is defined as the left iron core back length A [mm]. When the stator 1 is viewed from above, the left iron core back length A is the length of the left iron core back side 2a11.

[0108] Furthermore, in the slot 301 formed by the left iron core back 2a1 and the right iron core back 2a2, the length of the right iron core back 2a2 forming the slot 301 in the circumferential direction of the stator 1 is defined as the right iron core back length B [mm]. When the stator 1 is viewed from above, the right iron core back length B is the length of the right iron core back side 2a21.

[0109] like Figure 8As shown, in the stator 1 when the winding 4 is wound around the segmented stator core 2, the distance between the left side surface 2a11 and the right side surface 2a21 of the back of two adjacent cores is defined as the distance C [mm] between the endpoints of the back of the cores. The distance C between the endpoints of the back of the cores is the distance between the left connecting end 2a13 of the left back of the core 2a1 and the right connecting end 2a23 of the right back of the core 2a2, and is the length of the gap formed between the left back of the core 2a1 and the right back of the core 2a2.

[0110] The left connecting end 2a13 is the end on the connecting portion 51 side of the left iron core back side 2a11, and it is the portion that abuts against the right connecting end 2a23 of the right iron core back 2a2 when the multiple segmented stator iron cores 2 are arranged in a circular shape to form a slot 301. The right connecting end 2a23 is the end on the connecting portion 51 side of the right iron core back side 2a21, and it is the portion that abuts against the left connecting end 2a13 of the left iron core back 2a1 when the multiple segmented stator iron cores 2 are arranged in a circular shape to form a slot 301.

[0111] like Figure 8 As shown, in the stator 1 when the winding 4 is wound around the segmented stator core 2, the length of the insulating film 400 disposed between two adjacent teeth 2b D1 in front of the slot 301 is defined as the circumferential length D [mm] of the insulating film (refer to...). Figure 12 That is, the circumferential length D of the insulating film is the length of the insulating film 400 disposed between the left tooth surface 2b11 of the left tooth portion 2b1 and the right tooth surface 2b21 of the right tooth portion 2b2. The circumferential length D of the insulating film is the length of the insulating film 400 at the root portion of the left tooth portion 2b1 and the right tooth surface 2b21 of the right tooth portion 2b2. Furthermore, the insulating film 400 is flexibly disposed between the left tooth surface 2b11 of the left tooth portion 2b1 and the right tooth surface 2b21 of the right tooth portion 2b2. The circumferential length D of the insulating film is the length of the insulating film 400 when the flexed portion is extended.

[0112] The circumferential length D of the insulating film is formed to be greater than the length obtained by adding the length A of the left iron core back, the length B of the right iron core back, and the distance C between the endpoints of the iron core back. In addition, the circumferential length D of the insulating film is formed to be less than twice the length obtained by adding the length A of the left iron core back, the length B of the right iron core back, and the distance C between the endpoints of the iron core back.

[0113] That is, the stator 1 is formed to satisfy the formula: left core back length A + right core back length B + distance between the ends of the core back C < insulating film circumferential length D < 2 × (left core back length A + right core back length B + distance between the ends of the core back C). The insulating film 400 has a portion formed as the circumferential length D between two adjacent teeth 2b of the stator 1 when the winding 4 is wound around the segmented stator core 2.

[0114] The stator 1 is formed to satisfy the relationship that the circumferential length D of the insulating film is less than 2 × (length A of the back of the left iron core + length B of the back of the right iron core + distance C between the endpoints of the back of the iron core). That is, the circumferential length D of the insulating film is shorter than twice the length obtained by adding the length A of the back of the left iron core, the length B of the back of the right iron core, and the distance C between the endpoints of the back of the iron core.

[0115] Figure 9 Is Figure 8 The diagram shows a top view of a stator 1 with multiple segmented stator cores 2, insulators 300, and windings 4. Figure 10 It is a schematic representation Figure 9 A top view of the connecting part 51 of the stator 1 shown. Figure 11 From Figure 10 The hollow arrow points in the direction of the side view of the stator 1 in Embodiment 1.

[0116] Here, as Figure 10 and Figure 11 As shown, the distance from the winding terminal 4g to the core terminal is defined as the end length a [mm]. The winding terminal 4g is the winding 4 wound around the tooth 2b, and is the part of the winding 4 located at the position furthest from the tooth 2b that contacts the insulating film 400 opposite to the right core back side 2a21 or the left core back side 2a11. The core terminal is the left connecting side end 2a13 or the right connecting side end 2a23, and is the part in the slot 301 that contacts the core back 2a of the adjacent segmented stator core 2.

[0117] Furthermore, the gap between adjacent segmented stator cores 2 of stator 1 when the winding 4 is wound around the segmented stator core 2 is defined as gap distance b [mm]. Gap distance b is the distance between the left connecting end 2a13 of the left core back 2a1 and the right connecting end 2a23 of the right core back 2a2, and is the same distance as the distance C between the endpoints of the core backs. When viewed radially along stator 1, the distance from the center of the connecting portion 51 connecting adjacent segmented stator cores 2 to the cuttable portion 400b is defined as the cutting distance c [mm]. In this case, the position of the cuttable portion 400b is the position of the cuttable portion 400b after stretching the insulating film 400 as described later and cutting it at the cuttable portion 400b. The center of the connecting portion 51 is located at the center of the gap between the segmented stator cores 2 in the circumferential direction of stator 1.

[0118] Figure 12 This is a side view schematically showing the insulating film 400 used in the stator 1 of Embodiment 1. Figure 13 This is a side view schematically showing another example of the insulating film 400 used in the stator 1 of Embodiment 1. Before being cut, a piece of insulating film 400 has a cutable portion 400b in the winding posture of the stator 1 with the winding 4 wound around the segmented stator core 2. The cutable portion 400b is a portion of the insulating film 400 that has been processed to be easy to cut.

[0119] The cutable portion 400b is formed as a line at the upper and lower ends of the insulating film 400. The cutable portion 400b is formed on the insulating film 400 in a manner extending along the axial direction of the stator 1. Furthermore, in Figure 12 In the middle, a cutable portion 400b is formed on the left side relative to the center of the insulating film 400. Figure 13 In the insulating film 400, a cutable portion 400b is formed on the right side relative to the center. The insulating film 400 may have a cutable portion 400b on either the left or right side relative to the center. That is, the insulating film 400 may have a cutable portion 400b corresponding to either the left back side 2a1 or the right back side 2a2 of the iron core.

