KR102362161B1 - Electromagnetic induction apparatus and method of producing the same - Google Patents

Abstract

Provided are an electromagnetic induction machine capable of stably and appropriately matching a bonding surface of a core, and a manufacturing method of the electromagnetic induction machine.
An electromagnetic induction machine according to the present invention includes a core holding body for holding a core, two core pieces held by the core holding body, and biasing means for applying a force to one of the two core pieces, At least one of the two core pieces is a core having a base and a leg comprising a plurality of magnetic pieces, and the two core pieces are arranged so that the joint surfaces of the two core pieces are abutted to form a magnetic circuit, It is held by the core holding body in the state.

Description

Electromagnetic induction apparatus and method of manufacturing an electromagnetic induction machine

The present invention relates to an electromagnetic induction machine and a method for manufacturing an electromagnetic induction machine, and more particularly to an electromagnetic induction machine including a core constituted by combining a plurality of core pieces, and a method for manufacturing the electromagnetic induction machine.

Conventionally, an electromagnetic induction machine used as a transformer for a switching power supply or a choke coil is configured to include, for example, a bobbin, a coil wound around an axis of the bobbin, and a magnetic core using a ferrite core or the like. The magnetic core, for example, like UI type, EI type, and UU type, is assembled by facing two types of cores at a joint surface, and one closed magnetic path is formed. Except for the case where a gap (gap) is intentionally formed on the junction surface, it is necessary to fix the junction surface so as not to create a gap as much as possible because it affects the magnetic properties. As a fixing method, it is common to apply a varnish impregnation treatment after fixing the core with a tape, or to use an adhesive. For example, Patent Document 1 discloses a method for fixing an EI-type ferrite core using an adhesive.

Japanese Patent Application Laid-Open No. 7-57942

However, these assembling methods require varnish curing time after impregnation and curing time after adhesive application, and imbalance in quality occurs due to non-uniformity in working methods and management methods. As a result, gaps and misalignments occur in the bonding surfaces, which causes defects such as electrical failure and sound. One of the causes of these problems is that the dimensional tolerance of the ferrite core due to the imbalance due to the firing conditions at the time of manufacturing the ferrite core is extremely large compared to that of a normal mold product. As a result, since it is necessary to provide an allowance in the bobbin dimension, there exists a problem that a gap or a shift|offset|difference generate|occur|produces in a joint surface. In addition, for example, when current flows through the coil, the coil or core generates heat, and due to the difference in the coefficient of thermal expansion of the coil, core, bobbin, etc. There is a problem that a gap or a shift occurs in the joint surface.

The present invention has been made in order to solve such a subject, and an object of the present invention is to provide an electromagnetic induction machine and a method for manufacturing an electromagnetic induction machine capable of stably and appropriately matching the bonding surfaces of the cores.

In order to achieve the above object, the present invention provides a core holding body for holding a core, two core pieces held by the core holding body, and one of the two core pieces. A biasing means for applying a force is provided, wherein at least one of the two core pieces is a legged core comprising a base and a plurality of self-contained cores, the two core pieces comprising: It is an electromagnetic induction machine characterized in that it is arranged so that the joint surfaces of two core pieces are abutted to form a magnetic circuit, and is held by the core holding body in a state pressed by the biasing means.

According to the present invention constituted in this way, the two core pieces are held by the core holding body in a state pressed by the biasing means. Thereby, the state in which the joint surfaces of the two core pieces are pressed against each other is maintained, and the two core pieces are fixed. In this way, a constant pressure force is always applied to the joint surface of the core and the two core pieces are fixed, making it possible to keep the joint surface of the core in a stable state, resulting in dimensional errors and time delays occurring during the manufacture of electromagnetic induction machines. It is possible to suppress the occurrence of gaps or misalignment of the joint surfaces due to changes in the joint.

