JP4802561B2 - Reactor and transformer - Google Patents

Description

  The present invention relates to a reactor and a transformer.

  As a conventional reactor, there is one in which a silicon steel plate is used as a core material and a plurality of ceramic gaps for permeability adjustment are inserted (for example, Patent Document 1). In such a reactor, in order to cope with the high output of a drive power supply system such as a hybrid vehicle, it is necessary to reduce the magnetic permeability of a core made of a silicon steel plate having a high magnetic permeability and make the core difficult to be magnetically saturated. The gaps (for example, 6 locations) are dispersed and inserted in the core.

JP 2004-95570 A

  However, in the configuration in which a large number of gaps are inserted in the core as described above, there is a problem that leakage magnetic flux due to the gaps increases. The leakage magnetic flux becomes a noise source for the peripheral circuit and induces an eddy current in the peripheral conductor and increases iron loss.

  Further, in the configuration in which a large number of gaps are provided, the core needs to be divided into a large number of parts, so that the assembly cost of the core increases, and the magnetic bodies on both sides are pulled at, for example, 10 Hz with the gaps sandwiched between the gap portions during driving. There is also a problem that vibration and noise are likely to occur by repeatedly attaching and releasing.

  Therefore, the problem to be solved by the present invention is to provide a reactor and a transformer that can eliminate or reduce problems caused by a gap.

  In order to solve the above-mentioned problems, in the invention of claim 1, a reactor used for a power supply system for driving a hybrid vehicle or an electric vehicle, which is formed of a dust magnetic material and has no gap inserted therein. And a coil provided on the outer periphery of the core, the core including two divided magnetic bodies having a form in which a ring-shaped annular body is divided at two locations in the circumferential direction, Two divided magnetic bodies are joined in an annular shape.

Moreover, the joint end portion of one of the divided magnetic material of the joint end portion of front SL two divided magnetic material is brought into contact with each other, flange portion projecting outward in a substantially flange-shaped is formed, the 2 An adhesive is applied to the outer periphery of the abutting portion where the joining end portions of the two divided magnetic bodies abut.

According to a second aspect of the present invention, in the reactor according to the first aspect of the present invention, the coil is configured by winding a wire rod having a substantially rectangular cross-section in an edgewise manner.

Further, in the invention of claim 3, in a reactor according to the invention of claim 1 or 2, wherein said split magnetic body have a substantially J-shaped planar shape, parallel to face each other of the two divided magnetic linear The coil is packaged on each part.

According to a fourth aspect of the present invention, in the reactor according to any one of the first to third aspects, a nanocrystalline material is used as the dust magnetic material.

The invention of claim 5 is a reactor used in a power supply system for driving a hybrid vehicle or an electric vehicle, comprising a ring-shaped core and a coil provided on the outer periphery of the core, When the two divided magnetic bodies having a form formed by a dust magnetic material and having a ring-shaped annular body divided at two locations in the circumferential direction and the two divided magnetic bodies are joined in an annular shape, 1 or 2 gaps inserted in the joint, the gap is substantially plate-shaped, and the cross-sectional size thereof is set larger than the size of the end surfaces of the divided magnetic bodies on both sides thereof, and the outer edge of the gap Are arranged so as to protrude outwardly from the outer periphery of the divided magnetic body on both sides thereof, and each surface on both sides of the protruding portion of the gap and the outer peripheral surface of the end portion of the divided magnetic body on both sides thereof At the intersection of right angles Wear agents have been granted.
According to a sixth aspect of the invention, in the reactor according to the fifth aspect of the invention, the gap is interposed in a portion of the core covered by the coil.
According to a seventh aspect of the present invention, in the reactor according to the fifth or sixth aspect, the divided magnetic body has a substantially J-shaped planar shape, and each of the linear portions of the two divided magnetic bodies facing each other in parallel with each other, The coil is packaged.
Moreover, in invention of Claim 8 , it is provided with the cyclic | annular core which is formed with the dust magnetic material, and the gap is not inserted, and the primary side and secondary side coils provided on the outer periphery of the core, The core includes two divided magnetic bodies having a form in which a ring-shaped annular body is divided at two locations in the circumferential direction, and the two divided magnetic bodies are joined in an annular shape. Further, a brim portion that protrudes outward in a substantially brim shape is formed at a joint end portion of one of the two split magnetic bodies that come into contact with each other. An adhesive is applied to the outer periphery of the abutting portion where the joining end portions of the two divided magnetic bodies abut.