[0120] like Figure 12As shown, the cutable portion 400b has a cutting portion 400b1 where the insulating film 400 is broken and a connecting portion 400b2 where the insulating film 400 is not broken. The cutable portion 400b1 and the connecting portion 400b2 are alternately formed in the axial direction of the stator 1. The insulating film 400 can be cut by cutting the cutable portion 400b, that is, by breaking the connecting portion 400b2. Therefore, the insulating films 400 respectively disposed in adjacent segmented stator cores 2 are formed from a single insulating film 400. In the initial arrangement, the insulating film 400 is a single piece, but it is divided into two pieces by being cut at the cutable portion 400b, and the divided insulating films 400 are respectively disposed in adjacent segmented stator cores 2.

[0121] like Figure 12 As shown, the insulating film 400 has engaging portions 400e. The engaging portions 400e are the parts that engage with the fixing claws 310 of the insulator 300 when the insulating film 400 is mounted on the stator 1. In a direction perpendicular to the axial direction of the stator 1, the insulating film 400 has two engaging portions 400e at its upper end. The length between the two engaging portions 400e at the upper end is the circumferential length D [mm] of the insulating film. Furthermore, in a direction perpendicular to the axial direction of the stator 1, the insulating film 400 has two engaging portions 400e at its lower end. The length between the two engaging portions 400e at the lower end is the circumferential length D [mm] of the insulating film. Additionally, as... Figure 10 As shown, the thickness of the insulating film 400 is set as thickness f [mm]. Additionally, as... Figure 1 and Figure 12 As shown, the axial length of the insulating film 400 in the stator 1 is defined as the axial length h [mm]. Additionally, as... Figure 12 As shown, the length of the cut-off portion 400b1 in the axial direction of the stator 1 is set as the cut-off length d [mm]. Additionally, the length of the connecting portion 400b2 in the axial direction of the stator 1 is set as the connecting length e [mm].

[0122] The insulating film 400 has a cutable portion 400b at a position where the cutting distance c is greater than half the gap distance b. That is, the insulating film 400 has a cutable portion 400b formed on a line that satisfies the formula that the cutting distance c > the gap distance b / 2. When the stator 1 satisfies the relationship that the cutting distance c > the gap distance b / 2, the position of the cutable portion 400b can be between the left connecting end 2a13 and the left tooth surface 2b11 of the left core back 2a1 of the stator core 2. Alternatively, when the stator 1 satisfies the relationship that the cutting distance c > the gap distance b / 2, the position of the cutable portion 400b can be between the right connecting end 2a23 and the right tooth surface 2b21 of the right core back 2a2 of the stator core 2.

[0123] The insulating film 400 has a cutable portion 400b at a position where the distance obtained by adding half the distance of the end length a and the gap distance b, minus the cutting distance c, plus the thickness f, i.e., the creepage distance ms, is greater than the minimum creepage distance preset in the JIS standard. In other words, the insulating film 400 has a cutable portion 400b formed on a line satisfying the formula: end length a + gap distance b / 2 - cutting distance c + thickness f > preset minimum creepage distance. The creepage distance ms is the shortest distance along the surface of the insulating film 400 from the winding terminal portion 4g to the back of the core 2a when the stator 1 is viewed along its axial direction.

[0124] The cutable portion 400b of the insulating film 400 is formed such that the connection length e is less than the cutting length d. That is, the cutable portion 400b is formed to satisfy the formula that the connection length e < the cutting length d.

[0125] Furthermore, the insulating film 400 is formed such that the length obtained by dividing the axial length h by the sum of the connection length e and the cutting length d is 2 [mm] or more. That is, the cutable portion 400b is formed to satisfy the formula that axial length h / (connection length e + cutting length d) ≥ 2 [mm].

[0126] Next, use Figure 9 The state of the winding posture of the stator 1 shown is used to explain the cutting of the insulating film 400. Figure 9 The stator 1 shown represents the winding posture of the stator 1 in which the nine segmented stator cores 2 are arranged in a circular ring, with adjacent segmented stator cores 2 rotated 40° around the connecting part 51. Furthermore, the number of segmented stator cores 2 is not limited to nine.

[0127] Before or after winding the winding 4 onto the tooth 2b, when rotating the segmented stator core 2 around the connecting portion 51, the cutable portion 400b of the insulating film 400 is cut using the tensile force of the segmented stator core 2 in the rotational direction. For example, if the segmented stator core 2 is rotated around the connecting portion 51 to widen the gap between the left tooth 2b1 and the right tooth 2b2, the tensile force acts on the insulating film 400. That is, if the segmented stator core 2 is rotated around the connecting portion 51 to widen the angle between the left tooth 2b1 and the right tooth 2b2, the tensile force acts on the insulating film 400.

[0128] At this time, after the winding 4 is wound onto the tooth 2b, the movement of the insulating film 400 is suppressed by fixing the insulating film 400 to the winding 4 and fixing the insulating film 400 to the fixing claw 310 of the insulator 300. Therefore, as described above, when the split stator core 2 is rotated, the insulating film 400 is fixed by fixing the insulating film 400 to the winding 4 and supporting the insulating film 400 to the fixing claw 310, and the insulating film 400 is stretched in the rotation direction of the left and right teeth 2b. In addition, the restoring force of the stretched insulating film 400 to recover acts on the fixing part of the insulating film 400 and the supporting part of the insulating film 400 to the fixing claw 310, and the fixing part and the supporting part resist the restoring force.

[0129] On the other hand, before winding the winding 4 onto the tooth 2b, the insulating film 400 is fixed by the retaining claw 310 of the insulator 300, thus suppressing the movement of the insulating film 400. Therefore, as described above, when the segmented stator core 2 is rotated, the insulating film 400 is fixed by the support of the retaining claw 310, and the insulating film 400 is stretched along the rotation direction of the left and right teeth 2b. In addition, the restoring force of the stretched insulating film 400 acts on the supporting portion of the retaining claw 310 against the restoring force.

[0130] Figure 14 This is a schematic diagram illustrating the fracture surface of the insulating film 400 used in the stator 1 of Embodiment 1 after it has been cut. Figure 14 As shown, for the fracture surface of the cut insulating film 400, when the ends 302 of the two cut insulating films 400 are aligned with each other, the protrusions 303 are aligned. In the slot 301, the ends 302 of adjacent insulating films 400 in the overlapping state have protrusions 303 with the protrusions 303 of the ends 302 being aligned with each other, so that they can fit together respectively. The ends 302 of the insulating film 400 are formed by being cut at the cutable portion 400b. The protrusions 303 are formed at the connecting portion 400b2 (see reference). Figure 12 ).