Further, in order to achieve the above object, the present invention includes a coil, a body part on which the coil is wound, and side plate parts provided at both ends of the body part, and the body part and the side plate part are formed in the central part of the body part. A core holder having a through hole penetrating in the axial direction of the body, the side plate portion having a pair of leg portions extending symmetrically with the width of the through hole interposed therebetween; , in the U-shaped core comprising an I-shaped core disposed through the through-hole, and a base and a pair of magnetic pieces at both ends of the base, wherein the inner surface of the pair of magnetic pieces is disposed on the outer surface of the side plate part, In addition, a U-shaped core arranged so that the tip surfaces of the pair of magnetic pieces are abutted to the side surfaces of both ends of the I-shaped core protruding from the through-hole to form a magnetic circuit, and the I-shaped core is in contact with the U and biasing means disposed on a side opposite to the side on which the mold core is disposed, wherein the core holding body holds the U-shaped core on the respective tip surfaces in the extending direction of the pair of leg parts. A latch part for latching is formed on the inside of the sieve, and the U-shaped core becomes a latch part by the latch part in a state in which the biasing means is pressed through the I-shaped core, and the pair of U-shaped cores It is an electromagnetic induction machine, characterized in that the front end surface of the magnetic field and the side surfaces of both ends of the I-type core are held in a pressed state to each other, and the I-type core and the U-type core are fixed.

According to the present invention configured as described above, the U-shaped core becomes a latch hook by the latch unit in a state in which the biasing means is pressed through the I-type core, and the pressed biasing means converts the I-type core to the U-shaped core by its restoring force. Pressed to the side, the pressed U-shaped core receives a force to the I-shaped core side by the latch portion. As a result, the side surfaces of the both ends of the I-shaped core and the pair of self-angular tip surfaces of the U-shaped core, that is, the joint surface of the I-shaped core and the U-shaped core, are held in a state where they are pressed against each other, and the I-shaped core is maintained. and the U-shaped core is fixed. Since the I-type core and the U-type core are fixed in this way, it is possible to suppress the occurrence of gaps or misalignment of the bonding surfaces due to dimensional errors or changes over time that occur during the manufacture of the electromagnetic induction machine.

Further, in the present invention, preferably, the biasing means is a leaf spring attached to the core holding body.

According to the present invention constituted in this way, the biasing means can be a leaf spring. Thereby, since the I-type core and the U-type core are attached to the core holding body in a state in which the leaf spring is urged (compressed), the I-type core can be constantly pressed down by the leaf spring.

Preferably, in the present invention, the side plate portion has a cross-linking portion connecting the outwardly protruding portions in the axial direction of the body portion respectively formed at the tip portion in the extending direction of the pair of leg portions, and the cross-linking portion A latch portion for latching the U-shaped core to the inside of the core holding body is formed on the front end surface of the pair of leg portions in the extending direction.

According to the present invention constituted as described above, it is possible to accommodate the U-shaped core inside the cross-linked part and to hold the U-shaped core in a more stable state using the latch portion formed in the cross-linked part.

In the present invention, preferably, the core holding body is equipped with a terminal protruding in the extending direction from the respective distal end faces of the pair of leg portions in the extending direction, and each of the distal end faces and the above Insertion holes through which the inner surface of the side plate part can be inserted are formed, respectively, and the lead wire of the coil is connected to each of the terminals through the insertion holes.

According to the present invention configured as described above, it is possible to configure the lead wire of the coil wound around the body to be connected to the terminal attached to the core holding body. Thereby, it can be set as the electromagnetic induction machine used by inserting a terminal into a board|substrate.

Preferably, in the present invention, the electromagnetic induction machine further includes a primary coil made of a plate-shaped conductor wound once around the base of the U-shaped core, and the coil is a secondary comprising a plurality of wound conductor wires. it is coil

According to the present invention constituted as described above, it is possible to obtain an electromagnetic induction machine used as a transformer for converting relatively low voltage and high current power into high voltage and low current power.

Further, in order to achieve the above object, the present invention includes a body part on which the coil is wound and side plate parts provided at both ends of the body part, and the body part and the side plate part are provided in the central part of the body part as an axis of the body part. A method for manufacturing an electromagnetic induction machine manufactured using a core holder in which a through hole penetrating in the direction is formed, the side plate portion of which is formed with a pair of leg portions extending symmetrically with the width of the through hole interposed therebetween In the following, the step of winding a coil on the body portion, disposing an I-shaped core through the through-hole, and at the same time arranging a biasing means in contact with the I-shaped core; a base and both ends of the base; The inner surface of the pair of magnetic pieces of the U-shaped core composed of a pair of magnetic pieces of a step of arranging the U-shaped core so that the tip surfaces are abutted to form a magnetic circuit; It is a manufacturing method of an electromagnetic induction machine characterized by having the step of holding the core holding body by a latch portion formed on each tip surface in the extending direction of the pair of leg portions of the core holding body.

