JP2011176253A - Induction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction apparatus including cores which are easily manufactured. <P>SOLUTION: A projection 18 is protrusively provided on the center of a distal end face 151 in the width direction of a central magnetic leg 15 of a first E-shaped core 12, A projection 23 is protrusively provided on the center of a distal end face 201 in the width direction of a central magnetic leg 20 of a second E-shaped core 13. The projection 23 is formed in the same shape and in the same size as the projection 18 at a side of the first E-shaped core 12. The first E-shaped core 12 and the second E-shaped core 13 have the same shape and the same size. The first E-shaped core 12 is formed symmetric laterally, and the second E-shaped core 13 is formed symmetric laterally. A distal end face 181 of the projection 18 at a side of the central magnetic leg 15 and a distal end face 231 of the projection 23 at a side of the central magnetic leg 20 are surface-joined. The projection 18 at the side of the first E-shaped core 12 and the projection 23 at a side of the second E-shaped core 13 form a gap G1 between the distal end face 151 of the central magnetic leg 15 and the distal end face 201 of the central magnetic leg 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an induction device in which a pair of cores having a plurality of magnetic legs are combined to face each other.

  In this type of reactor disclosed in Patent Document 1 (a kind of core of induction equipment and EE type core), it is necessary to provide a gap to ensure an inductance in a large current region. In Patent Documents 2 and 3, an EI type core is disclosed, and a gap having a through hole shape is provided in the central magnetic leg of the EI type core. Such a through hole-shaped gap can be applied to the EE type core.

JP 2005-150414 A JP 7-183134 A JP 2007-165346 A

However, it is difficult to form a through-hole-shaped gap with high accuracy, and it is not easy to manufacture the core.
An object of this invention is to provide the induction | guidance | derivation apparatus provided with the core with easy manufacture.

  The present invention is directed to an induction device in which a pair of cores having a plurality of magnetic legs are combined to face each other. In the invention of claim 1, a gap forming convex portion is provided at the tip of at least one of the plurality of magnetic legs. The pair of cores have the same shape and the same size and are rotationally symmetrically combined.

  In a state where the pair of cores are combined, a gap is formed between the magnetic leg to be joined to the gap forming convex part and the magnetic leg provided with the gap forming convex part. The formation of the gap-forming convex portion is easier than the formation of the through-hole-shaped gap, and the pair of cores have the same shape and the same size, so that the core is easily manufactured.

In a preferred example, the core is a so-called U-shaped core having a pair of magnetic legs.
In a preferred example, the core is a so-called E-type core having a central magnetic leg and a pair of outer magnetic legs provided on both sides of the central magnetic leg, and the central magnetic leg and the pair of outer magnetic legs. A gap forming convex portion is provided at the tip of at least one of the legs.

In a preferred example, the gap forming convex portion is provided at the tip of the central magnetic leg.
In a preferred example, the gap forming convex portion is single.
The formation of a single gap forming convex portion is the simplest.

In a preferred example, the core is symmetrical.
The symmetrical configuration contributes to avoiding a mistake in assembling the pair of cores.

  The present invention has an excellent effect that an induction device having a core that can be easily manufactured can be provided.

1A is a perspective view of an EE type reactor core according to a first embodiment. (B) is a top view. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The top view which shows another embodiment. The partially abbreviated plan view showing another embodiment. The partially abbreviated plan view showing another embodiment. The top view which shows another embodiment. The top view which shows another embodiment. The top view which shows another embodiment.

Hereinafter, a first embodiment in which the present invention is embodied in a reactor will be described with reference to the drawings.
As shown in FIGS. 1 (a) and 1 (b), a reactor core 11 provided in a reactor as an induction device is an EE type core in which a first E type core 12 and a second E type core 13 are combined to face each other. Configured.

  The first E-type core 12 includes a hexahedral main body 14, a hexahedral central magnetic leg 15, and a pair of outer magnetic legs (a hexahedral first outer magnetic leg 16 and a hexahedral second outer magnetic leg 17). And. The central magnetic leg 15 is connected to the central portion of the inner surface 141 in the length direction of the main body portion 14 (the direction indicated by the arrow R1). The first outer magnetic leg 16 is connected to one end in the length direction R1 of the inner surface 141, and the second outer magnetic leg 17 is connected to the other end in the length direction R1 of the inner surface 141. The central magnetic leg 15, the first outer magnetic leg 16, and the second outer magnetic leg 17 are perpendicular to the main body portion 14 and extend parallel to each other. The length L1 of the first outer magnetic leg 16 and the length L2 of the second outer magnetic leg 17 are the same, and the width H1 of the first outer magnetic leg 16 and the width H2 of the second outer magnetic leg 17 are the same. is there. The length L3 of the central magnetic leg 15 is shorter than the lengths L1 and L2 of the first outer magnetic leg 16 and the second outer magnetic leg 17. The interval W1 between the central magnetic leg 15 and the first outer magnetic leg 16 and the interval W2 between the central magnetic leg 15 and the second outer magnetic leg 17 are the same.

