WO2022249411A1 - Dispositif électromagnétique avec boîtier de bobine et boîtier de bobine - Google Patents

Dispositif électromagnétique avec boîtier de bobine et boîtier de bobine Download PDF

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Publication number
WO2022249411A1
WO2022249411A1 PCT/JP2021/020282 JP2021020282W WO2022249411A1 WO 2022249411 A1 WO2022249411 A1 WO 2022249411A1 JP 2021020282 W JP2021020282 W JP 2021020282W WO 2022249411 A1 WO2022249411 A1 WO 2022249411A1
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WIPO (PCT)
Prior art keywords
coil case
coil
electromagnetic device
case portion
core
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PCT/JP2021/020282
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English (en)
Japanese (ja)
Inventor
友和 吉田
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ファナック株式会社
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Priority to PCT/JP2021/020282 priority Critical patent/WO2022249411A1/fr
Publication of WO2022249411A1 publication Critical patent/WO2022249411A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof

Definitions

  • the present invention relates to electromagnetic equipment with a coil case, such as reactors, transformers, linear motors and motors, and coil cases.
  • electromagnetic devices have been developed that include a core body that includes an outer core and a plurality of cores arranged inside the outer core.
  • a coil is wound around each of the plurality of iron cores.
  • a technique of assembling a coil housed in a coil case into an electromagnetic device for the purpose of insulating the core body and the coil See, for example, US Pat.
  • JP 2019-004126 A Japanese Patent Application Laid-Open No. 2019-016711
  • the core body is usually formed by stacking multiple magnetic plates. Therefore, when an electromagnetic device with different characteristics is required, the number of magnetic plates to be laminated is changed to change the characteristics of the electromagnetic device.
  • the height of the electromagnetic device will change. need to prepare. Since the coil case is usually made of resin, it is necessary to create a new mold in order to prepare another coil case. In particular, when a plurality of electromagnetic devices with different characteristics are required, it is necessary to prepare separate coil cases for each electromagnetic device, which is extremely complicated.
  • a core body provided with a plurality of iron cores, a coil to be attached to each of the plurality of iron cores, and at least partially covering each of the plurality of iron cores, the a coil case insulated from a coil, wherein the coil case includes a first coil case portion and a second coil case portion that are divided into two in the axial direction of the core body.
  • the coil case is divided into two in the height direction of the core body, the divided coil cases are arranged on the upper end side and the lower end side of the coil, respectively.
  • the coil can be supported by its upper and lower ends, so there is no need to prepare a separate coil case. Therefore, even if the height of the electromagnetic device changes, it is possible to eliminate the need to change the coil case.
  • FIG. 4 is a cross-sectional view of a core body included in the electromagnetic device based on the first embodiment;
  • FIG. 1B is a perspective view of the electromagnetic device shown in FIG. 1A;
  • FIG. It is an exploded perspective view of a coil case.
  • 2B is a front view of the coil case shown in FIG. 2A;
  • FIG. 4 is a perspective view of an outer core portion showing a state in which a coil is housed in a coil case; It is a perspective view of an outer peripheral core portion.
  • FIG. 11 is a perspective view of another outer peripheral core portion; It is a front view of a coil case. It is another front view of a coil case.
  • 3 is a perspective view of a coil case and an iron core;
  • FIG. 10 is another perspective view of the coil case and core;
  • FIG. 11 is a partial perspective view of a fitting portion in another aspect;
  • FIG. 11 is a partial perspective view of a fitting portion in still another aspect;
  • FIG. 9 is an exploded perspective view of a coil case in another embodiment;
  • 6B is a partial perspective view of an electromagnetic device including the coil case shown in FIG. 6A;
  • FIG. 6B is a partial perspective view of another electromagnetic device including the coil case shown in FIG. 6A;
  • FIG. FIG. 10 is a cross-sectional view of a core body included in the electromagnetic device according to the second embodiment;
  • FIG. 4 is a cross-sectional view of a core body included in an electromagnetic device according to another embodiment;
  • FIG. 11 is a cross-sectional view of a core body included in an electromagnetic device according to yet another embodiment;
  • a three-phase reactor is mainly described as an example of an electromagnetic device, but the application of the present disclosure is not limited to three-phase reactors, and is widely applicable to multi-phase reactors that require a constant inductance in each phase. applicable and also applicable to transformers.
  • the reactor according to the present disclosure is not limited to being provided on the primary side and secondary side of inverters in industrial robots and machine tools, and can be applied to various devices.
