Magnetic components, motors, motor modules, compressors, refrigeration equipment

Abstract

This technology provides a simple way to suppress the thermal effects on an object. [Solution] A stator core 31 according to one embodiment of the present disclosure comprises a stator core body 33 as a laminate formed by laminating steel plates containing an amorphous soft magnetic material or a nanocrystalline soft magnetic material with an adhesive resin in between, and a resin 34, wherein the resin 34 is arranged on the surface of the stator core body 33 in a direction perpendicular to the lamination direction of the steel plates, the adhesive resin in the stator core body 33 and the resin 34 are of the same type, and their melting temperature or decomposition temperature is lower than the crystallization temperature of the steel plates in the stator core body 33.

Description

Technical Field

[0001] The present disclosure relates to a magnetic member and the like.

Background Art

[0002] Conventionally, in order to suppress the influence of heat from the surface on an object, a heat-resistant part having a property of being altered at a temperature higher than the temperature assumed by heat is disposed on the surface of the object (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, for example, when providing a heat-resistant part, the structure may become complicated, leading to an increase in the man-hours and processes during the manufacture of a product including the object, and an increase in cost.

[0005] An object of the present disclosure is to provide a technique capable of simply suppressing the influence of heat on an object.

Means for Solving the Problems

[0006] In a first aspect of the present disclosure, a laminate (33, 43) in which a steel sheet containing an amorphous soft magnetic material or a nanocrystalline soft magnetic material is laminated with a first resin interposed therebetween, and a second resin (34, 45) are provided, the second resin (34, 45) is disposed on a surface of the laminate (33, 43) in a direction orthogonal to the lamination direction of the laminate (33, 43), the first resin and the second resin (34, 45) are of the same type of resin and have a melting temperature or a decomposition temperature lower than the crystallization temperature of the steel sheet. A magnetic component is provided.

[0007] According to this embodiment, the magnetic member can melt or decompose the first and second resins at a temperature lower than the crystallization temperature of the steel sheets when there is a heat influence from the surface on a laminate in which steel sheets containing amorphous soft magnetic material or nanocrystalline soft magnetic material are laminated with a first resin in between. Therefore, the magnetic member can suppress the temperature rise of the steel sheets by the endothermic effect caused by the melting and decomposition of the first and second resins, and as a result, suppress the crystallization of the steel sheets. Thus, the magnetic member can easily suppress the heat influence on the laminate of steel sheets containing amorphous soft magnetic material or nanocrystalline soft magnetic material.

[0008] Furthermore, a second aspect of this disclosure, based on the first aspect described above, The first resin and the second resin (34, 45) may include epoxy resin, acrylic resin, varnish, polyphenylene sulfide, liquid crystal polymer, polybutylene terephthalate, or polyethylene terephthalate.

[0009] Furthermore, in a third aspect of this disclosure, based on the first or second aspect described above, The first resin and the second resin (34, 45) may be integrated into one.

[0010] Furthermore, a fourth aspect of this disclosure, based on the first or second aspect described above, The first resin and the second resin (34, 45) may be separate components.

[0011] Furthermore, the fifth aspect of this disclosure is based on any one of the first to fourth aspects described above, The first resin and the second resin (34, 45) do not need to contain additives.

[0012] Furthermore, in the sixth aspect of this disclosure, A rotor (40) that can rotate around its axis of rotation, The rotor (40) and the stator (30) are arranged radially opposite each other, The stator (30) or rotor (40) includes a core (31, 41), The core (31, 41) is a magnetic member according to any one of the first to fifth embodiments described above. A motor is provided.

[0013] Furthermore, the seventh aspect of this disclosure is based on the sixth aspect described above, The rotor (40) includes a rotor core (41) and a cylindrical protective tube (44) that covers the outer circumferential surface of the rotor core (41). The core is the rotor core (41), The second resin (45) of the rotor core (41) may be disposed between the surface of the rotor core (41) and the inner circumferential surface of the protective tube (44).

[0014] Furthermore, the eighth aspect of this disclosure is based on the seventh aspect described above, A space may be provided between the laminate (43) of the rotor core (41) and the inner circumferential surface of the protective tube (44) that is adjacent to the second resin (45) and communicates with the outside of the rotor core (41).

[0015] Furthermore, in the ninth aspect of this disclosure, A motor (20) described in any one of the sixth to eighth embodiments described above, The system comprises a housing (60) that houses the motor inside, The stator (30) includes a stator core (31), The core is the stator core (31), The second resin (34) of the stator core (31) is disposed between the surface of the stator core (31) and the inner surface of the housing (60). A motor module is provided.

[0016] Furthermore, the tenth aspect of this disclosure is based on the ninth aspect described above, A space (SP1, SP2, SP3, SP4) may be provided between the laminate (33) of the stator core (31) and the inner surface of the housing (60), adjacent to the second resin (34) of the stator core (31) and communicating with the outside of the stator core (31).

[0017] Also, in the 11th aspect of the present disclosure, the motor module (10) according to the above-described 9th or 10th aspect, and a compression mechanism part (110) that is driven by the motor (20) and stored inside the housing (60) are provided. A compressor is provided.

[0018] Also, in the 12th aspect of the present disclosure, A refrigerator provided with the compressor (100) according to the above-described 11th aspect. A refrigeration device is provided.

Advantages of the Invention

[0019] According to the above-described embodiment, the influence of heat on the object can be simply suppressed.

Brief Description of the Drawings

[0020] [Figure 1] It is a cross-sectional view showing a first example of a motor module. [Figure 2] It is a cross-sectional view showing a first example of a motor module. [Figure 3] It is a cross-sectional view showing a second example of a motor module. [Figure 4] It is a cross-sectional view showing a third example of a motor module. [Figure 5] It is a cross-sectional view showing a fourth example of a motor module. [Figure 6] It is a cross-sectional view showing a fifth example of a motor module. [Figure 7] It is a cross-sectional view showing a sixth example of a motor module. [Figure 8] It is a cross-sectional view showing a seventh example of a motor module. [Figure 9] This is a cross-sectional view showing the eighth example of a motor module. [Figure 10] This is a cross-sectional view showing the eighth example of a motor module. [Figure 11] This is a diagram showing an example of a refrigeration system. [Modes for carrying out the invention]

[0021] The embodiments will be described below with reference to the drawings.

[0022] [First example of a motor module] A first example of the motor module 10 according to this embodiment will be described with reference to Figures 1 and 2.

[0023] Figures 1 and 2 are cross-sectional views showing a first example of the motor module 10. Specifically, Figure 1 is a cross-sectional view of the first example of the motor module 10, taken from a plane perpendicular to the rotation axis AX, and Figure 2 is a cross-sectional view of the first example of the motor module 10, taken from a plane including the rotation axis AX.

[0024] Hereinafter, the axial, radial, and circumferential directions, with respect to the rotational axis AX, may simply be referred to as "axial direction," "radial direction," and "circumferential direction," respectively.

[0025] Note that, for convenience, the rotor 40 is omitted from the illustration in Figure 2.

[0026] As shown in Figure 1, the motor module 10 includes a motor 20 and a housing 60.

[0027] The motor (also called a "rotating electric machine" or "rotary electric motor") 20 is a so-called radial gap type and includes a stator 30 and a rotor 40 that face each other radially with an air gap between them.

