JP7255153B2 - Reactor and manufacturing method thereof - Google Patents

Description

The present invention relates to reactors used in converter circuits, smoothing circuits, and active circuits of hybrid vehicles, fuel cell vehicles, electric vehicles, etc., and methods of manufacturing the same.

2. Description of the Related Art Hybrid vehicles and electric vehicles, which are rapidly becoming popular in recent years, are equipped with high-output electric motors, and reactors are used in power converters used for driving these motors. A reactor, as a general configuration form, includes a toroidal magnetic core and a coil wound around it. In some cases, a longitudinally wound flat wire coil (also called an edgewise coil) is used.

In order to wind the rectangular conductor, it is necessary to apply a large deformation force, and it is difficult to wind the conductor directly around the annular magnetic core. Therefore, as described in Patent Literatures 1 to 3, the rectangular conducting wire is formed into a tubular rectangular conducting wire longitudinally wound coil extending linearly, the annular magnetic core is composed of split cores, and the split cores are formed from both ends of the longitudinally wound rectangular conducting wire coil. Combining and combining is done through For example, in Patent Literature 1, a split core is inserted into a longitudinally wound flat conductor wire coil, and the split cores are tightened together to be assembled in an annular shape to widen the winding interval of the longitudinally wound flat conductor wire coil. As a result, a reactor in which a longitudinally wound flat wire coil is arranged over substantially the entire circumference of the annular magnetic core is formed.

JP 2018-56511 A Chinese Patent Application Publication No. 105825998 Chinese Patent Application Publication No. 104269242

An annular magnetic core configured by combining split cores has a combined portion in the circumferential direction. The combined portion is a joint of the magnetic path, and is also a portion through which the magnetic flux generated by the longitudinally wound coil of the rectangular conductor is difficult to pass. Therefore, leakage of magnetic flux is likely to occur around it. In general, coils generate heat due to resistance loss, and leakage magnetic flux is also a factor that increases coil heat generation. When leakage magnetic flux enters the rectangular conductor around the combined part, eddy current loss occurs and the coil heats up. Since significant heat generation leads to functional deterioration and thermal damage of the reactor, it is necessary to take heat countermeasures such as providing a separate cooling means to enhance the cooling effect, which leads to an increase in size and cost of the reactor. There is also a method of reducing the eddy current loss by increasing the distance between the annular magnetic core and the coil so as to reduce the influence of the leakage magnetic flux. Since the area of is limited, it was difficult to provide an interval that would not be affected by the leakage magnetic flux.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a reactor in which the influence of leakage flux at a combined portion of annular magnetic cores composed of split cores is reduced, and a manufacturing method thereof.

A first invention is a reactor comprising an annular magnetic core in which split cores are combined, a core case in which each of the split cores is enclosed and combined in an annular shape, and a rectangular conducting wire longitudinally wound coil wound around the core case. The longitudinally-wound rectangular conductor wire coil includes a narrow portion with a narrow interval between adjacent rectangular conductors and a wide portion between one end and the other end of the coil, and the wide portion is a combination of the split cores. In the wide portion, a rectangular conducting wire straddles the combination portion only on the inner peripheral surface side of the annular magnetic core.

In the present invention, it is preferable that each of the split cores has a chamfered portion on the end face that becomes the combined portion, and the chamfered portion is located at least on the inner peripheral surface side of the annular magnetic core.

In the present invention, it is preferable that the number of times the rectangular conducting wire straddles the combined portion on the inner peripheral surface side of the annular magnetic core is one.

In the present invention, it is preferable that the rectangular conductive wire does not straddle any combined portion on both end sides of the longitudinally wound coil of the rectangular conductive wire.

In the present invention, it is preferable that the combined portion be positioned in rotational symmetry of approximately 180 degrees with respect to the center of the annular magnetic core.

In the present invention, it is preferable that the interval between the adjacent flat conductor wires in the longitudinally wound flat conductor wire coil is the widest at the middle portion of the coil.

In the present invention, each of the split cores is preferably a powder magnetic core using flat powder of an Fe-based amorphous soft magnetic alloy, and is easily magnetized in the circumferential direction of the annular magnetic core.