According to the present invention configured as described above, the latch unit presses the U-shaped core to the I-shaped core side and latches it, and the pressurized biasing means presses the I-shaped core to the U-shaped core side by the restoring force, and pressurizes. The U-shaped core is subjected to a force on the I-shaped core side by the latch portion. As a result, the side surfaces of the both ends of the I-shaped core and the pair of self-angular tip surfaces of the U-shaped core, that is, the joint surface of the I-shaped core and the U-shaped core, are held in a state where they are pressed against each other, and the I-shaped core is maintained. and the U-shaped core is fixed. Since the I-type core and the U-type core are fixed in this way, it is possible to suppress the occurrence of gaps or misalignment of the bonding surfaces due to dimensional errors or changes over time that occur during the manufacture of the electromagnetic induction machine. In addition, since the conventional tape treatment and varnish impregnation treatment or treatment with an adhesive can be eliminated or reduced, it becomes possible to assemble the electromagnetic induction machine in a simpler and easier manner and at a lower cost.

ADVANTAGE OF THE INVENTION According to the electromagnetic induction machine and the manufacturing method of the electromagnetic induction machine of this invention, the bonding surface of a core can be matched stably and suitably.

1 is an exploded perspective view of an electromagnetic induction machine according to an embodiment of the present invention.
Fig. 2 is a perspective view of an electromagnetic induction machine according to an embodiment of the present invention.
Fig. 3 is a perspective view of a bobbin in the electromagnetic induction machine of Fig. 2;
Fig. 4 is a side view of a bobbin in the electromagnetic induction machine of Fig. 2;
Fig. 5 is a bottom view of the bobbin in the electromagnetic induction machine of Fig. 2;
Fig. 6 is a bottom view of the electromagnetic induction machine of Fig. 2;
Fig. 7 is a cross-sectional view of a plane parallel to the axial direction of the body in the electromagnetic induction machine of Fig. 2;

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on an accompanying drawing. In addition, in each figure, the same code|symbol shall indicate the same or equivalent part unless there is particular notice, and for convenience, the vertical and horizontal scale of a member or part may be shown differently from the actual thing. Although the electromagnetic induction device of the present invention is mainly described as being applied to a current transformer for mounting on a substrate, it can also be applied to a normal transformer or a choke coil.

1 is an exploded perspective view of an electromagnetic induction machine 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the electromagnetic induction machine 1 . The electromagnetic induction machine 1 includes a bobbin 10 , an I-shaped core 20 , a U-shaped core 30 , a biasing means 40 , a primary coil 50 , and a secondary coil 60 . includes In addition, in each figure including FIG. 1, in order to simplify description, the coordinate axis of the mutually orthogonal x-direction, y-direction, and z-direction is shown. In addition, in this specification, unless otherwise indicated, the upward direction represents the +z-axis direction, and the downward direction represents the -z-axis direction.

Fig. 3 is a perspective view of the bobbin 10 in the electromagnetic induction machine 1 of Fig. 2, Fig. 4 is a side view of the bobbin 10 (viewed in the x-axis direction), and Fig. 5 is the bobbin ( 10) is a bottom view (viewed from the bottom). The bobbin 10 includes a body portion 11 on which a coil is wound, and side plate portions 12 provided at both ends of the body portion 11 in the axial direction (y-axis direction). The bobbin 10 is formed with a through hole 11a penetrating the body 11 and the side plate 12 in the axial direction of the body 11 . In addition, in order to secure a space for winding the coil, as shown in FIG. 4 , the bobbin 10 is a component of the bobbin 10 below the body 11 , for example, the side plate 12 . It is preferable to be formed so that there are no components.

The side plate portion 12 includes an awning portion 12a formed perpendicular to the axial direction of the body portion 11 so as to sandwich the coil wound around the body portion 11 at both ends of the body portion 11 , and the awning portion. As long as it extends symmetrically with the through hole 11a interposed therebetween on the surface on the outer side in the axial direction of the body 11 in the axial direction of the body 11 in (12a), and extends out (downward) from the awning portion 12a It is comprised including the leg part 12b of a pair. However, the pair of leg portions 12b may be formed to extend symmetrically with the width of the through hole 11a interposed therebetween. It may be formed to extend symmetrically with the width of the through hole 11a interposed therebetween.