[0028] The stator (also called the "fixator") 30 is the armature and is positioned radially outward of the rotor 40, facing the rotor 40 in the radial direction. The stator 30 includes a stator core 31 and a plurality of coils 32.

[0029] The stator core (also called the "stator iron core") 31 includes a stator core body 33 and a resin 34.

[0030] The stator core body 33 functions as a magnetic path for the magnetic flux caused by the current flowing through the coil 32 and the magnetic flux of the permanent magnets 42 of the rotor 40.

[0031] The stator core body 33 is a laminate formed by laminating steel plates containing amorphous soft magnetic material or nanocrystalline soft magnetic material with an adhesive resin in between. The adhesive resin layer between adjacent steel plates may be of the same type throughout the entire stator core body 33, or a different type of resin may be used in some layers. For example, a minimum unit laminate is formed by laminating a certain number of steel plates with an adhesive resin in between, and then the stator core body 33 is finally manufactured by laminating multiple minimum unit laminates with adhesive resin in between. In this case, the adhesive resin used when manufacturing the minimum unit laminate may be different from the adhesive resin used when manufacturing the final stator core body 33 from multiple minimum unit laminates.

[0032] Amorphous soft magnetic materials and nanocrystalline soft magnetic materials include, for example, at least one magnetic metal selected from the group consisting of iron, cobalt, and nickel, and at least one non-magnetic metal. In this case, the at least one non-magnetic metal is selected from the group consisting of, for example, boron, carbon, phosphorus, aluminum, silicon, titanium, vanadium, chromium, manganese, copper, yttrium, zirconium, niobium, molybdenum, hafnium, tantalum, and tungsten.

[0033] Amorphous soft magnetic materials and nanocrystalline soft magnetic materials are produced using materials such as iron-cobalt alloys, iron-nickel alloys, iron-aluminum alloys, iron-silicon alloys, iron-tantalum alloys, or iron-zirconium alloys. In this case, iron-cobalt alloys include, for example, Fe·Co alloys and Fe·Co·V alloys. Iron-nickel alloys include, for example, Fe·Ni alloys, Fe·Ni·Mo alloys, Fe·Ni·Cr alloys, and Fe·Ni·Si alloys. Iron-aluminum alloys and iron-silicon alloys include, for example, Fe·Al alloys, Fe·Al·Si alloys, Fe·Al·Si·Cr alloys, Fe·Al·Si·Ti·Ru alloys, and Fe·Al·O alloys. Iron-tantalum alloys include, for example, Fe·Ta alloys, Fe·Ta·C alloys, and Fe·Ta·N alloys. Iron-zirconium alloys include, for example, Fe·Zr·N alloys.

[0034] Furthermore, amorphous soft magnetic materials or nanocrystalline soft magnetic materials are, for example, cobalt alloys containing at least one element from the group consisting of zirconium, hafnium, niobium, tantalum, titanium, and yttrium in addition to cobalt. In this case, the cobalt alloy contains, for example, 80 at% or more cobalt. This is because cobalt alloys containing 80 at% or more cobalt tend to become amorphous when formed into films. Also, cobalt alloys containing 80 at% or more cobalt have low crystalline magnetic anisotropy, fewer crystalline defects and grain boundaries, and possess excellent magnetic properties. Examples of cobalt alloys used as materials for amorphous soft magnetic materials include Co·Zr alloys, Co·Zr·Nb alloys, and Co·Zr·Ta alloys.

[0035] Amorphous soft magnetic materials have an amorphous structure as their main structure. When observing the X-ray diffraction pattern of amorphous soft magnetic materials, they do not have clear peaks in the X-ray diffraction pattern. When observing the X-ray diffraction pattern of amorphous soft magnetic materials, they have a broad halo pattern.

[0036] Nanocrystalline soft magnetic materials are formed by applying heat treatment to amorphous soft magnetic materials that have an amorphous structure. Specifically, nanocrystalline soft magnetic materials are soft magnetic materials in which nanocrystals are deposited by heat treatment of amorphous soft magnetic materials. Nanocrystalline soft magnetic materials have a nanocrystalline structure. Nanocrystals are polycrystalline materials with a particle size ranging from several nanometers to tens of nanometers.

[0037] When observing the X-ray diffraction pattern of nanocrystalline soft magnetic materials, X-ray diffraction peaks are observed at positions corresponding to the lattice spacing of the crystal planes. The crystallite size can be calculated from the width of the X-ray diffraction peaks using Scherrer's formula. A nanocrystal is defined as a material whose crystallite size, calculated from the full width at half maximum (FWHM) of the X-ray diffraction peaks using Scherrer's formula, is less than 1 micrometer. The crystallite size of a nanocrystal (for example, the crystallite size calculated from the FWHM of the X-ray diffraction peaks using Scherrer's formula) is preferably 100 nanometers or less, and more preferably 50 nanometers or less. Furthermore, the crystallite size of a nanocrystal is preferably 5 nanometers or more.

[0038] As mentioned above, since nanocrystalline soft magnetic materials have a crystallite size of 100 nanometers or less, they can improve the magnetic properties of the stator core 31.

[0039] Furthermore, the crystallite size of conventional electrical steel sheets is on the order of micrometers, and is generally 50 micrometers or larger.

[0040] Amorphous soft magnetic materials and nanocrystalline soft magnetic materials are known to crystallize when heated to a temperature above their crystallization temperature, through the formation of crystal nuclei and the growth of crystal grains (specifically, grain coarsening). The crystallization temperature for amorphous soft magnetic materials and nanocrystalline soft magnetic materials is, for example, about 400°C.

[0041] The stator core body 33 includes a back yoke portion 33A having a substantially cylindrical shape centered on the rotation axis AX, and a plurality of teeth portions 33B (six in this example) protruding radially inward from the inner circumferential surface of the back yoke portion 33A. The term "subjective" regarding arrangement, shape, etc., is intended to allow for manufacturing errors (tolerances), and is used in the same sense hereafter.

[0042] Multiple teeth portions 33B are arranged at approximately equal intervals in the circumferential direction on the inner circumference side of the back yoke portion 33A.

[0043] The resin 34 is arranged adjacent to the outer circumferential surface of the stator core body 33. The outer circumferential surface of the stator core body 33 corresponds to the surface in a direction perpendicular to the lamination direction of the steel plate (in this example, the axial direction) (in this example, the radially outward side).

[0044] For example, as shown in Figure 1, the resin 34 is arranged so as to be adjacent to the outer circumferential surface of the stator core body 33 over the entire circumference (i.e., the entire circumference). Alternatively, the resin 34 may be arranged only on a portion of the outer circumferential surface of the stator core body 33.

[0045] Furthermore, as shown in Figure 2, for example, the resin 34 is arranged adjacently across the entire axial direction of the outer circumferential surface of the stator core body 33. Alternatively, the resin 34 may be arranged adjacently only to a portion of the axial direction of the outer circumferential surface of the stator core body 33.

