WO2015194209A1 - Transformer coil bobbin-cum-wound core holder and transformer using same - Google Patents

Abstract

[Problem] To provide a coil bobbin-cum-wound core holder that is used for manufacturing a transformer having a core type structure and being a no-cut wound core type and winding type in which a wound core can be used directly after annealing and is applicable to both low and high frequencies and also to provide a transformer using the coil bobbin-cum-wound core holder. [Solution] A transformer coil bobbin-cum-wound core holder is equipped with at least a synthetic resin frame body (1) for holding a wound core (5) having a pair of parallel linear leg iron portions (8). The frame body comprises a pair of divided frame bodies (1A, 1B) divided into two halves on a surface along both leg iron portions. The divided frame bodies have restricting portions (10) positioned at the inner periphery portion of the opening portion of the wound core and the end surface portions thereof to abut the wound core. A coil winding portion (3) having a two-split structure is integrally formed in the regions corresponding to the leg iron portions or a coil bobbin having a two-split structure is enabled to be fitted onto said regions. Both divided frame bodies are coupled to form a core holding portion (2) for holding the wound core by both restricting portions, and the coil winding portion or the coil bobbin is mounted to enable an electric wire to be wound.

Description

Coil bobbin and wound iron core holder for transformer and transformer using the same

The present invention relates to a coil bobbin / winding iron core holder for a transformer and a transformer using the same, and more particularly, a coil bobbin for manufacturing a transformer usable for high frequency and low frequency by holding a coil and a winding core. The present invention relates to a combined winding core holder and a transformer using the same.

Conventionally, various transformers (transformers) are used for power conversion, voltage conversion, and the like in various electric devices from high power to low power. In such a transformer, a primary coil and a secondary coil are magnetically coupled with an iron core, an alternating current is input to the primary coil to generate a variable magnetic field, and this is transmitted to a secondary coil coupled with a mutual inductance. The current is again converted into current by electromagnetic induction and output to the secondary coil. Transformer iron cores are suitable for materials with low iron loss, high saturation magnetic flux density and high permeability, and are often made of grain-oriented electrical steel sheets that are easily magnetized in a specific direction. In some cases, an amorphous magnetic material is used. As a form of the iron core, there are a laminated core of thin steel plates whose surfaces are insulated to reduce eddy current loss, and a wound iron core wound with a strip-shaped steel plate.

Patent Document 1 includes a pair of iron core winding portions in which a wound iron core obtained by annealing a magnetic steel sheet (band shape, ribbon shape) wound in a cylindrical shape a required number of times is directly wound, and the iron core winding portion. There is disclosed a coil bobbin having a pair of connecting portions that are connected at a required interval and provided with a concave groove around which the winding is wound. Further, the coil bobbin includes an outer frame and an inner frame, and the outer frame includes a pair of iron core winding portions and a pair of connecting portions that connect the iron core winding portions with a predetermined interval therebetween. A first concave groove for providing one winding is provided on the entire outer periphery, and an inner frame is provided with a pair of iron core winding portions and a connecting portion for connecting the iron core winding portions with a predetermined interval, A structure in which a second concave groove for providing two windings is provided on the entire outer periphery, and a pair of the inner frame is assembled to the outer frame so that the second concave groove is positioned inside the first concave groove. Is disclosed. Here, of the first winding and the second winding, one is a primary coil and the other is a secondary coil to constitute a transformer.

In Patent Document 2, a one-turn cut type wound iron core is formed using an amorphous magnetic alloy ribbon, and the wound iron core is formed into a rectangular shape and subjected to magnetic field annealing. A thin insulating member is wound to form an insulation reinforcing portion, and one side of the pair of leg portions is continuous with the yoke portion, and the expanded joint portion on the other side is linear with respect to both leg portions. Maintain the deformed state with the iron core protective cap, prepare an iron core with an overall U-shape, extrapolate the coil to the insulation reinforcement part of both leg iron parts, then remove the iron core protective cap at both joints A wound core transformer is disclosed which is deformed and re-joined to form a yoke part, and the outer periphery of the wound core is surrounded by a reinforcing frame and the state is maintained.

On the other hand, as described in Patent Document 3, a cylindrical wound iron core is formed, a gap penetrating in the axial direction (bus line direction) and the radial direction is formed, and the gap is expanded in the range of elastic deformation. The coil bobbin described in Patent Document 1 is externally fitted to an iron core assembly part (iron core winding part), and a predetermined gap is maintained by sandwiching a spacer in the gap, and the gap is actively used. It may be a core reactor with a gap.

Japanese Patent Application Laid-Open No. 8-051034 JP-A-8-097046 JP 2003-257745 A

By the way, there are two types of arrangements of the iron core and the coil. As shown in Patent Documents 1 and 3, the outer iron shape in which the iron core is arranged around the coil, and as shown in Patent Document 2, There is an inner iron type with coils around. The outer iron type and inner iron type have advantages and disadvantages. Generally, the outer iron type has a large copper loss and a small iron loss. On the contrary, the inner iron type has a small copper loss and a large iron loss. Further, the inner iron type can shorten the length of the coil as compared with the outer iron type, and the low voltage side coil is wound inside, and the high voltage side coil is wound outside the iron core, so that the insulation structure is simplified.

Normally, a wound iron core is manufactured by annealing a magnetic steel strip or an amorphous magnetic alloy thin strip after multiple winding into a cylindrical or ring shape. Here, since a magnetic characteristic will fall if a cut location is provided in a wound iron core, it is desirable that it is uncut. In the non-cut wound core type transformer of Patent Document 1, after annealing the electromagnetic steel strip wound in multiple cylinders, the steel strip is reversely wound so that both ends of the steel strip are inverted, and then the primary coil and the secondary coil are The coil bobbin is wound around in advance so that the both ends of the steel strip are rewound by using a self-restoring force so that both ends of the steel strip are reversed, that is, returned to the annealed state. However, when the wound core is annealed, reverse winding, and rewinding, it is known that a slight shift occurs between the layers of the wound core, the state at the time of annealing does not return completely, and the magnetic properties are reduced, In this method, it is impossible to mount the wound core on the core winding portion of the coil bobbin without changing the magnetic characteristics. Moreover, when an amorphous wound core is used in order to improve the high frequency characteristics, the material steel strip (ribbon) is very thin and becomes brittle when annealed, so the above-described reverse winding and unwinding techniques cannot be employed.