[0131] The insulating film 400 contacts the back side 2a of the iron core. Adjacent segmented stator cores 2 in a plurality of segmented stator cores 2 are respectively disposed at their ends 302, and each end 302 has a concave-convex portion 303 with the same concave-convex shape as the end of the insulating film 400 having the concave-convex portion 303, which overlaps with another adjacent insulating film 400.

[0132] Figure 15 This is a schematic diagram illustrating the winding of the insulating film 400L in the winding process of the stator 1L of the comparative example. Figure 16This is a schematic diagram illustrating the insertion of the insulating film 400L when the divided stator core 2 is closed into a circular shape in the stator 1L of the comparative example. Figure 15 and Figure 16 The stator 1L of the comparative example, which does not use the insulator 300 and insulating film 400 of Embodiment 1, will be described.

[0133] By increasing the effective cross-sectional area of ​​the windings in the stator of the rotary motor used in the compressor, copper losses and performance can be improved. Effective methods for increasing the effective cross-sectional area of ​​the windings include reducing the amount of insulating components in the slots used for insulation between the windings and the stator core, or using a segmented stator core to reduce unused space during winding. On the other hand, when using these two methods, such as... Figure 15 As with the stator 1L in the comparative example, during the winding process, there is a risk that the flexed insulating film 400L may intrude into the winding area 401, and that the insulating film 400L may interfere with the winding equipment. Additionally, as... Figure 16 As with the stator 1L in the comparative example, when the segmented stator core 402 is deformed into a ring shape, there is a risk that the flexed insulating film 400L may get stuck in the gap of the segmented stator core 402, which may have an adverse effect on the shape of the stator 1.

[0134] [The function and effect of stator 1]

[0135] Figure 17 This is a schematic diagram showing the overlapping state of the insulating film 400 of the stator 1 in Embodiment 1. Figure 18 This is an enlarged view of the slot 301 portion of the stator 1 in Embodiment 1, and is... Figure 17 An enlarged view of part A of the stator 1 shown. The insulating film 400 contacts the back side 2a of the iron core in the slot 301, and is respectively disposed in adjacent segmented stator iron cores 2, with adjacent insulating films 400 overlapping each other.

[0136] The insulating film 400 contacts the back side 2a of the iron core. Adjacent segmented stator cores 2, each of which is disposed in a plurality of segmented stator cores 2, have a protrusion 303 at each end 302 with a consistent shape. Furthermore, the insulating film 400 is configured such that the end 302 of the insulating film 400 with the protrusion 303 overlaps with another adjacent insulating film 400. By configuring the insulating film 400 in this manner, it overlaps with the gap between adjacent segmented stator cores 2. Therefore, when the stator 1 bends the segmented stator cores 2 into a ring shape, it can prevent the insulating film 400 from winding into the gap between adjacent segmented stator cores 2, and prevent the wound insulating film 400 from being caught in that gap.

[0137] The stator 1 is configured with a film length that prevents the insulating film 400 from bending during the winding posture. This structure prevents the insulating film 400 from winding. However, it is not possible to manufacture the insulating film 400 completely without bending, resulting in some bending. When the insulating film is made of a single sheet without a cutable portion 400b—that is, when the insulating film used for adjacent segmented stator cores 2 is made of an uncut sheet—the following situation may occur: When using such an insulating film, after the stator 1 is wound, when the stator 1 is deformed into a ring shape, the insulating film may bend towards the gap between adjacent segmented stator cores 2. Furthermore, when the insulating film bends towards the gap, it may sometimes become stuck between adjacent segmented stator cores 2.

[0138] In Embodiment 1, the stator 1, when in the winding posture, has a cutable portion 400b at a position where the insulating film 400 coincides with the gap between the segmented stator cores 2. Before the stator 1 is bent into a ring shape, the insulating film 400 is cut at the cutable portion 400b. Because the end 302 of the cut insulating film 400 is open, the stator 1 does not flex at the cut point. Therefore, the stator 1 does not have the possibility of flexing in the insulating film 400 when the stator 1 is bent into a ring shape, thus preventing the insulating film 400 from getting stuck in the gap between adjacent segmented stator cores 2.

[0139] For stator 1, the insulating film 400 contacts the back side 2a of the iron core in slot 301, and is respectively disposed in adjacent segmented stator iron cores 2, with adjacent insulating films 400 overlapping each other. By disposing the insulating film 400 in the above-described state, the insulating film 400 overlaps with the gap between adjacent segmented stator iron cores 2. Therefore, when the stator 1 is bent into a ring shape by the segmented stator iron cores 2, the insulating film 400 can be prevented from being rolled into the gap between adjacent segmented stator iron cores 2, and the wound insulating film 400 can be stuck into the gap.

[0140] For the stator 1, in the slot 301, the ends 302 of the adjacent insulating films 400 in the overlapping state have concave and convex portions 303 with the same concave and convex shape as the ends 302, so as to fit together respectively. The insulating film 400 can have concave and convex portions 303 with the same concave and convex shape as the ends 302, so as to fit together respectively, by stretching and cutting a piece of insulating film 400.

[0141] The insulating film 400 has a cutable portion 400b, and the end 302 of the insulating film 400 is formed by being broken at the cutable portion 400b. The insulating film 400 has a cutable portion 400b, thereby the insulating film 400 can be easily cut at the desired location.

[0142] The stator 1 is formed to satisfy the relationship that the cutting distance c > the gap distance b / 2. When the stator 1 satisfies the relationship that the cutting distance c > the gap distance b / 2, the cutting position of the insulating film 400 formed by the cuttable part 400b can exist on the back side 2a of the core, rather than in the gap between adjacent split stator cores 2.

[0143] The stator 1 is configured to satisfy the formula that the end length a + gap distance b / 2 - cutting distance c + thickness f > a preset minimum creepage distance. Therefore, after the stator 1 cuts the insulating film 400 at the cutable portion 400b, the creepage distance ms derived from the end length a + gap distance b / 2 - cutting distance c + thickness f can ensure the minimum creepage distance.

[0144] The stator 1 is formed into a cutable portion 400b of the insulating film 400, which satisfies the formula that the connection length e < the cutting length d. Therefore, the insulating film 400 can be easily cut at the cutable portion 400b by a tensile force in the direction perpendicular to the cutable portion 400b.