Each of the leg portions 12b has a terminal block 12c formed at the distal end in the extending direction. Each terminal block 12c has a terminal 13, and the terminal 13 protrudes in the extending direction from the front end face of the leg portion 12b in the extending direction (downward direction). The protruding terminal 13 is inserted into a wiring board (not shown).

In the side plate part 12, as shown in FIG. 3, a bridge part 12d which connects the parts protruding outward in the axial direction of the trunk|drum 11 formed in each terminal block 12c of a pair of leg part 12b. ) is further formed. The window portion 12e for accommodating the U-shaped core 30 is formed by the awning portion 12a, the leg portion 12b, and the bridge portion 12d configured in this way, as described later.

As shown in FIG. 5 , the leg portion 12b and the bridge portion 12d have the window portion 12e in the direction approaching the body 11 (upward direction) on the front end surface in the direction in which the leg portion 12b extends. A latch portion 12f for latching the member passing through is formed inside the bobbin 10 (in the upward direction). The latch portion 12f may include a general latch mechanism, and is preferably formed to protrude from the space between the pair of leg portions 12b.

In another example, the latch portion 12f may be a claw-shaped fixing member. In this case, the fixing member may optionally be in a state that protrudes from the space between the pair of leg portions 12b, or is accommodated in the surface of the leg portion 12b or bridge portion 12d to which the fixing member is attached. have.

The bobbin 10 is one in which the above components are integrally molded. However, the bobbin 10 may be formed integrally by bonding and fixing each separated component. The bobbin 10 is made of, for example, an insulating resin such as polyethylene terephthalate (PET) or phenol (PF).

The I-shaped core 20 is a rectangular parallelepiped magnetic core, for example, a ferrite core or a dust core. The I-shaped core 20 penetrates the through hole 11a and is disposed with both ends protruding from the through hole 11a.

As shown in FIG. 1 , the biasing means 40 is disposed on the opposite side to the side where the U-shaped core 30 is disposed adjacent to (contacted) the I-shaped core 20 . That is, the biasing means 40 is disposed outside the magnetic circuit formed when the coil is energized. The biasing means 40 is made of a member having the same properties as a compression spring (pressing spring). In one example, the biasing means 40 is a leaf spring attached to the bobbin 10 . When the leaf spring is mounted on the bobbin 10 in a compressed state, it presses the I-shaped core 20 in contact by its restoring force. In another example, the biasing means 40 is a leaf spring integrally formed with the bobbin 10 .

The U-shaped core 30 is a U-shaped core composed of a base 31 and a pair of magnetic shells 32 at both ends of the base 31 , and is preferably made of the same material as the I-shaped core 20 . In the U-shaped core 30, the inner surface of the pair of magnetic pieces 32 is disposed on the outer surface of the awning portion 12a (side plate portion 12) between the pair of leg portions 12b of the bobbin 10, Also, the front end surfaces of the pair of magnetic poles 32 are abutted from the bottom to the side surfaces of both ends of the I-shaped core 20 protruding from the through hole 11a to form a magnetic circuit. At this time, the U-shaped core 30 presses the I-shaped core 20 in the upward direction and presses the biasing means 40 through the I-shaped core 20, as shown in Fig. 6 , the latch It becomes a latch by the part 12f and is arrange|positioned. In this state, the pressed urging means 40 urges the I-shaped core 20 to the U-shaped core 30 side by the restoring force thereof, and the pressed U-shaped core 30 has the latch portion 12f ) to receive a force on the I-shaped core 20 side. As a result, the side surfaces of both ends of the I-shaped core 20 and the front end surfaces of the pair of magnetic horns 32 of the U-shaped core 30 are kept pressed against each other.

In this way, a constant pressure force is always applied to the joint surface of the core, and the I-type core 20 and the U-type core 30 are fixed. It is possible to suppress the occurrence of gaps and deviations of the resulting joint surfaces.