Moreover, although the cut wound core type transformer described in Patent Document 2 uses an amorphous wound core, since it is a one-turn cut method of an amorphous magnetic alloy ribbon, the leakage of magnetic flux generated at the junction is prevented. It cannot be completely prevented, thereby not only deteriorating the magnetic properties but also causing a beat. Needless to say, the core reactor with a gap described in Patent Document 3 is a kind of a transformer with a wound core type.

Accordingly, in view of the above-described situation, the present invention intends to solve the problem of manufacturing an uncut wound core type and electric wire entrainment type transformer that can be used in an inner iron type structure while the wound core is in an annealed state. Therefore, the present invention provides a coil bobbin / winding iron core holder that can be used for both low frequency and high frequency applications, and also provides a transformer using the same.

In order to solve the above-described problems, the present invention provides a coil bobbin used for manufacturing an uncut wound core type and electric wire winding type transformer that has an inner iron structure and can be used as it is after annealing the wound core. It is a wound core holder, made of a synthetic resin that holds a wound iron core having a pair of parallel straight leg portions sandwiched by a magnetic steel strip wound in a ring shape a predetermined number of times and sandwiching a central opening. The frame includes at least a pair of divided frames that are divided into two along the surfaces of both leg iron portions, and the divided frame includes an inner peripheral portion and an end surface portion of the opening of the wound core. And a coil winding portion having a split structure that is divided into two portions along the leg iron portion at a portion corresponding to the leg iron portion. A coil bobby having a split structure that is integrally formed or divided into two along the surface of the leg portion. Are formed so as to be externally fitted, and both split frame bodies are connected by engaging portions formed at the joining end portions thereof to form an iron core holding portion that holds the wound iron core at both regulating portions, and a portion corresponding to the leg iron portion A coil bobbin / winding iron core holder for a transformer is formed, in which a coil winding part is formed so as to cover the leg iron part or a coil bobbin is attached so that an electric wire can be wound (claim 1). .

Here, the frame body is divided at the center in the axial direction of the wound iron core, and a first engagement portion is formed on one side with respect to the center line at the joining end of the pair of divided frame bodies, and on the other side. It is preferable that a second engagement portion that can engage the first engagement portion is formed, and that both divided frame bodies have the same shape and are 180-degree rotationally symmetrical with each other.

Further, the restriction portion of the divided frame body includes a standing wall portion corresponding to the entire inner peripheral portion of the opening portion of the wound core and a substrate portion corresponding to the entire periphery of one end surface portion in the axial direction of the wound core. (Claim 3).

And it is the outer periphery of the coil winding part or the coil bobbin, and is divided into two on the surface along the leg iron part so as to cover the primary coil wound around the coil winding part or the coil bobbin. It is also preferable that a second coil bobbin having a split structure is fitted externally and a secondary coil can be wound around the second coil bobbin.

Specifically, the coil bobbin and the second coil bobbin form an engaging portion that engages with the concave and convex portions at the joint end portion, and the divided bobbin members can be joined by being reversed by 180 degrees with each other in the same shape. (Claim 5).

In addition, the coil winding part, the coil bobbin, or the second coil bobbin has a body section that is square or circular in cross section (Claim 6).

Further, it is preferable that mounting portions for engaging a metal support base are respectively formed in parallel and oppositely on both outer side surfaces of both ends not corresponding to the leg portions of the frame (Claim 7).

The present invention also uses the coil bobbin / winding iron core holder for the transformer described above, holds the wound iron core in the iron core holding portion of the frame, and forms the coil winding portion or the leg formed in a portion corresponding to the leg iron portion. A transformer is provided in which a primary coil is wound around a coil bobbin attached to a portion corresponding to an iron part, and a secondary coil is wound around a second coil bobbin attached outside the primary coil. 8).

Here, the metal support base is composed of a plurality of pairs of fastening screws and nuts for connecting the pair of side frames and the both side frames, and the inner peripheral edge of the side frame at each end of the frame body. It is more preferable that the both side frames are connected by fastening screws and nuts while being engaged with the mounting portion.

The coil bobbin and wound iron core holder for a transformer according to the first aspect of the present invention as described above has an inner iron type structure and can be used in a state where the wound iron core is in an annealed state and is an uncut wound core type and electric wire winding type transformer. A coil bobbin / winding iron core holder used for manufacturing a magnetic steel strip wound in a ring shape a predetermined number of times, and having a pair of parallel straight leg portions sandwiching a central opening At least a frame made of a synthetic resin that holds an iron core, and the frame body is composed of a pair of divided frame bodies that are divided into two along the surfaces of the both leg iron portions, and the divided frame body has an opening of the wound iron core. Two parts that are located on the inner peripheral part and end face part of the part, and that are divided into two parts on the surface along the leg iron part at the part corresponding to the leg iron part. The coil winding part of the split structure is formed integrally or along the leg part A coil bobbin having a halved structure divided into two on the surface can be fitted externally, and an iron core holding part for holding the wound iron core at both regulating parts by connecting both divided frame bodies with an engaging part formed at the joint end part. In addition to forming, a coil winding part is formed so as to cover the leg iron part at a portion corresponding to the leg iron part, or a coil bobbin is attached so that an electric wire can be wound. It can be held accurately in position, and can be easily and reliably held in the core holding portion while the uncut winding core is annealed, and the wire wound around the coil winding portion or coil bobbin can be wound. While maintaining the electrical insulation state which does not contact an iron core, a coil can be protected from damage.