  • FIG. 1A is a cross-sectional view of a core body included in the electromagnetic device based on the first embodiment.
  • FIG. 1B is a perspective view of the electromagnetic device shown in FIG. 1A.
  • core body 5 of electromagnetic device 6 includes outer core 20 and three core coils 31 to 33 arranged inside outer core 20 .
  • core coils 31 to 33 are arranged inside a substantially hexagonal outer peripheral core 20 .
  • These iron core coils 31 to 33 are arranged at regular intervals in the circumferential direction of the core body 5 .
  • the outer peripheral iron core 20 may have another rotationally symmetrical shape, such as a circular shape.
  • the number of core coils may be a multiple of 3, and in that case, the reactor as the electromagnetic device 6 can be used as a three-phase reactor.
  • each of the core coils 31-33 includes cores 41-43 extending only in the radial direction of the outer core 20 and coils 51-53 attached to the cores. At least three coils 51-53 are housed in coil cases 61-63, respectively.
  • the coil cases 61-63 are preferably made of a non-magnetic material such as resin.
  • the coil cases 61-63 serve to at least partially cover the respective cores 41-43 to insulate them from the coils 51-53.
  • the outer peripheral core 20 is composed of a plurality of, for example, three outer peripheral core portions 24 to 26 divided in the circumferential direction.
  • the outer core portions 24-26 are formed integrally with the cores 41-43, respectively.
  • the outer core portions 24-26 and the cores 41-43 are formed by laminating a plurality of magnetic plates, such as iron plates, carbon steel plates, and electromagnetic steel plates, or formed from dust cores.
  • the outer peripheral core 20 is composed of a plurality of outer peripheral core portions 24 to 26 in this way, even if the outer peripheral core 20 is large, such an outer peripheral core 20 can be easily manufactured. can.
  • the number of cores 41-43 does not necessarily have to match the number of outer core portions 24-26.
  • the radially inner ends of the iron cores 41 to 43 are located near the center of the outer peripheral iron core 20 .
  • the radially inner ends of the cores 41 to 43 converge toward the center of the outer core 20 and have a tip angle of about 120 degrees.
  • the radially inner ends of cores 41-43 are then separated from each other by magnetically coupleable gaps 101-103.
  • the radially inner end of the core 41 is separated from the radially inner ends of the two adjacent cores 42, 43 via the gaps 101, 103, respectively.
  • the configuration shown in FIG. 1A does not require a center iron core positioned at the center of the core body 5, so the core body 5 can be made lightweight and simple. Furthermore, since the three core coils 31-33 are surrounded by the outer core 20, the magnetic fields generated by the coils 51-53 do not leak outside the outer core 20. FIG. In addition, since the gaps 101 to 103 can be provided with an arbitrary thickness at low cost, it is advantageous in terms of design compared to reactors of conventional structure.
  • the difference in the magnetic path length between the phases is reduced as compared with the electromagnetic device with the conventional structure. Therefore, in the present disclosure, it is also possible to reduce the inductance imbalance caused by the difference in magnetic path length.
  • each of the coils 51 to 53 attached to the iron cores 41 to 43 is formed by winding a single conductive wire having a rectangular cross section, that is, a rectangular wire at least once. It is a rectangular wire coil formed. Note that the coils 51 to 53 (54) may be coils other than rectangular wire coils.
  • FIG. 2A is an exploded perspective view of the coil case viewed from the inside in the radial direction of the electromagnetic device
  • FIG. 2B is a front view of the coil case shown in FIG. 2A.
  • the coil case 61 is divided into two parts in the axial direction of the electromagnetic device 5 .
  • the coil case 61 is composed of a first coil case portion 61a located on the upper side and a second coil case portion 61b located on the lower side.
  • the first coil case portion 61a supports the upper end side of the coil 51.
  • the first coil case portion 61a includes a housing 81a having an open surface and a lower surface positioned radially outwardly of the electromagnetic device 6, and a hollow projecting portion 82a projecting radially inwardly of the electromagnetic device 6 from the aforementioned surface of the housing 81a.
  • the second coil case portion 61b supports the lower end side of the coil 51.
  • the second coil case portion 61b also includes an outer housing 81b having an open surface and an upper surface positioned radially outwardly of the electromagnetic device 6, and a hollow projection projecting radially inwardly of the electromagnetic device 6 from the aforementioned surface of the housing 81b. and a portion 82b.
  • FIG. 2C is a perspective view of the outer core portion showing the state in which the coil is housed in the coil case.