In order to be configured as described above, the I-shaped core 20 is separated from both ends of the through hole 11a by the length (length in the y-axis direction) of the width of the front end surface of the self-angle 32 of the U-shaped core 30 . It is preferably configured to protrude. In addition, it is preferable that the biasing means 40 has a size capable of covering the side surface of the I-shaped core 20 .

Moreover, by setting it as the above-mentioned structure, the U-shaped core 30 is accommodated inside the bridge|crosslinking part 12d, and, while using the latch part 12f formed in the bridge|crosslinking part 12d, the U-shape in a more stable state. The core 30 can be stored. However, in the side plate part 12, the bridge|crosslinking part 12d does not need to be formed.

The primary coil 50 is a coil wound once around the base 31 of the U-shaped core 30, and is, for example, a plate-shaped conductor in which both ends are bent. The plate-shaped conductor is preferably a copper plate. The secondary coil 60 is a conducting wire wound around the body portion 11 of the bobbin 10 , and the conducting wire may be one or a plurality of litz wires, or may be one or a plurality of single wires. Since the primary coil 50 and the secondary coil 60 are disposed adjacent to each other, an insulating cover 51 is attached to the primary coil 50 of the inner portion of the bobbin 10 as shown in FIG. 1 .

Both ends of the primary coil 50 are directly inserted into a wiring board (not shown). Inside the bobbin 10, there are insertion holes (not shown) through which the inner surface of the awning portion 12a on the side where the body portion 11 is disposed and the tip surface in the direction in which the leg portions 12b extend, respectively. is formed for each terminal 13 of , and the lead wire of the secondary coil 60 is drawn out through each through hole and is connected to the terminal 13 . When the secondary coil 60 is one coil, both ends of the lead wire of the secondary coil 60 are a pair of leg parts 12b formed in the side plate part 12 of one end of the body part 11 . are respectively connected to the terminals 13 protruding from the . In this case, the lead wire of the coil is not connected to the terminal 13 protruding from the pair of leg portions 12b formed in the side plate portion 12 of the other end of the body portion 11 .

In one modification, the primary coil 50 is wound around the body 11 of the bobbin 10 like the secondary coil 60 instead of being wound around the base 31 of the U-shaped core 30 . is recommended In this case, the primary coil 50 and the secondary coil 60 are insulated by winding an insulating tape, for example. In this case, the leader wire of the primary coil 50 is a pair formed in the side plate portion 12 of the other end of the body 11 to which the leader wire of the secondary coil 60 is not connected. It is connected to the terminal 13 which protrudes from the leg part 12b of .

7 is a cross-sectional view VII-VII of a plane parallel to the axial direction of the body 11 in the electromagnetic induction machine 1 of FIG. 2 . As shown in the figure, the pressurizing means 40 pressurizes the I-shaped core 20, and the I-shaped core 20 is interposed therebetween. On the other hand, the pressed U-shaped core 30 becomes a latch by the latch portion 12f and is held while receiving a force from the I-shaped core 20 side, and the two core pieces are fixed.

Said bobbin 10 is one example of a core holding body. In addition, the I-shaped core 20 and the U-shaped core 30 are examples of two core pieces held by the core holder. For example, the U-shaped core 30 may be an E-shaped core. In this case, the body portion 11 and the side plate portion 12 are added to the bobbin 10, and the central portion of the E-type core is self-aware. By setting the I-shaped core 20 to the side face of the central portion of the core 20, it is possible to obtain an electromagnetic induction machine that can be fixed so as not to cause gaps or displacements on the joint surfaces of the cores of the two core pieces.

Next, the manufacturing method of the electromagnetic induction machine 1 is demonstrated. First, the bobbin 10 shown in Fig. 3 is prepared, the secondary coil 60 is wound around the body 11, and the lead wires at both ends of the secondary coil 60 are inserted into the respective insertion holes, respectively. Temporarily fixed by tethering to the terminal 13 of After temporarily fixing, the secondary coil 60 and the terminal 13 are connected by soldering at a temporarily fixed location by dipping in a solder tank or the like.

Subsequently, the I-shaped core 20 and the leaf spring (pressing means) 40 brought into contact with the I-shaped core 20 are disposed through the through-hole 11a. At this time, the leaf spring 40 is placed in contact with the upper side surface of the I-shaped core 20 as shown in FIG. 1 .