According to claim 2, the frame body is divided at the center in the axial direction of the wound iron core, and a first engaging portion is formed on one side with respect to the center line at the joining end portion of the pair of divided frame bodies. The second engagement portion that can engage the first engagement portion is formed on the other side, and both the divided frame bodies have the same shape and are 180-degree rotationally symmetrical with each other. It can be configured and provided at low cost.

According to claim 3, the restriction portion of the divided frame body includes a standing wall portion corresponding to the entire inner peripheral portion of the opening portion of the wound core and a substrate corresponding to the entire periphery of one end surface portion in the axial direction of the wound core. Therefore, in a state where the pair of divided frame bodies are joined, at least the inner peripheral portion and both end face portions of the wound iron core are covered and received by the both restricting portions, and the core holding portion having an annular groove shape is formed.

According to claim 4, on the outer periphery of the coil winding part or the coil bobbin, the surface along the leg iron part so as to cover the primary coil wound around the coil winding part or the coil bobbin. Since the second coil bobbin having a split structure divided into two parts is externally fitted and the secondary coil can be wound around the second coil bobbin, the primary coil and the secondary coil are completely electrically insulated. be able to.

According to claim 5, the coil bobbin and the second coil bobbin form an engaging portion that engages with the concave and convex portions at the joint end portion, and the respective divided bobbin members can be joined by being inverted by 180 degrees with each other. Therefore, it can be configured with a small number of parts and types, and can be provided at low cost.

According to the sixth aspect, the coil winding section, the coil bobbin, or the second coil bobbin has a square or circular cross-sectional outer shape. The coil bobbin can be stably mounted without rotating, and when it is circular, the electric wire can be wound while rotating the coil bobbin and the second coil bobbin with respect to the frame body, and the coil winding work is easy. Become.

According to the seventh aspect of the present invention, the mounting portions that engage the metal support bases are formed in parallel on both outer sides of both ends that do not correspond to the leg portions of the frame, so that the frame is supported. The work of attaching to the table becomes simple and the support strength is high.

A transformer according to an eighth aspect of the present invention is a coil formed in a portion corresponding to the leg iron portion while holding the wound core in the iron core holding portion of the frame body using the above-described coil bobbin and wound iron core holder for the transformer. Since the primary coil is wound around the coil bobbin attached to the winding part or the portion corresponding to the leg iron part, and the secondary coil is wound around the second coil bobbin attached outside the primary coil, the wound iron core and coil are It can be held accurately in a predetermined position, and can be easily and reliably held in the iron core holding part in a state where the magnetic characteristics of the uncut wound iron core can be fully exhibited while being annealed. While maintaining the electrical insulation state which does not contact a wound iron core, a coil can be protected from damage.

According to the ninth aspect of the present invention, the metal support base includes a plurality of pairs of fastening screws and nuts for connecting the pair of side frames and the both side frames, and the inner ends of the side frames at each end of the frame body. The peripheral part is engaged with the mounting part, and both side frames are connected with fastening screws and nuts. Therefore, the frame body is reinforced by the support base to improve the strength and durability, and the support base is attached to the installation surface. It can be used and installed, and installation is easy.

It is a whole perspective view which shows the coil bobbin and wound iron core holder (1st invention product) for transformers of 1st Embodiment. It is a side view of the 1st invention product. It is a disassembled perspective view of a 1st invention product. It is a cross-sectional view of the first invention product. It is a longitudinal cross-sectional view of the 1st invention product. It is a disassembled perspective view which shows the procedure which mounts | wears with a wound iron core to the 1st invention. It is a top view which shows the transformer which hold | maintained the wound iron core to the 1st invention goods, and was manufactured by winding a coil. FIG. 8 is a sectional view taken along line X1-X1 of FIG. FIG. 8 is a cross-sectional view taken along line Y1-Y1 of FIG. It is a perspective view which shows the state which mounted | wore the support base in the transformer using the 1st invention. It is a top view of the transformer similarly equipped with the support stand. It is an exploded perspective view of a transformer and a support stand similarly. It is a whole perspective view which shows the modification of the coil bobbin and winding iron core holder for transformers of 1st Embodiment. It is a longitudinal cross-sectional view similarly. It is a whole perspective view which shows the coil bobbin and wound iron core holder (2nd invention) for transformers of 2nd Embodiment. It is a side view of the 2nd invention. It is a disassembled perspective view of the 2nd invention. It is a cross-sectional view of the second invention product. It is a longitudinal cross-sectional view of a 2nd invention product. It is a disassembled perspective view which shows the procedure of mounting | wearing a wound iron core to 2nd invention goods. It is a top view which shows the transformer which hold | maintained the wound iron core in the 2nd invention goods, and was manufactured by winding a coil. FIG. 22 is a sectional view taken along line X2-X2 of FIG. FIG. 22 is a sectional view taken along line Y2-Y2 of FIG. It is a whole perspective view which shows the coil bobbin and wound iron core holder (3rd invention product) for transformers of 3rd Embodiment. It is a side view of 3rd invention goods. It is a disassembled perspective view of 3rd invention goods. It is a cross-sectional view of the third invention product. It is a longitudinal cross-sectional view of the third invention product. It is a disassembled perspective view which shows the procedure of mounting | wearing a wound iron core to 3rd invention goods. It is a top view which shows the transformer which hold | maintained the wound iron core in the 3rd invention goods, and was manufactured by winding a coil. FIG. 31 is a cross-sectional view taken along line X3-X3 of FIG. FIG. 31 is a sectional view taken along line Y3-Y3 of FIG.

Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIGS. 1 to 6 show a coil bobbin / winding iron core holder for a transformer according to a first embodiment of the present invention, and FIGS. 7 to 9 show a coil holding a winding iron core in the coil bobbin / winding iron core holder for a transformer according to the first embodiment. FIG. 10 to FIG. 12 show a state in which a support base is mounted on the transformer A of the first embodiment. 13 and 14 show a modification of the first embodiment. FIGS. 15 to 20 show a transformer coil bobbin and wound core holder according to the second embodiment of the present invention, and FIGS. 21 to 23 show the transformer core bobbin and wound core holder according to the second embodiment. 1 shows a transformer B manufactured by winding a coil. FIGS. 24 to 29 show a transformer coil bobbin and wound core holder according to a third embodiment of the present invention, and FIGS. 30 to 32 show a transformer core bobbin and wound core holder according to the third embodiment. 1 shows a transformer C manufactured by winding a coil. In the figure, reference numeral 1 denotes a frame body, 2 denotes an iron core holding portion, 3 denotes a coil winding portion, 4 denotes a second coil bobbin, 5 denotes a winding iron core, 6 denotes a coil, and 7 denotes a support base.

As shown in FIGS. 1 to 9, the transformer coil bobbin and wound core holder according to the first embodiment of the present invention has an inner iron type structure and can be used in a state where the wound core 5 is annealed. A coil bobbin and wound core holder used to manufacture a transformer of a type and a wire winding method, wherein a magnetic steel strip wound in a ring shape a predetermined number of times is annealed, and a pair of parallel wires sandwiching an opening at the center At least a synthetic resin frame body 1 that holds a wound iron core 5 having straight leg portions 8 and 8 is provided, and the frame body 1 is divided into a pair of surfaces along the both leg portions 8 and 8. The divided frame bodies 1A and 1B are composed of the divided frame bodies 1A and 1B. The restriction frame 10 is positioned on the inner peripheral portion 5A and the end surface portion 5B of the opening 9 of the wound iron core 5 and stops the wound iron core 5. And a surface along the leg portion 8 at a portion corresponding to the leg portion 8. The coil winding part 3 of the two-part split structure is integrally formed, and both the divided frame bodies 1A and 1B are connected by the engaging part 11 formed at the joining end part thereof, and both the restricting parts 10 and 10 are connected. The core holding part 2 for holding the wound iron core 5 is formed, and the coil winding part 3 is formed so as to cover the leg iron part 8 at a portion corresponding to the leg iron part 8 so that the electric wire can be wound. It will be.

More specifically, as shown in FIG. 3, the frame 1 is divided at the center in the axial direction of the wound iron core 5, that is, at the center in the thickness direction of the end surface portion 5 </ b> B, and a pair of divisions. A first engaging portion 11A is formed on one side with respect to the center line at the joining end portions of the frame bodies 1A and 1B, and a second engaging portion 11B capable of engaging the first engaging portion 11A is provided on the other side. The two divided frames 1A and 1B are formed in the same shape and can be joined to each other by being inverted 180 degrees. Therefore, the divided frame bodies 1A and 1B can be easily managed by molding a large number of one type with a synthetic resin and taking out two of them to form a pair.

Further, the restricting portions 10 of the divided frame bodies 1A and 1B include the standing wall portion 12 corresponding to the entire inner peripheral portion 5A of the opening 9 of the wound iron core 5 and the entire end surface portion 5B in the axial direction of the wound iron core 5. It forms with the board | substrate part 13 corresponding to the periphery. Thereby, when a pair of division | segmentation frame bodies 1A and 1B are joined by the junction part 1, the annular ditch | groove received in the state which covered the inner peripheral part 5A and both end surface parts 5B and 5B of the wound core 5 with the both control parts 10 and 10 at least. A shaped iron core holding portion 2 is formed. The iron core holding part 2 is a concave groove having a substantially U-shaped cross section that opens to the outer peripheral side, but the divided winding parts 3A and 3B of the coil winding part 3 formed at a position corresponding to the leg iron part 8. Thus, the outer side of the groove is closed. Each of the divided frame bodies 1A and 1B is formed with divided winding portions 3A and 3B on the left and right sides, respectively, and the divided winding portions 3A and 3B are inverted by 180 degrees and joined by a concave and convex fitting structure to be coiled winding portions. 3 is configured. The divided winding portions 3A and 3B have a substantially U-shaped cross section, the bottom surface portion 14 is constituted by the substrate portion 13, the inner wall surface portion 15 is constituted by the standing wall portion 12 of the restriction portion 10, and the outer wall surface portion 16 is formed. Is formed so as to rise in parallel with the standing wall portion 12 from the outer edge of the substrate portion 13. In addition, flange portions 17 and 17 are provided around both ends of each of the divided winding portions 3A and 3B, and a spacer 18 is formed in a step shape at an inner corner portion of the flange portion 17 so that a second coil bobbin 4 described later is formed. Can be held at a predetermined position.

And it is the outer periphery of the coil winding part 3, and is divided into two on the surface along the leg iron part 8 so as to cover the primary coil 6A wound around the coil winding part 3 A second coil bobbin 4 having a split structure is externally fitted, and a secondary coil 6B can be wound around the second coil bobbin 4. Here, the second coil bobbin 4 forms an engaging portion 19 that engages with the joint end portion, and the divided bobbin members 4A and 4B have the same shape and can be joined by reversing each other by 180 degrees. Yes. That is, the divided bobbin members 4A and 4B have a shape in which the flange portion 21 is provided around both ends of the body portion 20 having a substantially U-shaped cross section, and the first engagement portion 19A is formed on one side edge and the other side. A second engagement portion 19B that can engage the first engagement portion 19A is formed at the edge. Two second coil bobbins 4 and 4 are configured using four divided bobbin members 4A and 4B having the same shape. In the present embodiment, the second coil bobbin 4 has a square cross-sectional outer shape formed by the body portions 20 and 20.