  • the coil 51 includes a first coil receiving portion 83a formed between the housing 81a and the hollow protrusion 82a and a second coil formed between the housing 81b and the hollow protrusion 82b. It is housed in the housing portion 83b.
  • the hollow protrusions 82 a and 82 b are inserted into the openings of the coil 51 .
  • the lower portion of the first coil case portion 61a and the upper portion of the second coil case portion 61b are configured as a fitting portion 70 that can be fitted to each other.
  • the fitting portion 70 of the first coil case portion 61a is formed as a thin portion 71a having a thickness T3 that is less than the thickness T1 of the housing 81a and the thickness T2 of the hollow protrusion 82a.
  • the fitting portion 70 of the second coil case portion 61b is formed as a thin portion 71b having a thickness T3' smaller than the thickness T1 of the housing 81b and the thickness T2 of the hollow projecting portion 82b.
  • the thicknesses T1 and T2 are preferably equal to each other.
  • the thicknesses T3, T3' are preferably equal to each other and half the thicknesses T1, T2.
  • the outer surface of the thin portion 71a on the housing 81a side is flush with the outer surface of the housing 81a. Further, the outer surface of the thin portion 71a on the side of the hollow protruding portion 82a is flush with the inner surface of the hollow protruding portion 82a. Similarly, the inner surface of the thin portion 71b on the housing 81b side is flush with the inner surface of the housing 81b. Further, the inner surface of the thin portion 71b on the side of the hollow protruding portion 82b is flush with the outer surface of the hollow protruding portion 82a.
  • the distance La between the inner surface of the thin portion 71a of the housing 81a and the inner surface of the thin portion 71a of the hollow protrusion 82a is the distance between the outer surface of the thin portion 71b of the housing 81b and the outer surface of the thin portion 71b of the hollow protrusion 82b. It is the same as or slightly larger than the distance Lb.
  • the fitting portion 70 of the second coil case portion 61b can be slidably inserted into the fitting portion 70 of the first coil case portion 61a.
  • the length of the fitting portion 70 of the first coil case portion 61a and the length of the fitting portion 70 of the second coil case portion 61b in the axial direction of the electromagnetic device 6 are preferably equal to each other.
  • FIGS. 3A and 3B are perspective views of the outer core portion.
  • the outer core portions 24, 24' shown in these drawings are formed by laminating a plurality of magnetic plates.
  • the number of magnetic plates laminated to form the outer core portion 24 shown in FIG. 4A is greater than the number of magnetic plates laminated to form the outer core portion 24' shown in FIG. 3B. .
  • the outer core portion 24 shown in FIG. 3A is taller than the outer core portion 24 shown in FIG. 3B.
  • FIGS. 4A and 4B are front views of the coil case. Furthermore, FIGS. 4C and 4D are perspective views of the coil case and core. 4C is a drawing corresponding to FIGS. 3A and 4A, and FIG. 4D is a drawing corresponding to FIGS. 3B and 4B. In these and other drawings, coil 51 and/or core 41 may be omitted for ease of understanding.
  • the fitting portion 70 of the second coil case portion 61b is slightly inserted into the fitting portion 70 of the first coil case portion 61a.
  • the thin portion 71a and the thin portion 71b are slightly engaged with each other. Therefore, the overall height of the hollow protrusions 82a and 82b in the axial direction of the electromagnetic device 6 is relatively large.
  • the total height of the hollow protrusions 82a, 82b is determined according to the height of the outer peripheral core portion 24 to be applied, that is, the number of laminated magnetic plates.
  • the height of the coil case 61 shown in FIG. 4A is adjusted to accommodate the relatively tall outer core portion 24' shown in FIG. 3A.
  • FIG. 4C since the illustration of the coil 51 is omitted, most of the thin portion 71a of the hollow protruding portion 82a can be seen.
  • the coil case 61 is divided into two parts, the first coil case portion 61a and the second coil case portion 61b.
  • the first coil case portion 61 a supports the upper end side of the coil 51 and the second coil case portion 61 b supports the lower end side of the coil 51 . Therefore, even if the height of the outer core portion 24 changes, there is no need to prepare another coil case with a different height.
  • the entire coil case 61 can be Height can be adjusted.
  • the fitting portion 70 of the second coil case portion 61b is inserted into the fitting portion 70 of the first coil case portion 61a, the height of the entire coil case 61 can be easily adjusted with a simple configuration.
  • the thin portions 71a of the coil case portions 61a and 61b are at least partially fitted to each other.
