JP7436226B2 - Reactor and cover including cover - Google Patents

Description

The present invention relates to a reactor including a cover and a cover.

In recent years, reactors have been developed that include a core body including an outer peripheral core and a plurality of cores arranged inside the outer peripheral core. A terminal block is installed in the core body, and the coil is connected to the terminal of the terminal block. A cover is attached to the terminal block to prevent workers from coming into contact with the terminals of the terminal block. For example, see Patent Document 1.

Japanese Patent Application Publication No. 2018-147982

A plurality of openings are formed in the cover. Cables to be connected to the terminals of the terminal block are inserted into these openings. When complying with a specific protection class of the Japanese Industrial Standards, for example, protection class IP2X, each of the plurality of openings needs to have an area large enough to prevent a human finger from entering. In order to comply with a certain degree of protection, it is necessary to provide the cover with an insulating protection extending along the cable from the top of the terminal block.

On the other hand, when it is not necessary to comply with the protection class IP2X, for example, when only the protection class IP1X is complied with, there is no need to provide the above-mentioned insulation protection part on the cover.

In other words, if it is necessary to comply with a certain protection class, for example protection class IP2X, a cover with an insulation protection part is prepared, and if it is not necessary to comply with such a protection class, a cover without insulation protection part is prepared. had to be prepared separately. For this reason, the manufacturer has to manage both the cover with the insulation protection part and the cover without the insulation protection part, which is complicated.

Therefore, there is a need for a cover that can be easily managed regardless of the degree of protection and a reactor equipped with such a cover.

According to a first aspect of the present disclosure, a core body is provided, and the core body is arranged to be in contact with an outer peripheral core and an inner surface of the outer peripheral core, or to be coupled to the inner surface of the outer peripheral core. It includes at least three iron cores and a coil wound around the iron cores, and there is a magnetic field between one of the at least three iron cores and another iron core adjacent to the one iron core. a terminal block configured to be connected to the coil and connected to a plurality of cables; a cover provided to cover the terminal block; and a cover provided to cover the terminal block; an insulation protection part extending from the cover along the cables, the insulation protection part including a support part that supports the plurality of cables, and a covering part that covers the plurality of cables, and the insulation protection part includes a support part that supports the plurality of cables, and a covering part that covers the plurality of cables, and The part is slidable inside the cover, or the sheathing part is slidable inside the cover, and the support part is rotatable about an axis perpendicular to the sliding direction of the sheathing part. A reactor is provided in which the

In a first embodiment, the insulation protection can be slid and rotated relative to the cover so that it can be used in accordance with a particular protection class, for example protection class IP2X. Likewise, if it is not necessary to comply with such a degree of protection, the insulation protection can be slid and rotated relative to the cover such that it is no longer available. Therefore, the manufacturer can manage the cover regardless of the protection class, which simplifies the management.

Objects, features, and advantages of the present invention will become more apparent from the following description of embodiments in conjunction with the accompanying drawings.

It is an end view of a reactor based on a first embodiment. FIG. 2 is an exploded perspective view of the reactor shown in FIG. 1. FIG. It is a perspective view of a reactor based on a first embodiment. It is a perspective view of a cover and a terminal block based on a first embodiment of the present invention. FIG. 3A is a first diagram for explaining the cover shown in FIG. 3A. FIG. 3B is a second diagram for explaining the cover shown in FIG. 3A. FIG. 7 is a diagram for explaining a modification of the first embodiment. It is a perspective view of a cover and a terminal block based on a second embodiment of the present invention. FIG. 4A is a diagram for explaining the cover shown in FIG. 4A. FIG. 7 is a perspective view of a cover and a terminal block in a modification of the second embodiment. FIG. 5A is a diagram for explaining the cover shown in FIG. 5A. It is a perspective view of a cover and a terminal block based on a third embodiment of the present invention. FIG. 6A is a first diagram for explaining the cover shown in FIG. 6A. FIG. 6A is a second diagram for explaining the cover shown in FIG. 6A. FIG. 6A is a third diagram for explaining the cover shown in FIG. 6A. FIG. 2 is a perspective view of a cover and a terminal block in the prior art. FIG. 3 is a perspective view of another cover and terminal block in the prior art. FIG. 7 is an end view of a reactor based on another embodiment.