  A convex portion 18 projects from the central portion of the distal end surface 151 in the width direction of the central magnetic leg 15 (the direction indicated by the arrow R1). The distance from the inner surface 141 of the main body 14 to the tip of the convex portion 18 is equal to the lengths L1 and L2 of the first outer magnetic leg 16 and the second outer magnetic leg 17.

  The second E-type core 13 includes a hexahedral body 19, a hexahedral center magnetic leg 20, and a pair of outer magnetic legs (a hexahedral first outer magnetic leg 21 and a hexahedral second outer magnetic leg 22). And. The central magnetic leg 20 is connected to the central portion of the inner surface 191 in the length direction of the main body portion 19 (the direction indicated by the arrow R1). The first outer magnetic leg 21 is connected to one end of the inner surface 191 in the length direction R1 and the second outer magnetic leg 22 is connected to the other end of the inner surface 191 in the length direction R1. The central magnetic leg 20, the first outer magnetic leg 21, and the second outer magnetic leg 22 are perpendicular to the main body portion 19 and extend parallel to each other.

  The length L 4 of the first outer magnetic leg 21 and the length L 5 of the second outer magnetic leg 22 are the same as the lengths L 1 and L 2 of the first outer magnetic leg 16 and the second outer magnetic leg 17. The width H 3 of the first outer magnetic leg 21 and the width H 4 of the second outer magnetic leg 22 are the same as the widths H 1 and H 2 of the first outer magnetic leg 16 and the second outer magnetic leg 17. The length L6 of the central magnetic leg 20 is the same as the length L3 of the central magnetic leg 15. The length L6 of the central magnetic leg 20 is shorter than the lengths L4 and L5 of the first outer magnetic leg 21 and the second outer magnetic leg 22. The width H5 of the central magnetic leg 15 and the width H6 of the central magnetic leg 20 are the same. The interval W3 between the central magnetic leg 20 and the first outer magnetic leg 21 and the interval W4 between the central magnetic leg 20 and the second outer magnetic leg 22 are the same as the intervals W1 and W2.

  A convex portion 23 projects from the central portion of the tip surface 201 in the width direction of the central magnetic leg 20 (the direction indicated by the arrow R1). The convex portion 23 has the same shape and size as the convex portion 18 on the first E type core 12 side, and the first E type core 12 and the second E type core 13 have the same shape and size. The cross-sectional shape of the protrusions 18 and 23 (the shape on a virtual plane parallel to the width direction indicated by the arrow R1 and perpendicular to the thickness direction of the E-shaped cores 12 and 13 indicated by the arrow R2 in FIG. It is a rectangle. The first E-type core 12 has a bilaterally symmetric shape about a center line 150 that divides the central magnetic leg 15 into two equal parts in the width direction. The second E-type core 13 divides the central magnetic leg 20 into two equal parts in the width direction. The center line 200 is symmetrical with respect to the center line 200.

  The central magnetic leg 15 of the first E-type core 12 and the central magnetic leg 20 of the second E-type core 13 are opposed to each other, and the front end surface 181 of the convex portion 18 on the central magnetic leg 15 side and the convex on the central magnetic leg 20 side. The front end surface 231 of the part 23 is surface-bonded. The front end surface 161 of the first outer magnetic leg 16 and the front end surface 221 of the second outer magnetic leg 22 are surface-bonded, and the front end surface 171 of the second outer magnetic leg 17 and the front end surface of the first outer magnetic leg 21 are joined. 211 is surface-bonded.

  The first E-type core 12 and the second E-type core 13 having the same shape and the same size are rotated by 180 ° around the center of the tip surfaces 181 and 231 in the width direction of the convex portions 18 and 23 (direction indicated by the arrow R1). It is combined symmetrically. The convex portion 18 on the first E-type core 12 side and the convex portion 23 on the second E-type core 13 side combined in this rotational symmetry are the tip surface 151 of the central magnetic leg 15 and the tip surface 201 of the central magnetic leg 20. A gap G1 is formed between the two.

The first E-type core 12 and the second E-type core 13 have a laminated structure in which electromagnetic steel sheets are laminated, or a compacted structure in which powder is molded.
The coil 10 is wound around the central magnetic leg 15 of the first E-type core 12 and the central magnetic leg 20 of the second E-type core 13. This constitutes a reactor.

In the first embodiment, the following effects can be obtained.
(1) When forming a through-hole-shaped gap in a laminated structure, it is necessary to form a through-hole in the magnetic steel sheet by press forming. When forming a through-hole-shaped gap in a dust structure, a through-hole is formed. It is necessary to mold. When the through-hole-shaped gap is a small hole or a narrow gap, it is not easy to form a through-hole-shaped gap with high shape accuracy in either the laminated structure or the compacted structure.