A second invention comprises a step of preparing a longitudinally wound flat conductor wire coil in which a flat conductor wire is longitudinally wound, inserting a core case holding a split core from both ends of the longitudinally wound flat conductor wire coil, and combining the split core with the split core. a step of forming a magnetic core and mounting the longitudinal coil of flat conductor wire in the core case; At a position corresponding to the combined portion of the flat conducting wire longitudinally wound coil, a step of expanding the interval between adjacent flat conducting wires of the flat conducting wire vertical winding coil in the circumferential direction of the annular magnetic core and deforming it to form a wide portion, or in advance of the flat conducting wire vertical winding coil and locating a deformed wide portion formed by widening an interval between adjacent rectangular conductors at a combined portion of the split cores.

In the present invention, the method for manufacturing a reactor includes the step of attaching a coil movement restricting member for restricting the movement of the longitudinally wound flat conducting wire to the core case appearing in the wide portion of the longitudinally wound flat conducting wire.

In the present invention, the reactor manufacturing method also includes a step of adhering the flat conducting wire and the core case at the wide portion of the longitudinally wound flat conducting wire coil.

ADVANTAGE OF THE INVENTION According to this invention, the reactor which reduced the influence of the leakage magnetic flux in the combination part of the split core which comprises an annular magnetic core, and its manufacturing method can be provided.

1 is a front view of a reactor according to one embodiment of the present invention; FIG. 1 is a perspective view of a reactor according to an embodiment of the invention; FIG. 1 is an exploded perspective view of a reactor excluding a terminal block for explaining a method of manufacturing a reactor according to an embodiment of the present invention; FIG. FIG. 4 is a front view of the reactor before forming the wide portion of the longitudinally wound coil of flat conducting wire; FIG. 10 is a front view of the reactor after the formation of the wide portion of the longitudinally-wound coil of flat conducting wire; FIG. 10 is a diagram for explaining the relationship between the combined portion of the split core and the flat conductor wire; 1 is a plan view of an annular magnetic core used in a reactor according to one embodiment of the present invention; FIG. 1 is a perspective view of a split core used in a reactor according to one embodiment of the present invention; FIG. 1 is an exploded perspective view of a core case used in a reactor according to one embodiment of the present invention; FIG. FIG. 4 is a plan view of a core case that internally holds split cores in a reactor according to an embodiment of the present invention;

Hereinafter, reactors according to embodiments of the present invention will be specifically described. In some or all of the drawings, parts that are not necessary for explanation are omitted, and some parts are enlarged or reduced in order to facilitate explanation. Also, the dimensions and shapes shown in the description, the relative positional relationships of the constituent members described with reference to the drawings, etc. are not limited to those descriptions, the drawings, etc., unless otherwise specified. Furthermore, in the description, the same names and symbols indicate the same or homogeneous members, and detailed description may be omitted even if they are illustrated.

FIG. 1 is a front view of a reactor according to one embodiment of the present invention, and FIG. 2 is its perspective view. 3 to 5 are diagrams for explaining a method of manufacturing a reactor according to an embodiment of the present invention, and FIG. 3 shows a process of inserting a core case containing split cores into a longitudinally wound flat conductor wire coil. It is a figure for explaining. FIG. 4 is a front view showing a state in which a core case, in which a longitudinally wound flat conductor wire is passed, is combined in an annular shape, and the longitudinally wound flat conductor wire coil is deployed over substantially the entire circumference. FIG. 5 is a plan view showing a state in which the intervals between the flat conductor wires are widened in the coil intermediate portion of the vertical winding coil of the flat conductor wire.

As shown, the reactor 1 of the present embodiment includes split cores (not shown) forming an annular magnetic core, core cases 20 that enclose the respective split cores and can be combined in an annular manner, and core cases that are annularly combined. It has 20 outwardly wound longitudinal coils 30 of flat conductor wire. In the illustrated example, the reactor 1 is erected and adhesively fixed to a terminal block 50 on which metal pins 52 for mounting the reactor 1 are erected so as to facilitate mounting on a circuit board. The end portion 32 side of the longitudinally wound flat wire coil 30 passes through the through hole of the terminal block 50 and is pulled out to the lower side of the terminal block (toward the metal pin 52 side). Including such a mode, the reactor of the present invention includes a case where other functional members are added in addition to the basic configuration of the split core 5, the core case 20, and the longitudinally wound flat wire coil 30.

