Reactor

Abstract

The present invention provides a reactor. The reactor comprises: an outer peripheral iron core; three leg iron cores, which are arranged on the inner surface side of the outer peripheral iron core and are spaced apart from each other in the circumferential direction; three coils, which are wound around the three leg iron cores in a one-to-one correspondence with the three leg iron cores, the three coils respectively having a coil end on the input side and a coil end on the output side protruding from the end surface of one end side of the same axial direction of the three leg iron cores, the three coils are two first coils having a first relative positional relationship between the protruding position of the coil end on the input side and the protruding position of the coil end on the output side, and a second coil having a second relative positional relationship between the protruding position of the coil end on the input side and the protruding position of the coil end on the output side that is opposite to the first relative positional relationship, and the winding directions of the three coils from the coil end on the input side to the coil end on the output side are opposite to each other in the first coil and the second coil.

Description

Technical Field

[0001] The present invention relates to a reactor, and more particularly to a reactor having a relay member between input and output terminals. Background Art

[0002] Reactors are mainly used in industrial robots and machine tools. They are installed between the power supply side (primary side) and the inverter, or between the load side (secondary side) such as motors and the inverter to reduce inverter failures and improve the power factor.

[0003] As a reactor that prevents magnetic flux from leaking to the outside, a three-phase reactor is disclosed: it has a central iron core, a peripheral iron core surrounding the central iron core, and at least three connecting parts that magnetically connect the central iron core and the peripheral iron core to each other, and the connecting parts are composed of one or more connecting iron cores, one or more coils wound on the connecting iron cores, and one or more gaps (for example, Japanese Patent Gazette No. 2017-059805).

[0004] In conventional reactors, the positions of the two terminals of the three coils are all the same. When the terminals of the three coils are connected to the terminal block by relay components, the shape of the relay components is complicated. In addition, when the relay components cross each other, there is a risk of short circuit due to vibration. Summary of the invention

[0005] Problem that the invention aims to solve

[0006] An object of the present invention is to provide a reactor capable of preventing a relay member connected to a terminal of a coil from becoming complicated in shape.

[0007] Solutions for solving problems

[0008] The inductor involved in the embodiment of the present disclosure comprises: an outer peripheral iron core; three leg iron cores, which are arranged on the inner surface side of the outer peripheral iron core and are arranged at intervals from each other in the circumferential direction; and three coils, which are wound around the three leg iron cores in a one-to-one correspondence with the three leg iron cores, the three coils respectively having a coil end on the input side and a coil end on the output side protruding from the end face on one end side of the same axial direction of the three leg iron cores, the three coils are two first coils whose protruding positions of the coil end on the input side and the protruding positions of the coil end on the output side at the portion protruding from the end face have a first relative positional relationship, and a second coil whose protruding positions of the coil end on the input side and the protruding positions of the coil end on the output side at the portion protruding from the end face have a second relative positional relationship opposite to the first relative positional relationship, and the winding directions of the three coils from the coil end on the input side to the coil end on the output side are opposite to each other in the first coil and the second coil.

[0009] Alternatively, the inductor further includes: three input terminals, which are individually connected to the coil end on the input side of the first coil and the coil end on the input side of the second coil; and three output terminals, which are individually connected to the coil end on the output side of the first coil and the coil end on the output side of the second coil, and the three input terminals and the three output terminals are arranged in a manner of being gathered toward opposite sides of each other at one end side in the axial direction.

[0010] The reactor may further include: a first relay member connecting the coil end on the input side to the input terminal; and a second relay member connecting the coil end on the output side to the output terminal.

[0011] The coil end on the input side may be directly connected to the input terminal, and the coil end on the output side may be directly connected to the output terminal.

[0012] Effects of the Invention

[0013] According to the reactor according to the embodiment of the present disclosure, the shape of the relay member connected to the terminal of the coil can be prevented from being complicated. Furthermore, since the relay members do not cross each other, the risk of short circuit due to vibration or the like can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A It is a perspective view of the reactor according to the first embodiment.