In addition, the primary copper plate (copper plate for primary coil) 50 in which both ends are bent has the tip of the bent both ends in the downward direction, and as shown in FIG. 1 , the axial direction (y-axis direction) of the body part 11 is shown. ) and the central portion of the primary copper plate 50 are disposed below the body 11 so that the axial direction is perpendicular to each other. Before disposing, an insulating sheet is mounted on the central portion of the primary copper plate 50 . In addition, both ends of the primary copper plate 50 may be folded and bent after attaching the primary copper plate 50 to the bobbin 10 .

In order to maintain this state, the inner surface of the pair of self-angles 32 of the U-shaped core 30 is disposed on the outer surface of the awning portion 12a between the pair of leg portions 12b of the bobbin 10 and , from the lower side of the primary copper plate 50 so that the tip surfaces of the pair of magnetic poles 32 are abutted to the side surfaces of both ends of the I-shaped core 20 protruding from the through hole 11a to form a magnetic circuit. Position the U-shaped core 30 in the direction. At this time, the U-shaped core 30 is disposed by passing the pair of magnetic pieces 32 into the window portion 12e from the lower side to the upper side.

In order to fix the position of the U-shaped core 30 in the state arranged as described above, the U-shaped core 30 is pressed against the I-shaped core 20, and a leaf spring ( 40) is forced. In the pressed state in this way, the base 31 of the U-shaped core 30 is locked by the latch portions 12f formed on the respective tip surfaces in the extending direction of the pair of leg portions 12b of the bobbin 10. By latching the outer surface, the U-shaped core 30 is held. In this way, the electromagnetic induction machine 1 to which the two core pieces 20 and 30 were fixed can be manufactured.

By setting it as such a structure, in this embodiment, the conventional tape process, a varnish impregnation process, or the process with an adhesive agent can be eliminated or reduced. Thereby, it becomes possible to assemble the electromagnetic induction machine 1 by a simpler and easier method and more inexpensively.

Next, the effect of the electromagnetic induction machine 1 according to the embodiment of the present invention will be described. In this embodiment, the U-shaped core 30 becomes a latch by the latch part in a state in which the biasing means 40 is pressed through the I-shaped core 20, and the pressed biasing means 40 is the The I-shaped core 20 is pushed down to the U-shaped core 30 side by the restoring force, and the pressed U-shaped core 30 receives a force to the I-shaped core 20 side by the latch portion 12f. As a result, the side surfaces of both ends of the I-shaped core 20 and the front end surfaces of the pair of magnetic pieces 32 of the U-shaped core 30 , that is, the bonding surface between the I-shaped core 20 and the U-shaped core 30 . , are maintained in a state in which they are pressed against each other, and the I-shaped core 20 and the U-shaped core 30 are fixed. Since the I-type core 20 and the U-type core 30 are fixed in this way, it is possible to suppress the occurrence of gaps or misalignments in the bonding surfaces due to dimensional errors or changes over time that occur during the manufacture of the electromagnetic induction machine. .

In the present embodiment, the biasing means 40 may be a leaf spring. Thereby, since the I-shaped core 20 and the U-shaped core 30 are attached to the bobbin 10 in a state in which the leaf spring is urged (compressed), the I-shaped core 20 is always maintained by the leaf spring. It can be done under pressure.

In the present embodiment, the U-shaped core 30 is accommodated inside the bridged portion 12d, and the U-shaped core 30 is held in a more stable state using the latch portion 12f formed in the bridged portion 12d. can be kept.

In this embodiment, the lead wire of the coil wound around the trunk|drum 11 can be comprised so that it may connect to the terminal attached to the core holding body. Thereby, it can be set as the electromagnetic induction machine 1 used by inserting the terminal 13 into a board|substrate.

Each of the Examples described above is an illustration for explaining the present invention, and the present invention is not limited to these Examples. Each of the examples can be applied to any embodiment of the present invention in any combination as long as there is no contradiction. That is, the present invention can be implemented in various forms without departing from the gist thereof.