[0046] The melting temperature (also called the "melting temperature") or decomposition temperature of the resin 34 is lower than the crystallization temperature of the steel plate in the stator core body 33. As a result, when heat is generated from the outer surface side of the stator core body 33, the resin 34 melts or decomposes before the steel plate of the stator core body 33 crystallizes, and the heat absorption effect at that time suppresses the thermal impact on the steel plate of the stator core body 33. Therefore, it is possible to suppress changes in the properties of the stator core body 33 due to crystallization of the stator core body 33.

[0047] Furthermore, in an atmosphere with a relatively high oxygen content, such as the atmosphere at ground pressure (hereinafter referred to as "oxygen atmosphere"), the decomposition reaction is accompanied by an exothermic reaction (i.e., a combustion reaction), which may prevent the suppression of thermal effects on the steel plate of the stator core body 33. Therefore, when a resin 34 with a decomposition temperature lower than the crystallization temperature of the steel plate in the stator core body 33 is used, care is taken to ensure that the resin 34 is in an atmosphere different from the oxygen atmosphere in situations where thermal effects on the stator core body 33 may occur. For example, if temporary thermal effects occur during the manufacturing process of the motor module 10, the manufacturing process is carried out in an atmosphere different from the oxygen atmosphere. An atmosphere different from the oxygen atmosphere includes, for example, a nitrogen atmosphere. In addition, an atmosphere different from the oxygen atmosphere includes, for example, an atmosphere reduced from atmospheric pressure or a vacuum atmosphere.

[0048] The melting temperature of resin 34 is, for example, the melting onset temperature of resin 34. The melting onset temperature is determined, for example, based on the measurement method specified in the Japanese Industrial Standards (JIS) "Method for Measuring Transition Temperature of Plastics" (K 7121-1987). The same applies to the melting temperature of resin 45 described later. Resin 34 includes, for example, at least one of polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polybutylene terephthalate (PBT), and polyethylene terephthalate (PET), as a resin material with a melting temperature lower than the crystallization temperature of the steel plate of the stator core body 33.

[0049] The decomposition temperature of resin 34 is, for example, the decomposition initiation temperature of resin 34. The decomposition initiation temperature is, for example, the temperature at which mass reduction begins (the primary initiation temperature as the temperature at which the first mass reduction begins if mass reduction occurs in multiple stages) determined based on the measurement method specified in the Japanese Industrial Standard (JIS) "Thermogravimetric Analysis Method for Plastics" (K 7121-1987). The same applies to the decomposition temperature of resin 45 described later. Resin 34 includes, for example, at least one of epoxy resin, acrylic resin, and varnish as a resin material with a decomposition temperature lower than the crystallization temperature of the steel plate of the stator core body 33.

[0050] Generally speaking, the amount of heat absorbed during thermal decomposition is greater than that absorbed during thermal melting.

[0051] Furthermore, the resin 34 is the same type of resin as the adhesive resin used in the stator core body 33, which is a laminate of steel plates. As described above, if two or more types of resins are used as the adhesive resin in the stator core body 33, which is a laminate of steel plates, the resin 34 may be the same type of resin as any one of them.

[0052] Furthermore, the same type of resin 34 and adhesive resin are formed, for example, solely from resin material. In other words, it is preferable that the resin 34 and adhesive resin do not contain additives such as inorganic fillers. If inorganic fillers are not included, the thickness of the adhesive resin layer in the laminate of steel plates is not constrained by the particle size of the inorganic fillers, and as a result, the thickness of the adhesive resin layer in the stator core body 33 can be reliably reduced to the desired extent.

[0053] For example, the resin 34 is integral with the adhesive resin used to bond the stator core body 33, which is a laminate of steel plates. In this case, by intentionally allowing the adhesive resin of the stator core body 33 to protrude outwards, the protruding portion of the adhesive resin can function as resin 34. This eliminates the need for a separate process to arrange resin 34 during the manufacturing of the motor module 10, for example, simplifying the manufacturing process and reducing costs. However, resin 34 may be provided separately from the adhesive resin in the stator core body 33, which is a laminate of steel plates.

[0054] Multiple coils (also called "windings") 32 are wound around each of the multiple tooth sections 33B by concentrated winding. An insulating material, such as an insulating film made of PET (Polyethylene Terephthalate), is interposed between the coils 32 and the tooth sections 33B.

[0055] For example, the motor 20 is driven by a three-phase AC current consisting of U-phase, V-phase, and W-phase, and the six coils 32 each include two coils for the U-phase, V-phase, and W-phase.

[0056] Furthermore, the coil 32 may be wound in a distributed winding manner so as to span two or more tooth sections 33B.

[0057] The rotor (also called the "rotor") 40 is a field magnet and is positioned radially inward, facing the stator 30, and is mounted on the rotation shaft 50, and can rotate around the rotation axis AX. The rotor 40 includes a rotor core 41 and a plurality of permanent magnets 42.

[0058] The rotor core (also called the "rotor iron core") 41 functions as a magnetic path for the magnetic field caused by the current flowing through the coils 32 of the stator 30 and the magnetic field of the permanent magnets 42. The rotor core 41 includes a rotor core body 43 formed from a soft magnetic material such as electromagnetic steel sheet or compacted magnetic core.

[0059] The rotor core body 43 has a cylindrical shape centered on the rotation axis AX, and is provided with a through hole that penetrates axially, also centered on the rotation axis AX. The rotation shaft 50 is inserted through and fixed in the through hole. As a result, the rotor 40 can rotate together with the rotation shaft 50.

[0060] The permanent magnet 42 generates a magnetic field that links with the coil 32 of the stator 30. The permanent magnet 42 is, for example, a ferrite magnet, an alnico magnet, a neodymium magnet, etc.

[0061] Multiple permanent magnets 42 are arranged at equal intervals in the circumferential direction within the rotor core body 43. In this example, the multiple permanent magnets 42 are embedded inside the rotor core body 43. That is, in this example, the motor 20 is a so-called interior permanent magnet (IPM) motor. Specifically, holes (also called "magnet slots") are formed in the rotor core body 43 along the axial direction, and the permanent magnets 42 are embedded inside the rotor core body 43 by being inserted into these holes.

[0062] In this example, the permanent magnet 42 has an elongated rectangular shape (specifically, one side is sufficiently longer than the other) when viewed in the direction along the rotation axis AX. The permanent magnet 42 is positioned such that, when viewed in the direction along the rotation axis AX, its longer side is approximately perpendicular to the radial direction (i.e., its shorter side is aligned with the radial direction) at a predetermined circumferential position. The permanent magnet 42 is magnetized in the direction of its shorter side (i.e., the radial direction), and is positioned such that the polarity of its magnetic poles (N pole or S pole) at both ends in the direction of its shorter side is different from that of other permanent magnets 42 adjacent to it in the circumferential direction.

[0063] In this example, spaces that function as flux barriers may be formed at both ends of the permanent magnet 42 in the long-side direction within the rotor core body 43. The shape of the permanent magnet 42 is arbitrary; for example, it may be formed in a curved shape in the long-side direction, or it may be composed of multiple magnetic members. The motor 20 may also be a surface permanent magnet (SPM) motor. In this case, the rotor core 41 (specifically, the rotor core body 43) may be omitted.

[0064] In this example, the motor 20 has a 4-pole, 6-slot configuration consisting of a combination of 6 coils 32 and 4 permanent magnets 42.