  • the coil case portions 61a, 61b are never completely separated, and no gap occurs between the coil case portions 61a, 61b.
  • the coil 51 to be accommodated in the coil case 61 and the core 41 there are hollow projecting portions 82a, 82b, or the thin portion 71a of the first coil case portion 61a and/or the second coil.
  • a snap engaging portion 91 which is preferably made of resin, is provided on a portion of the hollow protruding portion 82a.
  • the snap engaging portion 91 includes a plate spring portion 91a extending radially inward in a cantilever manner from the end surface of the housing 81b positioned radially outwardly of the electromagnetic device 6, and a holding portion 91b provided at the tip of the plate spring portion 91a. including.
  • FIG. 5A is a partial perspective view of a fitting portion in another aspect.
  • 5A shows the inner surfaces of the housings 81a and 81b shown on the right side in FIG. 4A and the like.
  • the left side of housings 81a, 81b, etc. in FIG. 4A etc. shall have the same structure.
  • a recess 71c is formed in the housing 81a of the first coil case portion 61a adjacent to the thin portion 71a of the first coil case portion 61a.
  • the recess 71c and the thin portion 71a are on the same plane.
  • the concave portion 71c extends in the sliding direction of the coil case portions 61a and 61b.
  • the housing 81b of the second coil case portion 61b is provided with a convex portion 71d that fits into the concave portion 71c adjacent to the thin portion 71b of the second coil case portion 61b.
  • the convex portion 71d and the thin portion 71b are on the same plane. In the sliding direction of the coil case portions 61a and 61b, the convex portion 71d extends so as to protrude from the tip of the thin portion 71b.
  • the convex portion 71d may be formed in the first coil case portion 61a, and the concave portion 71c may be formed in the second coil case portion 61b. Furthermore, a case in which a plurality of recesses 71c and a plurality of projections 71d engaged therewith are formed is also included within the scope of the present disclosure.
  • FIG. 5B is a partial perspective view of a fitting portion in still another aspect.
  • 5B shows the inner surfaces of the housings 81a and 81b shown on the right side in FIG. 4A and the like.
  • the left side of housings 81a, 81b, etc. in FIG. 4A etc. shall have the same structure.
  • the first coil case portion 61a and the second coil case portion 61b do not have thinned portions 71a, 71b.
  • housings 81a, 81b and hollow projections 82a, 82b extend to positions corresponding to thinned portions 71a, 71b, respectively.
  • the housings 81a, 81b and the hollow projections 82a, 82b are assumed to have the same thickness.
  • a plurality of through holes 70c are sequentially formed in the housing 81a along the axial direction of the electromagnetic device 6.
  • a projecting portion 70a projects upward from the upper end of the housing 81b.
  • the thickness of the projecting portion 70a is the same as the thickness of the housing 81b.
  • an engaging portion 70b that engages with the through hole 70c is provided at the tip of the projecting portion 70a.
  • the projecting portion 70a and the engaging portion 70b are preferably formed integrally with the housing 81b.
  • the fitting portion 70 in the aspect shown in FIG. 5B includes a projecting portion 70a, an engaging portion 70b, and a plurality of through holes 70c.
  • the engaging portion 70b of the protruding portion 70a is engaged with the lowermost through hole 70c.
  • the length of the coil case 61 can be set to the longest. It will be understood that the length of the coil case 61 can be adjusted by changing the engaging position of the engaging portion 70b to another through hole 70c. In this case, since it is not necessary to form the thin portions 71a and 71b, the length of the coil case 61 can be adjusted with a simple configuration.
  • FIG. 6A is an exploded perspective view of a coil case in another embodiment, similar to FIG. 2A.
  • the upper side of the first coil case portion 61a in FIG. 2A is open.
  • the housing 81a of the first coil case portion 61a shown in FIG. 6A has an integral top surface 85 so that the top side of the first coil case portion 61a is closed. Therefore, the coil case 61 shown in FIG. 6A can cover the coil 51 over its entire circumference.
  • FIG. 6B is a partial perspective view of an electromagnetic device provided with the coil case shown in FIG. 6A.
  • a linear motor is shown as the electromagnetic device 6 in FIG. 6B.
  • the core body 5 of the electromagnetic device 6 is formed by stacking a plurality of magnetic plates, such as iron plates, carbon steel plates, and electromagnetic steel plates, or formed from a dust core. Note that the lamination direction of the plurality of magnetic plates is perpendicular to the juxtaposition direction of the plurality of iron cores 41 and the like.
