Electric motor and compressor using it

Abstract

The motor includes a rotor and a stator that rotates the rotor. The stator is formed by magnetically coupling a plurality of divided stator blocks 21. The divided stator blocks are formed by folding and stacking a plurality of stator plates 24 that integrally have yoke portions 22 and tooth portions 23 and are continuously coupled. Thus, the process of aligning and stacking the shapes of the individual stator plates 24 can be simplified, manufacturing costs can be reduced, and an inexpensive motor and compressor using the same can be provided.

Description

TECHNICAL FIELD

[0001] The present application relates to an electric motor and a compressor using the same. BACKGROUND

[0002] Patent Document 1 discloses one of a part of a stator used in a conventional electric motor, i.e., a divided stator block. The stator of the electric motor is formed in a circular ring shape by magnetically joining a plurality of divided stator blocks. Each of the divided stator blocks is formed as shown in Figs. 1 and 2 by sandwiching a second laminated body 104 between first laminated bodies 102. The first laminated bodies 102 are configured by laminating a plurality of stator plates 101 formed of an electromagnetic steel plate, and the second laminated body 104 is configured by laminating a plurality of stator plates 103 formed of an amorphous thin plate. The first laminated bodies 102 and the second laminated body 104 are each configured by laminating a plurality of the respective stator plates 101 and 103 which are separately separated. In addition, the stator plate 103 formed of the amorphous thin plate is divided into a yoke portion 105 and a tooth portion 106 to be formed separately and configured by joining. Figure 15 Figure 16

[0003] PRIOR ART DOCUMENT

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-155347 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The present application provides an electric motor and a compressor using the same, in which a lamination process of stator plates constituting a divided stator block is simplified, and manufacturing cost is reduced.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] The electric motor of the present application is an electric motor configured by joining divided stator blocks, the divided stator blocks being formed in a structure in which a plurality of stator plates integrally having a yoke portion and a tooth portion are continuously joined and folded and laminated.

[0010] EFFECTS OF THE INVENTION

[0011] The electric motor of the present application can reduce a complicated and time-consuming process of aligning and laminating the shapes of the respective stator plates which are separately separated when laminating the stator plates, and does not require a process of joining the yoke portion and the tooth portion when forming the stator plates. Therefore, the lamination process can be greatly simplified, manufacturing cost can be reduced, and an inexpensive electric motor and a compressor using the same can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 ​​is a sectional view of the electric motor of Embodiment 1 and a compressor using it.

[0013] Figure 2 is a perspective view showing the stator of the electric motor (motor portion) of this Embodiment 1.

[0014] Figure 3 is an exploded perspective view showing the state before the winding of the stator of this motor portion.

[0015] Figure 4 is a perspective view of the stator of the motor portion and the divided stator blocks constituting it.

[0016] Figure 5 is an enlarged perspective view of the divided stator block of this motor portion.

[0017] Figure 6 is a perspective view of the stator plate constituting the divided stator block of this motor portion.

[0018] Figure 7 is a plan view of the stator material plate for explaining the stator plate molding of the stator.

[0019] Figure 8 is a perspective view showing the state before the installation of this motor portion to the compressor.

[0020] Figure 9 is an exploded perspective view of Figure 8

[0021] Figure 10 is an enlarged sectional view showing the fixing structure portion of the motor portion with respect to the closed container of the compressor in Embodiment 1.

[0022] Figure 11 is a sectional view showing the fixing structure of the motor portion with respect to the closed container of the compressor in Embodiment 2.

[0023] Figure 12 is a plan view (top view) of the stator material plate for explaining another fixing structure of the motor portion with respect to the closed container in Embodiment 3.

[0024] Figure 13 is a perspective view of the stator constituted by laminating the stator plates obtained by the mold molding from the stator material plate in this Embodiment 3.

[0025] Figure 14 is a plan view showing the state of the fixing of the stator in this Embodiment 3 to the closed container of the compressor by the heat fitting (shrink fitting).

