Reactor

Abstract

The present invention provides a reactor. Regardless of the diameter of the cable to be connected to the current-carrying part, it is possible to prevent an operator from easily contacting the terminals of the current-carrying part. The reactor includes an outer peripheral iron core, at least three iron cores, and a coil wound on the iron core. The reactor also includes a current-carrying part connected to the coil and to the cable, and a cover body provided to cover the current-carrying part. At least one adjustment member for adjusting the area of ​​the notch is at least partially provided in at least one notch formed in the cover body. The adjustment member is configured to be cut from the notch or bent relative to the surface where the notch is formed.

Description

Technical Field

[0001] The invention relates to a reactor with a cover. Background Art

[0002] Usually, the core body includes an outer peripheral iron core and a plurality of iron cores arranged inside the outer peripheral iron core and wound with a coil. In addition, the reactor mainly includes such a core body, a conducting part connected to the coil and connected to the cable, and a cover body installed on the conducting part for preventing electric shock. The plurality of terminals included in the conducting part are respectively connected to the lead wires extending from the coil.

[0003] Here, for reactors, the cross-sectional area of ​​the cable used is sometimes specified according to the standard to which it complies (for example, compliance / noncompliance with the North American standard: NFPA). Taking the North American standard: NFPA as an example, the cross-sectional area of ​​the cable becomes larger when the same standard is complied with than when it is not complied with.

[0004] Since there is almost no gap between the cover and the cable when using a cable with a larger cross-sectional area, the operator will not come into contact with the terminals of the current-carrying part of the reactor. However, when using a cable with a smaller cross-sectional area, there is a problem that the operator's fingers may enter the gap between the cover and the cable and come into contact with the terminals of the current-carrying part.

[0005] Japanese Patent Publication No. 2019-29443 discloses that a cover for electric shock protection has a retractable member that fills the gap. Due to the presence of such a retractable member, regardless of the diameter of the cable to be connected to the power supply unit, it is possible to prevent the operator from contacting the terminal of the power supply unit. Summary of the invention

[0006] Problem that the invention aims to solve

[0007] However, in Japanese Patent Application Laid-Open No. 2019-29443, when the operator presses the retractable member, the retractable member is easily deformed, so the operator may come into contact with the terminal of the current-carrying part, etc. and be in danger.

[0008] Therefore, it is desirable to provide a reactor that can prevent an operator from easily coming into contact with a terminal or the like of the current-carrying portion, regardless of the diameter of a cable to be connected to the current-carrying portion.

[0009] Solutions for solving problems

[0010] According to the first technical solution, a reactor is provided, characterized in that the reactor has a core body, the core body includes an outer peripheral iron core, at least three iron cores arranged in a manner of being connected to the inner surface of the outer peripheral iron core or combined with the inner surface, and a coil wound on the iron core, a gap capable of magnetic coupling is formed between one of the at least three iron cores and other iron cores adjacent to the one iron core, the reactor also has: a current-carrying part, which is configured to be connected to the coil and to a cable; and a cover body, which is configured to cover the current-carrying part, at least one notch formed in the cover body, at least partially provided with at least one adjusting member for adjusting the area of ​​the notch, the at least one adjusting member being configured to be cut from the notch or bent relative to the surface where the notch is formed.

[0011] According to a second technical solution, in the first technical solution, the at least one adjusting member is formed integrally with the cover body, and the at least one adjusting member and the cover body are connected via a perforated portion or a thin-walled portion.

[0012] According to a third aspect, in the first aspect, the reactor includes a plurality of the adjusting members arranged sequentially in a radial direction of the cable, and the plurality of the adjusting members are connected via a perforated portion or a thin-walled portion.

[0013] According to a fourth aspect, in the first aspect, the at least one adjusting member is composed of a plurality of small adjusting members sequentially arranged in a circumferential direction of the notch.

[0014] According to the fifth technical solution, in any one of the first to fourth technical solutions, the number of the at least three iron cores is a multiple of three.