  • the core body 5 includes a plurality of iron cores 41, 42, 43, . The heights of the iron cores 41, 42, 43, .
  • FIG. 6C is a partial perspective view of another electromagnetic device provided with the coil case shown in FIG. 6A.
  • FIG. 6C shows a motor stator as the electromagnetic device 6 .
  • the core body 5 is formed by stacking a plurality of magnetic plates, such as iron plates, carbon steel plates, and electromagnetic steel plates, or from a dust core. Note that the lamination direction of the plurality of magnetic plates is the same as the radial direction of the stator.
  • the core body 5 includes a plurality of iron cores 41, 42, 43, . The heights of the iron cores 41, 42, 43, .
  • iron cores 41, 42, 43, . . . are inserted into coil cases 61, 62, 63, . It has become so. Therefore, also in this case, the same effect as described above can be obtained.
  • the coil cases 61, 62, 63, . . . cover the coils 51, 52, 53, .
  • the electromagnetic device 6 when used, the magnetic flux of the coil 51 and the like can be prevented from leaking to the outside of the coil case 61 and the like.
  • the motor is a
  • the coil case 61 shown in FIG. 6A may also be used for other electromagnetic devices 6, such as reactors and transformers.
  • FIG. 7 is a top view of a core body of an electromagnetic device in another embodiment.
  • the core body 5 shown in FIG. 7 includes a substantially octagonal outer core 20 and four core coils 31 to 34 arranged inside the outer core 20 and similar to those described above. .
  • These core coils 31 to 34 are arranged at regular intervals in the circumferential direction of the core body 5 .
  • the number of iron cores is preferably an even number of 4 or more, so that the reactor as the electromagnetic device 6 can be used as a single-phase reactor.
  • the outer peripheral core 20 is composed of four outer peripheral core portions 24 to 27 divided in the circumferential direction.
  • Each core coil 31-34 includes a radially extending core 41-44 and coils 51-54 attached to the core. Radial outer ends of cores 41 to 44 are formed integrally with outer core portions 21 to 24, respectively. It should be noted that the number of cores 41-44 does not necessarily have to match the number of outer core portions 24-27.
  • the radially inner ends of the iron cores 41 to 44 are located near the center of the outer peripheral iron core 20 .
  • the radially inner ends of the cores 41-44 converge toward the center of the outer core 20, and the tip angle is approximately 90 degrees.
  • the radially inner ends of cores 41-44 are then separated from each other by magnetically coupleable gaps 101-104.
  • FIG. 7 At least three coils 51 to 54 are accommodated in coil cases 61 to 64 similar to those described above. It will therefore be seen that the height of the coil cases 61-64 can be adjusted when the height of the electromagnetic device 6 changes, thereby eliminating the need to change the coil cases.
  • FIGS. 8A and 8B are cross-sectional views of core bodies included in electromagnetic devices according to other embodiments.
  • a transformer is shown as an example of the electromagnetic device 6 in these drawings. Since FIGS. 8A and 8B are similar to FIGS. 1A and 7, respectively, the description of the members already described will be omitted. 8A and 8B, the radially inner ends of cores 41-43 (44) abut against the radially inner ends of adjacent cores 41-43 (44). Therefore, the electromagnetic device 6 shown in FIGS. 8A and 8B does not include gaps 101-103 (104).
  • the coils 51 to 53 (54) are housed in coil cases 61 to (63) 64 similar to those described above. It will therefore be seen that the height of the coil cases 61-63 can be adjusted when the height of the electromagnetic device 6 changes, thereby eliminating the need to change the coil cases.
  • a core body (5) having a plurality of iron cores (41-44), coils (51-54) to be attached to each of the plurality of iron cores, and a coil case (61 to 64) that at least partially covers each of a plurality of iron cores and insulates them from the coil, wherein the coil case is divided into two in the axial direction of the core body;
  • An electromagnetic device (6) is provided that includes a case portion (61a) and a second coil case portion (61b).
  • each of the first coil case portion and the second coil case portion includes a fitting portion (70) that slidably fits together.
  • the fitting portion of the second coil case portion is inserted inside the fitting portion of the first coil case portion.
  • the mating portion of the first coil case portion and the mating portion of the second coil case portion are respectively connected to the first coil case portion and the second coil case portion. It includes thin portions (71a, 71b) that are thinner than the thickness of the two coil case portions, and the thin portion of the first coil case portion extends outside the coil case more than the thin portion of the second coil case portion. placed on one side.