[0145] The stator 1 is formed such that the cutable portion 400b of the insulating film 400 satisfies the formula that axial length h / (connection length e + cutting length d) ≥ 2. By satisfying this formula, the insulating film 400 has at least two sets of cutting portions 400b1 (the portion of the insulating film 400 to be cut) and connecting portions 400b2 (the portion of the insulating film 400 not to be cut) provided in the cutable portion 400b. Therefore, the insulating film 400 is less prone to deformation before cutting the cutable portion 400b, and its shape is easily maintained.

[0146] The stator 1 is formed to satisfy the relationship that the length A of the left iron core back side + the length B of the right iron core back side + the distance C between the endpoints of the iron core back side < the circumferential length D of the insulating film. That is, the circumferential length D of the insulating film is longer than the length obtained by adding the lengths A, B, and C of the left iron core back side when the stator 1 is in its winding posture. Therefore, the stator 1 is longer than the length obtained by adding the lengths A, B, and C of the left iron core back side when the stator 1 is in its winding posture. Figure 4 The stator core 2 shown is configured in a circular shape. Figure 8 The state shown ensures that the rotation of adjacent segmented stator cores 2 centered on the connecting part 51 is not hindered by the force generated by the insulating film 400 when the winding posture of the stator 1 is maintained.

[0147] The stator 1 is configured to satisfy the relationship that the circumferential length D of the insulating film is less than 2 × (length A of the left core back + length B of the right core back + distance C between the endpoints of the core back). That is, the circumferential length D of the insulating film is shorter than twice the length obtained by adding the lengths A, B, and C of the left core back, and the distance C between the endpoints of the core back. Therefore, the amount of deflection of the insulating film 400 towards the center of the stator 1 in an arc direction during the winding posture can be suppressed. When the insulating film 400 and the insulator 300 are also assembled to the split stator core 2, it is easy to mount the insulating film 400 to the fixing claw 310 (described later). Furthermore, the stator 1 is configured with a film length that prevents the insulating film 400 from deflecting during the winding posture. With this structure, the stator 1 can prevent the insulating film 400 from winding.

[0148] The stator 1 has a cut position 400d of the insulating film 400 at a location where the minimum creepage distance is satisfied, and also has a cut position 400d of the insulating film 400 based on the cutable portion 400b on the back side 2a of the split stator core 2. That is, for the cut position 400d of the insulating film 400 based on the cutable portion 400b, the cut position of the insulating film 400 exists on the back side 2a of the core, rather than in the gap between adjacent split stator cores 2.

[0149] The cut position 400d of the insulating film 400 is formed at the aforementioned position, thereby causing the insulating film 400 to overlap with the gap between adjacent segmented stator cores 2. Furthermore, the overlapping portion 400c, including the end of the cut insulating film 400, overlaps with a portion of the winding 4. Therefore, when the stator 1 is bent into a ring shape, a portion of the insulating film 400, preventing deflection, gets stuck in the gap between adjacent segmented stator cores 2.

[0150] Furthermore, even when the insulating film 400 is wound into the winding 4 before winding the winding 4 onto the tooth 2b, the insulating film 400, being cut, does not possess the force to fix the winding nozzle onto the winding track because the cut portion of the insulating film 400 is a free end. Therefore, the stator 1 can achieve performance improvements based on high-density windings using insulation based on the insulating film 400 without being affected by the winding posture, and there is no concern about damage to the front end of the winding nozzle.

[0151] Implementation method 2.

[0152] Figure 19This is a schematic diagram illustrating the cutable portion 400b of the insulating film 400A, using a top view and a side view on the inner diameter side of the stator 1 according to Embodiment 2. Components having the same function and effect as the stator 1 of Embodiment 1 are labeled with the same reference numerals and their descriptions are omitted. Hereinafter, the description will focus on the differences between Embodiment 2 and Embodiment 1; structures not described in Embodiment 2 are the same as in Embodiment 1. The forming direction of the cutable portion 400b of the specific insulating film 400A in the stator 1 of Embodiment 2.

[0153] like Figure 19 As shown, the cutable portion 400b of the insulating film 400A is formed on different lines on the back 2a of the core of the segmented stator core 2 closest to the upper and lower ends of the insulating film 400A. The cutable portion 400b is formed such that, relative to adjacent segmented stator cores 2, the upper segmented stator core 2 closest to the lower segmented stator core 2 is different from the lower segmented stator core 2. That is, the cutable portion 400b of the insulating film 400A is formed inclined relative to the centerline 51a passing through the center of the connecting portion 51. Alternatively, the cutable portion 400b of the insulating film 400A is formed inclined relative to the axial direction of the stator 1.

[0154] exist Figure 19 In this configuration, the upper end of the cutable portion 400b is close to the back of the left iron core 2a1, and the lower end of the cutable portion 400b is close to the back of the right iron core 2a2, but it can also be the other way around. That is, the upper end of the cutable portion 400b can be close to the back of the right iron core 2a2, and the lower end of the cutable portion 400b can be close to the back of the left iron core 2a1.

[0155] [The function and effect of stator 1]

[0156] Figure 20 This is a schematic diagram showing the overlapping state of the insulating film 400A of the stator 1 in Embodiment 2. Figure 21 This is an enlarged view of the slot 301 portion of the stator 1 in Embodiment 2, and it shows... Figure 20 An enlarged view showing the relationship between the insulating film 400A on one end side of part A and the winding 4. Figure 22 This is an enlarged view of the slot 301 portion of the stator 1 in Embodiment 2, and it shows... Figure 20 An enlarged view showing the relationship between the insulating film 400A on the other end side of part A and the winding 4.

[0157] The stator 1 has a cut position 400d of the insulating film 400A at a location where the minimum creepage distance is satisfied, and also has a cut position 400d of the insulating film 400A based on the cutable portion 400b on the back side 2a of the split stator core 2. That is, for the cut position 400d of the insulating film 400A based on the cutable portion 400b, the cut position of the insulating film 400A exists on the back side 2a of the core, rather than in the gap between adjacent split stator cores 2.

[0158] The cutting position 400d of the insulating film 400A is formed at the aforementioned position, thereby as follows: Figure 21 and Figure 22 As shown, the insulating film 400A overlaps with the gap between the adjacent segmented stator core 2. Additionally, as... Figure 21 and Figure 22 As shown, the overlapping portion 400c, including the end of the cut insulating film 400A, overlaps with a portion of the winding 4. Therefore, when the stator 1 is bent into a ring shape, a portion of the insulating film 400A, which prevents deflection, gets stuck in the gap between adjacent split stator cores 2.