In the reactor 1 shown in the figure, a wide portion 33 is provided on the upper side in the z-direction, in which the space between the rectangular conductors is widened at the intermediate portion of the longitudinally wound rectangular conductor coil 30 (the intermediate portion between one end and the other end of the coil). In addition, the end portion of the longitudinally-wound flat wire coil 30 is pulled out to the lower side of the reactor 1 . Between one end of the coil and the wide portion and between the wide portion and the other end of the coil are narrow portions in which the distance between the flat conductor wires is narrow. The annular magnetic core in the core case 20 has a shape that follows the shape of the core case, and is constructed by combining the circumferential ends of a pair of arc-shaped split cores. For example, an annular magnetic core in which arc-shaped split cores having a center angle of approximately 180 degrees are combined has two joint portions of the split cores that are 180 degrees rotationally symmetrical with respect to the center of the annular magnetic core. If the annular magnetic core is confirmed alone, the combined portion of the split cores (hereinafter also simply referred to as "combined portion") can be confirmed linearly on the surface. Although the details will be described later, the annular magnetic core used in the illustrated reactor 1 also has a combination portion at two locations with 180° rotational symmetry, and a longitudinally wound flat wire coil 30 is attached to a portion corresponding to one of the combination portions. A wide portion 33 is provided, and the interval between the flat conductor wires in the intermediate portion of the coil is the widest. Note that the intermediate portion of the coil is not limited to a mathematical intermediate portion, and refers to a portion including areas before and after the intermediate portion.

Also, the combined portion of the other split core is on the terminal 52 side in FIG. 1 and is between one end and the other end of the coil. There is also a space between one end and the other end of this coil. Therefore, there is no rectangular conducting wire that straddles the combined portion of the other split core.

The joint of the split core is inside the core case, so it is not possible to directly check it. By doing so, it is possible to confirm the combined portion of the divided cores. Alternatively, an opening may be provided in a part of the core case so that the combined portion of the split cores can be directly checked through the opening. In that case, after confirmation, it is desirable to close the opening with an insulating resin or the like to ensure insulation between the annular magnetic core and the longitudinally wound flat wire coil.

The longitudinally-wound flat conductor wire coil 30 has a predetermined thickness and width, and is formed by winding a single continuous flat conductor wire, which is insulated with enamel, with the same winding diameter and a predetermined number of turns. The cross-sectional dimensions and the number of turns of the rectangular conducting wire are not limited, and can be appropriately selected according to the application. The air core portion of the longitudinally wound flat wire coil 30 has a dimension and shape that allows insertion of the core case 20, and in the illustrated example, it is a rectangular space. When the intervals between the flat conductor wires of the longitudinally wound flat conductor wire coil 30 are widened while being wound around the core case 20, the longitudinally wound flat conductor wire coil 30 can be deformed due to the restrictions imposed by the arc-shaped outer shape and the radial thickness of the core case 20. direction is substantially limited to the circumferential direction. Also, when forming a wide portion by increasing the distance between rectangular conductors in advance, it is necessary to deform the longitudinally wound rectangular conductor coil 30 in consideration of the insertion of the core case 20 . In either case, the area defined by the flat conductor wire that appears when looking at the core case 20 in the y direction in the wide portion forms a fan shape that shrinks from the outer peripheral surface side to the inner peripheral surface side of the core case 20 .

In the illustrated reactor 1 , the rectangular conductor diagonally straddles the combined portion 8 on the inner peripheral surface side of the annular magnetic core 10 . Here, the rectangular conductive wire straddles the combined portion, as shown in FIG. It refers to the state of crossing the combined portion 8 linearly confirmed on the surface of the annular magnetic core. According to the present invention, the rectangular conducting wire 31 can be configured to straddle the combined portion 8 only on the inner peripheral surface side of the annular magnetic core. By reducing the number of rectangular conductors crossing over the combined portion, it is possible to reduce the influence of leakage magnetic flux at the combined portion. Preferably, the number of times the rectangular conducting wire straddles the combined portion 8 on the inner peripheral surface side of the annular magnetic core 10 is one.

The end portion side of the longitudinally wound flat wire coil 30 is positioned in the vicinity of the lower combined portion. As shown in FIG. 1, it is preferable to pull out the flat conductor wire on the end side of the vertically wound flat conductor wire coil 30 at a position away from the lower combination portion so that it does not straddle the combination portion.