  • the coil case covers the coil over its entire circumference.
  • the core body includes an outer core (20) composed of a plurality of outer core portions (24 to 27).
  • the plurality of iron cores protrude from one surface of the flat or curved substrate portion of the core body at equal intervals.
  • each of the fitting portion of the first coil case portion and the fitting portion of the second coil case portion includes the first coil case portion and the second coil case portion. It includes thin portions (71a, 71b) that are thinner than the thickness of the two coil case portions, and the thin portion of the first coil case portion extends outside the coil case more than the thin portion of the second coil case portion. placed on one side.
  • one of the concave portion (71a) and the convex portion (71b) that engage with each other is formed adjacent to the thin portion of the first coil case portion.
  • the other of the concave portion and the convex portion is formed adjacent to the thin portion of the thin portion of the second coil case portion.
  • the coil case covers the entire circumference of the coil.
  • the coil case is divided into two in the height direction of the core body, so that the divided coil cases are arranged on the upper end side and the lower end side of the coil, respectively.
  • the coil can be supported by its upper and lower ends, so there is no need to prepare a separate coil case. Therefore, even if the height of the electromagnetic device changes, it is possible to eliminate the need to change the coil case.
  • the height of the coil case can be adjusted.
  • the height of the coil case can be adjusted with a simple configuration.
  • a sufficient insulation distance can be secured between the iron core and the coil.
  • bonding strength can be increased.
  • magnetic flux can be prevented from leaking from the coil case over the entire coil case.
  • the electromagnetic equipment can be used as a reactor or transformer.
  • the electromagnetic machine can be used as a linear motor or as a motor stator.
  • electromagnetic device 20 outer core 24-27, 24' outer core 31-34 core coil 41-44 core 51-54 coil 61-64 coil case 61a first coil case portion 61b second coil case portion 70 fitting portion 70a projection 70b engagement portion 70c through hole 71a, 71b thin portion 71c recess 71d projection 81a, 81b housing 82a, 82b hollow projection 85 upper surface 101 to 104 gap

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  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention permet de s'affranchir du besoin de changer un boîtier de bobine, même en cas de modification de la hauteur d'un dispositif électromagnétique. L'invention concerne un dispositif électromagnétique (6) comprenant un corps de noyau (5) comprenant une pluralité de noyaux de fer (41 à 44), des bobines (51 à 54) à fixer aux noyaux de fer, respectivement, et des boîtiers de bobine (61 à 64) qui recouvrent au moins partiellement les noyaux de fer, respectivement, pour les isoler des bobines. Chacun des boîtiers de bobine est divisé, dans la direction axiale du corps de noyau, en deux parties, à savoir une première partie de boîtier de bobine (61a) et une seconde partie de boîtier de bobine (61b).
PCT/JP2021/020282 2021-05-27 2021-05-27 Dispositif électromagnétique avec boîtier de bobine et boîtier de bobine WO2022249411A1 (fr)

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PCT/JP2021/020282 WO2022249411A1 (fr) 2021-05-27 2021-05-27 Dispositif électromagnétique avec boîtier de bobine et boîtier de bobine

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PCT/JP2021/020282 WO2022249411A1 (fr) 2021-05-27 2021-05-27 Dispositif électromagnétique avec boîtier de bobine et boîtier de bobine

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4975012U (fr) * 1972-10-19 1974-06-28
JPS53127153U (fr) * 1977-03-18 1978-10-09
JPS5722416Y2 (fr) * 1977-01-19 1982-05-15
JPH0614441Y2 (ja) * 1989-07-07 1994-04-13 相原電機株式会社 端子台付き変圧器
JP2018152936A (ja) * 2017-03-10 2018-09-27 株式会社明電舎 突極形回転子の絶縁板
JP2021034512A (ja) * 2019-08-22 2021-03-01 ファナック株式会社 リアクトルおよびコイルケース

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4975012U (fr) * 1972-10-19 1974-06-28
JPS5722416Y2 (fr) * 1977-01-19 1982-05-15
JPS53127153U (fr) * 1977-03-18 1978-10-09
JPH0614441Y2 (ja) * 1989-07-07 1994-04-13 相原電機株式会社 端子台付き変圧器
JP2018152936A (ja) * 2017-03-10 2018-09-27 株式会社明電舎 突極形回転子の絶縁板
JP2021034512A (ja) * 2019-08-22 2021-03-01 ファナック株式会社 リアクトルおよびコイルケース

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