Embodiments of the present disclosure will be described below with reference to the accompanying drawings. Corresponding components are given common reference numerals throughout the drawings.

In the following description, a three-phase reactor will be mainly explained as an example, but the application of the present disclosure is not limited to three-phase reactors, but can be widely applied to multi-phase reactors that require a constant inductance in each phase. be. Further, the reactor according to the present disclosure is not limited to being provided on the primary side and secondary side of an inverter in an industrial robot or a machine tool, but can be applied to various devices.

FIG. 1 is an end view of a reactor based on the first embodiment. As shown in FIG. 1, 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. Moreover, it is preferable that the number of iron cores is a multiple of 3, so that the reactor 5 can be used as a three-phase reactor. Note that the outer peripheral core 20 may have a polygonal shape or a circular shape.

Each of the iron core coils 31 to 33 includes an iron core 41 to 43 and a coil 51 to 53 wound around the iron core 41 to 43. The outer peripheral core 20 and the cores 41 to 43 are made by laminating a plurality of magnetic plates, such as iron plates, carbon steel plates, and electromagnetic steel plates, or are made from a dust core.

As can be seen from FIG. 1, the cores 41 to 43 have the same dimensions and are arranged at approximately equal intervals in the circumferential direction of the outer core 20. In FIG. 1, the radially outer ends of each of the cores 41 to 43 are in contact with the outer peripheral core 20 or are integrally formed therewith.

Furthermore, the radially inner ends of each of the cores 41 to 43 converge toward the center of the outer core 20, and the tip angle thereof is about 120 degrees. The radially inner ends of the cores 41 to 43 are spaced apart from each other via magnetically connectable gaps 101 to 103.

In other words, in the first embodiment, the radially inner end of the core 41 is spaced apart from the radially inner ends of the two adjacent cores 42 and 43 via the gaps 101 and 103. The same applies to the other cores 42 to 43. Note that, although it is ideal that the dimensions of the gaps 101 to 103 are equal to each other, they do not have to be equal. Furthermore, in the embodiments to be described later, the descriptions of the gaps 101 to 103, etc., and the descriptions of the iron core coils 31 to 33, etc. may be omitted.

In this way, in the first embodiment, the core coils 31 to 33 are arranged inside the outer peripheral core 20. In other words, the core coils 31 to 33 are surrounded by the outer peripheral core 20. Therefore, leakage of magnetic flux from the coils 51 to 53 to the outside of the outer peripheral core 20 can be reduced.

FIG. 2A is an exploded perspective view of the reactor shown in FIG. 1, and FIG. 2B is a perspective view of the reactor based on the first embodiment. As shown in these drawings, a mounting portion 90 with an end plate is attached to the lower end surface of the outer peripheral core 20. The attachment portion 90 serves to attach the reactor 5 to a predetermined position.

In FIG. 2A, two leads 51a-53a and 51b-53b extend from each of the coils 51-53. Leads 51a to 53a are on the input side, and leads 51b to 53b are on the output side. The leads 51a to 53a and 51b to 53b are each individually curved, so that the tips of the leads 51a to 53a and the leads 51b to 53b are aligned in a line. The tips of the leads 51a to 53a and 51b to 53b may be further curved for the purpose of connecting to terminals to be described later.

A terminal block 60 is shown above the outer peripheral core 20. The terminal block 60 has an outer shape that roughly corresponds to the outer peripheral core 20. The axial height of the terminal block 60 is greater than the protruding portions of the coils 51 to 53 from the outer peripheral core 20. The terminal block 60 has input side terminals 61a to 63a connected to the input side leads 51a to 53a, and output side terminals 61b to 63b connected to the output side leads 51b to 53b on its upper surface. . The input side terminals 61a to 63a are aligned on one edge of the upper surface of the terminal block 60. The output side terminals 61b to 63b are aligned on the other edge opposite to the aforementioned one edge. It is preferable that the input side terminals 61a to 63a and the output side terminals 61b to 63b are respectively aligned with the above-mentioned edges, but the aligned positions do not have to be the edges.