According to a ninth aspect of the present invention, an annular core and primary and secondary coils provided on the outer periphery of the core are provided, and the core is formed of a dust magnetic material and connected in an annular shape. When the two divided magnetic bodies are joined in a ring shape, one or two pieces inserted between the two divided magnetic bodies having a form obtained by dividing the annular body at two locations in the circumferential direction With a gap. Further, the gap is substantially plate-shaped, and its cross-sectional size is set larger than the size of the end face of the divided magnetic body on both sides thereof, and the outer edge of the gap is outward from the outer periphery of the divided magnetic body on both sides thereof. It is arranged so as to project in a brim shape, and an adhesive is applied to a portion where each surface on both sides of the projecting portion of the gap and an outer peripheral surface of the end portion of the divided magnetic body on both sides intersect at a right angle.

  According to the first aspect of the present invention, since the core is formed by using the dust magnetic material whose permeability is relatively easy to adjust by selecting the material, the gap-free core is formed. Various problems (leakage magnetic flux, high cost, noise, etc.) caused by the problem can be solved.

  In addition, since it is composed of two divided magnetic bodies that are obtained by dividing an annular body in which the cores are annularly formed at two locations in the circumferential direction, the number of core components can be reduced, and the assembly of the core is also simple It can be carried out.

Moreover, since it is the structure which adhere | attaches division | segmentation magnetic bodies by providing an adhesive agent on the outer periphery of the contact part of two division | segmentation magnetic bodies, the thickness of the adhesive agent by which an adhesive agent is inserted in a contact part Variations in inductance due to the influence of errors can be suppressed.

  In addition, since the brim portion is formed at one of the joining end portions of the divided magnetic bodies that are in contact with each other, the bonding area of the adhesive in the vicinity of the contacting portion between the joining end portions is increased. As a result, adhesion is facilitated and adhesion strength is increased.

According to the second aspect of the present invention, since the coil is configured by winding a wire rod having a substantially rectangular cross section around the edgewise, the space factor of the coil can be improved.

  Further, since the coil wire is wound without gaps by edgewise winding, the leakage flux from the gap insertion portion to the periphery can be reduced by providing the coil on the outer periphery of the gap insertion portion.

According to the third aspect of the invention, since the divided magnetic body has a substantially J-shaped planar shape that can be easily formed, the divided magnetic body can be easily press-molded.

According to the invention described in claim 4 , since the nanocrystalline material is used as the dust magnetic material, a core having a low magnetic permeability and a low coercive force can be easily formed.

According to the invention described in claim 5, by forming the magnetic part of the core using a dust magnetic material whose permeability can be adjusted relatively easily by selecting the material, one or two gap insertion points are provided. Therefore, various problems caused by the gap (leakage magnetic flux, cost increase, noise, etc.) can be reduced.
In addition, since the magnetic body portion of the core is formed by two divided magnetic bodies obtained by dividing the annular body in a circumferential direction at two locations in the circumferential direction, it is possible to reduce the number of core components and assemble the core. Etc. can also be easily performed.
Further, the permeability of the core can be easily adjusted by adjusting the thickness of the gap.
Also, since the adhesive is applied to the outer periphery of the contact portion between the divided magnetic body and the gap, the magnetic body and the gap are bonded, so that the adhesive is formed by inserting the adhesive into the contact portion. The gap length error due to the influence of the thickness error can be removed, and as a result, the variation in the core inductance can be suppressed.
In addition, since the cross-sectional size of the gap is set to be larger than the size of the end face of the divided magnetic body on both sides, the outer edge of the gap at the contact portion between the divided magnetic body and the cap is outside the divided magnetic body on both sides. Thus, the adhesive area in the vicinity of the contact portion between the gap and the divided magnetic body can be increased. As a result, the adhesion is facilitated and the adhesive strength is increased.
According to invention of Claim 6, since the gap is inserted in the part covered with the coil of a core, the leakage magnetic flux in a gap insertion part can be suppressed effectively.
According to the seventh aspect of the invention, since the divided magnetic body has a substantially J-shaped planar shape that is easy to mold, the divided magnetic body can be easily press-molded.
According to the eighth aspect of the present invention, since the core is formed by using the dust magnetic material whose permeability can be adjusted relatively easily by selecting the material, the core without the gap is formed. Various problems (leakage magnetic flux, high cost, noise, etc.) caused by the problem can be solved.