[0159] The cutable portion 400b is formed to be axially inclined relative to the stator 1, such that the uppermost segmented stator core 2 is different from the lowermost segmented stator core 2 relative to adjacent segmented stator cores 2. For example... Figure 21 As shown, the upper end of the cutable portion 400b is close to the back of the left core 2a1, therefore the overlapping portion 400c, including the end of the cut insulating film 400A, is configured to overlap with a portion of the winding 4 wound on the left toothed portion 2b1. Furthermore, in Figure 22 In the middle, the lower end of the cuttable portion 400b is close to the back of the right iron core 2a2, so the overlapping portion 400c, which includes the end of the cut insulating film 400A, is configured to overlap with a part of the winding 4 wound on the right tooth portion 2b2.

[0160] In Embodiment 2, because the cutable portion 400b of the stator 1 is cut at an angle, the insulating film 400A is only cut in the axial direction, unlike the stator 1 of Embodiment 1. A portion of the insulating film 400A is not removed, so the gap between adjacent split stator cores 2 is covered shortly after winding is completed. Therefore, compared to the stator 1 of Embodiment 1, the stator 1 of Embodiment 2 further reduces the risk of the insulating film 400A becoming stuck.

[0161] Implementation method 3.

[0162] Figure 23 This is a schematic diagram illustrating the cutable portion 400b of the insulating film 400B, showing a top view and a side view of the inner diameter side of the stator 1 using Embodiment 3. Figure 24This is a schematic side view showing the insulating film 400B used in the stator 1 of Embodiment 3. Components having the same function and effect as the stator 1 in Embodiments 1 and 2 are labeled with the same reference numerals and their descriptions are omitted. Hereinafter, the description will focus on the differences between Embodiment 3 and Embodiments 1 and 2; structures not described in Embodiment 3 are the same as in Embodiments 1 and 2. Embodiment 3 further specifies the structure of the insulator 300 and the structure of the insulating film 400.

[0163] like Figure 23 and Figure 24 As shown, the insulating film 400B has two cutable portions 400b, such that, in the radial direction of the stator 1, the cut-off positions based on the cutable portions 400b are located on the left core back 2a1 and the right core back 2a2. That is, the cutable portions 400b of the stator 1 are respectively formed at positions opposite to the core back 2a of the adjacent segmented stator core 2 in the left and right directions, i.e., the core back 2a that forms the slot 301.

[0164] like Figure 23 As shown, the insulator 300, as an insulating component, has two fixing claws: a fixing claw 310 and a second fixing claw 311. The second fixing claw 311 is formed on the back sidewall portion 321 of the iron core (see reference). Figure 3 The second fixing claw 311 is configured to be located on the side of the core back 2a forming the slot 301 when the insulator 300 is installed on the segmented stator core 2. The second fixing claw 311 is formed on the side closer to the connecting portion 51 than the fixing claw 310. The second fixing claw 311 has the same strength as the fixing claw 310. The second fixing claw 311 is formed on the connecting side of the plurality of segmented stator cores 2 than the fixing claw 310, and supports the insulating film 400 disposed at a position opposite to the core back 2a.

[0165] Figure 25 This is a top view showing the stator 1 of embodiment 3 with the insulator 300 and winding 4 installed in the split stator core 2. Figure 26 It means Figure 25 An enlarged top view of section B of stator 1 is shown. Figure 26 As shown, the portion of the back of the iron core 2a that is opposite to the winding 4 in the slot 301 via the insulator 300 is designated as the winding configurable portion 330 of the back of the iron core 2a. Figure 26 The winding configuration end 335 shown is the end on the back side 2a of the iron core where the winding 4 can be configured circumferentially. The stator 1 can be in slot 301 (see reference). Figure 4 Within the toothed portion 2b, a winding 4 is arranged between the toothed portion 2b and the winding configurable portion 330.

[0166] Furthermore, the circumferential direction of the back side 2a of the core and the circumferential direction of the winding configuration portion 330, in the case of the back side 2a1 of the left core, refers to the direction along the side surface 2a11 of the left core back when viewing the stator 1 from above (refer to...). Figure 8 Additionally, when the circumferential direction of the configurable portion 330 of the winding is on the back side 2a2 of the right core, it refers to the direction along the side surface 2a21 of the back side of the right core when viewing the stator 1 from above (see reference). Figure 8 Here, the circumferential length of the configurable winding portion 330 is set as the configurable winding length j [mm].

[0167] like Figure 26 As shown, the circumferential length of the fixing claw 310 is defined as the core claw length k [mm]. In the case of the left side of the iron core back 2a1, the circumferential direction of the fixing claw 310 refers to the direction along the side surface 2a11 of the left side of the iron core back when viewing the stator 1 from above (refer to...). Figure 8 Additionally, the circumferential direction of the fixing claw 310, in the case of the right side back 2a2 of the iron core, refers to the direction along the side 2a21 of the right side back of the iron core when viewing the stator 1 from above (see reference). Figure 8 ).

[0168] like Figure 26 As shown, the radial length of the fixing claw 310 is defined as the length l [mm] of the toothed claw. In the case of the left toothed portion 2b1, the radial direction of the fixing claw 310 refers to the direction along the left toothed side surface 2b11 when viewing the stator 1 from above (refer to...). Figure 8 Furthermore, the radial direction of the fixing claw 310 in the case of the right tooth portion 2b2 refers to the direction along the right tooth lateral surface 2b21 when the stator 1 is viewed from above (see reference). Figure 8 ), and refers to the direction along the central axis of tooth 2b.

[0169] like Figure 26 As shown, the circumferential length of the second fixing claw 311 is defined as the length m [mm] of the second core claw. The circumferential direction of the second fixing claw 311, in the case of the left side of the iron core back 2a1, refers to the direction along the side surface 2a11 of the left side of the iron core back when viewing the stator 1 from above (refer to...). Figure 8 Additionally, the circumferential direction of the second fixing claw 311, in the case of the right side back 2a2 of the iron core, refers to the direction along the side 2a21 of the right side back of the iron core when viewing the stator 1 from above (see reference). Figure 8 ).

[0170] like Figure 26 As shown, the radial length of the second fixing claw 311 is defined as the length n [mm] of the second toothed claw. The radial direction of the second fixing claw 311 in the case of the left toothed portion 2b1 refers to the direction along the left toothed side surface 2b11 when viewing the stator 1 from above (refer to...). Figure 8 Furthermore, the radial direction of the second fixing claw 311, in the case of the right tooth portion 2b2, refers to the direction along the right tooth lateral surface 2b21 when the stator 1 is viewed from above (see reference). Figure 8 ), and refers to the direction along the central axis of tooth 2b.