Further, mounting portions 22 and 22 for engaging the metal support 7 are formed in parallel and oppositely on both outer sides of both ends not corresponding to the leg portions 8 of the frame 1. The attachment portion 22 has a structure in which an engagement groove 24 is formed along the plate thickness portion on the distal end side of the plate-like portion 23 protruding from the outer surface of the substrate portion 13. Here, in order to increase the strength of the mounting portion 22, it is desirable to form a plurality of continuous ribs from the substrate portion 13 on both sides or one side of the plate-like portion 23 at a predetermined interval. The presence or absence and its structure are not particularly limited.

In order to configure the transformer A using the transformer coil bobbin / winding iron core holder composed of the frame 1 and the two second coil bobbins 4 and 4, as shown in FIGS. The split frame bodies 1A and 1B are joined and integrated with each other at the joint portion 11 while sandwiching the wound core 5 between the restriction portions 10 and 10, and the wound core 5 is attached to the core holding portion 2 of the frame body 1. Hold. Then, the primary coil 6A is wound by winding an electric wire between the spacers 18 and 18 of the coil winding portions 3 and 3 formed at a portion corresponding to the leg portion 8. At this time, the primary coil 6 </ b> A is wound so as not to protrude from the spacer 18. Here, since the site | part corresponding to the said leg iron part 8 is completely covered with the coil winding parts 3 and 3, the said wound iron core 5 and the primary coil 6A will be in an electrically insulated state. Then, the split split bobbin members 4A and 4B are fitted outside the primary coil 6A and between the flange portions 17 and 17 of the coil winding portions 3, and are joined and integrated with each other at the joint portion 19. The second coil bobbin 4 is configured, and the inner peripheral portion is supported by the spacers 18, 18. In this state, an electric wire is wound around the second coil bobbin 4 to wind the secondary coil 6 </ b> B. The primary coil 6A and the secondary coil 6B are electrically insulated by the body portion 20 of the second coil bobbin 4 existing therebetween. In addition, the edge part of each electric wire is suitably pulled out from the grooves 25 and 26 formed in the flange part 17 of the coil winding part 3 and the flange part 21 of the second coil bobbin 4. Furthermore, if the said frame 1 is hold | maintained with the metal support stand 7, the transformer A will be easy to handle and intensity | strength will improve.

Here, as shown in FIGS. 10 to 12, the metal support table 7 includes a plurality of pairs of fastening screws 28,..., Nuts 29, which couple the pair of side frames 27, 27 and the side frames 27, 27 together. .., And at each end of the frame body 1, the inner peripheral edge of the side frame 27 is engaged with the mounting portion 22, and both side frames 27, 27 are fastened with fastening screws 28,..., Nuts 29,. Connect with Each of the side frames 27 includes a side-view U-shaped main body frame 30 and an angle-shaped connecting frame 31 which are manufactured by sheet metal processing from a metal plate. The main body frame 30 has an opening 33 opened to one side in a vertical substrate 32, and the engagement grooves of the upper and lower mounting portions 22, 22 of the frame body 1 are formed in the substrate 32 corresponding to the upper and lower portions of the opening 33. An upper plate portion 32A and a lower plate portion 32B that are slidably engaged with 24, 24 are provided, and the lower edge of the substrate 32 is bent outward to form the mounting plate 34, and the upper edge is bent outward. Reinforcing plates 36 are formed by bending the upper surface plate 35 and side edges inward, and through holes 37 are formed in the four corners of the substrate 32, and the transformer A is provided in the mounting plate 34. Mounting holes 38 and 38 for screwing are formed at the installation location. The connection frame 31 includes a connection plate 39 disposed across the outer surface of the upper plate portion 32A and the lower plate portion 32B corresponding to the open end of the opening 33 of the main body frame 30, and one side edge of the connection plate 39. Are formed inwardly, and through holes 41 are formed in the upper and lower ends of the connecting plate 39.

In the present embodiment, the side frames 27 and 27 are configured by using the two connecting frames 31 and 31 that are the same shape members as the two main body frames 30 and 30 that are the same shape members. That is, the main body frame 30 and the connecting frame 31 are paired to form the side frame 27, and the opposite side frame 27 is configured by reversing the main body frame 30 and the connecting frame 31 by 180 degrees. Specifically, as shown in FIG. 12, the upper plate portion 32A of the main body frame 30 is connected to the engagement grooves 24, 24 of the upper and lower mounting portions 22, 22 on one side of the frame body 1, for example, from the left side. While slidingly engaging the lower plate portion 32B, the upper plate portion 32A and the lower plate portion 32A of the main body frame 30 are connected to the engaging grooves 24, 24 of the upper and lower mounting portions 22, 22 on the other side of the frame 1 from the left and right other sides, for example, the right side. The plate portion 32B is slidably engaged. Then, the connection plate 39 of the connection frame 31 is brought into contact with the outer side surfaces of the upper plate portion 32A and the lower plate portion 32B of each main body frame 30 so that the reinforcing plate 40 faces inward, and the fastening screws 28 are placed on both sides. When the nut 29 is screwed and tightened to the end of the fastening screw 28 through the through holes 37 and 37 of the main body frames 30 and 30 and the through hole 41 of the connecting frame 31, the state shown in FIG. 10 and 12, illustration of the wound core 5 and the coil 6 is omitted. Finally, it is desirable that the transformer A is immersed in glue and dried to improve the insulation performance, and the gap between each part is filled to completely eliminate the play.

The frame 1 can be made of various materials such as general-purpose polypropylene (PP), acrylonitrile / butadiene / styrene resin (ABS resin) as long as it is a synthetic resin, and an electrically insulating thermally conductive filler for the base resin. It is also preferable to mold with an electrically insulating and thermally conductive resin composition filled with. If a material having a high thermal conductivity is used as the material of the frame body 1, the Joule heat generated from the coil 6 is quickly transmitted, and the winding in contact with the frame body 1 from the whole of the frame body 1. It is possible to dissipate heat from the iron core 5 to suppress the temperature rise and further increase the electrical resistance.