  In addition, since it is composed of two divided magnetic bodies that are obtained by dividing an annular body in which the cores are annularly formed at two locations in the circumferential direction, the number of core components can be reduced, and the assembly of the core is also simple It can be carried out.

According to the invention described in claim 9 , by forming the magnetic body portion of the core using a dust magnetic material whose permeability can be adjusted relatively easily by selecting the material, one or two gap insertion portions are formed. Therefore, various problems caused by the gap (leakage magnetic flux, cost increase, noise, etc.) can be reduced.

  In addition, since the magnetic body portion of the core is formed by two divided magnetic bodies obtained by dividing the annular body in a circumferential direction at two locations in the circumferential direction, it is possible to reduce the number of core components and assemble the core. Etc. can also be easily performed.

  Further, the permeability of the core can be easily adjusted by adjusting the thickness of the gap.

<First Embodiment>
FIG. 1 is a plan view of a reactor according to the first embodiment of the present invention, and FIG. 2 is a diagram of the reactor in an exploded state. As shown in FIGS. 1 and 2, the reactor 1 includes a core 3 having a substantially toroidal shape (for example, a substantially rectangular toroidal shape) and coils 5 and 7 provided on the outer periphery of the core 3. And used for a power supply system for driving a hybrid vehicle or an electric vehicle (including a hybrid vehicle).

  The core 3 includes two divided magnetic bodies 11 and 13 having a form in which a ring-shaped annular body is divided at two locations in the circumferential direction, and the two divided magnetic bodies 11 and 13 are annularly bonded with an adhesive. It is configured to be joined and does not include a gap. In the present embodiment, the divided magnetic bodies 11 and 13 have substantially the same J-shaped planar shape. The adhesive is applied to, for example, end surfaces of the divided magnetic bodies 11 and 13 that are in contact with each other.

As the material of the divided magnetic bodies 11 and 13, a dust magnetic material is used in order to realize a low magnetic permeability and a low coercive force, and from the viewpoint of ease of forming. Here, the low magnetic permeability is a characteristic necessary for preventing the core 3 from being magnetically saturated due to a high output of a drive power supply system such as a hybrid vehicle. Further, the low coercive force is a characteristic necessary for suppressing the core loss (hysteresis loss) of the core 3. For example, the material and the number of inserted gaps (in this embodiment, no gap is inserted) are determined so that the relative permeability μ _r satisfies the following relational expression (1) from the viewpoint of permeability. that (for example, a value of mu _r is set to about 30). In Equation (1), l is the magnetic path length of the core 3, L is the inductance of the reactor 1, μ ₀ is the vacuum permeability, N is the number of turns of the coils 5 and 7, and S Is the cross-sectional area of the core 3.

  The dust magnetic material is a metal magnetic powder or a metal magnetic powder covered with a predetermined insulating coating, which is bonded with a resin, filled with a powder magnetic material in a predetermined mold, and pressed and compressed. Then, the shape is formed by heat treatment. For this reason, the dust magnetic body has the advantage that it is easy to mold and the advantage that the magnetic properties (such as permeability and coercive force) can be easily controlled by the degree of freedom of material selection.

  In addition, specific examples of the dust magnetic material that realizes low magnetic permeability and low coercive force include a metal magnetic powder using a nanocrystalline material (especially an anisotropic nanocrystalline material), a metal in a dust magnetic body. The film thickness of the insulating film (or insulating layer) between the particles is a very thin film (for example, the film thickness is 10 nm to 1 μm) that maintains the distance at which the interaction between the magnetic moments in adjacent particles does not work. And what increased the ratio of the resin material for coupling | bonding etc. can be considered. Insulating materials include non-crystalline materials (glass, phosphate, borate, silicate, etc.) that exhibit high electrical resistance and good deformation followability.