[0026] Figure 15 is a perspective view of the stator divided stator block constituting the conventional electric motor.

[0027] ​Figure 16 is an exploded perspective view showing a yoke portion and a tooth portion of a divided stator block constituting a stator of a conventional motor. DETAILED DESCRIPTION

[0028] (Knowledge and the like as a basis of the present application)

[0029] At the time when the inventors conceived the present application, the motor described in Patent Document 1 was known. In this motor, a first layer 102 and a second layer 104 constitute a divided stator block (also referred to as "divided stator assembly"), and each of the stator plates constituting the first layer 102 and the second layer 104 is formed separately. Therefore, when the stator plates 101, 103 to constitute the first layer 102 or the second layer 104 are to be layered, it is necessary to layer such a complicated procedure of making the shapes of the respective stator plates 101, 103, which are separately formed, uniform. Specifically, the amorphous thin plate constituting the second layer 104 is very thin compared with the electromagnetic steel plate. Therefore, it is currently impossible to rivet and stack within a press die as with the electromagnetic steel plate, and it is necessary to bond and layer the stator plates, which are cut to a prescribed shape in advance, with an adhesive, and there is a problem that the manufacturing cost increases. In addition, in the case where the plate thickness of the electromagnetic steel plate constituting the first layer 102 is made to be the same degree of thinness as the amorphous thin plate, the electromagnetic steel plate is cut to a prescribed shape in advance, and then the respective stator plates are aligned and bonded with an adhesive to be layered, so the manufacturing cost increases. Furthermore, the complicated procedure of making the shapes of the above-described stator plates 101, 103 uniform to be layered needs to be performed in accordance with the number of the divided stator blocks 100 constituting the stator, so the influence on the manufacturing cost is large, and the increase in the manufacturing cost is promoted. In addition, the stator plate 103 constituting the second layer 104 can be highly efficient because the amorphous thin plate, which has a small iron loss, is used. However, the procedure of forming and joining the yoke portion 105 and the tooth portion 106 separately is required, and there is a technical problem that the manufacturing cost further increases.

[0030] The present application has been achieved in view of such problems, and to solve these technical problems.

[0031] Therefore, the present application provides an inexpensive motor in which the layering procedure of the stator plates constituting the divided stator block is simplified, and the manufacturing cost is reduced, and a compressor using the same.

[0032] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, there are cases where the detailed description is omitted to the extent necessary. For example, sometimes the detailed description of known matters is omitted, or in the modified examples, the same reference numerals are attached to substantially the same structures, and the repeated description is omitted. This is to avoid the following description from becoming unnecessarily long, and to make it easy for those skilled in the art to understand.

[0033] Furthermore, the present application is described using a rotary compressor using a motor as an example, but the motor of the present application and the compressor using the same are not limited to the structure of the motor and the rotary compressor described in the following embodiments, including the structure of the motor and the compressor equivalent to the technical idea described in the following embodiments.

[0034] In addition, the embodiments described below are a mode of one example of the present application, and the structure, function, action, and the like shown in the embodiments are examples and do not limit the content of the present application.

[0035] (Embodiment 1)

[0036] Hereinafter, the following Figures 1-10 Embodiment 1 of the motor of the present application and the compressor using the same will be described.

[0037] [1-1. Structure]

[0038] (Embodiment 1)

[0039] Figure 1 is a longitudinal sectional view of a compressor using the motor of the embodiment of the present application.

[0040] The compressor of the present embodiment is configured by providing a motor portion (motor) 2 and a compression mechanism portion 3 in a hermetic container 1. The hermetic container 1 is configured by a cylindrical housing 5, an upper cover 6 that closes the opening of the housing 5, and a lower cover 7.

[0041] The compression mechanism portion 3 is disposed at the lower portion of the housing 5. In addition, the motor portion 2 is disposed above the compression mechanism portion 3 in the inside of the housing 5, and is linked to the compression mechanism portion 3 by a drive shaft 4.