[0015] Figure 1B It is a top view of the reactor according to the first embodiment.

[0016] Figure 2 It is a top view of the reactor according to the first embodiment, from which a relay member is removed.

[0017] Figure 3A It is a perspective view of a reactor having a relay member of a complicated shape.

[0018] Figure 3B It is a top view of a reactor having a relay member of a complicated shape.

[0019] Figure 4 The reactor has a complex relay member and is a plan view of the reactor without the relay member.

[0020] Figure 5A This is a perspective view of a coil in which the coil ends have a first relative positional relationship.

[0021] Figure 5B This is a perspective view of a coil in which the coil ends have a second relative positional relationship.

[0022] Figure 6 It is a perspective view of the reactor involved in Example 2. DETAILED DESCRIPTION

[0023] Hereinafter, a reactor according to the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and their equivalents.

[0024] Figure 1A , which is a perspective view of a reactor 101 according to the first embodiment, Figure 1B 2 is a plan view of the reactor 101 according to the first embodiment. Figure 2 2 is a plan view of the reactor 101 according to the first embodiment, with the relay member removed. The reactor 101 according to the first embodiment includes an outer peripheral core 1 , three leg cores 21 , 22 , 23 , and three coils 31 , 32 , 33 .

[0025] The peripheral core 1 may be composed of three peripheral core parts 11, 12, 13, namely, the first peripheral core part 11, the second peripheral core part 12, and the third peripheral core part 13. The peripheral core 1 may have a substantially hexagonal annular structure. However, the peripheral core 1 may also be circular or other polygonal shapes.

[0026] The three leg cores 21, 22, and 23 are provided on the inner surface side of the outer peripheral core 1 and are arranged at intervals from each other in the circumferential direction. Figure 1A and Figure 1B As shown, the first peripheral core portion 11 and the first leg core 21 may be formed integrally, the second peripheral core portion 12 and the second leg core 22 may be formed integrally, and the third peripheral core portion 13 and the third leg core 23 may be formed integrally.

[0027] The three coils 31, 32, 33 are wound around the three leg cores 21, 22, 23 in a one-to-one correspondence with the three leg cores 21, 22, 23. The three coils 31, 32, 33 have coil ends 31a, 32a, 33a on the input side and coil ends 31b, 32b, 33b on the output side protruding from the end faces of the three leg cores 21, 22, 23 at one end in the same axial direction. The three coils 31, 32, 33 are two first coils 31, 33 having a first relative positional relationship between the protruding positions of the coil ends 31a, 33a on the input side and the protruding positions of the coil ends 31b, 33b on the output side at the portion protruding from the end face, and one second coil 32 having a second relative positional relationship opposite to the first relative positional relationship between the protruding positions of the coil ends 32a on the input side and the protruding positions of the coil ends 32b on the output side at the portion protruding from the end face, and the winding directions of the three coils from the coil ends on the input side to the coil ends on the output side are opposite to each other in the first coils 31, 33 and the second coil 32. The three coils 31, 32, 33 can be composed of flat wires, round wires, or twisted wires.

[0028] like Figure 2 As shown, the positional relationship between the coil ends 31a, 33a on the input side and the coil ends 31b, 33b on the output side of two first coils 31, 33 among the three coils, that is, the positional relationship between the coil end 31a on the input side and the coil end 31b on the output side of one first coil 31 and the positional relationship between the coil end 33a on the input side and the coil end 33b on the output side of the other first coil 33 is set as a first relative positional relationship. Furthermore, the positional relationship between the coil end 32a on the input side and the coil end 32b on the output side of a second coil 32 among the three coils 31, 32, 33 is set as a second relative positional relationship. At this time, the second relative positional relationship becomes a positional relationship opposite to the first relative positional relationship.