The wound core 5 used in the present invention is not particularly limited, but an amorphous magnetic steel strip or a directional electromagnetic steel strip is wound into a ring shape a predetermined number of times and used without cutting. For example, as a material of an amorphous wound iron core, Metglas, Inc. A ribbon-shaped amorphous alloy (METGLAS 2605TCA = 2605SA1) made of 0.025 mm thick, or a ribbon-shaped alloy (Finemet FT-3) made of fine crystal grains about 0.02 mm thick made by Hitachi Metals, Ltd. Is mentioned. Here, “METGLAS” refers to Metglas, Inc. "Finemet" is a registered trademark of Hitachi Metals, Ltd.

Further, the electric wire of the coil 6 used in the present invention is not particularly limited, but a high frequency transformer having a large surface area with excellent high frequency characteristics is used. For example, a litz wire covered with an insulating layer or a flat wire covered with an insulating layer is used. Since both are sufficiently flexible, the coil winding portion 3 and the second coil bobbin are used. 4 can be involved. An automatic winding machine is used for winding the electric wire around the coil winding portion 3 and the second coil bobbin 4, but manual winding is possible as long as the number of windings is relatively small.

FIGS. 13 and 14 show a modification of the first embodiment. In this modification, the second coil bobbin 4 is not used. Therefore, the spacers 18 and 18 in the coil winding portion 3 of the frame 1 are shown in FIGS. Does not form. In order to wind the primary coil 6A and the secondary coil 6B around the coil winding part 3, first, the primary coil 6A is wound around the coil winding part 3, and then an insulating sheet is wound around the coil 6A. Insulation is secured, and the secondary coil 6B is wound thereon. In addition, although the attachment part 22 for hold | maintaining with the said support stand 7 is abbreviate | omitted in the frame 1 shown in FIG.13 and FIG.14, it shall provide suitably. Since other configurations are the same as those described above, the same components are denoted by the same reference numerals, and description thereof is omitted.

Next, the transformer coil bobbin / winding iron core holder and transformer B according to the second embodiment will be described with reference to FIGS. Although the present embodiment is similar in appearance to the first embodiment described above when FIG. 1 is compared with FIG. 15, the transformer coil bobbin / winding core holder of the second embodiment is similar to the first embodiment described above. The coil winding part 3 is a coil bobbin 42 made of a separate member, and the coil bobbin 42 is also a half structure divided into two parts along the leg iron part 8. The coil bobbin 42 can be fitted onto a portion of the frame 101 corresponding to the leg iron portion 8, and the second coil bobbin 4 can be mounted on the outside of the coil bobbin 42 in the same manner as described above. In the state where the coil bobbin 42 is mounted on the frame body 101, the outer shape of the coil winding part 3 is the same. The same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described. In the present embodiment, the attachment portion 22 for holding the frame body 101 on the support base 7 is omitted.

As shown in FIGS. 17 and 20, the frame body 101 of the present embodiment is divided at the center in the axial direction of the wound core 5, that is, at the center in the thickness direction of the end surface portion 5B, and a pair of divided frame bodies 101A, The first engaging portion 11A is formed on one side with respect to the center line at the joint end portion of 101B, and the second engaging portion 11B capable of engaging the first engaging portion 11A is formed on the other side. The divided frames 101A and 101B have the same shape and can be joined to each other by being inverted 180 degrees. Each of the divided frame bodies 101A and 101B is not provided with the divided winding portions 3A and 3B at the portion corresponding to the leg portion 8 of the substrate portion 13, and the coil bobbin 42 on the outer surface of the substrate portion 13. Recessed step portions 43, 43 for positioning are formed. Moreover, the said coil bobbin 42 is the half structure divided into two by the surface along the said leg iron part 8 similarly to the said 2nd coil bobbin 4, and can wind the primary coil 6A. Here, the coil bobbin 42 forms an engaging portion 44 that engages with the joint end portion, and the divided bobbin members 42A and 42B have the same shape and can be joined to each other by being inverted by 180 degrees. That is, the divided bobbin members 42A and 42B have a shape in which the flange portions 46 are provided around both ends of the body portion 45 having a substantially U-shaped cross section, and the first engaging portion 44A is formed on one side edge, and the other side A second engagement portion 44B that can engage the first engagement portion 44A is formed at the edge. Two coil bobbins 42 and 42 are constituted using four divided bobbin members 42A and 42B having the same shape. In the present embodiment, the coil bobbin 42 has a square cross-sectional outer shape formed by the body portions 45 and 45. A spacer 47 is formed in a step shape at the inner corner of the flange 46 so that the second coil bobbin 4 can be held at a predetermined position. Further, grooves 48, 48 are provided in the flange portion 46 so that the end portion of the electric wire of the primary coil 6A can be pulled out as appropriate. Since other configurations are the same as those described above, the same components are denoted by the same reference numerals, and description thereof is omitted.

In order to construct the transformer B using the transformer coil bobbin and wound iron core holder composed of the frame body 101, the two coil bobbins 42 and 42, and the second coil bobbins 4 and 4, FIG. As shown in FIG. 3, the split frame bodies 101A and 101B are joined and integrated with each other at the joint portion 11 while the wound core 5 is sandwiched between the restriction portions 10 and 10, and the core core of the frame body 101 is held. The wound core 5 is held in the part 2. Then, the split bobbin members 42A and 42B divided into two parts are externally fitted to the portions corresponding to the leg portions 8, and the coil bobbin 42 is configured by being joined and integrated with each other at the joint 44. Then, an electric wire is wound between the spacers 47 and 47 of the coil bobbins 42 and 42 to wind the primary coil 6A. At this time, the primary coil 6A is wound so as not to protrude from the spacer 47. Here, since the site | part corresponding to the said leg iron part 8 is completely covered with the coil bobbins 42 and 42, the said wound iron core 5 and the primary coil 6A will be in an electrical insulation state. Then, the split bobbin members 4A and 4B divided into two parts are fitted outside the primary coil 6A and between the flange portions 46 and 46 of the coil bobbins 42, and are joined and integrated with each other at the joint portion 19. The coil bobbin 4 is configured, and the inner peripheral portion is supported by the spacers 47, 47. In this state, an electric wire is wound around the second coil bobbin 4 to wind the secondary coil 6B. The primary coil 6A and the secondary coil 6B are electrically insulated by the body portion 20 of the second coil bobbin 4 existing therebetween.