[0065] In this example, the motor 20 may have a configuration different from the 4-pole, 6-slot configuration. Specifically, the number of coil slots, i.e., the number of coils 32, may be 5 or less, or 7 or more. Also, the number of poles, i.e., the number of permanent magnets 42, may be 3 or less, or 5 or more.

[0066] The housing 60 houses the motor 20. For example, as shown in Figure 2, the housing 60 has a substantially cylindrical shape, the stator 30 of the motor 20 is fixed to the housing 60, and a resin 34 is placed between the housing 60 and the stator core body 33.

[0067] For example, the housing 60 and the stator core 31 are joined by shrink-fitting. The temperature of the housing 60 during shrink-fitting reaches, for example, about 400°C. Therefore, during the shrink-fitting process, the high temperature of the housing 60 acts on the outer surface of the stator core body 33. At this time, the resin 34 melts or decomposes before the steel plate of the stator core body 33 reaches its crystallization temperature. As a result, the endothermic effect of the resin 34 during melting or decomposition suppresses the crystallization of the steel plate of the stator core body 33, and consequently, changes (specifically deterioration) in the properties of the stator core body 33 can be suppressed.

[0068] [Second example of a motor module] Referring to Figure 3, a second example of the motor module 10 according to this embodiment will be described.

[0069] In this example, the same reference numerals are used for components that are the same as or corresponding to the first example of the motor module 10 described above. The explanation will focus on the parts that differ from the first example, and the explanation of parts that are the same as or corresponding to the first example may be omitted. The same approach will be taken for the third to eighth examples described later, in relation to the examples of the motor module 10 that have already been explained.

[0070] Figure 3 is a cross-sectional view showing a second example of the motor module 10. Specifically, Figure 3 is a cross-sectional view of a second example of the motor 20, taken from a plane perpendicular to the rotation axis AX.

[0071] Note that, for convenience, the rotor 40 is omitted from Figure 3. The same applies to Figures 4 to 7, which will be discussed later.

[0072] As shown in Figure 3, the motor module 10 in this example differs from the first example described above in the configuration of the stator core 31.

[0073] A concave groove 33C is provided on the outer circumferential surface of the stator core body 33 (specifically, the outer circumferential surface of the back yoke portion 33A). The groove 33C is provided in the axial direction over a range that includes at least one of the ends of the stator core body 33.

[0074] The shape, number, and circumferential placement of the grooves 33C are arbitrary. For example, as shown in Figure 3, the grooves 33C are provided in the circumferential direction at the positions where the teeth 33B are provided on the outer surface of the stator core body 33, and have a V-shaped cross-section such that the width in the circumferential direction narrows toward the radially inward direction.

[0075] The resin 34 is arranged adjacent to the outer circumferential surface of the stator core body 33 over a predetermined range adjacent to the area where the grooves 33C are provided. For example, as shown in Figure 3, the resin 34 is arranged adjacent to the outer circumferential surface of the stator core body 33 over the entire range where grooves 33C are not provided between adjacent grooves 33C on the outer circumferential surface of the stator core body 33. This makes it possible to provide a space SP1 between the grooves 33C and the housing 60 that is adjacent to the resin 34 and communicates with the outside of the stator core 31 in the axial direction. Therefore, for example, during shrink-fitting of the housing 60 and the stator core 31, the gas generated when the resin 34 decomposes due to the high temperature heat acting from the housing 60 can be discharged to the outside of the stator core 31 through space SP1.

[0076] [Third example of a motor module] Referring to Figure 4, a third example of the motor module 10 according to this embodiment will be described.

[0077] Figure 4 is a cross-sectional view showing a third example of the motor module 10. Specifically, Figure 4 is a cross-sectional view of the third example of the motor module 10 taken from a plane perpendicular to the rotation axis AX.

[0078] As shown in Figure 4, the motor module 10 in this example differs in the configuration of the stator core 31 from the first and second examples described above.

[0079] A concave groove 33D is provided on the outer circumferential surface of the stator core body 33 (specifically, the outer circumferential surface of the back yoke portion 33A). The groove 33D is provided in the axial direction over a range that includes at least one of both ends of the stator core body 33.

[0080] The shape, number, and circumferential placement of the grooves 33D are arbitrary. For example, as shown in Figure 4, in this example, the grooves 33D are provided in the circumferential direction between the positions where adjacent teeth 33B are provided on the outer surface of the stator core body 33, and have a substantially rectangular cross-sectional shape.

[0081] The resin 34 is provided in a predetermined range in the circumferential direction, including the position where the groove 33D is provided on the outer circumferential surface of the stator core body 33. In other words, the resin 34 is arranged to cover the groove 33D from the radially outside and to be adjacent to the outer circumferential surface of the stator core body 33 in areas where the groove 33D is not provided. For example, as shown in Figure 4, the resin 34 is arranged in an annular shape over the entire circumferential direction (all around), adjacent to the outer circumferential surface of the stator core body 33 in areas where the groove 33D is not provided. This makes it possible to provide a space SP2 between the resin 34 and the surface of the groove 33D that is adjacent to the resin 34 and communicates with the outside of the stator core 31 in the axial direction. Therefore, for example, during shrink-fitting of the housing 60 and the stator core 31, the gas generated when the resin 34 decomposes due to the high temperature heat acting from the housing 60 can be discharged to the outside of the stator core 31 through the space SP2.

[0082] Furthermore, the resin 34 may be provided only in a portion of the circumferential direction, as long as it covers the groove portion 33D from the radially outer side and is positioned adjacent to the outer circumferential surface of the stator core body portion 33 in areas where the groove portion 33D is not provided.

[0083] [Fourth example of a motor module] Referring to Figure 5, a fourth example of the motor module 10 according to this embodiment will be described.

[0084] Figure 5 is a cross-sectional view showing a fourth example of the motor module 10. Specifically, Figure 5 is a cross-sectional view of the fourth example of the motor module 10 taken from a plane perpendicular to the rotation axis AX.

[0085] As shown in Figure 5, the motor module 10 in this example differs from the first to third examples described above in the configuration of the stator core 31.

[0086] The resin 34 includes a groove 33D on its outer circumferential surface adjacent to the housing 60. The groove 33D is provided in the axial direction over a range that includes at least one of both ends of the resin 34. This makes it possible to provide a space SP3 between the inner circumferential surface of the substantially cylindrical housing 60 and the surface of the groove 33D, which is adjacent to the resin 34 and communicates with the outside of the stator core 31 in the axial direction. Therefore, for example, during shrink-fitting of the housing 60 and the stator core 31, the gas generated when the resin 34 decomposes due to the high temperature heat acting from the housing 60 can be discharged to the outside of the stator core 31 through the space SP3.

[0087] Furthermore, the groove 33D may be provided on the inner circumferential surface adjacent to the stator core body 33, instead of on the outer circumferential surface adjacent to the housing 60, or in addition to the outer circumferential surface adjacent to the stator core body 33.

[0088] [Example 5 of a motor module] Referring to Figure 6, a fifth example of the motor module 10 according to this embodiment will be described.