1: electromagnetic induction machine
10: bobbin (core holding body)
11: body
11a: through hole
12: side plate
12a: awning
12b: Legs
12c: terminal block
12d: bridging part
12e: prostitute
12f: latch part
13: terminal
20: I-shaped core
30: U-shaped core
31: base
32: awareness
40: tax means
50: primary coil
51: insulation cover
60: secondary coil

Claims (9)

delete coil and
A core holder comprising: a body on which the coil is wound; and side plates provided at both ends of the body, wherein a through hole penetrating the body and the side plates in the axial direction of the body is formed in the central portion of the body; A core holding body in which a pair of leg portions extending symmetrically across the width of the through hole are formed in the side plate portion;
an I-type core disposed through the through hole;
In the U-shaped core composed of a base and a pair of magnetic horns at both ends of the base, the inner surface of the pair of magnetic horns is disposed on the outer surface of the side plate portion, and protrudes from the through hole A U-shaped core arranged so that the front end surfaces of the pair of magnetic pieces are abutted to the side surfaces of both ends of the I-shaped core to form a magnetic circuit;
and a biasing means disposed on the side opposite to the side on which the U-shaped core is disposed and in contact with the I-shaped core,
A latch portion for latching the U-shaped core to the inside of the core holding body is formed in the core holding body, on each front end surface of each of the pair of leg parts in the extending direction;
The U-shaped core becomes a latch by the latch unit in a state where the biasing means is pressed through the I-shaped core, and the front end surfaces of a pair of magnetic angular portions of the U-shaped core and both ends of the I-shaped core are provided. An electromagnetic induction machine in which the sides are kept pressed against each other. 3. The method of claim 2,
and the biasing means is a leaf spring mounted on the core holding body. 4. The method of claim 2 or 3,
In the side plate portion, a cross-linking portion connecting the outwardly protruding portions in the axial direction of the body portion formed at the distal end portion in the extending direction of the pair of leg portions is formed, and a line in the direction in which the pair of leg portions of the cross-linking portion extends An electromagnetic induction machine in which a latch portion for latching the U-shaped core to an inner side of the core holding body in cross section is formed. 4. The method of claim 2 or 3,
The core holding body is equipped with a terminal protruding from each of the distal end faces in the extending direction of the pair of leg parts in the extending direction, and has insertion holes through which each of the distal end faces and the inner surface of the side plate can be inserted. are formed respectively, and the lead wire of the coil is connected to each of the terminals through the insertion hole. 6. The method of claim 5,
The electromagnetic induction group,
Further comprising a primary coil made of a plate-shaped conductor wound once on the base of the U-shaped core,
The coil is a secondary coil made of a plurality of wound conducting wire, electromagnetic induction machine. A core holding body comprising a body on which a coil is wound and side plates provided at both ends of the body, wherein a through hole penetrating the body and the side plates in the axial direction of the body is formed in a central portion of the body, the core holding body comprising: In the manufacturing method of an electromagnetic induction machine manufactured using the core holding body in which the side plate part is formed with a pair of leg parts extending symmetrically across the width of the through-hole,
winding a coil around the body;
A step of disposing an I-shaped core by penetrating the through-hole and placing a biasing means in contact with the I-shaped core;
The inner surface of a pair of magnetic shells of a U-shaped core comprising a base and a pair of magnetic shells at both ends of the base is disposed on the outer surface of the side plate, and the I protruding from the through hole a step of arranging the U-shaped core so that the tip surfaces of the pair of respective parts are abutted to the side surfaces of both ends of the core to form a magnetic circuit,
The step of arranging the U-shaped core,
The U-shaped core is held in a state in which the U-shaped core is pressed by the biasing means with the I-shaped core interposed therebetween, and is stored by latch portions formed on respective tip surfaces of the pair of leg portions of the core holding body in the extending direction. A method of manufacturing an electromagnetic induction machine, comprising a holding step. 5. The method of claim 4,
The core holding body is equipped with a terminal protruding from each of the distal end faces in the extending direction of the pair of leg parts in the extending direction, and has insertion holes through which each of the distal end faces and the inner surface of the side plate can be inserted. are formed respectively, and the lead wire of the coil is connected to each of the terminals through the insertion hole. 9. The method of claim 8,
The electromagnetic induction group,
Further comprising a primary coil made of a plate-shaped conductor wound once on the base of the U-shaped core,
The coil is a secondary coil made of a plurality of wound conducting wire, electromagnetic induction machine.

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