  On the other hand, the formation of the gap-forming convex portions 18 and 23 is easier than the formation of the through-hole-shaped gap in both the laminated structure and the compacted structure in terms of obtaining high shape accuracy.

  Further, the first E-type core 12 and the second E-type core 13 have the same shape and size. Therefore, in the laminated structure, a press mold for forming the first E-type core 12 and the second E-type core 13 can be shared, and in the compacted structure, the first E-type core 12 and the second E-type core 13 are formed. Can be shared.

Therefore, the manufacture of the reactor core 11 having an EE type core is easy.
(2) The formation of the single convex portion 18 with respect to the first E-type core 12 and the formation of the single convex portion 23 with respect to the second E-type core 13 are the simplest in obtaining the desired gap G1.

  (3) Since the first E-type core 12 and the second E-type core 13 have a bilaterally symmetrical shape, there is no possibility of an assembly error in the operation of combining the first E-type core 12 and the second E-type core 13 facing each other.

  (4) If the convex portions 18 and 23 on the front end surfaces 151 and 201 of the central magnetic legs 15 and 20 are arranged at the center of the front end surfaces 151 and 201 in the width direction of the central magnetic legs 15 and 20, both are symmetrical. become. That is, the configuration in which the protrusions 18 and 23 are provided at the tips of the center magnetic legs 15 and 20 is the simplest in making the first E-type core 12 and the second E-type core 13 symmetrical.

In the present invention, the embodiments shown in FIGS. 2 to 24 are also possible. In any of the embodiments shown in FIGS. 2 to 21, the first E-type core and the second E-type core have the same shape and the same size.
In the first E-type core 12A and the second E-type core 13A shown in FIG. Are offset from each other. The front end surface 181 of the convex portion 18A and the front end surface 201 of the central magnetic leg 20 are surface bonded, and the front end surface 231 of the convex portion 23A and the front end surface 151 of the central magnetic leg 15 are surface bonded. A gap G <b> 2 is formed between the front end surface 151 and the front end surface 201. The first E-type core 12A and the second E-type core 13A are asymmetrical.

  In the first E type core 12B and the second E type core 13B shown in FIG. 3, the end surfaces 181 and 231 of the convex portions 18B and 23B projecting from the end surfaces 151 and 201 of the central magnetic legs 15 and 20 are partially mutually connected. Surface bonded. A gap G3 is formed between the distal end surface 151 and the distal end surface 201. The first E type core 12B and the second E type core 13B are asymmetrical.

  In the first E type core 12 </ b> C and the second E type core 13 </ b> C shown in FIG. 4, the protrusions 18 </ b> C and 23 </ b> C projecting from the front end surfaces 151 and 201 of the central magnetic legs 15 and 20 Are offset from each other. The front end surface 181 of the convex portion 18C and the front end surface 201 of the central magnetic leg 20 are surface bonded, and the front end surface 231 of the convex portion 23C and the front end surface 151 of the central magnetic leg 15 are surface bonded. The side surface 182 of the convex portion 18C and the side surface 232 of the convex portion 23C are in contact with each other. A gap G4 is formed between the distal end surface 151 and the distal end surface 201.

  Positioning protrusions 24 and 25 are provided on the front end surface 161 of the first outer magnetic leg 16 and the front end surface 221 of the second outer magnetic leg 22 so as to be shifted left and right. Positioning projections 26 and 27 are provided on the distal end surface 171 of the second outer magnetic leg 17 and the distal end surface 211 of the first outer magnetic leg 21 so as to be shifted left and right. There is no gap between the first outer magnetic leg 16 and the second outer magnetic leg 22, and there is no gap between the second outer magnetic leg 17 and the first outer magnetic leg 21, and the positioning protrusions 24, 25 The side surfaces 241 and 251 are in contact with each other, and the side surfaces 261 and 271 of the positioning protrusions 26 and 27 are in contact with each other.

  The first E-type core 12C and the second E-type core 13C are asymmetrical. When the first E-type core 12C and the second E-type core 13C are joined, the first E-type core 12C and the second E-type core 13C are mutually connected. There is no deviation in the left-right direction.

  In the first E-type core 12D and the second E-type core 13D shown in FIG. 5, the front end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18D and 23D project from the front end surfaces 161 and 211 of the first outer magnetic legs 16 and 21, respectively. The front end surface 181 of the convex portion 18D and the front end surface 221 of the second outer magnetic leg 22 are surface bonded, and the front end surface 231 of the convex portion 23D and the front end surface 171 of the second outer magnetic leg 17 are surface bonded. Has been. A gap G5 is formed between the distal end surface 161 and the distal end surface 221, and a gap G6 is formed between the distal end surface 171 and the distal end surface 211. The first E-type core 12D and the second E-type core 13D are asymmetrical.