Furthermore, separation walls 65a and 65b are arranged on the upper surface of the terminal block 60. The isolation wall 65a is formed to isolate the input side terminals 61a to 63a from the output side terminals 61b to 63b, and to isolate the input side terminals 61a to 63a from each other. Similarly, the isolation wall 65b is formed to isolate the output side terminals 61b to 63b from the input side terminals 61a to 63a, and to isolate the output side terminals 61b to 63b from each other. Therefore, the separating walls 65a and 65b are comb-shaped and have the same shape. The separating walls 65a and 65b are arranged approximately line symmetrically to each other.

Furthermore, a cover 70 for preventing electric shock is shown above the terminal block 60. Cover 70 is preferably formed from an insulator. The cover 70 in the first embodiment has an outer shape roughly corresponding to the outer peripheral core 20, and has a plurality of vent holes 71 formed therein.

The leads 51a to 53a of the coils 51 to 53 are connected to the terminals 61a to 63a of the terminal block 60, and the leads 51b to 53b are connected to the terminals 61b to 63b of the terminal block 60. Then, the terminal block 60 is attached to the upper end surface of the outer peripheral core 20 and fixed with screws or a predetermined jig. Thereafter, the terminals 61a to 63a and 61b to 63b are connected to other cables (not shown in FIGS. 2A and 2B).

Next, the cover 70 is placed on the upper end surface of the terminal block 60. As shown in FIG. 2A, screws are passed through holes in the cover 70 and holes in the terminal block 60 and screwed together, thereby fixing the cover 70 to the terminal block 60. Note that the terminal block 60 may also be fixed to the outer peripheral core 20 in the same manner. Thereby, the reactor 5 shown in FIG. 2B is obtained.

In the first embodiment, since the cover 70 is attached to the terminal block 60, the operator does not come into contact with conductive parts such as terminals, thereby ensuring safety. Furthermore, since the vent hole 71 is formed in the cover 70, even if the coils 51 to 53 generate heat, the heat can be radiated through the vent hole 71.

FIG. 3A is a perspective view of a cover and a terminal block according to the first embodiment of the present disclosure. In FIG. 3A and other drawings to be described later, illustration of the reactor 5 is omitted for the purpose of brevity. As shown in FIG. 3A, the cover 70 includes an insulating protection portion 80 extending from the cover 70 along the cable C. Preferably, the insulation protection portion 80 is formed from the same material as the terminal block 60. The insulation protection part 80 serves to insulate and protect human fingers from the terminals of the terminal block 60, as will be described later. Cable C shown in FIG. 3A is connected to one terminal 63b of the terminal block 60. Note that in FIG. 3A and other drawings to be described later, cables are also connected to other terminals, but illustration thereof is omitted.

The insulation protection part 80 mainly includes a plate-shaped support part 82 that supports the lower surfaces of a plurality of cables, for example, three cables, and a covering part 81 that covers the plurality of cables. As shown in the figure, a plurality of notches are formed in the end surface of the covering portion 81, and these notches together with the support portion 82 form a plurality of openings 83, for example, three openings 83. Cables C are inserted into these openings 83. In FIG. 3A, dielectric protection 80 extends from cover 70 to prevent certain solid objects, such as a human finger, from reaching the terminals through opening 83. Therefore, a specific protection class of the Japanese Industrial Standards, for example protection class IP2X, can be complied with.

3B and 3C are diagrams for explaining the cover shown in FIG. 3A. The support portion 82 is rotatably connected to the lower end surface of the covering portion 81 . Therefore, as shown in FIG. 3B, the support part 82 is rotated around the axis A1 perpendicular to the direction in which the insulation protection part 80 extends.

Then, the covering portion 81 is slid in the direction of the arrow A2, which is the same as the direction in which the cable C extends. This allows the covering portion 81 to be at least partially housed within the cover 70, as shown in FIG. 3C. The support portion 82 hangs down from the lower end of the covering portion 81 along the side surface of the terminal block 60 . In this case, the insulation protection part 80 is generally housed in the cover 70 except for the support part 82. Since the cover 70 can be made smaller by the amount of the insulation protection part 80, this is advantageous when there is no need to comply with a specific protection class, for example protection class IP2X. Note that if there is no need to comply with a specific protection class, the metal fitting near the tip of the cable C may be exposed as shown in FIG. 3C.