[0015] According to a sixth technical solution, in any one of the first to fourth technical solutions, the number of the at least three cores is an even number greater than 4.

[0016] Effects of the Invention

[0017] In the first technical solution, the adjusting member is cut or bent according to the diameter of the cable to be connected, thereby connecting the cable to the power-carrying part and adjusting the gap between the opening of the cover and the cable to a minimum. Therefore, regardless of the diameter of the cable to be connected to the power-carrying part, it is possible to prevent the operator from easily contacting the terminal of the power-carrying part.

[0018] In the second aspect, the adjustment member can be easily cut and bent.

[0019] In the third aspect, by cutting and bending at least one of the plurality of adjustment members, it is possible to easily cope with cables of various sizes.

[0020] In the fourth aspect, it is possible to easily cope with cables having complex cross sections.

[0021] In the fifth aspect, the reactor can be used as a three-phase reactor.

[0022] In the sixth aspect, the reactor can be used as a single-phase reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The objects, features and advantages of the present invention will become more apparent from the following description of the embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This is an end view of the reactor according to the first embodiment.

[0025] Figure 2A yes Figure 1 An exploded perspective view of the reactor shown.

[0026] Figure 2B This is a perspective view of the reactor according to the first embodiment.

[0027] Figure 3A This is an enlarged view of the notch formed in the cover.

[0028] Figure 3B It is connected with a cable with a smaller cross-sectional area. Figure 3A Same picture.

[0029] Figure 3C It is connected with a cable with a larger cross-sectional area. Figure 3A Same picture.

[0030] Figure 4A It is a cross-sectional view of a notch formed in a cover body in another embodiment.

[0031] Figure 4B It is another cross-sectional view of a notch formed in a cover body in another embodiment.

[0032] Figure 5 This is an enlarged view of a cover of the reactor according to the second embodiment.

[0033] Figure 6 yes Figure 5 An enlarged view of the closure member of the cover is shown.

[0034] Fig. 7A is a first partial enlarged view of the closing member.

[0035] Figure 7B It is a second partial enlarged view of the closing component.

[0036] Figure 7C It is a third partial enlarged view of the closing component.

[0037] Figure 8 It is an enlarged view of a closing member of a cover body according to a modified example.

[0038] Fig. 9 This is a cross-sectional view of a reactor according to still another embodiment. DETAILED DESCRIPTION

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following drawings, the same components are denoted by the same reference numerals. For ease of understanding, the scales of these drawings are appropriately changed.

[0040] Figure 1 is an end view of the reactor based on the first embodiment. Figure 1 As shown, the reactor 5 includes an outer peripheral core 20 having a hexagonal cross section and at least three core coils 31 to 33 arranged inside the outer peripheral core 20. In addition, it is preferred that the number of cores is a multiple of 3, thereby enabling the reactor 5 to be used as a three-phase reactor. In addition, the outer peripheral core 20 may also be polygonal or circular.

[0041] The core coils 31 to 33 include cores 41 to 43 and coils 51 to 53 wound around the cores 41 to 43. The peripheral core 20 and the cores 41 to 43 are made of a plurality of stacked magnetic plates, such as iron plates, carbon steel plates, and electromagnetic steel plates, or are made of powdered iron cores.

[0042] Depend on Figure 1 It can be seen that the iron cores 41 to 43 have the same size as each other and are arranged at substantially equal intervals in the circumferential direction of the outer peripheral iron core 20. Figure 1 In the embodiment, radially outer ends of the respective iron cores 41 to 43 are in contact with or formed integrally with the outer peripheral iron core 20 .

[0043] The radial inner ends of the cores 41 to 43 converge toward the center of the outer peripheral core 20, and the tip angle is about 120 degrees. The radial inner ends of the cores 41 to 43 are separated from each other via gaps 101 to 103 that enable magnetic coupling.