  In the first E-type core 12F and the second E-type core 13F shown in FIG. 6, the front end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18F1 and 23F1 project from the front end surfaces 161 and 211 of the first outer magnetic legs 16 and 21, and convex portions 18F2 and 23F2 exist on the front end surfaces 171 and 221 of the second outer magnetic legs 17 and 22, respectively. Projected. The front end surfaces 186 and 233 of the convex portions 18F1 and 23F2 are surface bonded, and the front end surfaces 183 and 236 of the convex portions 18F2 and 23F1 are surface bonded. A gap G 7 is formed between the front end surfaces 161 and 221, and a gap G 8 is formed between the front end surfaces 171 and 211. The first E type core 12F and the second E type core 13F are symmetrical.

  In the first E-type core 12H and the second E-type core 13H shown in FIG. 7, the positioning projections 28 and 29 projecting from the front end surfaces 151 and 201 of the center magnetic legs 15 and 20 are formed in the width direction of the center magnetic legs 15 and 20. Are offset from each other. The front end surface 281 of the positioning protrusion 28 and the front end surface 201 of the central magnetic leg 20 are surface bonded, and the front end surface 291 of the positioning protrusion 29 and the front end surface 151 of the central magnetic leg 15 are surface bonded. The side surface 282 of the positioning protrusion 28 and the side surface 292 of the positioning protrusion 29 are in contact with each other. There is no gap between the tip surface 151 and the tip surface 201.

  Convex portions 18H1 and 23H1 project from the tip surfaces 161 and 211 of the first outer magnetic legs 16 and 21, and convex portions 18H2 and 23H2 are provided on the tip surfaces 171 and 221 of the second outer magnetic legs 17 and 22, respectively. Projected. The convex portions 18H1 and 23H2 are shifted to the left and right, and the convex portions 18H2 and 23H1 are shifted to the left and right. The side surfaces 184 and 234 of the convex portions 18H1 and 23H2 are in contact with each other, and the side surfaces 185 and 235 of the convex portions 18H2 and 23H1 are in contact with each other. A gap G9 is formed between the tip surfaces 161 and 221 and a gap G10 is formed between the tip surfaces 171 and 211.

  The first E type core 12H and the second E type core 13H are asymmetrical. In a state where the first E-type core 12H and the second E-type core 13H are joined, the first E-type core 12H and the second E-type core 13H do not shift in the left-right direction.

  In the first E-type core 12J and the second E-type core 13J shown in FIG. 8, the protrusion 18J1 protruding from the front end surface 161 of the first outer magnetic leg 16 and the front end surface 221 of the second outer magnetic leg 22 are provided. The projected portions 23J2 are shifted from each other in the width direction of the outer magnetic legs 16 and 22. A convex portion 18J2 projecting from the distal end surface 171 of the second outer magnetic leg 17 and a convex portion 23J1 projecting from the distal end surface 211 of the first outer magnetic leg 21 are formed in the width direction of the outer magnetic legs 17, 21. Are offset from each other. A gap G11 is formed between the front end surfaces 161 and 221 and a gap G12 is formed between the front end surfaces 171 and 211. The front end surfaces 151 and 201 of the center magnetic legs 15 and 20 are surface-bonded to each other. The first E type core 12J and the second E type core 13J are asymmetrical.

  In the first E-type core 12K and the second E-type core 13K shown in FIG. 9, a pair of convex portions 18K1 and 18K2 project from the tip surface 161 of the first outer magnetic leg 16, and the tip of the first outer magnetic leg 21 A pair of convex portions 23K1 and 23K2 protrude from the surface 211. A gap G <b> 13 is formed between the front end surfaces 161 and 221, and a gap G <b> 14 is formed between the front end surfaces 171 and 211. The front end surfaces 151 and 201 of the center magnetic legs 15 and 20 are surface-bonded to each other. The first E type core 12K and the second E type core 13K are asymmetrical.

  In the first E-type core 12M and the second E-type core 13M shown in FIG. 10, a pair of convex portions 18M1 and 18M2 project from the front end surface 161 of the first outer magnetic leg 16, and the front end of the first outer magnetic leg 21 A pair of convex portions 23M1 and 23M2 project from the surface 211. A positioning projection 30 projects from the distal end surface 171 of the second outer magnetic leg 17, and a positioning projection 31 projects from the distal end surface 221 of the second outer magnetic leg 22.

  The positioning projection 30 is fitted between the pair of convex portions 23M1 and 23M2, and the positioning projection 31 is fitted between the pair of convex portions 18M1 and 18M2. The distal end surface 311 and the distal end surface 161 of the positioning projection 31 are separated from each other, and the distal end surface 301 and the distal end surface 211 of the positioning projection 30 are separated from each other. A gap G15 is formed between the distal end surface 311 and the distal end surface 161 of the positioning projection 31, and a gap G16 is formed between the distal end surface 301 and the distal end surface 211 of the positioning projection 30. The front end surfaces 151 and 201 of the center magnetic legs 15 and 20 are surface-bonded to each other. The first E type core 12M and the second E type core 13M are asymmetrical. In a state in which the first E-type core 12M and the second E-type core 13M are joined, the first E-type core 12M and the second E-type core 13M do not shift in the left-right direction.