  A nanocrystalline material is a metal magnetic powder whose crystal size is nanosized, and compositionally, ferromagnetic elements (Fe, Co, Ni, etc.) and amorphization promoting elements (O, N, B, Nb) Etc.) and an element (Si, Al, rare earth, etc.) that can be easily combined with an amorphization-promoting element. In order to increase the anisotropy and lower the magnetic permeability, it is possible to increase the ratio of Co to Fe in the combination of (Fe—Co) — (Si, B). In general, the nanocrystalline material is produced by adjusting the crystal size to be nano-size when heat-treating an amorphous powder or a ribbon produced by a rapid cooling method (atomization, melt span). As a specific material example, for example, Hitachi Metals' fine met (Fe-Si-B-Nb-Cu) (trade name) can be cited.

  About the point (principle etc.) which can form the low magnetic permeability divided magnetic bodies 11 and 13 by using an anisotropic nanocrystalline material for the dust magnetic material, the magnetic anisotropy is increased similarly to the normal magnetic material. By doing so, a low magnetic permeability is realized. However, the coercive force increases as the magnetic anisotropy increases in the normal magnetic material, but the nanocrystalline material can realize a high anisotropy and a low coercive force due to the special crystal grain size. It has become. More specifically, since a nanocrystal has a crystal structure different from an amorphous material, it exhibits magnetic anisotropy, and a low magnetic permeability can be realized by increasing the magnetic anisotropy. In addition, the coercive force usually increases as the crystal grain size becomes smaller. However, when the crystal grain size becomes smaller than 100 nanometers, the smaller the grain size, the smaller the coercive force tends to become smaller. Low coercivity is achieved by setting the crystal grain size in the region.

  In addition, regarding the point (principle etc.) that can achieve low magnetic permeability and low coercive force by making the film thickness of the insulating film (or insulating layer) between the metal particles in the dust magnetic material extremely thin, Reduced film thickness by reducing the contact point between metal particles while suppressing the contact point (insulation breakdown point) between metal particles (thinning is made thin enough to ignore the effect of demagnetizing field), and reducing the contact point between metal particles. The magnetic susceptibility is realized, and a low coercive force can be realized by suppressing the influence of the demagnetizing field.

  As shown in FIG. 3, the coils 5 and 7 are formed by winding a wire 15 having a substantially rectangular cross section around the edgewise, and is formed by a series of wires 15 as shown in FIG. 2. In addition, the coils 5 and 7 are packaged on the straight portions 3 a and 3 b of the core 3 facing each other in parallel so as to surround the joint portion of the divided magnetic bodies 11 and 13.

  The assembly of such a reactor 1 is performed as follows. That is, as shown in FIG. 4, the divided magnetic bodies 11 and 13 are bonded to each other with an adhesive in a state where the coils 4 and 7 are packaged on one divided magnetic body 13.

  As described above, according to the present embodiment, there is no gap by forming the divided magnetic bodies 11 and 13 of the core 3 using the dust magnetic material whose permeability can be adjusted relatively easily by selecting the material. Since the core 3 is formed, various problems caused by the gap (leakage magnetic flux, cost increase, noise, etc.) can be solved.

  Further, since the core 3 is constituted by the two divided magnetic bodies 11 and 13 obtained by dividing the annular body in a ring shape at two locations in the circumferential direction, the number of components of the core 3 can be reduced. Can be easily assembled.

  Further, since the divided magnetic bodies 11 and 13 have a substantially J-shaped planar shape that can be easily formed, the divided magnetic bodies 11 and 13 can be easily press-formed.

  Further, since the coils 5 and 7 are formed by winding the wire 15 having a substantially rectangular cross-sectional shape edgewise, the space factor of the coils 5 and 7 can be improved.