Finally, the transformer coil bobbin / winding iron core holder and transformer C according to the third embodiment will be described with reference to FIGS. In the present embodiment, the basic configuration is the same as that of the second embodiment described above, and most of the configuration is the same as that of the first embodiment. Omitted and the description will focus on different configurations. In the present embodiment, a frame body 201 similar to the frame body 101, and a coil bobbin 49 and a second coil bobbin 50 corresponding to the coil bobbin 42 and the second coil bobbin 4 are used.

As shown in FIGS. 26 and 29, the frame body 201 of the present embodiment is divided at the center in the axial direction of the wound core 5, that is, at the center in the thickness direction of the end surface portion 5B, and a pair of divided frame bodies 201A, The first engaging portion 11A is formed on one side with respect to the center line at the joining end portion of 201B, and the second engaging portion 11B capable of engaging the first engaging portion 11A is formed on the other side. The divided frame bodies 201A and 201B have the same shape and can be joined to each other by being inverted 180 degrees. Each of the divided frame bodies 201A and 201B is provided with the coil bobbin 49 on the outer surface of the substrate portion 13 without providing the divided winding portions 3A and 3B at the portion corresponding to the leg portion 8 of the substrate portion 13. Recessed step portions 51, 51 for positioning are formed. In the present embodiment, the coil bobbin 49 and the second coil bobbin 50 are circular in cross-sectional shape, and the part corresponding to the leg portion 8 of the frame 201 can be externally fitted to the coil bobbin 49 so as to be rotatable. As described above, the surface of the concave step portion 51 is an arc surface, and a plurality of ribs are projected inward to form the arc-shaped support surface 52 continuously with the concave step portion 51. In a state in which the two divided frame bodies 201A and 201B are joined and integrated at the joining portion 11, the cylindrical inner surface of the coil bobbin 49 is formed by the recessed step portions 51 and 51 and the arcuate support surfaces 52 and 52 as shown in FIG. It is supported so that it can rotate in surface contact.

Similar to the second coil bobbin 4, the coil bobbin 49 and the second coil bobbin 50 have a halved structure that is divided into two parts along the leg iron portion 8, and each of the primary coil 6A and the secondary coil 6B. Winding is possible. Here, the coil bobbin 49 forms an engaging portion 53 that engages with the joint end portion, and the divided bobbin members 49A and 49B have the same shape and can be joined to each other by being inverted by 180 degrees. In other words, the divided bobbin members 49A and 49B have a shape in which the flange portions 55 are provided around both ends of the barrel portion 54 having a semi-cylindrical cross section, and the first engagement portion 53A is formed on one side edge and the other side. A second engagement portion 53B that can engage the first engagement portion 53A is formed at the edge. Two coil bobbins 49 and 49 are constituted by using four divided bobbin members 49A and 49B having the same shape. In the present embodiment, the coil bobbin 49 has a circular cross-sectional outer shape formed by the body portions 54 and 54. In addition, a spacer 56 is formed in a step shape at the inner corner portion of the flange portion 55 so that the second coil bobbin 50 can be held at a predetermined position.

On the other hand, the second coil bobbin 50 forms an engaging portion 57 that engages with the joint end portion, and the divided bobbin members 50A and 50B have the same shape and can be joined to each other by being inverted by 180 degrees. . That is, the divided bobbin members 50A and 50B have a shape in which the flange portions 59 are provided around both ends of the barrel portion 58 having a semi-cylindrical cross section, and the first engagement portion 57A is formed on one side edge, and the other side A second engagement portion 57B that can engage the first engagement portion 57A is formed at the edge. Two second coil bobbins 50 and 50 are configured using four divided bobbin members 50A and 50B having the same shape. In the present embodiment, the second coil bobbin 50 has a circular cross-sectional outer shape formed by the body portions 58 and 58.

In order to construct the transformer C using the transformer coil bobbin / winding iron core holder composed of the frame body 201, the two coil bobbins 49, 49 and the two second coil bobbins 50, 50, FIG. 29 to FIG. As shown in FIG. 2, the split frame bodies 201A and 201B are joined and integrated with each other at the joint portion 11 while the winding core 5 is sandwiched between the restriction portions 10 and 10, and the iron core holding of the frame body 101 is held. The wound core 5 is held in the part 2. Then, the split bobbin members 49 </ b> A and 49 </ b> B are externally fitted to the portions corresponding to the leg iron portions 8, and are joined and integrated with each other at the joint portion 53 to form the coil bobbin 49. Then, an electric wire is wound between the spacers 56 and 56 of the coil bobbins 49 and 49 to wind the primary coil 6A. Here, there are two methods for winding the electric wire around the coil bobbin 49: a method in which the coil bobbin 49 is rotated with respect to the frame 201 and a method in which the coil bobbin 49 is fixed and an automatic winding device or a manual winding method. But it ’s okay. At this time, the primary coil 6 </ b> A is wound so as not to protrude from the spacer 56. Since the part corresponding to the leg iron part 8 is completely covered with the coil bobbins 49, 49, the wound core 5 and the primary coil 6A are in an electrically insulated state. Then, the split bobbin members 50A, 50B divided by two are provided outside the primary coil 6A and between the flange portions 55, 55 of each coil bobbin 49, and are joined and integrated with each other at the joint portion 57. The coil bobbin 50 is configured, and the inner peripheral portion is supported by the spacers 56, 56. In this state, an electric wire is wound around the second coil bobbin 50 to wind the secondary coil 6B. Here, the work of winding the electric wire around the coil bobbin 50 includes a method of rotating the coil bobbin 50 together with the coil bobbin 49 with respect to the frame body 201 and a method of winding the coil bobbin 50 with the coil bobbin 50 fixed or an automatic winding method. Any of these may be used.
The primary coil 6A and the secondary coil 6B are electrically insulated by the body portion 58 of the second coil bobbin 50 existing between them.