Thus, in the first embodiment, the covering part 81 of the insulation protection part 80 is slidable with respect to the cover 70, and the support part 82 of the insulation protection part 80 is rotatable with respect to the cover 70. be. The insulation protection 80 can therefore be made available and unavailable depending on the need to comply with a particular protection class, for example protection class IP2X. Therefore, the manufacturer of the cover 70 can easily manage the cover 70 in common regardless of the protection grade, and the management can be simplified.

FIG. 7A is a perspective view of a cover and a terminal block in the prior art, and FIG. 7B is a perspective view of another cover and a terminal block in the prior art. In the prior art, unlike the first embodiment, both a cover 70A (see FIG. 7A) that does not include the insulation protection part 80' and a cover 70B (see FIG. 7B) that includes the insulation protection part 80' It was necessary to prepare. For this reason, the cover manufacturer had to select different covers 70A and 70B depending on the need to comply with the protection class, making management complicated.

By the way, FIG. 3D is a diagram for explaining a modification of the first embodiment. The modified example is the same as described above except that the support portion 82 does not rotate around the axis A1. In the modified example, when the covering part 81 is slid into the cover 70, the supporting part 82 protrudes from the cover 70 while supporting the cable C. Even in such a case, effects similar to those described above can be obtained and are included in the scope of the present disclosure.

FIG. 4A is a perspective view of a cover and a terminal block according to the second embodiment of the present disclosure, and FIG. 4B is a diagram for explaining the cover shown in FIG. 4A. In the second embodiment, the insulation protection part 80 is composed of two insulation protection parts 84A and 84B that are divided laterally. As shown, the dielectric protection portions 84A, 84B are preferably laterally bisected. However, the insulation protection portions 84A and 84B do not need to be divided into two halves; for example, the insulation protection portion 84A may include only one opening 83 and the insulation protection portion 84B may include two openings 83. good.

Each of the two insulation protection parts 84A and 84B is rotatable around two axes A3 parallel to the axial direction of the reactor 5. These axes A3 are arranged at both edges of the side surface of the cover 70 where the cable C is arranged. With such a configuration, when a particular protection class, for example protection class IP2X, is to be followed, the insulation protection part 80 extends from the cover 70 as shown in FIG. 4A. Then, when it is not necessary to comply with a specific protection class, for example, protection class IP2X, the two insulation protection parts 84A and 84B are rotated around the axis A3 so as to be separated from the cable C. It will be seen that the same effects as described above can be obtained in such a case as well. Note that the insulation protection portions 84A and 84B may be partially retracted as shown in a recess 75 described later. In this case, the cover 70 can be made smaller accordingly.

FIG. 5A is a perspective view of a cover and a terminal block in a modification of the second embodiment, and FIG. 5B is a diagram for explaining the cover shown in FIG. 5A. The insulation protection part 80 in these figures is a single member. The insulation protection part 80 is arranged at one edge of the side surface of the cover 70 where the cable C is arranged, and is rotatable around an axis A4 parallel to the axial direction of the reactor 5. Therefore, when it is not necessary to comply with a specific protection class, for example, protection class IP2X, the insulation protection part 80 is rotated about the axis A4 so as to be separated from the cable C. It will be seen that even in such a case, the same effects as described above can be obtained with a simple configuration.

FIG. 6A is a perspective view of a cover and a terminal block according to a third embodiment of the present disclosure, and FIGS. 6B to 6D are diagrams for explaining the cover shown in FIG. 6A. The insulation protection part 80 in the third embodiment is composed of a support part 82 similar to that described above, two side covering parts 85 and 86, and a central covering part 87 disposed between these parts. There is. The two side covering parts 85, 86 and the central covering part 87 constitute the covering part 81 described above. Furthermore, a recess 75 is formed in each of the two side surfaces of the cover 70 adjacent to the side surface on which the cable C is arranged. These recesses 75 are dimensioned to at least partially accommodate each of the lateral covering portions 85, 86.