FIG. 7 shows a plan view of an annular magnetic core configured by combining split cores, and FIG. 8 shows a perspective view of a split core used for the annular magnetic core of FIG. The end faces 6 of the split cores 5 in the circumferential direction face each other and are combined to form an annular magnetic core 10 having an annular shape. The illustrated split core 5 has an arcuate shape with a central angle of approximately 180 degrees, but is not limited to this, and may differ within a range that does not interfere with the winding of the rectangular conducting wire longitudinally wound coil 30 and the formation of the wide portion 33 . I don't mind. A U-shaped alphabet with a part of the linear shape may be used, and the annular magnetic core 10 combining them has a flattened elliptical shape. Combining the split cores 5 of the same shape forms a combined portion 8 rotationally symmetrical with respect to the center of the annular magnetic core 10 . Although the number of split cores 5 constituting the toroidal magnetic core 10 may be three or more, when the number of combination portions 8 increases according to the number of combinations and the winding intervals of the longitudinally wound rectangular conducting wire coil 30 are dense. , it is difficult to provide the wide portion 33 corresponding to the combined portion 8, so it is preferable to set the number of combinations to two. Alternatively, the annular magnetic core 10 may be configured by combining split cores 5 having different central angles.

The end face 6 of the split core 5 shown in the figure is chamfered (R-chamfered) in a curved shape on the inner peripheral surface 11 and the outer peripheral surface 12 of the annular magnetic core 10 . By chamfering the end faces 6 of the split cores 5, the distance over which leakage magnetic flux leaks from the chamfered portion can be suppressed. On the inner peripheral surface side of the annular magnetic core 10, the leakage magnetic flux entering the rectangular conductor is reduced, the occurrence of eddy current loss is suppressed, and heat generation of the coil can be prevented more effectively. In particular, it is preferable to chamfer when providing a gap in the combined portion 8 of the annular magnetic core 10 . The chamfering may be, for example, C-chamfering in which the corner edges of the end face 6 are dropped to form a slope.

The split core 5 includes a ferrite magnetic core made of Mn-based or Ni-based soft ferrite, pure iron, Fe—Si alloy, Fe—Cr alloy, Fe—Cr—Si alloy, Fe—Al alloy, Fe—Al - Si alloy, Fe-Al-Cr alloy, Fe-Al-Cr-Si alloy, Fe-Ni alloy, Fe-MB alloy, etc., crystalline or amorphous soft magnetic alloy powder It is preferred to use a dust core. Soft magnetic alloy powders are atomized powders obtained by atomization methods such as water atomization and gas atomization, flattened powders obtained by flattening them, and flattened powders obtained by pulverizing alloys cast into strips. preferable. In the case of atomized powder, the average particle diameter (median diameter D50) is preferably 3 μm or more and 80 μm or less. In the case of flat powder, it is preferable that the thickness is 10 μm to 50 μm and the grain size in the direction perpendicular to the thickness direction is more than twice to 6 times the thickness. Powders of soft magnetic alloys are mixed with powders of different compositions or different shapes (for example, atomized powder and flattened powder, etc.). A mixture of metal powder may also be used. Among them, Fe-based amorphous soft magnetic alloy powder having a saturation magnetic flux density exceeding 1.2 T is preferable. A flat powder obtained by pulverizing a ribbon is preferable because it can be used as a powder magnetic core having shape anisotropy.

The split core 5, which is a powder magnetic core using flat powder, will be described. A pressing direction P indicated by an arrow in FIG. 8 indicates a pressing direction in compression molding. General compression molding uses a mold that includes a fixed mold and a movable mold. A pair of movable molds are arranged above and below the fixed mold to close the opening of the fixed mold, and the soft magnetic alloy powder is placed in the cavity partitioned by the opening of the fixed mold and the lower movable mold that is passed through the opening. is filled, the upper and lower movable molds are slid in the direction toward each other (direction P in FIG. 8), and the granulated powder in the cavity is compression-molded to mold the split cores 5 . The granulated powder contains a soft magnetic alloy powder, an organic binder such as an acrylic resin or an epoxy resin, or an inorganic binder such as water glass. obtained by a spray dryer. By using granulated powder, the powder feeding property (powder fluidity) into the cavity during molding is high, and the molding density of the split cores 5 can be increased. Molding can be performed at a pressure of 5 GPa or more and 2 GPa or less for a holding time of about several seconds. The pressure and holding time are appropriately set according to the content of the binder and the required strength of the compact.

In the case of the arc-shaped split core 5, the fixed mold has a C-shaped through hole with an R at each corner, and the movable mold corresponds to the C-shaped through hole, It is a C-shaped polygonal column with rounded corners. According to such a form, chamfering can be easily formed between the circumferential end surface 6 of the split core 5 and the inner peripheral surface 11 side and the outer peripheral surface 12 side. When chamfering is formed on the end face 7 side of the split core 5 in the axial direction of the annular magnetic core 10, complex multistage molding by changing the pressure direction and machining after molding are required. Since the rectangular conducting wire does not straddle the combined portion 8 on the side of the end surface 7, it is not easily affected by leakage magnetic flux, and it is not necessary to intentionally form a chamfer as in the case of the inner peripheral surface.