[0042] In addition, a terminal 8 for supplying power to the motor portion 2 is provided in the upper cover 6. Also, an oil groove 9 for storing oil for lubrication is formed in the bottom of the hermetic container 1.

[0043] The motor portion 2 is configured by a stator 10 and a rotor 11. The rotor 11 is fixed to the drive shaft 4 and rotates together with the drive shaft 4. The drive shaft 4 is rotatably supported at both ends thereof by an upper bearing member 12 and a lower bearing member 13.

[0044] When the motor portion 2 is energized and the drive shaft 4 rotates, a drive shaft eccentric portion 14 of the drive shaft 4 performs eccentric rotation in a cylinder 15, and a rolling piston 16 performs rotational movement while abutting against a vane (not shown). Thus, suction and compression of refrigerant gas are repeatedly performed. The compression mechanism portion 3 includes the upper bearing member 12, the lower bearing member 13, the cylinder 15, the rolling piston 16, and the vane (not shown).

[0045] A discharge pipe 17 is provided at the upper part of the sealed container 1. The discharge pipe 17 passes through the upper part of the upper cover 6 and opens into the internal space of the sealed container 1, serving as a discharge path to guide the refrigerant gas compressed by the compression mechanism 3 to the outside of the sealed container 1. When the compressor is working, the internal space of the sealed container 1 is filled with compressed refrigerant.

[0046] Additionally, a suction connection pipe 19 for supplying refrigerant to the compression mechanism 3 is provided at the lower part of the sealed container 1. A liquid receiver 18 for separating refrigerant gas from liquid is connected to the suction connection pipe 19. The liquid receiver 18 is configured such that a refrigerant gas inlet pipe 20 is connected to its upper part, and a refrigerant gas outlet pipe connected to the suction connection pipe 19 is connected to its lower part.

[0047] The structure of the electric motor section 2 of the compressor configured in this way will be described.

[0048] The aforementioned motor unit 2 has a stator 10 arranged on the outer periphery of the rotor 11, the stator 10 as follows: Figure 4 The stator blocks 21 are arranged in a circular pattern. In this example, the circular pattern is formed by connecting the two circumferential sides 21a of each stator block 21 in a ring. Each stator block 21 includes a yoke 22 that forms an outer circumferential circle by connecting with other stator blocks 21 in a circular pattern; and a tooth 23 that protrudes radially from the yoke 22. The stator blocks 21 are magnetically connected by fusing (or welding) the two circumferential sides 21a of the yoke 22 on the outer periphery of the stator, or by a connection method based on the interlocking of protrusions and concave parts as described in Patent Document 1.

[0049] In addition, the stator plates 24 that constitute each segmented stator block 21, such as Figure 7 As shown, the stacking height dimension H (refer to) is obtained from the strip-shaped stator material plate 25. Figure 4 The segmented stator blocks 21 are molded in a continuously connected state. Furthermore, the yoke portion 22 and the tooth portion 23 are integrally molded in the connected stator plate portion 24a, as shown above. Figure 7 As shown, the connecting portions 26 of adjacent stator plate portions 24a, i.e., the two sides of the yoke portion 22, are as follows: Figure 6 The stator block 21 is formed by folding as shown.

[0050] At the inner and outer edges of the connecting portions (hereinafter referred to as folds) 26 of the adjacent stator plate portions 24a, such as Figure 7As shown, the width M is narrower than the width L of the yoke 22, and acute-angled recesses 27 and obtuse-angled recesses 28 are formed to facilitate folding. Furthermore, when the segmented stator blocks 21 are connected into a ring shape, multiple recessed grooves 29 are formed to allow oil separated from the refrigerant to return to the lower part of the sealed container via adjacent obtuse-angled recesses 28 (see reference). Figure 2 Furthermore, in the yoke 22 of the stator plate 24 described above, as... Figure 7 As shown, an elongated hole 30 is provided in the folding direction of the stator plate, which serves as a general-purpose hole for inserting the guide pin (not shown) during the folding process.