[0089] Figure 6 is a cross-sectional view showing a fifth example of the motor module 10. Specifically, Figure 6 is a cross-sectional view of a fifth example of the motor module 10 taken from a plane perpendicular to the rotation axis AX. Figure 6 includes Figure 6A, which shows the stator core 31 before it is joined to the housing 60, and Figure 6B, which shows the motor module 10 including the stator core 31 after it has been joined to the housing 60.

[0090] As shown in Figure 6, the motor module 10 in this example differs from the first to fourth examples described above in the configuration of the stator core 31.

[0091] The outer circumferential surface of the stator core body 33 (specifically, the outer circumferential surface of the back yoke portion 33A) is formed such that its outer diameter changes in the circumferential direction. For example, in this example, the outer circumferential surface of the stator core body 33 is formed such that its outer diameter is largest at the position where the teeth portion 33B is provided, and smallest at an intermediate position between adjacent teeth portions 33B.

[0092] The resin 34 is provided adjacent to the outer circumferential surface of the stator core body 33, and its radial thickness changes in the circumferential direction. The resin 34 may be provided over the entire circumferential direction (all around) or only over a part of the circumferential direction. In addition, the resin 34 may be provided over the entire outer circumferential surface of the stator core body 33 in the axial direction, or only over a part of it.

[0093] For example, as shown in Figure 6A, the resin 34, before being joined to the housing 60, is positioned adjacent to the outer circumferential surface of the stator core body 33 over its entire circumference, and the diameter of the outer circumferential surface (outer diameter) is constant in the circumferential direction. As a result, during shrink-fitting of the housing 60 and the stator core 31, the high-temperature heat acting from the housing 60 causes the resin 34 to decompose, and the portion with a relatively large radial thickness shrinks relatively large from the radial outside. As a result, as shown in Figure 6B, a space SP4 is created between the shrunk resin 34 and the housing 60, adjacent to the resin 34 and communicating with the outside of the stator core 31 in the axial direction. Therefore, the gas generated when the resin 34 decomposes due to the high-temperature heat acting from the housing 60 can be discharged to the outside of the stator core 31 through the space SP4.

[0094] [Sixth example of a motor module] Referring to Figure 7, a sixth example of the motor module 10 according to this embodiment will be described.

[0095] Figure 7 is a cross-sectional view showing a sixth example of the motor module 10. Specifically, Figure 7 is a cross-sectional view of the sixth example of the motor module 10 taken from a plane perpendicular to the rotation axis AX.

[0096] As shown in Figure 7, the motor module 10 in this example differs from the first to fifth examples described above in the configuration of the stator core 31.

[0097] In this example, in addition to the resin 34, member 70 is arranged adjacent to the outer circumferential surface of the stator core body 33. Specifically, member 70 and resin 34 are arranged to be mixed in the circumferential direction. For example, as shown in Figure 7, assuming that the space SP1 of the second example described above is arranged, the resin 34 and member 70 are arranged alternately in the circumferential direction. Member 70 may be provided over the entire outer circumferential surface of the stator core body 33 in the axial direction, or it may be provided only in a part of it.

[0098] Unlike the resin 34, component 70 is a material that does not melt or decompose due to the high heat from the outer circumferential surface of the stator core body 33. Component 70 is, for example, made of metal. This allows for a more secure joining of the housing 60 and the stator core 31, for example, by shrink-fitting.

[0099] Furthermore, based on the first, third, fourth, or fifth example described above, a configuration in which the resin 34 and the member 70 are mixed in the circumferential direction may be adopted, similar to this example.

[0100] [Seventh example of a motor module] Referring to Figure 8, a seventh example of the motor module 10 according to this embodiment will be described.

[0101] Figure 8 is a cross-sectional view showing a seventh example of the motor module 10. Specifically, Figure 8 is a cross-sectional view of a seventh example of the motor module 10, including the rotation axis AX, in a plane.

[0102] As shown in Figure 8, the motor module 10 in this example differs from the first to sixth examples described above in the configuration of the stator core 31.

[0103] In this example, similar to the sixth example described above, the member 70 is arranged adjacent to the outer circumferential surface of the stator core body 33 in addition to the resin 34. Specifically, unlike the sixth example described above, the member 70 and the resin 34 are arranged to be mixed in the axial direction. For example, as shown in Figure 8, the resin 34 and the member 70 are arranged alternately in the axial direction. The member 70 may be provided over the entire outer circumferential surface of the stator core body 33, or it may be provided only on a part of it.

[0104] Furthermore, the configuration of the stator core 31 when viewed from a direction along the rotation axis AX may be the same as any one of the first to fifth examples described above.

[0105] [Example 8 of a motor module] Referring to Figures 9 and 10, an eighth example of the motor module 10 according to this embodiment will be described.

[0106] Figures 9 and 10 are cross-sectional views showing the eighth example of the motor module 10. Specifically, Figure 9 is a cross-sectional view of the eighth example of the motor module 10, taken from a plane perpendicular to the rotation axis AX, and Figure 10 is a cross-sectional view of the eighth example of the motor module 10, taken from a plane including the rotation axis AX.

[0107] As shown in Figures 9 and 10, the motor module 10 in this example differs from the first to seventh examples described above in the configuration of the stator core 31 and rotor core 41.

[0108] The stator core 31 includes the stator core body portion 33 and, unlike the first to seventh examples described above, does not include the resin 34.

[0109] The stator core body 33 is formed of a soft magnetic material such as an electromagnetic steel sheet or a compacted magnetic core. The soft magnetic material may be an amorphous soft magnetic material or a nanocrystalline soft magnetic material, as in the first to seventh examples described above, or it may be a soft magnetic material different from both amorphous and nanocrystalline soft magnetic materials.

[0110] The stator core 31 and the housing 60 are joined, for example, by interference fit. The interference fit may be shrink fit or cold fit.

[0111] The rotor 40 includes a rotor core 41, a permanent magnet 42, and a protective tube 44.

[0112] Unlike the first to seventh examples described above, the rotor core 41 includes a rotor core body 43 and a resin 45.

[0113] In this example, the permanent magnets 42 are arranged on the surface (specifically, the outer circumferential surface) of the rotor core body 43. That is, in this example, the motor 20 is a so-called surface magnet type (SPM). For example, as shown in Figure 9, recesses are formed at equal intervals in the circumferential direction on the outer circumferential surface of the rotor core body 43, and the permanent magnets 42 are arranged in these recesses. As a result, when the rotor core body 43 is viewed from the radially outside, the permanent magnets 42 are exposed from the rotor core body 43. The recesses in the rotor core body 43 in which the permanent magnets 42 are arranged may be provided over the entire rotor core body 43 in the axial direction, or only in a part of it.

[0114] For example, as shown in Figure 9, the outer surface of the permanent magnet 42 is formed as an arc surface that is flush with the outer surface of the rotor core body 43 at a circumferential position where there is no recess, when the permanent magnet 42 is housed in the recess of the rotor core body 43.

[0115] The protective tube 44 has a tubular shape that covers the entire radial outer surface of the rotor core 41 and the permanent magnet 42, and is joined to the rotor core 41. This allows the protective tube 44 to hold the permanent magnet 42, which is exposed on the surface of the rotor core body 43, from the radial outer surface.