[0029] Specifically, when focusing on the distance from the center O of the peripheral core 1, the terminal 31a on the input side of the first coil 31 is closer to the center O than the terminal 31b on the output side, but the terminal 32a on the input side of the second coil 32 is farther from the center O than the terminal 32b on the output side. Furthermore, the first coil 31 and the first coil 33 are located at positions rotationally symmetrical with respect to the center O of the peripheral core 1, but the second coil 32 is not rotationally symmetrical with the first coils 31 and 33.

[0030] In addition, the inductor also includes three input terminals 61a, 62a, 63a that are individually connected to the coil ends 31a, 33a on the input side of the first coil 31, 33 and the coil end 32a on the input side of the second coil 32, and three output terminals 61b, 62b, 63b that are individually connected to the coil ends 31b, 33b on the output side of the first coil 31, 33 and the coil end 32b on the output side of the second coil 32. The three input terminals 61a, 62a, 63a and the three output terminals 61b, 62b, 63b can be configured to be gathered on opposite sides of each other at one end in the axial direction.

[0031] In addition, preferably, the inductor also includes first relay members 41a, 42a, 43a connecting the coil ends 31a, 32a, 33a on the input side to the input terminals 61a, 62a, 63a and second relay members 41b, 42b, 43b connecting the coil ends 31b, 32b, 33b on the output side to the output terminals 61b, 62b, 63b.

[0032] like Figure 1A and Figure 1B As shown, in the two first coils 31, 33, the protruding position of the coil end 31a, 33a on the input side at the portion protruding from the end surface and the protruding position of the coil end 31b, 33b on the output side are set to a first relative position relationship, and in a second coil 32, the protruding position of the coil end 32a on the input side at the portion protruding from the end surface and the protruding position of the coil end 32b on the output side are set to a second relative position relationship opposite to the first relative position relationship, thereby, the three first relay components 41a, 42a, 43a and the three second relay components 41b, 42b, 43b can be arranged in a non-intersecting manner.

[0033] Next, a reactor having a relay member having a complicated shape in which a first relay member and a second relay member overlap each other will be described. Figure 3A , which is a perspective view of a reactor 1000 having a relay member having a complicated shape, Figure 3B 2 is a plan view of a reactor 1000 having a relay member having a complicated shape. Figure 4 1 shows a reactor 1000 having a complex relay component, and is a top view of the reactor with the relay component removed. Figure 3A and Figure 3B The first relay member 42c and the second relay member 42d overlap in the portion surrounded by the dotted line A. The reason why the first relay member and the second relay member overlap is that the relative positional relationship between the coil ends 31a, 32c, 33a on the input side and the coil ends 31b, 32d, 33b on the output side of the coils 31, 320, 33 is the same in all three coils 31, 320, 33.

[0034] like Figure 3B As shown in FIG. 1 , the first relay member 42c connected to the coil end 32c on the input side of the coil 320 and the second relay member 42d connected to the coil end 32d on the output side of the coil 320 overlap. Figure 1B As shown, the first relay member 42a connected to the coil end 32a on the input side of the second coil 32 is arranged so as not to overlap with the second relay member 42b connected to the coil end 32b on the output side of the second coil 32.

[0035] Here, the positions of the coil end on the input side and the coil end on the output side of the coil having the first relative positional relationship and the coil end having the second relative positional relationship will be described. Figure 5A 2 is a perspective view of a first coil 31 as a coil having coil ends having a first relative positional relationship. Figure 5B , which is a perspective view of the second coil 32 as a coil having a second relative positional relationship between coil ends. Figure 5A and Figure 5B It can be seen that in the reactor 101 according to the first embodiment, the first relative positional relationship between the protruding position of the coil end 31a on the input side and the protruding position of the coil end 31b on the output side at the portion protruding from the end surface of the first coil 31 and the second relative positional relationship between the protruding position of the coil end on the input side and the protruding position of the coil end on the output side at the portion protruding from the end surface of the second coil 32 are opposite to each other. In addition, the winding direction from the coil end 31a on the input side to the coil end 31b on the output side of the first coil 31 and the winding direction from the coil end 32a on the input side to the coil end 32b on the output side of the second coil 32 are opposite to each other. Here, when the coil ends 31a and 32a are set as input terminals and the coil ends 31b and 32b are set as output terminals, the directions of the current flows in the first coil 31 and the second coil 32 are the same, so the direction of the magnetic field generated by the second coil 32 is the same as the direction of the magnetic field generated by the first coil 31.