As shown in FIG. 6B, the support part 82 is rotated around the axis A1 perpendicular to the direction in which the insulation protection part 80 extends. Next, the side covering portions 85 and 86 are rotated about the two axes A3 so as to separate from the cable C, respectively. This causes each of the lateral covering portions 85, 86 to be at least partially retracted into the recess 75 (FIG. 6C).

Next, the central covering portion 87 is slid in the direction of arrow A5. This causes central covering portion 87 to be at least partially retracted within cover 70, as shown in FIG. 6D. Therefore, as described above, the cover 70 can be made smaller by the size of the insulation protection part 80.

In the third embodiment as well, when a specific protection class, for example protection class IP2X, is to be followed, the insulating protection part 80 extends from the cover 70 as shown in FIG. 6A. When it is not necessary to comply with a specific protection class, for example, protection class IP2X, the side sheathing parts 85 and 86 are rotated away from the cable C, and the central sheathing part 87 is slid into the cover 70. let Therefore, it will be understood that the same effects as described above can be obtained in such a case as well.

FIG. 8 is an end view of a reactor based on another embodiment. The reactor 6 shown in FIG. 8 includes a substantially octagonal outer peripheral core 20 and four core coils 31 to 34 arranged inside the outer peripheral core 20 and similar to those described above. These iron core coils 31 to 34 are arranged at equal intervals in the circumferential direction of the core body 5. Further, the number of iron cores is preferably an even number of 4 or more, so that the reactor equipped with the reactor 6 shown in FIG. 8 can be used as a single-phase reactor.

As can be seen from the drawings, the outer peripheral core 20 is composed of four outer peripheral core parts 24 to 27 divided in the circumferential direction. Each of the core coils 31 to 34 includes a radially extending core 41 to 44 and a coil 51 to 54 attached to the core. The radially outer end portions of the cores 41 to 44 are integrally formed with the outer core portions 21 to 24, respectively. Note that the number of cores 41 to 44 and the number of outer core portions 24 to 27 do not necessarily have to match.

Furthermore, the radially inner end portions of each of the cores 41 to 44 are located near the center of the outer peripheral core 20. In FIG. 8, the radially inner ends of each of the cores 41 to 44 converge toward the center of the outer core 20, and the tip angle thereof is about 90 degrees. The radially inner ends of the cores 41 to 44 are spaced apart from each other via magnetically connectable gaps 101 to 104.

It will be obvious to those skilled in the art that a terminal block 60 and a cover 70 having a corresponding shape can be applied to the reactor shown in FIG. 8. Further, the cover 70 itself provided with the insulation protection portion 80 is also included in the scope of the present invention. Furthermore, in FIG. 2A and the like, an insulation protection part 80 is provided from one side of the cover 70. However, a similar insulating protection portion 80 may be provided on another side of the cover 70, for example, on a side opposite to the above-mentioned one side.