[0044] In other words, in the first embodiment, the radial inner end of the core 41 is separated from the radial inner end of each of the two adjacent cores 42 and 43 by gaps 101 and 103. The same is true for the other cores 42 to 43. In addition, it is ideal that the sizes of the gaps 101 to 103 are equal to each other, but their sizes may not be equal. In addition, in the embodiments described below, the markings of the gaps 101 to 103 and the markings of the core coils 31 to 33 and the like are sometimes omitted.

[0045] As described above, in the first embodiment, the core coils 31 to 33 are arranged inside the outer core 20. In other words, the core coils 31 to 33 are surrounded by the outer core 20. Therefore, leakage of magnetic flux from the coils 51 to 53 to the outside of the outer core 20 can be reduced.

[0046] Figure 2A yes Figure 1 The exploded perspective view of the reactor shown in FIG. Figure 2B 3D is a perspective view of the reactor according to the first embodiment. As shown in these figures, a mounting portion 90 with an end plate is mounted on the lower end surface of the peripheral core 20. The mounting portion 90 serves to mount the reactor 5 at a predetermined position. In addition, the reactor 5 may not include the mounting portion 90.

[0047] exist Figure 2A In the embodiment, two leads 51a to 53a and 51b to 53b extend from coils 51 to 53, respectively. Leads 51a to 53a are input sides, and leads 51b to 53b are output sides. Furthermore, leads 51a to 53a and 51b to 53b are bent individually, so that the top ends of leads 51a to 53a and leads 51b to 53b are arranged in a row, respectively. In order to connect to the terminals described later, the top ends of leads 51a to 53a and 51b to 53b may be further bent.

[0048] The conducting part 60 is shown above the peripheral core 20. The conducting part 60 has an outer shape that roughly corresponds to the peripheral core 20. The axial height of the conducting part 60 is greater than the protruding portion of the coils 51 to 53 protruding from the peripheral core 20. The conducting part 60 has an input side terminal connected to the leads 51a to 53a on the input side and an output side terminal connected to the leads 51b to 53b on the output side on its upper surface. These input side terminals and output side terminals are connected to the leads 51a to 53a and the leads 51b to 53b of the coils 51 to 53, respectively. Furthermore, the conducting part 60 is configured to be connected to a cable described later.

[0049] Furthermore, a cover 70 for preventing electric shock is shown above the conducting part 60. Preferably, the cover 70 is formed of an insulator, such as a hard resin. The cover 70 in the first embodiment has an outer shape roughly corresponding to the outer peripheral core 20. On the side of the cover 70, a notch 75 is formed at a position corresponding to the input side terminal of the conducting part 60 and a position corresponding to the output side terminal.

[0050] Furthermore, at least one vent 71 is formed on the upper surface of the cover 70. The vent 71 serves to dissipate heat when the coils 51 to 53 generate heat. Preferably, the vent 71 has an area that is inaccessible to human fingers according to the protection level IP2 of the Japanese Industrial Standard. Alternatively, preferably, the vent 71 has an area that is inaccessible to human hands according to the protection level IP1 of the Japanese Industrial Standard. Thus, the safety of the operator can be ensured.

[0051] Furthermore, the vent 71 may be a hole into which only a tool, in particular, only a probe of the tool can enter. That is, a tool, such as a tester, can be passed through such a hole to contact the terminal to measure voltage or the like.

[0052] The lead wires 51a to 53a of the coils 51 to 53 are connected to the input side terminals of the power supply unit 60, and the lead wires 51b to 53b are connected to the output side terminals of the power supply unit 60. Then, the power supply unit 60 is mounted on the upper end surface of the outer peripheral core 20 and fixed with screws or a predetermined jig. Thereafter, the input side terminals and the output side terminals are connected to the cables described later.

[0053] Next, the cover 70 is disposed on the upper end surface of the current-carrying portion 60. Figure 2A As shown, the hole 79 formed in the cover 70 corresponds to the hole 69 formed on the upper surface of the power supply portion 60. The screw is passed through these holes 79 and 69 to be threaded together, thereby fixing the cover 70 to the power supply portion 60. In addition, the power supply portion 60 can also be fixed to the outer peripheral iron core 20 in the same manner. Thus, Figure 2B The reactor 5 is shown.