  Moreover, by using an anisotropic nanocrystalline material or the like as the dust magnetic material of the divided magnetic bodies 11 and 13 of the core 3, the core 3 having a low magnetic permeability and a low coercive force can be easily formed.

Second Embodiment
FIG. 5 is an exploded view of the reactor core according to the second embodiment of the present invention. The reactor 1 according to the present embodiment is substantially different from the reactor 1 according to the first embodiment described above only in the form of the joint portions of the divided magnetic bodies 11 and 13. The same reference numerals are attached.

  In the present embodiment, as shown in FIG. 5, the joint end 13 a of one split magnetic body 13 among the joint ends 11 a, 11 b, 13 a, and 13 b with which the two split magnetic bodies 11 and 13 are brought into contact with each other. , 13b are integrally formed with flange portions 21, 23 that project outward in a substantially flange shape. In addition, in this embodiment, although both the collar parts 21 and 23 were provided in the joining edge part 13a, 13b side, you may provide any one or both in the joining edge part 11a, 11b side.

  As shown in FIG. 6, the split magnetic bodies 11 and 13 are joined to the outer periphery of the abutting portion with the end surfaces of the joining end portions 11a and 11b and the end surfaces of the joining end portions 13a and 13b in contact with each other. This is done by applying an adhesive 25. At this time, the adhesive 25 is bonded to the portion where the joint end portions 11a and 11b side surfaces of the flange portions 21 and 23 and the outer peripheral surfaces of the joint end portions 11a and 11b intersect at a right angle. The area can be effectively expanded.

  As described above, according to the present embodiment, substantially the same effect as that of the first embodiment described above can be obtained, and by applying the adhesive 25 to the outer periphery of the contact portion of the divided magnetic bodies 11 and 13, Since it is the structure which adhere | attaches the division | segmentation magnetic bodies 11 and 13, the dispersion | variation in the inductance by the influence of the thickness error of the adhesive agent 25 by the adhesive agent 25 being inserted by the contact part can be suppressed.

  Further, an adhesive 25 is applied to a portion where the joint end portions 11a and 11b side surfaces of the flange portions 21 and 23 and the outer peripheral surfaces of the joint end portions 11a and 11b intersect at right angles in the joint portions of the divided magnetic bodies 11 and 13. By doing so, the adhesive area of the adhesive 25 in the vicinity of the outer periphery of the contact portion can be effectively expanded, and as a result, the adhesion becomes easy and the adhesive strength is increased.

<Third Embodiment>
FIG. 7 is an exploded view of the reactor core according to the third embodiment of the present invention. The reactor 1 according to the present embodiment is substantially different from the reactor 1 according to the first embodiment described above only in that gaps 31 and 33 are inserted in the joint portions of the divided magnetic bodies 11 and 13. Corresponding parts are given the same reference numerals. In addition, in this embodiment, although it is the structure which inserts the two gaps 31 and 33, it is good also as a structure which inserts the one gap 31 or 33 (according to this, either one division | segmentation magnetic body 11, 13 is required to correspond to the length dimension of any one of the straight portions).

  In the present embodiment, as shown in FIG. 7, substantially plate-like gaps 31 and 33 are respectively inserted in the joint portions of the divided magnetic bodies 11 and 13 constituting the core 3. As the material of the gaps 31 and 33, a nonmagnetic material such as alumina is used.

  As described above, according to the present embodiment, by forming the magnetic body portion of the core 3 using the dust magnetic material whose permeability can be adjusted relatively easily by selecting the material, two gap insertion locations are provided. Therefore, various problems (leakage magnetic flux, cost increase, noise, etc.) caused by the gaps 31 and 33 can be reduced.

  Further, by adjusting the thickness of the gaps 31 and 33, the magnetic permeability of the core 3 can be easily adjusted.

  Moreover, since the annular body in which the magnetic body portions of the core 3 are connected in an annular shape is composed of two divided magnetic bodies 11 and 13 that are divided at two locations in the circumferential direction, the number of components of the core 3 can be reduced. The core 3 can be easily assembled.

  Further, since the divided magnetic bodies 11 and 13 have a substantially J-shaped planar shape that can be easily formed, the divided magnetic bodies 11 and 13 can be easily press-formed.