[0051] Furthermore, in this embodiment, the stator material plate 25, which serves as the material for the stator plate 24, has a thickness of 0.1 mm or less. In this embodiment, a thin sheet of approximately tens of micrometers in thickness, formed from an amorphous alloy material or a nanocrystalline soft magnetic material whose properties are further improved, is used. The nanocrystalline soft magnetic material is a material whose soft magnetic properties are improved by applying appropriate heat treatment to achieve crystal control at the 10-nanometer (1 / 100,000 mm) level for a non-uniform amorphous (amorphous) alloy containing α-Fe cores, obtained by rapidly solidifying Fe-Si-BP-Cu alloy melt. That is, while the stator plate 24 has a thickness of 0.1 mm or less, in this embodiment, the stator plate 24 is constructed using a thin sheet of approximately tens of micrometers in thickness, formed from an amorphous alloy material or a nanocrystalline soft magnetic material.

[0052] Furthermore, the aforementioned stator 10, at both ends of each segmented stator block 21 in the stacking direction, in Figure 3 In the state shown, two reinforcing plates 31, formed of electromagnetic steel plates with the same shape as the stator plate 24, are stacked on the upper and lower surfaces to reinforce and protect the surface of the stator 10, separated by an insulating material 32 (see reference). Figure 2 The stator 10 is wound with a winding 33. The winding 33 of the stator 10 is connected to terminal 8 (see reference). Figure 1 It is connected to the inverter circuit (not shown) outside the compressor, and generates a magnetic field by energizing it, driving the rotor 11 at a specified speed.

[0053] Furthermore, such as Figure 8 , Figure 9As shown, the motor unit 2 has annular members 34a and 34b sandwiching the stator 10 on the reinforcing plates 31 located above and below it. These annular members 34a and 34b are fixed by heat fitting to the inner circumferential surface of the sealed container 1. That is, the stator 10 of the motor unit 2 is not heat-fitted, fused (or welded) to the sealed container 1, but is fixed by being sandwiched between the annular members 34a and 34b that are heat-fitted to the upper and lower parts of the sealed container 1. In this embodiment, the stator 10 is fixed relative to the sealed container 1 by heat fitting the annular members 34a and 34b while gently pressing the stator 10 from above and below. However, the reinforcing plates 31 can also be fixed by heat fitting.

[0054] In addition, such as Figure 10 As shown, the outer diameter of the stator plate 24 of the stator 10 of the motor section 2 is formed to be smaller than the outer diameter of the annular members 34a and 34b that clamp and fix the stator 10. Furthermore, in this embodiment, the materials of the annular members 34a and 34b with a coefficient of linear expansion smaller than that of the sealed container 1 can be used.

[0055] In addition, the aforementioned annular components 34a and 34b, as Figure 9 As shown, a pin 36 is formed in one of the annular components 34a. The pin 36 is embedded in a recessed groove 29 on the outer periphery of the stator 10, serving as a rotation stop to prevent the rotor 11 from rotating. A hole 37 is provided in another annular component 34b for the pin 36 to be fitted into.

[0056] The fixing of the aforementioned annular components 34a and 34b relative to the sealed container 1 is not limited to heat-fitting; it can also be achieved by laser-based welding or welding after slight heat-fitting.

[0057] [1-2. Actions]

[0058] The function of the electric motor constructed as described above and the compressor that uses it will be explained below.

[0059] The stator plates 24 of each of the divided stator blocks 21 that constitute the stator 10 are formed in a plurality of connected states by die molding, and are stacked while being folded at the folding portions 26. Thus, the stator plates 24 are automatically stacked with the shapes aligned. As a result, the complicated and time-consuming process of aligning the shapes of the individually separated stator plates 24 and stacking and bonding them together can be eliminated. That is, the complicated and time-consuming process of aligning the shapes of the individually separated stator plates 24 and stacking and bonding them together as in the prior art can be eliminated, and the stator plate stacking process can be simplified.

[0060] In addition, in the present embodiment, because the long holes 30 are provided in the stator plates 24 in the stator plate folding direction, a guide pin (not shown) can be fitted in the long holes 30 during folding. Thus, the alignment of the stator plates 24 during folding can be reliably prevented, and the stacking accuracy can be improved.