[0171] The length of stator 1 obtained by subtracting the core claw length k from the configurable winding length j is formed to be a length of the second core claw length m or more. Furthermore, the second core claw length m of stator 1 is formed to be a length of the core claw length k or more. That is, stator 1 is formed to satisfy the formula that configurable winding length j - core claw length k ≥ second core claw length m ≥ core claw length k.

[0172] Furthermore, the length l of the toothed portion of stator 1 is formed to be a length greater than or equal to the length n of the second toothed portion. Additionally, the length n of the second toothed portion of stator 1 is formed to be a length greater than or equal to 0.3 mm. That is, stator 1 is formed to satisfy the formula that the length l of the toothed portion ≥ the length n of the second toothed portion ≥ 0.3 mm. Furthermore, 0.3 mm is set based on the minimum thickness of the insulator 300 when it is injection molded as an insulating component for the motor.

[0173] [The function and effect of stator 1]

[0174] Figure 27 This is a schematic diagram showing the insulating film 400B of the stator 1 in Embodiment 3. Figure 28 This is an enlarged view of the slot 301 portion of the stator 1 in Embodiment 3, and is Figure 27 An enlarged view of part A of stator 1 shown.

[0175] The stator 1 has a cut position 400d of the insulating film 400B at a location where the minimum creepage distance is satisfied, and also has a cut position 400d of the insulating film 400B based on the cutable portion 400b on the back side 2a of the split stator core 2. That is, for the cut position 400d of the insulating film 400B based on the cutable portion 400b, the cut position of the insulating film 400B exists on the back side 2a of the core, rather than in the gap between adjacent split stator cores 2.

[0176] The cutting position 400d of the insulating film 400B is formed at the aforementioned position, thereby ensuring that the insulating film 400B does not cover the gap between adjacent segmented stator cores 2. Therefore, when the stator 1 bends the segmented stator cores 2 into a ring shape, a portion of the flexed insulating film 400B will not get stuck in the gap between adjacent segmented stator cores 2.

[0177] The cutable portions 400b are respectively formed at positions opposite to the back sides 2a of the core of the segmented stator core 2 adjacent to the forming slot 301. That is, the stator 1 is formed such that the cutable portions 400b are located on the back sides 2a of the core on both the left and right sides of the forming slot 301. The insulating film 400B can cut off the portion between the two cutable portions 400b. After the insulating film 400B is cut, there is no insulating film 400B covering the gap of the segmented stator core 2 until the segmented stator core 2 is arranged in a ring shape. Therefore, the stator 1 of Embodiment 3 can suppress the occurrence of the insulating film 400B getting stuck.

[0178] Each pair of insulators 300 also has a second retaining claw 311, which is formed on the connecting side of the plurality of segmented stator cores 2 closer than the retaining claw 310, and supports the insulating film 400B disposed at a position opposite to the back 2a of the core. That is, the stator 1 has both the retaining claw 310 and the second retaining claw 311. By having the second retaining claw 311, the stator 1 can improve its function of preventing the insulating film 400B from floating, and compared with the stator 1 of Embodiment 1 which only has the retaining claw 310, it can increase the force that stretches the insulating film 400.

[0179] The stator 1 is configured to satisfy the formula that the configurable winding length j - core claw length k ≥ second core claw length m ≥ core claw length k. When the stator 1 is configured to satisfy the formula that the configurable winding length j - core claw length k ≥ second core claw length m ≥ core claw length k, the following effect is achieved. When the stator 1 satisfies the above formula, in the portion of the insulator 300 that is an insulating component opposite to the back 2a of the iron core, at a position near the gap between the stator cores 2 and the configurable winding portion 330, a second fixing claw 311 with the same strength as the fixing claw 310 can be configured. In addition to the fixing claw 310, the stator 1 also has the second fixing claw 311 at this position, thereby preventing the insulating film 400B from penetrating the winding region 401 (…). Figure 15 It floats up.

[0180] When the stator 1 is formed to satisfy the formula that the length of the tooth claw l ≥ the length of the second tooth claw n ≥ 0.3 [mm], the moldability of the insulator 300 as an insulating component can be ensured by injection molding.

[0181] The rotary motor 103, which serves as the electric motor of the compressor 130, the compressor 130 having the rotary motor 103, and the refrigeration cycle device 200 having the compressor 130 are equipped with the stator 1 of Embodiments 1 to 3. The rotary motor 103, which serves as the electric motor of the compressor 130, the compressor 130 having the rotary motor 103, and the refrigeration cycle device 200 having the compressor 130 can achieve the same effects as the stator 1 of Embodiments 1 to 3.

[0182] The structure shown in the above embodiments is an example, and it can also be combined with other known technologies. Without departing from the main idea, some parts of the structure can be omitted or changed.

[0183] Explanation of reference numerals in the attached figures

[0184] 1...Stator; 1L...Stator; 2...Divided stator core; 2a...Back of core; 2a1...Left back of core; 2a11...Side of left back of core; 2a13...Left connecting end; 2a2...Back of right core; 2a21...Side of right back of core; 2a23...Right connecting end; 2b...Tooth; 2b1...Left tooth; 2b11...Side of left tooth; 2b2...Right tooth; 2b21...Side of right tooth; 2c...Tooth front end; 2c1...Tooth front end; 2c11...Side of left front end; 2c2...Tooth front end; 2c21...Side of right front end; 2d ...side wall portion; 4...winding; 4g...winding terminal portion; 5...rotor; 9...conductor wire; 21...rotor core; 22...magnet insertion hole; 23...refrigerant flow path; 24...permanent magnet; 25a...upper counterweight; 25b...lower counterweight; 26...rivet; 26a...rivet hole; 51...connection portion; 51a...centerline; 101...sealed container; 101a...upper container; 101b...lower container; 102...compression mechanism portion; 103...rotary motor; 104...crankshaft; 104a...rotating shaft; 104c...eccentric portion; 105...cylinder block; 106... 107... Lower bearing; 108... Silencer; 108a... Opening; 109... Rotary piston; 119... Glass terminal; 127... Suction silencer; 128... Suction connecting pipe; 129... Discharge pipe; 130... Compressor; 133... Flow path switching device; 134... Outdoor heat exchanger; 135... Pressure reducing device; 136... Indoor heat exchanger; 200... Refrigeration cycle device; 201... Refrigerant circuit; 300... Insulator; 301... Slot; 302... End; 303... Recessed portion; 310... Fixing claw; 310a... Bottom; 310b... Inclined portion 311...Second fixing claw; 312...Opposing surface; 313...Concave portion; 320...Inner wall portion; 321...Back side wall portion of the core; 322...Tooth side wall portion; 325...Upper wall portion; 330...Wound configuration portion; 335...Wound configuration end; 400...Insulating film; 400A...Insulating film; 400B...Insulating film; 400L...Insulating film; 400b...Cutable portion; 400b1...Cut-off portion; 400b2...Connecting portion; 400c...Overlapping portion; 400d...Cut-off position; 400e...Interlocking portion; 401...Winding area; 402...Divided stator core.