[0054] Figure 3A is an enlarged view of the notch formed in the cover. Figure 3A As shown, the notch 75 forms an opening together with the upper surface of the current-carrying portion 60. The notch 75 may also be in other shapes. In addition, at least one adjusting member 80 for adjusting the area of ​​the notch 75 is provided at least partially on the inner surface of the notch 75. Figure 3A In the embodiment of the present invention, the adjusting member 80 extends along the circumference of the notch 75 .

[0055] Furthermore, in Figure 3A In the embodiment, the adjusting member 80 and the cover 70 are connected by means of a perforated portion 89A, and the perforated portion 89A includes at least one perforated hole and a connecting portion adjacent to the perforated hole. Preferably, the adjusting member 80 and the perforated portion 89A are formed as one body with the cover 70. The thickness of the connecting portion may also be less than the thickness of the adjusting member 80 and the thickness of the cover 70.

[0056] Figure 3B It is connected with a cable with a smaller cross-sectional area. Figure 3A The same picture. Figure 3B In the embodiment, the cable 91 with a small cross-sectional area, for example, a cable not conforming to NFPA, is inserted into the notch 75 and connected to the input-side terminal or the output-side terminal of the power supply unit 60 by a known method. Since the adjustment member 80 is provided on the inner surface of the notch 75, there is almost no gap between the inner surface of the notch 75 and the cable 91. Therefore, even when the cable 91 with a small cross-sectional area is passed through the notch 75 and connected to the aforementioned terminal, it is possible to prevent the operator's fingers from entering the gap between the notch 75 and the cable and contacting the terminal of the power supply unit 60.

[0057] However, it is not possible to insert a cable 92 having a larger cross-sectional area, such as a cable compliant with NFPA. Figure 3A as well as Figure 3B The notch 75 shown. In this regard, Figure 3C It is connected with a cable with a larger cross-sectional area. Figure 3A The same picture. Figure 3C , the adjustment member 80 is removed.

[0058] As described above, the adjusting member 80 is connected to the notch 75 by means of the perforated portion 89A. Since the strength of the perforated portion 89A is smaller than the strength of the cover 70 and the adjusting member 80, the operator can grasp the adjusting member 80 with his fingers and easily cut it off from the cover 70. Figure 3C The area of ​​the notch 75 shown becomes larger than Figure 3A as well as Figure 3B Therefore, even for a cable 92 with a large cross-sectional area, it is possible to pass through the notch 75 and connect to the terminal of the power supply unit 60. Since there is almost no gap between the inner surface of the notch 75 and the cable 92 even in this case, it is possible to prevent the operator's fingers from entering the gap between the notch 75 and the cable and contacting the terminal of the power supply unit 60.

[0059] As described above, in the present disclosure, the adjustment member 80 is divided according to the diameter of the cables 91 and 92 to be connected, thereby connecting the cables 91 and 92 to the power supply unit, and adjusting the gap between the cables 91 and 92 and the notch 75 of the cover 70 to the minimum. Therefore, regardless of the diameter of the cables 91 and 92 to be connected to the power supply unit 60, it is possible to prevent the operator from easily contacting the terminal of the power supply unit 60.

[0060] in addition, Figure 4A FIG. 4 is a cross-sectional view of a notch formed in a cover body in another embodiment. Figure 4AIn the embodiment, the adjusting member 80 and the cover 70 are connected by the thin-walled portion 89B. The thickness of the thin-walled portion 89B is smaller than the thickness of the adjusting member 80 and the thickness of the cover 70. In addition, it is preferred that the thickness of the adjusting member 80 and the thickness of the cover 70 are substantially the same or the thickness of the adjusting member 80 is between the thickness of the cover 70 and the thickness of the thin-walled portion 89B. Furthermore, as described above, it is preferred that the adjusting member 80 and the thin-walled portion 89B are formed integrally with the cover 70.