Further, the thickness direction of the flat soft magnetic alloy powder tends to be aligned with the pressing direction P. As shown in FIG. By forming the end surface 7 of the split core 5 as a pressing surface by the movable die, the split core 5 is easily magnetized in the plane orthogonal to the pressurizing direction P. It can have shape magnetic anisotropy.

FIG. 9 is an exploded perspective view of a core case used in a reactor according to an embodiment of the present invention, and FIG. 10 is a plan view showing a state in which split cores are accommodated in the first case member. The core case 20 is composed of two case members, a first case member 21 and a second case member 22 . The first case member 21 in which the split cores are arranged has a C-shaped space 25 with a bottom, and has a shape defined by an outer wall portion 26 and an inner wall portion 27 integrally extending upward from the bottom portion. At one end in the circumferential direction of the first case member 21, there is a receiving portion 23 recessed stepwise on the side of the bottomed space 25, and at the other end in the circumferential direction, a protruding piece recessed stepwise on the outer peripheral side. A portion 24 is formed. The second case member 22 closes the bottomed space 25 of the first case member 21 and is formed in a C-shaped plate. At one end of the second case member 22, there is formed a receiving portion 28 whose upper side in the drawing is recessed in a stepped manner, and at the other end side, a protruding portion 29 whose lower side is recessed in a stepped manner. With such a configuration, the core case 20 having the same shape can be combined in an annular shape, so that the number of parts can be reduced and the manufacturing cost can be lowered.

The core case 20 is made of insulating resin. What is its material? Any resin having insulating properties, mechanical strength, chemical resistance, heat resistance, moisture resistance and moldability may be used. PPS (Polyphenylene sulfide) resin, liquid crystal polymer, PET (Polyethylene terephthalate) resin, PBT (Polybutylene terephthalate) resin, ABS (Acrylonitrile butadiene butadiene butadiene resin) is preferable. , and those molded by a known method such as an injection molding method can be used.

As shown in FIG. 10, the core case 20 containing the split core 5 is formed by housing the split core 5 in the bottomed space of the first case member 21 and closing it with the second case member 22 . Both ends of the core case 20 are open, and the end faces 6 of the split cores 5 appear therefrom. The end faces 6 of the split cores 5 are positioned substantially uniformly downward from the circumferential ends 23 of the core case 20 .

Next, a method for manufacturing the reactor 1 will be described. As shown in FIG. 3, a pair of core cases 20 holding a flat rectangular conducting wire longitudinally wound coil 30 using a flat conducting wire and a pair of core cases 20 holding a split core 5 are prepared. insert the core case 20 of . The core case 20 is inserted while being deformed so as to cover the core case 20 along the periphery of the core case 20, and the protruding piece at the end of the core case 20 is fitted into the receiving portion. Combine in a circle. In this state, as shown in FIG. 4, the longitudinally wound coil 30 of rectangular conducting wire is wound around the outer circumference of the core case 20 .

By assembling the core case 20 with the projecting piece and the receiving part, the assembling position can be accurately determined and can be easily performed, and the assembling of the split cores 5 can be performed with little variation and high accuracy. can be done. Further, the same core case 20 can be used even when an insulating spacer such as a resin film, ceramic, or oil paper is inserted between the end faces of the pair of split cores 5 to form a magnetic gap. The insulating spacer may be adhered to the end surface of the split core 5 with an epoxy resin.

A silicone resin is injected into the core case 20 as a filler, whereby the core case 20 and the split core 5 are temporarily fixed. The split cores 5 in the core case 20 are movable in the circumferential direction until the silicone resin is cured at room temperature. Therefore, even if the positions of the split cores 5 in the core case 20 are slightly misaligned, the end surfaces of the split cores 5 move close to each other or in contact with each other when the core case 20 is assembled into an annular shape. Can be combined.

A wide portion 33 as shown in FIG. On the surface of the core case 20, a streak-like combined portion is formed as a result of combination. Transform. The epoxy resin filled in the core case 20 is cured to fix the split cores 5 in the core case 20, and the core cases 20 are fixed together by an adhesive means such as an epoxy resin to form the reactor 1. - 特許庁With such a configuration, the reactor 1 can be configured such that the rectangular conductor straddles the combined portion 8 of the annular magnetic core 10 only on the inner peripheral surface side of the annular magnetic core 10 .