[0116] In this example, the rotor core body 43 is a laminate formed by laminating steel plates containing amorphous soft magnetic material or nanocrystalline soft magnetic material with an adhesive resin in between. The adhesive resin layer between adjacent steel plates may be of the same type throughout the entire rotor core body 43, or a different type of resin may be used in some layers. For example, a minimum unit laminate is formed by laminating a certain number of steel plates with an adhesive resin in between, and then multiple minimum unit laminates are further laminated with adhesive resin in between to ultimately manufacture the rotor core body 43. In this case, the adhesive resin used when manufacturing the minimum unit laminate may be different from the adhesive resin used when manufacturing the final stator core body 33 from multiple minimum unit laminates.

[0117] The resin 45 is arranged adjacent to the outer circumferential surface of the rotor core body 43. The outer circumferential surface of the rotor core body 43 corresponds to the surface in a direction perpendicular to the lamination direction of the steel plate (in this example, the axial direction) (in this example, the radially outward side).

[0118] For example, as shown in Figure 9, the resin 45 is arranged adjacent to the outer circumferential surface of the rotor core body 43, including the circumferential position where the permanent magnet 42 is located. Alternatively, the resin 45 may be arranged only in a portion of the circumferential direction when viewed from a direction along the rotation axis AX. For example, the resin 45 may be provided only in the circumferential area of ​​the rotor 40 where the permanent magnet 42 is not provided, when viewed from a direction along the rotation axis AX.

[0119] Furthermore, as shown in Figure 10, for example, the resin 45 is arranged over the entire axial area of ​​the outer circumferential surface of the rotor core body 43. Alternatively, the resin 45 may be arranged only in a portion of the axial area of ​​the outer circumferential surface of the rotor core body 43.

[0120] The melting or decomposition temperature of the resin 45 is lower than the crystallization temperature of the steel plate in the rotor core body 43. As a result, when heat is generated from the outer circumferential surface of the rotor core body 43, the resin 34 melts or decomposes before the steel plate of the rotor core body 43 crystallizes, and the heat absorption effect at that time suppresses the thermal impact on the steel plate of the rotor core body 43. Therefore, it is possible to suppress changes in the properties of the rotor core body 43 due to crystallization of the rotor core body 43.

[0121] Furthermore, as with the resin 34 described above, if a resin 45 is used whose decomposition temperature is lower than the crystallization temperature of the steel plate in the rotor core body 43, care is taken to ensure that the resin 45 is in an atmosphere different from an oxygen atmosphere in situations where thermal effects on the rotor core body 43 may occur. For example, if temporary thermal effects occur during the manufacturing process of the motor module 10, that manufacturing process is carried out in an atmosphere different from an oxygen atmosphere.

[0122] The resin 45 includes, for example, at least one of polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polybutylene terephthalate (PBT), and polyethylene terephthalate (PET) as a resin material with a melting temperature lower than the crystallization temperature of the steel plate of the rotor core body 43. The resin 45 also includes, for example, at least one of epoxy resin, acrylic resin, and varnish as a resin material with a decomposition temperature lower than the crystallization temperature of the steel plate of the rotor core body 43.

[0123] Furthermore, the resin 45 is the same type of resin as the adhesive resin used in the rotor core body 43, which is a laminate of steel plates. As described above, if two or more types of resins are used as the adhesive resin in the rotor core body 43, which is a laminate of steel plates, the resin 34 may be the same type of resin as any one of them.

[0124] Furthermore, the same type of resin 45 and adhesive resin are formed, for example, solely from resin material. In other words, it is preferable that the resin 45 and adhesive resin do not contain additives such as inorganic fillers. If inorganic fillers are not included, the thickness of the adhesive resin layer in the laminate of steel plates is not constrained by the particle size of the inorganic fillers, and as a result, the thickness of the adhesive resin layer in the rotor core body 43 can be reliably reduced to the desired extent.

[0125] For example, the resin 45 is integrated with the resin used to bond the rotor core body 43, which is a laminate of steel plates. In this case, by intentionally allowing the resin used to bond the rotor core body 43 to protrude outwards, the protruding portion of the resin can function as resin 45. This eliminates the need for a separate process to arrange resin 45 during the manufacturing of the motor module 10, simplifying the manufacturing process and reducing costs. However, resin 45 may be provided separately from the resin used to bond the rotor core body 43, which is a laminate of steel plates.

[0126] For example, the protective tube 44 and the rotor core 41 are joined by shrink fitting. The temperature of the protective tube 44 during shrink fitting reaches, for example, about 400°C. Therefore, during the shrink fitting process, the high temperature of the protective tube 44 acts on the outer surface of the rotor core body 43. At this time, the resin 45 melts or decomposes before the steel plate of the rotor core body 43 reaches its crystallization temperature. As a result, the endothermic effect of the resin 45 during melting or decomposition suppresses the crystallization of the steel plate of the rotor core body 43, and consequently, changes (specifically deterioration) in the properties of the rotor core body 43 can be suppressed.

[0127] [Other examples of motor modules] Other examples of the motor module 10 are described below.

[0128] The first to eighth examples of the motor module 10 described above may be modified or altered as appropriate. Hereinafter, examples of modifications or alterations made to the first to eighth examples of the motor module 10 described above will be referred to as "modified versions" for convenience.

[0129] <First variation> In the eighth example of the motor module 10 described above (Figures 9 and 10), a space similar to the space SP1 provided by the relationship between the stator core body 33, resin 34, and housing 60 in the second example described above (Figure 3) may be provided by the relationship between the rotor core body 43, resin 45, and protective tube 44. This allows, for example, when shrink-fitting the protective tube 44 and the rotor core 41, the gas generated when the resin 45 decomposes due to the high temperature heat acting from the protective tube 44 can be discharged to the outside of the rotor core 41 through this space. In this case, in the circumferential direction, grooves similar to the grooves 33C are provided on the outer circumferential surface of the rotor core body 43 in the area where the permanent magnets 42 are not provided, and resin 45 is provided in the area adjacent to the area where the grooves are provided.

[0130] <Second variation> In the eighth example of the motor module 10 described above, a space similar to the space SP2 provided in the relationship between the stator core body 33 and the resin 34 in the third example (Figure 4) described above may be provided in the relationship between the rotor core body 43 and the resin 45. This provides the same function and effect as the first modified example described above. In this case, in the circumferential direction, grooves similar to the grooves 33D are provided on the outer circumferential surface of the rotor core body 43 in the area where the permanent magnets 42 are not provided, and resin 45 is provided in the area including the area where the grooves are provided.

[0131] <Third variation> In the eighth example of the motor module 10 described above, a space similar to the space SP3 provided in the fourth example (Figure 5) in relation to the stator core body 33 or housing 60 and the resin 34 may be provided in relation to the rotor core body 43 and the resin 45. This provides the same function and effect as the first modified example described above. In this case, at least one of the outer and inner surfaces of the resin 45 is provided with a groove similar to the groove 33D.

[0132] <Fourth variation> In the eighth example of the motor module 10 described above, a space similar to the space SP4 provided in the fifth example (Figure 6) in relation to the stator core body 33, resin 34, and housing 60 may be provided in relation to the rotor core body 43, resin 45, and protective tube 44. This provides the same effects and advantages as the first modified example described above. In this case, for example, the outer circumferential surface of the rotor core body 43 is formed such that the outer diameter of the rotor core body 43 decreases from both ends of the area where the permanent magnet 42 is not provided toward the intermediate position. The resin 45 is provided adjacent to the outer circumferential surface of the rotor core body 43 and such that its radial thickness changes in the circumferential direction.