  In the first E type core 12N and the second E type core 13N shown in FIG. 11, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Protrusions 18N and 23N project from the front end surfaces 161 and 211 of the first outer magnetic legs 16 and 21, respectively. The convex portion 23N has the same shape and size as the convex portion 18N on the first E type core 12N side, and the first E type core 12N and the second E type core 13N have the same shape and size. The cross-sectional shape of the protrusions 18N and 23N (the shape on a virtual plane parallel to the width direction indicated by the arrow R1 and perpendicular to the paper surface of FIG. 11 (the thickness direction of the cores 12N and 13N)) is a trapezoid. Yes, the base width of the convex portions 18N, 23N is smaller than the width of the first outer magnetic legs 16, 21.

  The tip surface 181 of the convex portion 18N and the tip surface 221 of the second outer magnetic leg 22 are surface-bonded, and the tip surface 231 of the convex portion 23N and the tip surface 171 of the second outer magnetic leg 17 are surface-bonded. Has been. A gap G17 is formed between the distal end surface 161 and the distal end surface 221, and a gap G18 is formed between the distal end surface 171 and the distal end surface 211. The first E type core 12N and the second E type core 13N are asymmetrical.

  In the first E-type core 12P and the second E-type core 13P shown in FIG. 12, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18P and 23P project from the distal end portions of the first outer magnetic legs 16 and 21. The convex portion 23P has the same shape and size as the convex portion 18P on the first E-type core 12P side, and the first E-type core 12P and the second E-type core 13P have the same shape and size. The cross-sectional shapes of the convex portions 18P and 23P are trapezoidal, and the base width of the convex portions 18P and 23P is the same as the width of the first outer magnetic legs 16 and 21.

  The front end surface 181 of the convex portion 18P and the front end surface 221 of the second outer magnetic leg 22 are surface bonded, and the front end surface 231 of the convex portion 23P and the front end surface 171 of the second outer magnetic leg 17 are surface bonded. Has been. A gap G19 is formed between the convex portion 18P (the front end portion of the first outer magnetic leg 16) and the front end surface 221, and the front end surface 171 and the convex portion 23P (the front end portion of the first outer magnetic leg 21) A gap G20 is formed between them. The first E type core 12P and the second E type core 13P are asymmetrical.

  In the first E-type core 12Q and the second E-type core 13Q shown in FIG. 13, the front end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18Q and 23Q project from the distal ends of the first outer magnetic legs 16 and 21. The convex portion 23Q has the same shape and size as the convex portion 18Q on the first E type core 12Q side, and the first E type core 12Q and the second E type core 13Q have the same shape and size. The cross-sectional shape of the convex portions 18Q and 23Q is a shape where the side surface is tapered while changing from a convex curved surface to a concave curved surface, and the base width of the convex portions 18Q and 23Q is the same as the width of the first outer magnetic legs 16 and 21. It is.

  The front end surface 181 of the convex portion 18Q and the front end surface 221 of the second outer magnetic leg 22 are surface bonded, and the front end surface 231 of the convex portion 23Q and the front end surface 171 of the second outer magnetic leg 17 are surface bonded. Has been. A gap G21 is formed between the convex portion 18Q and the front end surface 221, and a gap G22 is formed between the front end surface 171 and the convex portion 23Q. The first E type core 12Q and the second E type core 13Q are asymmetrical.

  In the first E-type core 12S and the second E-type core 13S shown in FIG. 14, the front end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18S and 23S project from the distal ends of the first outer magnetic legs 16 and 21. The convex portion 23S has the same shape and size as the convex portion 18S on the first E-type core 12S side, and the first E-type core 12S and the second E-type core 13S have the same shape and size. The cross-sectional shape of the convex portions 18S and 23S is a trapezoid in which one side surface of the first outer magnetic legs 16 and 21 is inclined, and the base width of the convex portions 18S and 23S is the first outer magnetic leg 16. , 21 is the same as the width.

  The front end surface 181 of the convex portion 18S and the front end surface 221 of the second outer magnetic leg 22 are surface bonded, and the front end surface 231 of the convex portion 23S and the front end surface 171 of the second outer magnetic leg 17 are surface bonded. Has been. A gap G23 is formed between the convex portion 18S and the front end surface 221, and a gap G24 is formed between the front end surface 171 and the convex portion 23S. The first E type core 12S and the second E type core 13S are asymmetrical.

  In the first E type core 12T and the second E type core 13T shown in FIG. 15, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18T and 23T project from the tip portions of the first outer magnetic legs 16 and 21. The convex portion 23T has the same shape and size as the convex portion 18T on the first E type core 12T side, and the first E type core 12T and the second E type core 13T have the same shape and size. The cross-sectional shape of the convex portions 18T and 23T is a shape in which the tips of the first outer magnetic legs 16 and 21 are convex curved surfaces, and the base width of the convex portions 18T and 23T is the width of the first outer magnetic legs 16 and 21. Same as width.