  Moreover, since the gaps 31 and 33 are inserted in the portions covered by the coils 5 and 7 of the core 3, the leakage magnetic flux at the gap insertion part can be effectively suppressed.

  Further, since the coils 5 and 7 are formed by winding the wire 15 having a substantially rectangular cross-sectional shape edgewise, the space factor of the coils 5 and 7 can be improved.

  In addition, since the coils 4 and 7 are tightly wound without a gap, it is possible to enhance the shielding effect against the leakage magnetic flux at the gap insertion portion by the coils 5 and 7.

  Moreover, by using an anisotropic nanocrystalline material or the like as the dust magnetic material of the divided magnetic bodies 11 and 13 of the core 3, the core 3 having a low magnetic permeability and a low coercive force can be easily formed.

<Fourth embodiment>
FIG. 8 is an enlarged cross-sectional view showing the main part of the core of the reactor according to the fourth embodiment of the present invention. The reactor 1 according to the present embodiment is substantially different from the reactor 1 according to the third embodiment described above only in the form of the gap insertion part of the core 3, and the parts corresponding to each other are the same. A reference sign is attached.

  In the present embodiment, as shown in FIG. 8, the cross-sectional size of the gaps 31 and 33 is set larger than the size of the end faces of the divided magnetic bodies 11 and 13 on both sides thereof. And in each gap insertion part, it arrange | positions so that the outer edge part of the gaps 31 and 33 may protrude outwardly from the outer periphery of the division | segmentation magnetic bodies 11 and 13 of both sides, and the overhang | projection part of the gaps 31 and 33 An adhesive 25 is applied to a portion where the surfaces on both sides of the two sides and the outer peripheral surfaces of the end portions of the divided magnetic bodies 11 and 13 on both sides intersect at right angles, and the gaps 31 and 33 and the divided magnetic bodies 11 and 13 on both sides thereof Is glued. For this reason, the adhesion area of the adhesive 25 in the vicinity of the contact portion between the gaps 31 and 33 and the divided magnetic bodies 11 and 13 is enlarged.

  As described above, according to the present embodiment, substantially the same effect as that of the third embodiment described above can be obtained, and the adhesive 25 is provided on the outer periphery of the contact portion between the divided magnetic bodies 11 and 13 and the gaps 31 and 33. Since the divided magnetic bodies 11 and 13 and the gaps 31 and 33 are bonded to each other, the inductance due to the influence of the thickness error of the adhesive 25 caused by the adhesive 25 being inserted into the contact portion is provided. Variations can be suppressed.

  In addition, since the adhesive 25 is applied to the portions where the respective surfaces on both sides of the protruding portions of the gaps 31 and 33 and the end outer peripheral surfaces of the divided magnetic bodies 11 and 13 on both sides intersect at right angles, The bonding area of the adhesive 25 in the vicinity of the contact portion between the gaps 31 and 33 and the divided magnetic bodies 11 and 13 can be effectively expanded. As a result, the bonding is facilitated and the bonding strength is increased.

<Fifth Embodiment>
FIG. 9 is a plan view of a transformer according to the fifth embodiment of the present invention. As shown in FIG. 9, the transformer 41 includes a core 3 and a primary side coil 45 and a secondary side coil 47 provided on the outer periphery of the core 43. The core 43 has a configuration substantially similar to that of any of the cores 3 in the first to fourth embodiments described above. The coils 45 and 47 are formed by winding a rectangular wire edgewise in substantially the same manner as in the above-described embodiments.

  For this reason, also in the transformer 3 of the present embodiment, substantially the same effect as the above-described embodiments can be obtained.