[0133] <Fifth variation> In the eighth example of the motor module 10 described above, in addition to the resin 45, member 70 may be arranged adjacent to the outer circumferential surface of the rotor core body 43, similar to the sixth example (Figure 7) or the seventh example (Figure 8) described above.

[0134] <Sixth variation> In any of the first to seventh examples of the motor module 10 described above, the rotor core 41 of the eighth example of the motor module 10 and any of the first to fifth modified examples of the motor module 10 described above may be used.

[0135] [Examples of motor module applications] Refer to Figure 11 to explain an example of the application of the motor module 10.

[0136] Figure 11 shows an example of a refrigeration system 1.

[0137] The refrigeration device 1 circulates a refrigerant through the refrigerant circuit RC and uses a compression refrigeration cycle to cool or heat the target liquid or gas.

[0138] Refrigeration device 1 is, for example, a chiller that cools a target liquid (cooled liquid) by heat exchange between a refrigerant and the target liquid using a compression refrigeration cycle. The cooled liquid is, for example, water or brine. Alternatively, refrigeration device 1 may be a water heater that generates hot water by heat exchange between a refrigerant and water using a compression refrigeration cycle. Alternatively, refrigeration device 1 may be an air conditioner that cools or heats a target space by heat exchange between a refrigerant and air. The following explanation will focus mainly on the case where refrigeration device 1 is a chiller.

[0139] As shown in Figure 1, the refrigeration system 1 includes refrigerant paths L1 to L4, a compressor 100, a heat exchanger 200, an expansion mechanism 300, and a heat exchanger 400 as components of the refrigerant circuit RC.

[0140] Refrigerant pathways L1 to L4 are the paths through which the refrigerant flows. Refrigerant pathways L1 to L4 are, for example, metal pipes made of steel or similar material.

[0141] Refrigerant path L1 connects the heat exchanger 400 to the suction port of the compressor 100. Refrigerant path L2 connects the discharge port of the compressor 100 to the heat exchanger 200. Refrigerant path L3 connects the heat exchanger 200 to the expansion mechanism 300. Refrigerant path L4 connects the expansion mechanism 300 to the heat exchanger 400.

[0142] The compressor 100 compresses the low-pressure refrigerant flowing in from the refrigerant path L1 and discharges the high-pressure refrigerant into the refrigerant path L2.

[0143] The compressor 100 includes a compression mechanism 110 that compresses the refrigerant flowing in from the refrigerant path L1 and discharges it into the refrigerant path L2, and a motor module 10 that drives the compression mechanism 110. The compression mechanism 110 is housed inside the housing 60, for example, like the motor 20.

[0144] The heat exchanger 200 performs heat exchange between a refrigerant flowing through its interior and an external heat transfer medium (for example, cooling water).

[0145] The heat exchanger 200 is a so-called condenser, which cools the high-temperature and high-pressure refrigerant, compressed by the compressor 100 and flowing in from the refrigerant path L2, by heat exchange with an external heat transfer medium, thereby condensing it and releasing the high-pressure liquid refrigerant into the refrigerant path L3.

[0146] The expansion mechanism 300 expands the high-pressure liquid refrigerant, causing the low-pressure gas-liquid mixture of refrigerant to flow out. The expansion mechanism 300 is, for example, an expansion valve or an orifice.

[0147] The expansion mechanism 300 expands the high-pressure liquid refrigerant that flows in from the refrigerant path L3 and has passed through the heat exchanger 200, causing the low-pressure gas-liquid mixture of refrigerant to flow out into the refrigerant path L4.

[0148] The heat exchanger 400 performs heat exchange between the refrigerant flowing through its interior and the external liquid to be cooled.

[0149] The heat exchanger 400 is a so-called evaporator, and by absorbing heat from the liquid to be cooled, it heats the low-pressure gas-liquid mixture of refrigerant that flows in from the refrigerant path L4 and has been expanded by the expansion mechanism 300, thereby evaporating it and causing the low-pressure gaseous refrigerant to flow out into the refrigerant path L1. In this way, the refrigeration device 1 can cool the liquid to be cooled.

[0150] Thus, the motor module 10 according to this embodiment can be applied to the compressor 100 of the refrigeration system 1.

[0151] [Other embodiments] Next, other embodiments will be described.

[0152] The embodiments described above may be modified or altered as appropriate.

[0153] For example, the arrangement structure of the stator core body 33 and resin 34, and the rotor core body 43 and resin 45 in the above-described embodiment may be used in other magnetic members that employ a laminate formed by laminating steel plates containing amorphous soft magnetic material or nanocrystalline soft magnetic material with an adhesive resin in between. Other magnetic members include, for example, magnetic members applied to generators, transformers, noise filters, or choke coils.

[0154] [Effect] Next, the operation of the magnetic member, motor, motor module, compressor, and refrigeration system according to this embodiment will be described.

[0155] In the first aspect of this embodiment, the magnetic member comprises a laminate in which steel plates containing an amorphous soft magnetic material or a nanocrystalline soft magnetic material are laminated with a first resin in between, and a second resin. The laminate is, for example, the stator core body portion 33 or the rotor core body portion 43 described above. The first resin is an adhesive resin for the stator core body portion 33 or the rotor core body portion 43 described above. The second resin is, for example, the resin 34 or the resin 45 described above. Specifically, the second resin is arranged on the surface of the laminate in a direction perpendicular to the lamination direction of the laminate. The first resin and the second resin are of the same type, and their melting temperature or decomposition temperature is lower than the crystallization temperature of the steel plate.

[0156] As a result, the magnetic member can melt or decompose the first and second resins at a temperature lower than the crystallization temperature of the steel sheets when there is a heat influence from the surface on a laminate in which steel sheets containing amorphous soft magnetic materials or nanocrystalline soft magnetic materials are laminated with a first resin in between. Therefore, the magnetic member can suppress the temperature rise of the steel sheets by the endothermic effect caused by the melting and decomposition of the first and second resins, and as a result, suppress the crystallization of the steel sheets. Thus, the magnetic member can simply suppress the heat influence on a laminate of steel sheets containing amorphous soft magnetic materials or nanocrystalline soft magnetic materials.

[0157] Furthermore, in a second aspect of this embodiment, based on the first aspect described above, the first resin and the second resin may include epoxy resin, acrylic resin, varnish, polyphenylene sulfide, liquid crystal polymer, polybutylene terephthalate, or polyethylene terephthalate.

[0158] This makes it possible to achieve a state in which the melting or decomposition temperatures of the first and second resins are lower than the crystallization temperature of the steel sheet of the laminate.

[0159] Furthermore, in a third aspect of this embodiment, based on the first or second aspect described above, the first resin and the second resin may be integrally formed.

[0160] For example, by causing the first resin between adjacent steel plates of the laminate to protrude in a direction perpendicular to the lamination direction, the protruding first resin can be placed on the surface of the laminate. As a result, the magnetic member can make the first resin that protrudes onto the surface of the laminate function as a second resin, in an integrated state with the first resin remaining between adjacent steel plates of the laminate, thereby suppressing crystallization of the steel plates.