  The tip of the convex portion 18T and the tip surface 221 of the second outer magnetic leg 22 are line-bonded, and the tip of the convex portion 23T and the tip surface 171 of the second outer magnetic leg 17 are line-bonded. A gap G25 is formed between the convex portion 18T and the tip surface 221, and a gap G26 is formed between the tip surface 171 and the convex portion 23T. The first E type core 12T and the second E type core 13T are asymmetrical.

  In the first E-type core 12Φ and the second E-type core 13Φ shown in FIG. 16, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18Φ and 23Φ are projected from the tip portions of the first outer magnetic legs 16 and 21. The convex portion 23Φ has the same shape and size as the convex portion 18Φ on the first E-type core 12Φ side, and the first E-type core 12Φ and the second E-type core 13Φ have the same shape and size. The cross-sectional shape of the convex portions 18Φ, 23Φ is a semicircular arc, and the base width of the convex portions 18Φ, 23Φ is the same as the width of the first outer magnetic legs 16, 21.

  The tip of the convex portion 18Φ and the tip surface 221 of the second outer magnetic leg 22 are line-joined, and the tip of the convex portion 23Φ and the tip surface 171 of the second outer magnetic leg 17 are line-joined. A gap G27 is formed between the convex portion 18Φ and the tip surface 221, and a gap G28 is formed between the tip surface 171 and the convex portion 23Φ. The first E-type core 12Φ and the second E-type core 13Φ are asymmetrical.

  In the first E type core 12V and the second E type core 13V shown in FIG. 17, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18 </ b> V and 23 </ b> V project from the tip portions of the first outer magnetic legs 16 and 21. The convex portion 23V has the same shape and size as the convex portion 18V on the first E type core 12V side, and the first E type core 12V and the second E type core 13V have the same shape and size. The cross-sectional shapes of the convex portions 18V and 23V are 1 / n arcs (n is a number larger than 2 and n = 4 in the illustrated example), and the base width of the convex portions 18V and 23V is the first The width of the outer magnetic legs 16 and 21 is the same.

  The tip of the convex portion 18V and the tip surface 221 of the second outer magnetic leg 22 are line-bonded, and the tip of the convex portion 23V and the tip surface 171 of the second outer magnetic leg 17 are line-joined. A gap G29 is formed between the convex portion 18V and the tip surface 221. A gap G30 is formed between the tip surface 171 and the convex portion 23V. The first E-type core 12V and the second E-type core 13V are asymmetrical.

  In the first E-type core 12X and the second E-type core 13X shown in FIG. 18, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. A pair of convex portions 18X1 and 18X2 project from the distal end surface 161 of the first outer magnetic leg 16, and a pair of convex portions 23X1 and 23X2 project from the distal end surface 211 of the first outer magnetic leg 21. Yes. The convex portions 23X1 and 23X2 have the same shape and size as the convex portions 18X1 and 18X2 on the first E-type core 12X side, and the first E-type core 12X and the second E-type core 13X have the same shape and size. The cross-sectional shape of the convex portions 18X1, 18X2, 23X1, and 23X2 is a 1 / m arc (m is a number of 2 or more, and n = 2 in the illustrated example).

  The tips of the convex portions 18X1 and 18X2 and the tip surface 221 of the second outer magnetic leg 22 are line-joined, and the tips of the convex portions 23X1 and 23X2 and the tip surface 171 of the second outer magnetic leg 17 are line-joined. Has been. A gap G31 is formed between the distal end surface 161 and the distal end surface 221, and a gap G32 is formed between the distal end surface 171 and the distal end surface 211. The first E type core 12X and the second E type core 13X are asymmetrical.

  In the first E-type core 12Y and the second E-type core 13Y shown in FIG. 19, the lengths of the first outer magnetic legs 16Y and 21Y (refer to the lengths L1 and L4 in FIG. 1B of the first embodiment) and The lengths of the second outer magnetic legs 17Y and 22Y (refer to the lengths L2 and L5 in FIG. 1B of the first embodiment) are different. Convex portions 18Y and 23Y project from the first outer magnetic legs 16 and 21. A gap G <b> 33 is formed between the front end surfaces 161 and 221, and a gap G <b> 34 is formed between the front end surfaces 171 and 211.

  In the first E-type core 12Z and the second E-type core 13Z shown in FIG. 20, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18Z and 23Z project from the tip portions of the first outer magnetic legs 16 and 21. The convex portion 23Z has the same shape and size as the convex portion 18Z on the first E-type core 12Z side. The cross-sectional shape of the convex portions 18Z and 23Z is an isosceles triangle, and the base width of the convex portions 18Z and 23Z is the same as the width of the first outer magnetic legs 16 and 21.