It is a top view of the reactor which concerns on 1st Embodiment of this invention. It is a figure of the state which decomposed | disassembled the reactor of FIG. It is a perspective view of a coil. It is a figure which shows the assembly process of the reactor of FIG. It is a figure of the state which decomposed | disassembled the core of the reactor which concerns on 2nd Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the core of FIG. It is a figure of the state which decomposed | disassembled the core of the reactor which concerns on 3rd Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the core of the reactor which concerns on 4th Embodiment of this invention. It is a top view of the transformer concerning a 5th embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reactor 3 Core 5,7 Coil 11,13 Division | segmentation magnetic body 21,23 Head part 25 Adhesive 31,33 Gap 41 Transformer 43 Core 45 Primary side coil 47 Secondary side coil

Claims (9)

A reactor used in a power supply system for driving a hybrid vehicle or an electric vehicle,
An annular core that is formed of a dust magnetic material and has no gap interposed therebetween;
A coil provided on the outer periphery of the core;
With
The core includes two divided magnetic bodies having a form in which a ring-shaped annular body is divided at two locations in the circumferential direction, and is configured by joining the two divided magnetic bodies in an annular shape .
A brim portion that protrudes outward in a substantially brim shape is formed on the joint end portion of one of the split end portions of the two split magnetic bodies that contact each other.
A reactor , wherein an adhesive is applied to an outer periphery of an abutting portion where the joint end portions of the two divided magnetic bodies abut .   The reactor according to claim 1,
  The reactor is characterized in that the coil is configured by winding an edgewise wire rod having a substantially flat rectangular cross section.   In the reactor according to claim 1 or 2,
  2. The reactor according to claim 1, wherein the divided magnetic body has a substantially J-shaped planar shape, and the coils are sheathed on each of the linear portions of the two divided magnetic bodies facing each other in parallel.   In the reactor according to any one of claims 1 to 3,
  A reactor in which a nanocrystalline material is used as the dust magnetic material. A reactor used in a power supply system for driving a hybrid vehicle or an electric vehicle,
An annular core,
A coil provided on the outer periphery of the core;
With
The core is
Two divided magnetic bodies that are formed of a dust magnetic material and have a form that is formed by dividing a ring-shaped annular body at two locations in the circumferential direction;
When the two divided magnetic bodies are joined in an annular shape, one or two gaps inserted in the joined portion;
With
Cross-sectional size of its said gap is substantially plate shaped, flange is set larger than the size of the end face of the divided magnetic material on both sides, the outer edge of the gap from the outer periphery of the divided magnetic body on both sides thereof outwardly Arranged so as to overhang,
The reactor is characterized in that an adhesive is applied to portions where the surfaces on both sides of the protruding portion of the gap and the outer peripheral surfaces of the end portions of the divided magnetic bodies on both sides intersect at right angles .   The reactor according to claim 5,
  The reactor, wherein the gap is inserted in a portion of the core covered by the coil. In the reactor according to claim 5 or 6,
The divided magnetic material have a substantially J-shaped planar shape, each straight portion parallel to face each other of the two divided magnetic material, characterized in that said coil is exterior reactor.   An annular core that is formed of a dust magnetic material and has no gap interposed therebetween;
  Primary and secondary coils provided on the outer periphery of the core;
With
  The core includes two divided magnetic bodies having a form in which a ring-shaped annular body is divided at two locations in the circumferential direction, and is configured by joining the two divided magnetic bodies in an annular shape.
  A brim portion that protrudes outward in a substantially brim shape is formed on the joint end portion of one of the split end portions of the two split magnetic bodies that contact each other.
  A transformer, wherein an adhesive is applied to an outer periphery of an abutting portion where the joining end portions of the two divided magnetic bodies abut.   An annular core,
  Primary and secondary coils provided on the outer periphery of the core;
With
  The core is
  Two divided magnetic bodies that are formed of a dust magnetic material and have a form that is formed by dividing a ring-shaped annular body at two locations in the circumferential direction;
  When the two divided magnetic bodies are joined in an annular shape, one or two gaps inserted in the joined portion;
With
  The gap is substantially plate-shaped, and its cross-sectional size is set larger than the size of the end face of the divided magnetic body on both sides thereof, and the outer edge of the gap is a flange shape outward from the outer periphery of the divided magnetic body on both sides thereof. Arranged to overhang,
  The transformer is characterized in that an adhesive is applied to a portion where each surface on both sides of the protruding portion of the gap and an outer peripheral surface of the end portion of the divided magnetic body on both sides intersect at a right angle.

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