Claims

1. A stator for a rotating electric motor, characterized in that, have: Multiple segmented stator cores are interconnected and arranged in a ring shape; A pair of insulators, which serve as insulating components, are disposed on the axial end faces of each of the plurality of segmented stator cores; as well as An insulating film, which is installed on the surface of the slots forming the spaces between adjacent segmented stator cores of the plurality of segmented stator cores, insulates the winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: The back of the iron core extends circumferentially along the stator; and The teeth protrude from the center of the back of the iron core toward the center of the stator, for winding of the winding. The insulating film contacts the back of the iron core and is respectively disposed in adjacent segmented stator cores of the plurality of segmented stator cores. Each end of the insulating film has a concave-convex portion with the same concave-convex shape as the end. The end of the insulating film having the aforementioned irregularities is arranged to overlap with the adjacent insulating film. The pair of insulators has a retaining claw that, when the pair of insulators is installed in each of the plurality of segmented stator cores, secures the insulating film to the intersection of the back of the core and the teeth, i.e., the root portion of the teeth. The insulating film contacts the back of the core in the slot and is respectively disposed in the adjacent segmented stator cores, with the adjacent insulating films overlapping each other. The pair of insulators also have a second retaining claw formed on the connecting side of the plurality of segmented stator cores, closer than the retaining claws, to support the insulating film disposed opposite the back of the cores. The portion of the back of the iron core that is opposite the winding in the slot via the pair of insulators is designated as the configurable winding portion of the back of the iron core. Let the circumferential length of the configurable portion of the winding be defined as the configurable winding length j. The circumferential length of the fixed claw is defined as the core claw length k. The length of the fixing claw in the radial direction of the stator is defined as the length l of the toothed claw. The circumferential length of the second fixing claw is set as the length m of the second core claw. When the length of the second fixing claw in the radial direction of the stator is set to the length n of the second toothed claw. The stator is configured to satisfy the following formula: The winding can be configured with a length j - the core claw length k ≥ the second core claw length m ≥ the core claw length k, and The length l of the toothed claw is greater than or equal to the length n of the second toothed claw, which is greater than or equal to 0.3 mm.

2. A stator for a rotary electric motor, characterized in that, have: Multiple segmented stator cores are interconnected and arranged in a ring shape; A pair of insulators, which serve as insulating components, are disposed on the axial end faces of each of the plurality of segmented stator cores; as well as An insulating film, which is installed on the surface of the slots forming the spaces between adjacent segmented stator cores of the plurality of segmented stator cores, insulates the winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: The back of the iron core extends circumferentially along the stator; and The teeth protrude from the center of the back of the iron core toward the center of the stator, for winding of the winding. The pair of insulators has a retaining claw that, when the pair of insulators is installed in each of the plurality of segmented stator cores, secures the insulating film to the intersection of the back of the core and the teeth, i.e., the root portion of the teeth. The insulating film contacts the back of the core in the slot and is respectively disposed in the adjacent segmented stator cores, with the adjacent insulating films overlapping each other. The pair of insulators also have a second retaining claw formed on the connecting side of the plurality of segmented stator cores, closer than the retaining claws, to support the insulating film disposed opposite the back of the cores. The portion of the back of the iron core that is opposite the winding in the slot via the pair of insulators is designated as the configurable winding portion of the back of the iron core. Let the circumferential length of the configurable portion of the winding be defined as the configurable winding length j. The circumferential length of the fixed claw is defined as the core claw length k. The length of the fixing claw in the radial direction of the stator is defined as the length l of the toothed claw. The circumferential length of the second fixing claw is set as the length m of the second core claw. When the length of the second fixing claw in the radial direction of the stator is set to the length n of the second toothed claw. The stator is configured to satisfy the following formula: The winding can be configured with a length j - the core claw length k ≥ the second core claw length m ≥ the core claw length k, and The length l of the toothed claw is greater than or equal to the length n of the second toothed claw, which is greater than or equal to 0.3 mm.

3. A rotary electric motor, characterized in that, have: The stator as described in claim 2; and The rotor is located inside the stator and rotates by means of magnetic force.

4. A compressor, characterized in that, have: The rotary motor according to claim 3; A compression mechanism, driven by the rotary motor, compresses fluid drawn in from the outside; and A sealed container that houses the rotary motor and the compression mechanism.

5. A refrigeration cycle device, characterized in that, have: The compressor as described in claim 4; An outdoor heat exchanger that exchanges heat between outdoor air and the refrigerant flowing inside; A pressure reducing device that reduces the pressure of the refrigerant flowing inside it; as well as An indoor heat exchanger is used to exchange heat between indoor air and refrigerant flowing inside.

6. A stator for a rotating electric motor, characterized in that, have: Multiple segmented stator cores are interconnected and arranged in a ring shape; A pair of insulators, which serve as insulating components, are disposed on the axial end faces of each of the plurality of segmented stator cores; as well as An insulating film, which is installed on the surface of the slots forming the spaces between adjacent segmented stator cores of the plurality of segmented stator cores, insulates the winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: The back of the iron core extends circumferentially along the stator; and The teeth protrude from the center of the back of the iron core toward the center of the stator, for winding of the winding. The pair of insulators has a retaining claw that, when the pair of insulators is installed in each of the plurality of segmented stator cores, secures the insulating film to the intersection of the back of the core and the teeth, i.e., the root portion of the teeth. The insulating films disposed in the adjacent segmented stator cores are formed by cutting a single insulating film into two pieces. In the winding posture of the stator, where the winding is wound around the plurality of segmented stator cores, an insulating film fixed to the pair of insulators has a plurality of cutable portions, which alternately form: cut portions where the insulating film is broken and connected portions where the insulating film is not broken. The end of the insulating film is formed by being broken at the cutable portion. The cutable portions are respectively formed at positions opposite to the back of the adjacent segmented stator core that forms the slot. The pair of insulators also have a second retaining claw formed on the connecting side of the plurality of segmented stator cores, closer than the retaining claws, to support the insulating film disposed opposite the back of the cores. The portion of the back of the iron core that is opposite the winding in the slot via the pair of insulators is designated as the configurable winding portion of the back of the iron core. Let the circumferential length of the configurable portion of the winding be defined as the configurable winding length j. The circumferential length of the fixed claw is defined as the core claw length k. The length of the fixing claw in the radial direction of the stator is defined as the length l of the toothed claw. The circumferential length of the second fixing claw is set as the length m of the second core claw. When the length of the second fixing claw in the radial direction of the stator is set to the length n of the second toothed claw. The stator is configured to satisfy the following formula: The winding can be configured with a length j - the core claw length k ≥ the second core claw length m ≥ the core claw length k, and The length l of the toothed claw is greater than or equal to the length n of the second toothed claw, which is greater than or equal to 0.3 mm.