[0061] In addition, because the stator plates 24 are die molded to integrally have the shapes of the yoke portions 22 and the tooth portions 23, the process of joining the yoke portions 22 and the tooth portions 23 as in the stator plates of the prior art can be eliminated, and the stator plate stacking process can be further simplified.

[0062] Further, the stator plates 24 integrally having the shapes of the yoke portions 22 and the tooth portions 23 are very thin with a plate thickness of several tens of micrometers or less, and are formed using thin plates of amorphous alloy material or nanocrystalline soft magnetic material that has low iron loss or that has further improved characteristics, and thus the motor can be made more efficient.

[0063] Although it is difficult to die mold the complex-shaped stator plates 24 composed of the yoke portions 22 and the tooth portions 23 using thin plates of the amorphous alloy material or the nanocrystalline soft magnetic material, the applicant has achieved die molding of the stator plates 24 having the yoke portions 22 and the tooth portions 23 by die molding.

[0064] In addition, at both end surface portions of the divided stator block 21 formed by stacking the stator plates 24 made of the amorphous alloy material or the nanocrystalline soft magnetic material, the reinforcing plates 31 are stacked and arranged to reinforce and protect the surface of the stator 10, and the windings 33 are wound through the insulating material 32. Thus, deformation and cracking of the stator plates 24 made of the amorphous alloy material or the nanocrystalline soft magnetic material, which is weak and thin to about several tens of micrometers, can be prevented. Thus, a motor using the amorphous alloy material plate or the nanocrystalline soft magnetic material plate, which has less iron loss and a thickness of several tens of micrometers (thin to about 1 / 10 of the prior art), can be obtained, and the effect of high efficiency of the motor can be sufficiently ensured.

[0065] Further, the motor portion 2 is provided with the annular members 34a, 34b at both end portions of the stator 10 formed by connecting the divided stator blocks 21, and the stator 10 is sandwiched and fixed by the annular members 34a, 34b. The annular members 34a, 34b are fixed to the closed container 1 of the compressor by welding or heat fitting, and thus the stator 10 is not subjected to strong compressive stress as when the stator 10 is directly fixed to the closed container 1 by welding or heat fitting.

[0066] Thus, even if the stator plates 24 of the stator 10 of the motor 2 are formed of the weak amorphous alloy material or the nanocrystalline soft magnetic material and are thin to about several tens of micrometers, deformation of the stator plates 24 can be prevented, and thus the efficiency of the motor 2 can be prevented from decreasing. In addition, the laser irradiation time and heat adjustment required for welding are not required, and thus the efficiency can be prevented from decreasing due to deviation of these adjustments.

[0067] In addition, the outer diameter of the stator 10 is smaller than the outer diameter of the annular members 34a, 34b sandwiching and fixing the stator 10. Thus, the annular members 34a, 34b receive the compressive stress in the diameter-reducing direction due to thermal contraction of the closed container 1 or the like, and the compressive stress applied to the stator 10 of the motor portion 2 can be suppressed or eliminated.

[0068] Thus, stress damage of the stator plates 24 of the stator 10 can also be prevented, and a high-performance compressor in which the performance efficiency of the amorphous alloy material or the nanocrystalline soft magnetic material is sufficiently exhibited can be formed.

[0069] In addition, although the stator material plate 25 made of the amorphous alloy material or the nanocrystalline soft magnetic material is expensive, according to the present application, the stator material plate 25 can be used for the stator 10 of the motor portion 2, and thus the cost of the compressor can be reduced. Figure 7As described above, by performing the mold press forming in a manner that the tooth portions 23 are opposed (facing each other), the stator plates 24 can be taken out from the strip-shaped stator material plate 25 without waste. For example, if the stator 10 is not composed of the divided stator blocks 21 but is in a structure continuously in one annular shape, the stator plates 24 constituting it become in an annular shape (ring shape), and the material of the central portion of the ring is wasted, thus causing a large waste in the use of the material. However, if the stator 10 is formed as a link of the divided stator blocks 21, the stator plates 24 constituting it are arranged in a manner that the tooth portions 23 of the stator plates 24 are opposed and are subjected to the mold press forming. Thus, the waste in the use of the material can be almost eliminated, and the increase in the manufacturing cost of the stator 10 can be greatly suppressed.