[0161] Furthermore, in a fourth aspect of this embodiment, based on the first or second aspect described above, the first resin and the second resin may be separate components.

[0162] As a result, the magnetic member can suppress the crystallization of the steel plates by placing a second resin on the surface of the laminated steel plates, in addition to the first resin placed between adjacent steel plates in the laminate.

[0163] Furthermore, in the fifth aspect of this embodiment, assuming any one of the first to fourth aspects described above, the first resin and the second resin do not need to contain additives.

[0164] This ensures that the first resin layer between the steel plates of the laminate can be made thinner.

[0165] Furthermore, in a sixth aspect of this embodiment, the motor includes a rotor that can rotate about a rotation axis, The motor comprises a stator arranged radially opposite the rotor. The motor is, for example, the motor 20 described above. The rotor is, for example, the rotor 40 described above. The stator is, for example, the stator 30 described above. Specifically, the stator or the rotor may include a core. The core is, for example, the stator core 31 or the rotor core 41 described above. The core may be a magnetic member described in any one of the first to fifth embodiments described above.

[0166] This allows the motor to suppress the crystallization of the steel plates that make up the core's laminate.

[0167] Furthermore, in a seventh aspect of this embodiment, based on the sixth aspect described above, the rotor may include a rotor core and a cylindrical protective tube covering the outer circumferential surface of the rotor core. The rotor core is, for example, the rotor core 41 described above. The protective tube is, for example, the protective tube 44 described above. Specifically, the core may be the rotor core. The second resin of the rotor core may be disposed between the surface of the rotor core and the inner circumferential surface of the protective tube.

[0168] As a result, the motor can absorb the heat generated when, for example, the protective tube and the rotor core are joined by interference fit, by melting or decomposing the first and second resins, thereby suppressing the crystallization of the laminated steel plates in the rotor core.

[0169] Furthermore, in the eighth aspect of this embodiment, based on the seventh aspect described above, a space adjacent to the second resin and communicating with the outside of the rotor core may be provided between the laminate of the rotor core and the inner circumferential surface of the protective tube.

[0170] This allows the motor to discharge the gas generated by the decomposition of the second resin to the outside of the rotor core.

[0171] Furthermore, in the ninth aspect of this embodiment, the motor module comprises a motor described in any one of the sixth to eighth aspects described above, and a housing that houses the motor inside. The motor module is, for example, the motor module 10 described above. The housing is, for example, the housing 60 described above. Specifically, the stator includes a stator core, and the core may be the stator core. The stator core is, for example, the stator core 31 described above. Also, the second resin of the stator core may be disposed between the surface of the stator core and the inner surface of the housing.

[0172] As a result, the motor module can absorb the heat generated when, for example, the housing and the stator core are joined by interference fit, through the melting or decomposition of the first and second resins, thereby suppressing the crystallization of the laminated steel plates in the stator core.

[0173] Furthermore, in the tenth aspect of this embodiment, based on the ninth aspect described above, a space may be provided between the laminate of the stator core and the inner surface of the housing that is adjacent to the second resin of the stator core and communicates with the outside of the stator core.

[0174] This allows the motor module to discharge the gas generated by the decomposition of the second resin to the outside of the stator core.

[0175] Furthermore, in the 11th aspect of this embodiment, the compressor may include the motor module described in the 9th or 10th aspect above, and a compression mechanism driven by the motor and housed inside the housing. The compression mechanism is, for example, the compression mechanism 110 described above.

[0176] This makes it possible to suppress the crystallization of the laminated steel plates in the core of the motor module mounted on the compressor.

[0177] Furthermore, in the twelfth aspect of this embodiment, the refrigeration system may include the compressor described in the eleventh aspect above.

[0178] This makes it possible to suppress the crystallization of the laminated steel plates in the core of the motor module of the compressor installed in the refrigeration system.

[0179] Although embodiments have been described above, it should be understood that various modifications to the form and details are possible without departing from the spirit and scope of the claims. [Explanation of Symbols]

[0180] 1. Refrigeration equipment 10 Motor Modules 20 motors 30 staters 31 Stator Core 32 coils 33 Stator core main body 33A Back yoke section 33B Teeth section 33C,33D Groove 34 Resin 40 rotors 41 Rotor core 42 Permanent Magnets 43 Rotor core body 44 Protection tube 45 resin 50 Rotation axis 60 cabinets 70 components 100 Compressors 110 Compression mechanism 200 heat exchanger 300 Expansion Mechanism 400 heat exchanger AX Rotation axis center SP1~SP4 Space

Claims

1. The material comprises a laminate (33, 43) in which steel plates containing an amorphous soft magnetic material or a nanocrystalline soft magnetic material are laminated with a first resin in between, and a second resin (34, 45), The second resin (34, 45) is arranged on the surface of the laminate (33, 43) in a direction perpendicular to the lamination direction of the laminate (33, 43), The first resin and the second resin (34, 45) are of the same type, and their melting temperature or decomposition temperature is lower than the crystallization temperature of the steel sheet. Magnetic material.

2. The first resin and the second resin (34, 45) include epoxy resin, acrylic resin, varnish, polyphenylene sulfide, liquid crystal polymer, polybutylene terephthalate, or polyethylene terephthalate. The magnetic member according to claim 1.

3. The first resin and the second resin (34, 45) are integrally formed. The magnetic member according to claim 1 or 2.

4. The first resin and the second resin (34, 45) are separate components. The magnetic member according to claim 1 or 2.

5. The first resin and the second resin (34, 45) do not contain additives. The magnetic member according to claim 1 or 2.

6. A rotor (40) that can rotate around its axis of rotation, The system comprises a rotor (40) and a stator (30) arranged radially opposite each other, The stator (30) or rotor (40) includes a core (31, 41), The core (31, 41) is the magnetic member described in claim 1 or 2. Motor.

7. The rotor (40) includes a rotor core (41) and a cylindrical protective tube (44) that covers the outer surface of the rotor core (41), The core is the rotor core (41), The second resin (45) of the rotor core (41) is disposed between the surface of the rotor core (41) and the inner circumferential surface of the protective tube (44). The motor according to claim 6.

8. Between the laminate (43) of the rotor core (41) and the inner circumferential surface of the protective tube (44), a space is provided that is adjacent to the second resin (45) and communicates with the outside of the rotor core (41). The motor according to claim 7.

9. The motor (20) according to claim 6, The system comprises a housing (60) that houses the motor inside, The stator (30) includes a stator core (31), The core is the stator core (31), The second resin (34) of the stator core (31) is disposed between the surface of the stator core (31) and the inner surface of the housing (60). Motor module.

10. Between the laminate (33) of the stator core (31) and the inner surface of the housing (60), spaces (SP1, SP2, SP3, SP4) are provided that are adjacent to the second resin (34) of the stator core (31) and communicate with the outside of the stator core (31). The motor module according to claim 9.

11. The motor module (10) described in claim 9, The system includes a compression mechanism (110) which is driven by the motor (20) and housed inside the housing (60), Compressor.

12. The compressor (100) according to claim 11, Refrigeration equipment.

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