Note that the wide portion 33 may be formed in advance by widening the space between the adjacent flat conductor wires of the vertically wound flat conductor wire coil 30 and deforming them. In that case, the wide portion 33 may be positioned at the combined portion 8 of the annular magnetic core 10 using the combined portion of the core case 20 as a guide.

A coil movement restricting member such as a clip may be attached so that the wide portion 33 will not be misaligned due to movement of the coil after assembly, or the wide portion of the vertically wound flat wire coil may be used to separate the flat wire and the core case. It can be fixed by gluing.

The present invention is not limited to the contents of the above description, and can be modified as appropriate within the scope of the same technical idea. Advantageous Effects of Invention According to the reactor of the present invention, it is possible to reduce the influence of leakage flux at the combined portion of the annular magnetic core composed of split cores.

1 Reactor 5 Split Core 10 Annular Magnetic Core 20 Core Case 30 Rectangular Conducting Wire Vertical Winding Coil

Claims (10)

A reactor comprising an annular magnetic core combined with split cores, a core case enclosing the split cores and combined in an annular shape, and a longitudinally wound rectangular conducting wire coil wound around the core case,
The longitudinally-wound flat conductor wire coil has a narrow width portion with a narrow interval between adjacent flat conductor wires and a wide width portion between one end and the other end of the coil, and the wide width portion is located at the joint portion of the split core. ,
In the wide portion, the rectangular conducting wire straddles the combined portion only on the inner peripheral surface side of the annular magnetic core, and the rectangular conductive wire straddles the combined portion obliquely on the inner peripheral surface side of the annular magnetic core . The reactor according to claim 1,
A reactor in which each of the split cores has a chamfered portion on an end surface serving as the combined portion, and the chamfered portion is at least on the inner peripheral surface side of the annular magnetic core. The reactor according to claim 1 or 2,
A reactor in which the number of times that a rectangular conducting wire straddles the combined portion on the inner peripheral surface side of the annular magnetic core is one. The reactor according to any one of claims 1 to 3,
A flat wire vertically wound coil is a reactor in which the flat wire does not straddle any combination part at both ends. The reactor according to any one of claims 1 to 4,
The combined portion is a reactor positioned rotationally symmetrically about 180 degrees with respect to the center of the annular magnetic core. The reactor according to any one of claims 1 to 5,
In the longitudinally-wound rectangular conductor wire coil, the interval between adjacent rectangular conductor wires is the widest at the coil intermediate portion. The reactor according to any one of claims 1 to 6,
Each of the split cores is a powder magnetic core using flat powder of Fe-based amorphous soft magnetic alloy, and the reactor is easily magnetized in the circumferential direction of the annular magnetic core. A step of preparing a longitudinally wound flat conductor wire coil in which the flat conductor wire is longitudinally wound;
a step of inserting a core case holding a split core from both ends of the longitudinally wound rectangular conducting wire coil and combining them, forming an annular magnetic core with the split cores, and mounting the longitudinally wound rectangular conducting wire coil on the core case;
A space between adjacent flat conducting wires of the longitudinally wound flat conducting wire coil at a position corresponding to the joining portion of the split cores so that the flat conducting wire straddles the joining portion of the split cores only on the inner peripheral surface side of the annular magnetic core. is expanded in the circumferential direction of the annular magnetic core and deformed to form a wide portion, or the wide portion formed by expanding the interval between adjacent flat conductor wires of the longitudinally wound rectangular conductor wire coil and deformed in advance is applied to the combined portion of the split core. a step of positioning ;
A method of manufacturing a reactor, wherein in the wide portion, the rectangular conducting wire straddles the combined portion only on the inner peripheral surface side of the annular magnetic core, and the rectangular conductive wire straddles the combined portion obliquely on the inner peripheral surface side of the annular magnetic core. A method for manufacturing the reactor according to claim 8,
A method for manufacturing a reactor, comprising the step of attaching a coil movement restricting member for restricting movement of the vertically wound flat conductor wire to a core case appearing in the wide portion of the vertically wound flat conductor wire. A method for manufacturing the reactor according to claim 8,
A method for manufacturing a reactor, comprising a step of adhering a flat conducting wire and a core case at a wide portion of the longitudinally wound flat conducting wire coil.

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