[0070] Further, the pin shaft 36 of the one annular member 34a provided in the above-described compressor is inserted in the concave groove 29 of the outer periphery of the stator 10. Thus, even if the stator 10 of the motor portion 2 is not fixed by the shrink fitting, the welding, or the like, the rotation of the stator 10 can be prevented, the decrease in the efficiency can be suppressed, and a high-performance compressor can be obtained.

[0071] [1-3. Effects, etc.]

[0072] As described above, the motor disclosed in the present embodiment includes the rotor 11 and the stator 10 that rotates the above-described rotor 11, the above-described stator 10 is composed by linking a plurality of divided stator blocks 21, and further, the above-described divided stator blocks 21 are formed by folding and stacking a plurality of stator plates 24 formed in a manner that the yoke portions 22 and the tooth portions 23 are continuously linked in one body.

[0073] Thus, when the stacking of the stator plates 24 is performed, the complicated and time-consuming process of aligning the shapes of the respective stator plates 24 that are separated in dispersion and stacking and adhering them can be reduced, and when the stator plates 24 are formed, the process of joining the yoke portions 22 and the tooth portions 23 is also not required. Thus, the stacking process can be greatly simplified, the reduction in the manufacturing cost can be achieved, and an inexpensive motor and a compressor using it can be constituted.

[0074] Further, in the above-described structure, at least a part of the stator plates 24 or all of the stator plates 24 constituting the above-described divided stator blocks 21 are formed of a thin plate of an amorphous alloy material or a nanocrystalline material, the reduction in the manufacturing cost can be achieved, and a high-performance motor and a compressor using it can be formed at an inexpensive price.

[0075] Further, in each of the above-described structures, the above-described stator plates 24 are formed in a manner that long holes 30 are provided at appropriate positions of the respective stator plates 24 in the stator plate folding direction. Thus, the stacking deviation of the stator plates can be suppressed by a simple method.

[0076] (Embodiment 2)

[0077] Figure 11 is a longitudinal sectional view showing the motor portion of the compressor of Embodiment 2.

[0078] [2-1. Structure]

[0079] The compressor of the present embodiment adopts a structure in which a step portion integrally formed in the inner peripheral surface of the closed container 1 is used in place of at least one of the annular members 34a, 34b.

[0080] That is, a structure is adopted in which an annular step portion la is integrally formed in the lower portion of the closed container 1, the lower end portion of the stator 10 of the motor portion 2 is placed on the step portion la, and the annular member 34a is further inserted in the upper end portion side of the stator 10, and the heat fitting is performed in the state in which the stator 10 is slightly pressed against the step portion la in the closed container 1 to be fixed.

[0081] [2-2. Action, Effect, etc.]

[0082] The motor of the present embodiment configured in the above-described manner can obtain the same action and effect as those of Embodiment 1, and further can obtain the following effects.

[0083] That is, in the present embodiment, the stator 10 of the motor portion 2 is sandwiched and fixed by the step portion la provided in the inner peripheral surface of the closed container and the annular member 34a fixed to the inner peripheral surface. Therefore, it is possible to eliminate one annular member to be fixed to the closed container 1, and it is possible to further promote the improvement of the yield and the reduction of the manufacturing cost.

[0084] (Embodiment 3)

[0085] Figure 12 is a plan view of a stator material plate forming a stator of the compressor of Embodiment 3, Figure 13 is a perspective view of a stator configured by laminating stator plates molded from the stator material plate in Embodiment 3, Figure 14 is a plan view (top view) showing a state in which the stator is heat fitted in the closed container of the compressor in Embodiment 3.