[0061] Figure 4B FIG. 1 is another cross-sectional view of a notch formed in the cover body in another embodiment. Figure 4B It is known that the operator may also grasp the adjusting member 80 and bend it about 90° from the thin-walled portion 89B relative to the cover 70. It is known that even in this case, the same effect as the aforementioned embodiment can be obtained. In addition, in order to further prevent the operator from contacting the terminal of the conducting portion 60, etc., it is preferred to bend the adjusting member 80 toward the outside of the cover 70.

[0062] Figure 5 This is an enlarged view of a cover of the reactor according to the second embodiment. Figure 5 The recess 75 is shown to be completely closed by the adjustment member 80 .

[0063] Furthermore, Figure 6 yes Figure 5 The enlarged view of the closing member of the cover shown in FIG. In the second embodiment, a plurality of, for example, three, adjusting members 81 to 83 are shown. These adjusting members 81 to 83 extend along the circumference of the notch 75 and are located at the cable ( Figure 6 The adjusting members 82 and 83 may be removed from the beginning and the notch 75 may be closed only partially.

[0064] The adjustment member 81 extends along the circumference of the notch 75 and is connected to the notch 75 via the perforated portion 89A. Similarly, the adjustment member 82 extends along the circumference of the notch 75 and is connected to the adjustment member 81 via the perforated portion 89A. Similarly, the adjustment member 83 extends along the circumference of the notch 75 and is connected to the adjustment member 82 via the perforated portion 89A.

[0065] Figure 7A to Figure 7C This is a partial enlarged view of the closed component. Fig. 7AIn the embodiment, the adjusting member 83 is cut apart from the adjusting member 82. Therefore, the cable 90A having a relatively small diameter can be appropriately inserted into the notch 75 formed by cutting the adjusting member 83 and connected to the aforementioned terminal. Since there is almost no gap between the cable 90A and the notch 75, the operator's fingers and the like will not enter the gap between the notch 75 and the cable 90A, and the operator will not come into contact with the terminal and the like of the current-carrying portion 60.

[0066] exist Figure 7B In the embodiment, the adjusting members 82 and 83 are separated from the adjusting member 81. Therefore, the cable 90B having a relatively large diameter can be appropriately inserted into the notch 75 formed by separating the adjusting members 82 and 83 and connected to the aforementioned terminal. Since there is almost no gap between the cable 90B and the notch 75 as described above, the operator's fingers and the like will not enter the gap between the notch 75 and the cable 90B.

[0067] exist Figure 7C In the embodiment, all the adjusting members 81 to 83 are cut apart from the notch 75. Therefore, a cable 90C with a larger diameter (e.g., a cable conforming to the North American standard: NFPA) can be properly inserted into the notch 75 formed by cutting the adjusting members 81 to 83 and connected to the aforementioned terminal. Since there is almost no gap between the cable 90C and the notch 75 as described above, the operator's fingers and the like will not enter the gap between the notch 75 and the cable 90C.

[0068] As described above, in the second embodiment, some or all of the plurality of adjusting members 81 to 83 are cut apart, thereby ensuring the safety of the operator even when cables of various sizes are inserted. In addition, even when the thin-walled portion 89B is used instead of the perforated portion 89A and at least one of the adjusting members 81 to 83 is bent, the same effect can be obtained.

[0069] Furthermore, Figure 8 FIG. 1 is an enlarged view of the closing member of the cover of the modified example. Figure 8 In the embodiment, the adjusting member 81 is composed of a plurality of small adjusting members 81a to 81f arranged in sequence in the circumferential direction of the notch 75. Similarly, the adjusting member 82 is composed of a plurality of small adjusting members 82a to 82f arranged in sequence in the circumferential direction of the notch 75, and the adjusting member 83 is composed of a plurality of small adjusting members 83a to 83f arranged in sequence in the circumferential direction of the notch 75.