  Concave surfaces 32Z and 33Z are formed at the distal ends of the second outer magnetic legs 17 and 22, respectively. The concave surface 33Z has the same shape and size as the concave surface 32Z on the first E-type core 12Z side, and the first E-type core 12Z and the second E-type core 13Z have the same shape and size. The cross-sectional shape of the concave surfaces 32Z and 33Z is an isosceles triangle isosceles, and the apex angle θ1 of the isosceles sides of the concave surfaces 32Z and 33Z is larger than the apex angle θ2 of the isosceles triangle of the convex portions 18Z and 23Z.

  The top of the convex portion 18Z and the bottom of the concave surface 33Z are line-joined, and the top of the convex portion 23Z and the bottom of the concave surface 32Z are line-joined. In a state where the first E-type core 12Z and the second E-type core 13Z are joined, the first E-type core 12Z and the second E-type core 13Z do not shift in the left-right direction.

  A gap G35 is formed between the convex portion 18Z and the concave surface 33Z, and a gap G36 is formed between the convex portion 23Z and the concave surface 32Z. The first E type core 12Z and the second E type core 13Z are asymmetrical.

  In the first E type core 12 Γ and the second E type core 13 Γ shown in FIG. 21, the end surfaces 151, 201 of the center magnetic legs 15, 20 are surface-bonded. Convex portions 18Γ and 23Γ are projected from the tips of the first outer magnetic legs 16 and 21. The convex portion 23Γ has the same shape and size as the convex portion 18Γ on the first E-type core 12Γ side. The cross-sectional shape of the convex portions 18Γ and 23Γ is a circular arc, and the base width of the convex portions 18Γ and 23Γ is the same as the width of the first outer magnetic legs 16 and 21.

  Concave surfaces 32Γ and 33Γ are formed at the distal ends of the second outer magnetic legs 17 and 22, respectively. The concave surface 33Γ has the same shape and size as the concave surface 32Γ on the first E-type core 12Γ side, and the first E-type core 12Γ and the second E-type core 13Γ have the same shape and size. The cross-sectional shape of the concave surfaces 32Γ and 33Γ is an arc, and the radius of curvature of the arc of the concave surfaces 32Γ and 33Γ is larger than the radius of curvature of the arc of the convex portions 18Γ and 23Γ.

  The top of the convex portion 18Γ and the bottom of the concave surface 33Γ are line-joined, and the top of the convex portion 23Γ and the bottom of the concave surface 32Γ are line-joined. A gap G37 is formed between the convex portion 18Γ and the concave surface 33Γ, and a gap G38 is formed between the convex portion 23Γ and the concave surface 32Γ. The first E-type core 12Γ and the second E-type core 13Γ are asymmetric.

Next, the embodiment of FIG. 22 will be described.
A reactor core 34 provided in a reactor as a guide device is configured by a UU core in which a first U core 35 and a second U core 36 are combined to face each other.

  The first U-shaped core 35 includes a connecting portion 37 and a pair of magnetic legs (a first magnetic leg 38 and a second magnetic leg 39). The length L7 of the first magnetic leg 38 and the length L8 of the second magnetic leg 39 are the same, the width H7 of the first magnetic leg 38 (the length in the direction indicated by the arrow R1) and the length of the second magnetic leg 39. The width H8 (the length in the direction indicated by the arrow R1) is the same. A convex portion 45 projects from the central portion of the distal end surface 381 in the width direction of the first magnetic leg 38 (the direction indicated by the arrow R1).

  The second U-type core 36 includes a connecting portion 40 and a pair of magnetic legs (a first magnetic leg 41 and a second magnetic leg 42). The length L9 of the first magnetic leg 41 and the length L10 of the second magnetic leg 42 are the same as the lengths L7 and L8, and the width H9 (the length in the direction indicated by the arrow R1) of the first magnetic leg 41 and The width H10 of the second magnetic leg 42 (the length in the direction indicated by the arrow R1) is the same as the widths H7 and H8. A convex portion 46 projects from the central portion of the distal end surface 411 in the width direction of the first magnetic leg 41 (the direction indicated by the arrow R1).

  The first magnetic leg 38 of the first U-shaped core 35 and the second magnetic leg 42 of the second U-shaped core 36 are opposed to each other, and the tip surface 451 of the convex portion 45 and the tip surface 421 of the second magnetic leg 42 are arranged. Surface bonding. The first magnetic leg 41 of the second U-shaped core 36 and the second magnetic leg 39 of the first U-shaped core 35 are opposed to each other, and the distal end surface 461 of the convex portion 46 and the distal end surface 391 of the first magnetic leg 39 are arranged. Surface bonding.

  The first U-shaped core 35 and the second U-shaped core 36 having the same shape and the same size are combined in a rotational symmetry of 180 °. Thus, the convex part 45 by the side of the 1st U-type core 35 combined in rotational symmetry forms the gap G39 between the front end surface 381 of the first magnetic leg 38 and the front end surface 421 of the second magnetic leg 42. The convex portion 46 on the second U-shaped core 36 side forms a gap G 40 between the front end surface 411 of the first magnetic leg 41 and the front end surface 391 of the second magnetic leg 39.