[0086] [3-1. Structure]

[0087] The compressor of the present embodiment is a structure in which the stator 10 is directly heat fitted in the closed container 1 without using the annular members 34a, 34b.

[0088] That is, a structure is adopted in which a slight protrusion 38 protruding outwardly of the outermost peripheral edge of the yoke portion 22 is formed on the outer edge side of the folded portion 26 of the stator plate 24 molded from the stator material plate 25, and the Figure 13The minute protrusions 38 shown protruding from the outer peripheral surface of the divided stator block 21 are, as shown Figure 14 are fixed in the closed container 1 as shown.

[0089] In the above, the minute protrusions 38 need not be formed in all of the divided stator blocks 21, but can be formed in several of the divided stator blocks 21.

[0090] [3-2. Operation, Effects, etc.]

[0091] The compressor of the present embodiment configured as described above does not require the use of the annular members 34a, 34b described in Embodiment 1. In addition, because the minute protrusions 38 provided to the folded portions 26 are strengthened by work hardening, deformation and the like can be suppressed even if subjected to the compression pressure from the closed container 1. Furthermore, because the minute protrusions 38 are located at a portion of the both side portions of the yoke portion 22, even if there is some deformation and the like, the influence on the magnetic characteristics of the entire yoke portion is small. Thus, the degradation of the magnetic characteristics due to the compression pressure from the closed container 1 is small, and the reduction in the efficiency of the motor can be suppressed and the simplification of the structure is promoted.

[0092] (Other Embodiments)

[0093] As described above, Embodiments 1 and 2, 3 are described as examples of the technology described in the present application. However, the technology of the present application is not limited to this, and can be applied to embodiments in which changes, substitutions, additions, omissions, and the like are made.

[0094] For example, the motor is described as an inner rotor type motor, but can also be an outer rotor type motor.

[0095] In addition, the stator plates 24 that constitute the divided stator blocks 21 of the stator 10 are formed of amorphous alloy material or nanocrystalline soft magnetic material, but can also be stator plates formed of electromagnetic steel plates and the like, and folding and stacking the stator plates formed of electromagnetic steel plates and the like can also achieve the simplification of the stacking process.

[0096] In addition, in the present embodiment, the two end surface portions in which the stator plates formed of amorphous alloy material or nanocrystalline soft magnetic material are folded and stacked are described, and a structure in which the stator plates 24 formed of electromagnetic steel plates are folded and stacked, that is, a combination structure of the stator plates 24 formed of amorphous alloy material or nanocrystalline soft magnetic material and the stator plates 24 formed of electromagnetic steel plates. However, the stator 10 can also be formed only of the stator plates 24 formed of amorphous alloy material or nanocrystalline soft magnetic material. Furthermore, in the case where the stator plates 24 formed of electromagnetic steel plates are used in combination, the stacking of the stator plates formed of electromagnetic steel plates and the like can also be performed during the stacking process of the stator plates 24 formed of amorphous alloy material or nanocrystalline soft magnetic material.

[0097] Further, the compressor is described as having a rotary compression mechanism, but can also be a scroll-type, reciprocating-type, screw-type, or the like, and can be applied to various types of compressors.

[0098] That is, the entire contents of the embodiments described in the present specification are illustrative and not restrictive, and the scope of the present application is indicated by the scope of the claims, and includes all changes within the meaning and range equivalent to the scope of the claims.

[0099] Industrial applicability

[0100] As described above, the present application can greatly simplify the stacking process of the divided stator blocks that make up the stator, can reduce manufacturing costs, and can provide an inexpensive motor and a compressor using the same. Thus, the present application can be used as a compressor for a refrigeration system of various devices such as an air conditioner, a refrigerator, a blower, a water heater, etc., and a motor that drives the compressor.