[0036] According to the reactor of the first embodiment, the three first relay members and the three second relay members can be arranged so as not to intersect each other. Therefore, the first relay members and the second relay members are not short-circuited due to vibration or the like.

[0037] Next, a reactor according to Example 2 will be described. Figure 6, a perspective view of the reactor 102 according to the second embodiment is shown. The reactor 102 according to the second embodiment is different from the reactor 101 according to the first embodiment in that the coil ends 51a, 52a, 53a on the input side are directly connected to the input terminals 61a, 62a, 63a, and the coil ends 51b, 52b, 53b on the output side are directly connected to the output terminals 61b, 62b, 63b. The other structures of the reactor 102 according to the second embodiment are the same as those of the reactor 101 according to the first embodiment, so detailed description is omitted.

[0038] like Figure 6 As shown, it may be that the protruding position of the coil end on the input side of a first coil (for example, coil 31) among the three coils 31, 32, and 33 and the protruding position of the coil end on the output side have a first relative position relationship, and the protruding position of the coil end on the input side of the other two second coils (coils 32, 33) among the three coils and the protruding position of the coil end on the output side have a second relative position relationship opposite to the first relative position relationship.

[0039] The three coils 31 , 32 , 33 may be formed of flat wires, round wires, or litz wires.

[0040] According to the reactor involved in Example 2, the coil end on the input side is directly connected to the input terminal, and the coil end on the output side is directly connected to the output terminal. Therefore, the process of connecting the first relay component and the second relay component to the coil end on the input side and the coil end on the output side, respectively, can be omitted.

[0041] In the description of the first embodiment, an example is described in which the coils 31 and 33 are set as the first coil and the coil 32 is set as the second coil, but the present invention is not limited to such an example, and the coil 31 or the coil 33 may be set as the second coil. Furthermore, by replacing the coil end on the input side and the coil end on the output side, the reactor involved in the embodiment of the present disclosure can also be realized in the same manner.

Claims

1. A reactor, characterized in that: The reactor has: Peripheral iron core; three leg cores provided on the inner surface side of the outer peripheral core and arranged at intervals from each other in the circumferential direction; and three coils, which are wound around the three leg cores in one-to-one correspondence with the three leg cores, and the three coils respectively have a coil end on the input side and a coil end on the output side protruding from an end face on one end side of the three leg cores in the same axial direction, The three coils are two first coils whose protruding positions of the coil ends on the input side and the protruding positions of the coil ends on the output side at the parts protruding from the end surface have a first relative positional relationship, and a second coil whose protruding positions of the coil ends on the input side and the protruding positions of the coil ends on the output side at the parts protruding from the end surface have a second relative positional relationship opposite to the first relative positional relationship, and the winding directions of the three coils from the coil ends on the input side to the coil ends on the output side are opposite to each other in the first coil and the second coil.

2. The reactor according to claim 1, wherein: The reactor further includes: three input terminals, which are individually connected to the coil end on the input side of the first coil and the coil end on the input side of the second coil; and three output terminals, which are individually connected to the coil end on the output side of the first coil and the coil end on the output side of the second coil. The three input terminals and the three output terminals are arranged on one end side in the axial direction so as to be gathered on opposite sides to each other.

3. The reactor according to claim 2, wherein: The reactor further includes three first relay members connecting coil ends on the input side of the three coils to the three input terminals, respectively, and three second relay members connecting coil ends on the output side of the three coils to the three output terminals, respectively.

4. The reactor according to claim 2, wherein: The coil end on the input side is directly connected to the input terminal, and the coil end on the output side is directly connected to the output terminal.

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