  A coil 43 is provided on the first magnetic leg 38 of the first U-type core 35 and the second magnetic leg 42 of the second U-type core 36 so as to surround the magnetic legs 38 and 42. A coil 44 is provided on the second magnetic leg 39 of the first U-type core 35 and the first magnetic leg 41 of the second U-type core 36 so as to surround the magnetic legs 39 and 41. This constitutes a reactor.

In this embodiment, the same effect as the items (1) and (2) in the first embodiment can be obtained.
Next, the embodiment of FIG. 23 will be described.
In the first U-type core 35Δ and the second U-type core 36Δ shown in FIG. 23, the lengths of the first magnetic legs 38Δ and 41Δ (see lengths L7 and L9 in FIG. 22) and the lengths of the second magnetic legs 39Δ and 42Δ are used. [See lengths L8 and L10 in FIG. 22]. Other configurations are the same as those of the embodiment of FIG.

Next, the embodiment of FIG. 24 will be described.
In the first U-shaped core 35Λ and the second U-shaped core 36Λ shown in FIG. 24, the protrusions 45Λ, 46Λ having the same shape as the convex portions 18Q, 23Q in the embodiment of FIG. A gap G41 is formed between the protrusion 45Λ and the tip surface 421, and a gap G42 is formed between the protrusion 46Λ and the tip surface 391.

In the present invention, the following embodiments are also possible.
A gap may be provided between the center magnetic legs 15 and 20, between the first outer magnetic leg 16 and the second outer magnetic leg 22, and between the first outer magnetic leg 21 and the second magnetic leg 39. Good.

The gap forming structure of the outer magnetic leg of each embodiment of FIGS. 6 and 8 to 21 may be applied to the UU type core.
The present invention may be applied to a transformer having an EE type core.

The present invention may be applied to a transformer having a UU type core.
The technical idea that can be grasped from the embodiment described above will be described below.
(A) The core is asymmetrical, and the tip of the gap forming convex portion of one of the pair of cores and the tip of the other gap forming convex portion of the pair of cores are not joined. The induction device according to claim 3.

(B) The guidance device according to claim 3, wherein the gap forming convex portion is provided at a tip of the outer magnetic leg.
(C) The guidance device according to claim 3, wherein a plurality of the gap forming convex portions are provided at a tip of the outer magnetic leg.

  (D) The core is left-right asymmetric and is provided with positioning protrusions that prevent the first E-type core and the 2E-type core from shifting in the left-right direction. The induction device described.

  11, 34 ... Reactor, 12, 12A, 12B, 12C, 12D, 12F, 12H, 12J, 12K, 12M, 12N, 12P, 12Q, 12S, 12T, 12Φ, 12V, 12X, 12Y, 12Z, 12Γ ... 1E type core, 13, 13A, 13B, 13C, 13D, 13F, 13H, 13J, 13K, 13M, 13N, 13P, 13Q, 13S, 13T, 13Φ, 13V, 13X, 13Y, 13Z, 13Γ ... 2nd E type core , 15, 20 ... central magnetic leg, 16, 21 ... first outer magnetic leg, 17, 22 ... second outer magnetic leg, 18, 18A, 18B, 18C, 18D, 18F1, 18F2, 18H1, 18H2, 18J1, 18J2 , 18K1, 18K2, 18M1, 18M2, 18N, 18P, 18Q, 18S, 18T, 18Φ, 18V, 18X1, 18 X2,18Y, 18Z, 18Γ, 23,23A, 23B, 23C, 23D, 23F1,23F2,23H1,23H2,23J1,23J2,23K1,23K2,23M1,23M2,23N, 23P, 23Q, 23S, 23T, 23Φ, 23V, 23X1, 23X2, 23Y, 23Z, 23Γ, 45, 45Λ, 46, 46Λ... Convex, 35, 35Δ, 35Λ... 1U core, 36, 36Δ, 36Λ. , 41Δ, first magnetic leg, 39, 39Δ, 42, 42Δ, second magnetic leg, G1 to G42, gap.

Claims (6)

In an induction device that combines a pair of cores having a plurality of magnetic legs facing each other,
An induction device in which a gap forming convex portion is provided at the tip of at least one of the plurality of magnetic legs, and the pair of cores have the same shape and the same size and are rotationally symmetrically combined.   The induction device according to claim 1, wherein the core has a pair of magnetic legs.   The core has a central magnetic leg and a pair of outer magnetic legs provided on both sides of the central magnetic leg, and a gap is formed at a tip of at least one of the central magnetic leg and the pair of outer magnetic legs. The induction device according to claim 1, wherein a convex portion is provided.   The induction device according to claim 3, wherein the gap forming convex portion is provided at a tip of the central magnetic leg.   The guidance device according to any one of claims 1 to 4, wherein the gap forming convex portion is single.   The induction device according to any one of claims 1 to 5, wherein the core is symmetrical.

Images