[0101] Explanation of reference numerals

[0102] 1 closed container

[0103] 1a step portion

[0104] 2 motor portion (motor)

[0105] 3 compression mechanism portion

[0106] 4 drive shaft

[0107] 5 housing

[0108] 6 upper cover

[0109] 7 lower cover

[0110] 8 terminal

[0111] 9 oil sump

[0112] 10 stator

[0113] 11 rotor

[0114] 12 upper bearing member

[0115] 13 lower bearing member

[0116] 14 drive shaft eccentric portion

[0117] 15 cylinder

[0118] 16 rolling piston

[0119] 17 discharge pipe

[0120] 18 liquid accumulator

[0121] 19 suction connection pipe

[0122] 20 refrigerant gas introduction pipe

[0123] 21 split stator block

[0124] 21a circumferential direction both side portions

[0125] 22 yoke portion

[0126] 23 tooth portion

[0127] 24 stator plate

[0128] 24a stator plate portion

[0129] 25 stator material plate

[0130] 26 connecting portion (folding portion)

[0131] 27 acute angle recessed portion

[0132] 28 obtuse angle recessed portion

[0133] 29 concave groove

[0134] 30 long hole

[0135] 31 reinforcing plate

[0136] 32 insulating material

[0137] 33 winding

[0138] 34a, 34b ring-shaped member

[0139] 36 pin shaft

[0140] 37 hole

[0141] 38 minute protrusion

Claims

1. An electric motor including a rotor and a stator that rotates the rotor, the stator being constructed by arranging a plurality of divided stator blocks in a circular shape, the electric motor characterized by: the divided stator blocks being formed by folding and stacking a plurality of stator plates that are integrally provided with yoke portions and tooth portions and are continuously linked, wherein the yoke portions are arranged in a circular shape in contact with other divided stator blocks, the tooth portions protrude in a radial direction from the yoke portions, in a state in which the stator plates are connected to each other in a strip-like stator material plate, the stator plates are connected to each other at both sides of the yoke portions, acute-angle recesses and obtuse-angle recesses are formed at inner and outer edges of the connected portions of the yoke portions, the connected portions are made to have a width that is narrower than a width of the yoke portions by the acute-angle recesses and the obtuse-angle recesses, in a state in which the divided stator blocks are linked in a circular ring shape, recessed grooves are formed by adjacent obtuse-angle recesses.

2. The electric motor according to claim 1, characterized by: at least a part of the stator plates or all of the stator plates that constitute the divided stator blocks are formed of a thin plate of an amorphous alloy material or a nanocrystalline material.

3. The electric motor according to claim 1, characterized by: long holes are provided in appropriate portions of each of the stator plates in a stator plate folding direction.

4. The electric motor according to claim 2, characterized by: long holes are provided in appropriate portions of each of the stator plates in a stator plate folding direction.

5. A compressor that houses a compression mechanism portion and an electric motor portion that drives the compression mechanism portion in a closed container, the compressor characterized by: a stator of the electric motor portion is the stator of the electric motor according to claim 1 or 3.

6. The compressor according to claim 5, characterized by: the stator plates that constitute the stator are provided with slight protrusions that protrude outward from an outermost peripheral edge of the yoke portions at folded portions of the stator plates.

7. A compressor that houses a compression mechanism portion and an electric motor portion that drives the compression mechanism portion in a closed container, the compressor characterized by: a stator of the electric motor portion is the stator of the electric motor according to claim 2 or 4.

8. The compressor according to claim 7, characterized by: the stator plates that constitute the stator are provided with slight protrusions that protrude outward from an outermost peripheral edge of the yoke portions at folded portions of the stator plates.

9. The compressor according to claim 7 or 8, characterized by: fixed plates formed of electromagnetic steel plates are arranged at both end surfaces of the stator that is constructed by magnetically coupling the divided stator blocks formed of the amorphous alloy material or the nanocrystalline material, an outer diameter of the fixed plates or at least a part of the outer diameter is larger than an outermost peripheral outer diameter of the stator formed of the amorphous alloy material or the nanocrystalline material.

10. The compressor according to claim 9, characterized by: at least one of the fixed plates is replaced by a stepped portion provided at an inner peripheral surface of the closed container.

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