A, B, C transformer,
1 frame, 1A, 1B divided frame,
101 frame, 101A, 101B divided frame,
201 frame, 201A, 201B divided frame,
2 Iron core holding part,
3 coil winding part, 3A, 3B split winding part,
4 second coil bobbin, 4A, 4B divided bobbin member,
5 roll iron core,
5A inner circumference, 5B end face,
6 coils,
6A primary coil, 6B secondary coil,
7 support bases, 8 legs,
9 opening, 10 regulating part,
11 engaging portion,
11A 1st engaging part, 11B 2nd engaging part,
12 standing wall, 13 substrate,
14 bottom part, 15 inner wall part,
16 outer wall surface portion, 17 flange portion,
18 spacer,
19 engaging portion,
19A 1st engaging part, 19B 2nd engaging part,
20 trunks, 21 flanges,
23 plate-like part, 24 engagement groove,
25 grooves, 26 grooves,
27 side frame, 28 fastening screw,
29 nut, 30 body frame,
31 connecting frame, 32 substrate,
32A upper plate part, 32B lower plate part,
33 opening, 34 mounting plate,
35 top plate, 36 reinforcing plate,
37 through holes, 38 mounting holes,
39 connecting plate, 40 reinforcing plate,
41 through holes,
42 coil bobbins, 42A, 42B split bobbin members,
43 concave step,
44 engaging portion,
44A 1st engaging part, 44B 2nd engaging part,
45 body, 46 flange,
47 spacers, 48 grooves,
49 coil bobbins, 49A, 49B split bobbin members,
50 second coil bobbin, 50A, 50B split bobbin member,
51 concave step, 52 arcuate support surface,
53 engaging portion,
53A first engaging portion, 53B second engaging portion,
54 trunk, 55 flange,
56 spacer,
57 engaging portion,
57A first engaging portion, 57B second engaging portion,
58 trunk, 59 flange.

Claims (9)

1. A coil bobbin and wound core holder used for manufacturing an uncut wound core type and electric wire winding type transformer that can be used in the state after annealing the wound core with an inner iron structure,
   A magnetic steel strip wound in a ring shape a predetermined number of times is annealed, and includes at least a synthetic resin frame that holds a wound iron core having a pair of parallel straight leg portions sandwiching a central opening, The frame body is composed of a pair of divided frame bodies that are divided into two along the surfaces of the both leg iron portions. The divided frame body is positioned on the inner peripheral portion and the end surface portion of the opening of the wound iron core. And a coil winding portion having a split structure that is divided into two parts along the surface of the leg iron portion at a portion corresponding to the leg iron portion, or A coil bobbin having a halved structure divided into two on the surface along the leg portion can be externally fitted, and both divided frame bodies are connected by an engaging portion formed at the joint end portion, and the wound core is formed by both restricting portions. And a coil winding portion so as to cover the leg iron portion at a portion corresponding to the leg iron portion. Form or modified dexterity bobbin Kenmaki core holder the coil bobbin by mounting characterized by comprising as a possible involvement of wire.
2. The frame body is divided at the center in the axial direction of the wound iron core, and a first engagement portion is formed on one side with respect to the center line at the joint end of the pair of divided frame bodies, and the first is formed on the other side. 2. The transformer coil bobbin / winding core holder according to claim 1, wherein a second engaging portion that can engage with the engaging portion is formed, and both divided frame bodies have the same shape and can be joined to each other by being inverted by 180 degrees.
3. The restriction portion of the divided frame body includes a standing wall portion corresponding to the entire inner peripheral portion of the opening portion of the wound core and a substrate portion corresponding to the entire periphery of one end surface portion in the axial direction of the wound core. Or the coil bobbin and winding iron core holder for transformers of 2 description.
4. The outer periphery of the coil winding part or the coil bobbin, which is divided into two parts on the surface along the leg iron part so as to cover the primary coil wound around the coil winding part or the coil bobbin The transformer coil bobbin / winding core holder according to any one of claims 1 to 3, wherein a second coil bobbin having a structure is externally fitted and a secondary coil can be wound around the second coil bobbin.
5. 5. The coil bobbin and the second coil bobbin form an engaging portion that engages with a concave and convex portion at a joint end portion, and the respective divided bobbin members have the same shape and can be joined to each other by being inverted by 180 degrees. Coil bobbin and wound iron core holder for transformers.
6. 6. The coil bobbin / winding iron core holder for a transformer according to claim 5, wherein the coil winding part or the coil bobbin or the second coil bobbin has a square or circular cross-sectional outer shape.
7. The transformation according to any one of claims 1 to 6, wherein mounting portions for engaging a metal support stand are formed in parallel and oppositely on both outer sides of both ends not corresponding to the leg portions of the frame. Cage bobbin and wound iron core holder.
8. A coil winding formed in a portion corresponding to the leg iron portion while holding the wound core in the iron core holding portion of the frame using the transformer coil bobbin and wound iron core holder according to any one of claims 1 to 7. A transformer, wherein a primary coil is wound around a coil bobbin attached to a turning part or a portion corresponding to the leg iron part, and a secondary coil is wound around a second coil bobbin attached outside the primary coil.
9. The metal support is composed of a plurality of pairs of fastening screws and nuts for connecting a pair of side frames and both side frames, and the inner peripheral edge of the side frame is used as the mounting portion at each end of the frame. The transformer according to claim 8, wherein the transformer is engaged, and both side frames are connected by fastening screws and nuts.

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