[0070] The plurality of small adjustment members 81a to 81f of the adjustment member 81 are connected via the perforated portion 89A or the thin-walled portion 89B. The same is true for the plurality of small adjustment members 82a to 82f and 83a to 83f of the other adjustment members 82 and 83.

[0071] When it is necessary to insert a cable having a complicated cross section into the notch 75, the operator can cut or bend at least one of the small adjustment members 81a to 83f in accordance with the complicated cross section. Therefore, even for a cable having a complicated cross section, such a cable can be easily inserted into the notch 75, and as a result, the same effect as the above-mentioned embodiment can be obtained.

[0072] Fig. 9 It is a cross-sectional view of a reactor 5 according to still another embodiment. Fig. 9 The reactor 5 shown includes an outer peripheral iron core 20 having a substantially octagonal shape, and four iron core coils 31 to 34 similar to the aforementioned iron core coils arranged inside the outer peripheral iron core 20. These iron core coils 31 to 34 are arranged at equal intervals in the circumferential direction of the reactor 5. In addition, it is preferred that the number of iron cores is an even number of 4 or more, thereby enabling the reactor 5 to be used as a single-phase reactor.

[0073] As can be seen from the drawings, each core coil 31-34 includes a core 41-44 extending in the radial direction and a coil 51-54 wound around the core. The radial outer end of each core 41-44 is connected to the outer peripheral core 20 or is formed integrally with the outer peripheral core 20.

[0074] Furthermore, the radial inner end of each of the iron cores 41 to 44 is located near the center of the outer peripheral iron core 20. Fig. 9 In the embodiment, the radial inner ends of the cores 41 to 44 converge toward the center of the outer peripheral core 20, and the tip angle is about 90 degrees. The radial inner ends of the cores 41 to 44 are separated from each other by gaps 101 to 104 that enable magnetic coupling.

[0075] In such Fig. 9 The outer peripheral core of the iron core having an even number of 4 or more is shown with a current-carrying portion 60 of the same structure mounted on one end surface of the iron core, and a cover 70 of the same structure is further mounted on the current-carrying portion 60. For such a reactor 5 as well, regardless of the diameter of the cable to be connected to the current-carrying portion, it is possible to prevent the operator from easily contacting the current-carrying portion for the same reason as described above.

[0076] Although the embodiments of the present invention have been described above, it should be understood by those skilled in the art that various modifications and changes can be made without departing from the scope of the disclosure of the claims.

Claims

1. A reactor, characterized in that: The reactor includes a core body including an outer peripheral iron core, at least three iron cores arranged in contact with or combined with an inner surface of the outer peripheral iron core, and a coil wound around the iron core. A gap capable of magnetic coupling is formed between one of the at least three cores and another core adjacent to the one core. The reactor also features: a current supply unit connected to the coil and to a cable; and a cover body composed of a single member configured to cover the current-carrying portion, At least one notch is formed only on the side of the cover body, and at least one adjusting member is arranged on the side of the cover body, extending along the circumference of the notch and adjusting the area of ​​the notch. The at least one adjustment member is configured to be cut from the notch or to be bent relative to a surface where the notch is formed.

2. The reactor according to claim 1, characterized in that: The at least one adjusting member is formed integrally with the cover body, The at least one adjusting member and the cover body are connected via a thin-walled portion or a perforated portion.

3. The reactor according to claim 1, characterized in that: The at least one adjusting member is a plurality of adjusting members arranged sequentially in the radial direction of the cable, The plurality of adjusting members are connected via the perforated portion or the thin-walled portion.

4. The reactor according to claim 1, characterized in that: The at least one adjusting member is composed of a plurality of small adjusting members sequentially arranged in the circumferential direction of the notch.

5. The reactor according to any one of claims 1 to 4, characterized in that: The number of the at least three cores is a multiple of 3.

6. The reactor according to any one of claims 1 to 4, characterized in that: The number of the at least three cores is an even number greater than 4.

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