Aspects of the Present Disclosure According to a first aspect, a core body is provided, and the core body is in contact with or coupled to an outer peripheral core (20) and an inner surface of the outer peripheral core. The iron core includes at least three iron cores (41 to 44) arranged in the iron core and a coil (51 to 54) wound around the iron core, and one iron core of the at least three iron cores and one iron core of the one iron core. Magnetically connectable gaps (101 to 104) are formed between adjacent iron cores, and a terminal is connected to the coil and configured to be connected to a plurality of cables. A base (60), a cover (70) provided to cover the terminal block, and an insulation protection part (80) extending from the cover along the plurality of cables, the insulation protection part A reactor (5, 6) is provided, at least a portion of which is slidably provided with respect to the cover, or is provided slidably and rotatably with respect to the cover.
According to a second aspect, in the first aspect, the insulation protection part includes a support part that supports the plurality of cables and a covering part that covers the plurality of cables,
The covering portion was configured to be slidable inside the cover.
According to a third aspect, in the second aspect, the support part is rotatable around an axis perpendicular to the sliding direction of the covering part.
According to a fourth aspect, in the third aspect, at least a portion of the covering portion is rotatable around an axis parallel to the axial direction of the reactor.
According to a fifth aspect, in the first aspect, the insulation protection part is rotatable around an axis parallel to the axial direction of the reactor.
According to a sixth aspect, in the first aspect, the insulation protection part is composed of two insulation protection parts, and each of the two insulation protection parts is parallel to the axial direction of the reactor. It was designed to be able to rotate around two axes.
According to a seventh aspect, in a cover provided to cover a terminal block configured to be connected to a coil of a reactor and connected to a plurality of cables, the terminal block extends from the cover along the plurality of cables. an insulation protection part, at least a portion of the insulation protection part is provided to be slidable with respect to the cover, or provided to be slidable and rotatable with respect to the cover; Cover provided.
According to an eighth aspect, in the seventh aspect, the insulation protection section includes a support section that supports the plurality of cables, and a covering section that covers the plurality of cables, and the covering section is configured to cover the plurality of cables. so that it can be slid inside.
According to a ninth aspect, in the eighth aspect, the support part is rotatable around an axis perpendicular to the sliding direction of the covering part.
According to a tenth aspect, in the ninth aspect, at least a portion of the covering portion is rotatable around an axis parallel to the axial direction of the reactor.
According to an eleventh aspect, in the seventh aspect, the insulation protection part is rotatable around an axis parallel to the axial direction of the reactor.
According to a twelfth aspect, in the seventh aspect, the insulation protection part is configured of two insulation protection parts, and each of the two insulation protection parts is parallel to the axial direction of the reactor. It was designed to be able to rotate around two axes.

Although the embodiments of the present disclosure have been described above, those skilled in the art will understand that various modifications and changes can be made without departing from the scope of the disclosure of the claims described below.

5, 6 Reactor 20 Peripheral core 31-34 Core coil 41-44 Core 51-54 Coil 60 Terminal block 61a-63a, 61b-63b Terminal 70 Cover 71 Vent 75 Recess 80 Insulation protection part 81 Sheathing part 82 Support part 83 Openings 84A, 84B Insulation protection portions 85, 86 Side covering portions 87 Center covering portions 101 to 104 Gap

Claims (8)

The core body includes an outer peripheral core, at least three cores arranged to be in contact with or coupled to the inner surface of the outer peripheral core, and wound around the core. It includes a coil that has been
A magnetically connectable gap is formed between one of the at least three iron cores and another iron core adjacent to the one iron core,
Further, a terminal block configured to be connected to the coil and connected to a plurality of cables;
a cover provided to cover the terminal block;
an insulating protection part extending from the cover along the plurality of cables,
The insulation protection part includes a support part that supports the plurality of cables and a covering part that covers the plurality of cables,
The sheathing part is slidable inside the cover, or the sheathing part is slidable inside the cover and the support part rotates about an axis perpendicular to the sliding direction of the sheathing part. A reactor that can be moved . The reactor according to claim 1 , wherein at least a portion of the covering portion is rotatable around an axis parallel to an axial direction of the reactor. The reactor according to claim 1, wherein the insulation protection part is rotatable around an axis parallel to the axial direction of the reactor. The insulation protection part is composed of two insulation protection parts,
The reactor according to claim 1, wherein each of the two insulation protection parts is rotatable around two axes parallel to the axial direction of the reactor. In a cover provided to cover a terminal block configured to be connected to a coil of a reactor and connected to multiple cables,
an insulating protection portion extending from the cover along the plurality of cables;
The insulation protection part includes a support part that supports the plurality of cables and a covering part that covers the plurality of cables,
The sheathing part is slidable inside the cover, or the sheathing part is slidable inside the cover and the support part rotates about an axis perpendicular to the sliding direction of the sheathing part. A cover that is movable . The cover according to claim 5 , wherein at least a portion of the covering portion is rotatable around an axis parallel to the axial direction of the reactor. The cover according to claim 5 , wherein the insulation protection part is rotatable around an axis parallel to the axial direction of the reactor. The insulation protection part is composed of two insulation protection parts,
6. The cover according to claim 5 , wherein each of the two insulation protection parts is rotatable around two axes parallel to the axial direction of the reactor.

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