7. A stator for a rotating electric motor, characterized in that, have: Multiple segmented stator cores are interconnected and arranged in a ring shape; A pair of insulators, which serve as insulating components, are disposed on the axial end faces of each of the plurality of segmented stator cores; as well as An insulating film, which is installed on the surface of the slots forming the spaces between adjacent segmented stator cores of the plurality of segmented stator cores, insulates the winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: The back of the iron core extends circumferentially along the stator; and The teeth protrude from the center of the back of the iron core toward the center of the stator, for winding of the winding. The insulating film contacts the back of the iron core and is respectively disposed in adjacent segmented stator cores of the plurality of segmented stator cores. Each end of the insulating film has a concave-convex portion with the same concave-convex shape as the end. The end of the insulating film having the aforementioned irregularities is arranged to overlap with the adjacent insulating film. The insulating films disposed in the adjacent segmented stator cores are formed by cutting a single insulating film into two pieces. In the winding posture of the stator, where the winding is wound around the plurality of segmented stator cores, a piece of insulating film fixed to the pair of insulators has a cuttable portion, which alternately comprises: a cut portion where the insulating film is broken, and a connecting portion where the insulating film is not broken. The end of the insulating film is formed by breaking it at the cutable portion. The distance from the portion of the winding that contacts the insulating film at the position furthest from the tooth (i.e., the winding end portion) to the portion that contacts the back of the adjacent segmented stator core in the slot (i.e., the core end portion) is defined as the end length a. With the winding wound around the stator in the winding posture of the plurality of segmented stator cores, the size of the gap between the back sides of adjacent cores is defined as the gap distance b. When viewed radially along the stator, the distance from the center of the connecting portion linking the adjacent segmented stator cores to the cuttable portion is defined as the cutting distance c. Let the thickness of the insulating film be defined as thickness f. When the length of the insulating film along the axial direction of the stator is set as the axial length h, The stator is configured to satisfy the following formula: The cutting distance c is greater than the gap distance b / 2, and The end length a + the gap distance b / 2 - the cutting distance c + the thickness f > the preset minimum creepage distance.

8. A rotary electric motor, characterized in that, have: The stator as described in claim 7; and The rotor is located inside the stator and rotates by means of magnetic force.

9. A compressor, characterized in that, have: The rotary motor as claimed in claim 8; A compression mechanism, driven by the rotary motor, compresses fluid drawn in from the outside; and A sealed container that houses the rotary motor and the compression mechanism.

10. A refrigeration cycle device, characterized in that, have: The compressor as described in claim 9; An outdoor heat exchanger that exchanges heat between outdoor air and the refrigerant flowing inside; A pressure reducing device that reduces the pressure of the refrigerant flowing inside it; as well as An indoor heat exchanger is used to exchange heat between indoor air and refrigerant flowing inside.

11. A stator for a rotating electric motor, characterized in that, have: Multiple segmented stator cores are interconnected and arranged in a ring shape; A pair of insulators, which serve as insulating components, are disposed on the axial end faces of each of the plurality of segmented stator cores; as well as An insulating film, which is installed on the surface of the slots forming the spaces between adjacent segmented stator cores of the plurality of segmented stator cores, insulates the winding wound around each of the plurality of segmented stator cores from the plurality of segmented stator cores. Each of the plurality of segmented stator cores has: The back of the iron core extends circumferentially along the stator; and The teeth protrude from the center of the back of the iron core toward the center of the stator, for winding of the winding. The pair of insulators has a retaining claw that, when the pair of insulators is installed in each of the plurality of segmented stator cores, secures the insulating film to the intersection of the back of the core and the teeth, i.e., the root portion of the teeth. The insulating films disposed in the adjacent segmented stator cores are formed by cutting a single insulating film into two pieces. In the winding posture of the stator, where the winding is wound around the plurality of segmented stator cores, an insulating film fixed to the pair of insulators has a plurality of cutable portions, which alternately form: cut portions where the insulating film is broken and connected portions where the insulating film is not broken. The end of the insulating film is formed by being broken at the cutable portion. The cutable portions are respectively formed at positions opposite to the back of the adjacent segmented stator core that forms the slot. The distance from the portion of the winding that contacts the insulating film at the position furthest from the tooth (i.e., the winding end portion) to the portion that contacts the back of the adjacent segmented stator core in the slot (i.e., the core end portion) is defined as the end length a. With the winding wound around the stator in the winding posture of the plurality of segmented stator cores, the size of the gap between the back sides of adjacent cores is defined as the gap distance b. When viewed radially along the stator, the distance from the center of the connecting portion linking the adjacent segmented stator cores to the cuttable portion is defined as the cutting distance c. Let the thickness of the insulating film be defined as thickness f. When the length of the insulating film along the axial direction of the stator is set as the axial length h, The stator is configured to satisfy the following formula: The cutting distance c is greater than the gap distance b / 2, and The end length a + the gap distance b / 2 - the cutting distance c + the thickness f > the preset minimum creepage distance.

12. A rotary electric motor, characterized in that, have: The stator as claimed in claim 11; and The rotor is located inside the stator and rotates by means of magnetic force.

13. A compressor, characterized in that, have: The rotary motor according to claim 12; A compression mechanism, driven by the rotary motor, compresses fluid drawn in from the outside; and A sealed container that houses the rotary motor and the compression mechanism.

14. A refrigeration cycle device, characterized in that, have: The compressor according to claim 13; An outdoor heat exchanger that exchanges heat between outdoor air and the refrigerant flowing inside; A pressure reducing device that reduces the pressure of the refrigerant flowing inside it; as well as An indoor heat exchanger is used to exchange heat between indoor air and refrigerant flowing inside.

Images