JPH07130560A - Choke coil for large current, box type noise filter using thereof and yoke coil winding - Google Patents

Abstract

PURPOSE:To form a cylindrical winding whose thickness on the side of inside diameter of winding is not large by a method wherein an inductor main body is fixed to an insulating base, a spectacle type insulating partition plate is inserted into a long and narrow recessed part, a spectacle-shaped winding is inserted into a circular recessed part, and a UV type core is installed. CONSTITUTION:A choke coil 1 is placed on an insulated base 2, and the choke coil 1 is fixed to the insulated base 2 using two U-shaped core-fixing fitting 3a. The above- mentioned choke coil 1 is formed by arranging three spectacle-shaped windings 7 in the same winding direction, and a UV-type core 8 is combined with two spectacle- shaped windings. The spectacle-shaped insulating partition plate 9, which is placed on the insulated base 2, is fittingly provided on the long and narrow recessed part 21 of the insulated base 2 and the lower part of the spectacle-shaped winding is fittingly provided on the circular recessed part 22 of the insulated base stand 2. Two U-shaped core fixing fittings 3a are fitted to the stepped part 23 of the insulated base 2, it is brought into contact with the base part 82 of the UV-type core 8 and screwed into the screwed hole 24 of the stepped part 23 through the U-shaped core fixing fitting 3a and the hole 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-current choke coil in which a box-shaped winding using a rectangular wire and a UU core of a split type closed magnetic circuit are combined, and a large-current choke coil in a box-shaped metal container. The present invention relates to a box-shaped noise filter for a large current housed therein, and a large-current choke coil winding that constitutes a large-current choke coil.

[0002]

2. Description of the Related Art In a conventional large current choke coil, a thick electric wire having a circular cross section with a large diameter is manually wound directly around a closed magnetic circuit core such as a toroidal core or the wire cross section is wound around a winding frame made of an electrically insulating material. It is made by winding a circular wire or a rectangular wire with a rectangular cross section, and then assembling split type closed magnetic circuit cores such as UU core, UI core, EE core, EI core, etc. It was fixed in place by either using it or mounting it on a square base.

It is difficult to manually and densely wind a winding wire using a thick electric wire, and even when the winding material is used to tightly and closely wind the electric wire on the winding frame, a mechanically strong winding frame must be used. Since the winding size is large and the space factor of the winding is low, the conventional large current choke coil is large.

In order to reduce the size of the large current choke coil, it is preferable to use the eyeglass winding 7 shown in FIG. The spectacle-shaped winding 7 can be made by an automatic device, and by wrapping a rectangular electric wire vertically and winding it into a single layer in a cylindrical shape, the electric wire occupancy ratio is 70% compared to the lap winding of a thick electric wire with a circular cross-sectional shape. %
From the stand to the 90% stand, the winding direction of the two cylindrical windings 71, 72 in the continuous winding direction is rewound at the connecting end into a figure eight shape, and the same number of turns is used to wind the wire. When a current flows through the two windings, the magnetic fields created by the two windings strengthen each other to form a closed magnetic circuit, and the windings are made into a spectacle-shaped winding. The spectacle-shaped winding has features such as high magnetic coupling when a UU-shaped core is incorporated into two windings to form a choke coil.

A large current choke coil using the spectacle-shaped winding 7 has a structure conventionally shown in an exploded perspective view in FIG. The large current choke coil shown in FIG. 5 is a three-phase common mode choke coil for noise prevention, and has four eyeglass-shaped insulating partition plates 9 having two through holes corresponding to the central hole of the eyeglass-shaped winding 7. In between, the three eyeglass-shaped windings 7 are arranged in the same direction with the winding directions aligned in the same direction, and they are arranged concentrically with the eyeglass-shaped insulating partition plate 9 sandwiched therebetween, and the insulating cylinder 10 is provided in the communication hole of the central hole and the through hole.
And the magnetic legs of the UU-shaped core 8 are inserted from both sides of the insulating cylinder 10 and abutted against each other to form an inductor body, and the inductor body is placed in the central recess 26 formed in the rectangular shape of the rectangular base 2a. It was a structure.

The inductor body in which the spectacle-shaped winding 7 and the UU-shaped core 8 are combined is placed on the rectangular base 2a by inserting the lower portion of the spectacle-shaped insulating partition plate 9 into the central recess 26 of the rectangular base 2a. The lower free end of the U-shaped core fixing metal fitting 3a is fitted into the step portions 23 on both sides of the 2a, and the upper free end is brought into contact with the upper portion of the base portion 82 of the UU-shaped core 8 so that the U-shaped core fixing metal fitting 8 is attached to the step portion 23. The through hole 33 of the U-shaped core fixing metal fitting is aligned with the screw hole 24 of the central wall surface, and the UU-shaped core 8 is brought into a butted state by screwing, and at the same time, the inductor body is fixed to the rectangular base 2a.

The conventional box noise filter for large current is
A choke coil, in which a thick circular cross-section electric wire is manually wound around a toroidal core, is housed in a box-shaped metal container with external connection terminals on the opposite sidewalls, and the choke coil and external connection terminal are insulated or covered It was connected with a board. Since a choke coil that uses a toroidal coil by hand cannot be made efficiently, in a box noise filter that requires a choke coil with a large current capacity, split a rectangular wire and a UU-shaped core for mechanically winding a rectangular wire. A choke coil in which a closed magnetic circuit core was combined and fixed on a rectangular base was used.

Further, a conventional winding is formed by laminating flat rectangular electric wires in the thickness direction and winding them in a cylindrical shape with the width direction orthogonal to the thickness direction facing the center, as shown in FIG. ,square,
Alternatively, since it has a rectangular shape, when a cylindrical winding having a small radius of curvature is formed on the surface winding the widthwise surface,
The cross section of one half of the winding is shown in Fig. 1. Since the winding wound in a tubular shape is compressed in the direction from the winding inner diameter side 16a to the winding outer diameter side 16b, the winding inner diameter side 16a becomes thicker. And
When the winding is wound in a tubular shape, a gap 17 is formed between the winding outer diameter side 16b between the adjacent rectangular electric wires, but the increased thickness is closely contacted on the winding inner diameter side 16a. However, the increased thickness on the inner diameter side has a drawback that the width of the entire winding is increased because the increased thickness is laminated in the thickness direction.

[0009]

The above-mentioned conventional choke coil for large current, which uses the spectacle-shaped winding of the rectangular electric wire, has a rectangular concave portion of the rectangular base having a rectangular concave portion formed in the center thereof. Since the lower part of the insulating partition plate is fitted and the bases on both sides of the UU-shaped core are fixed by screwing the U-shaped core fixing brackets, it is difficult to accurately position the inductor body on the rectangular base, and the positioning assembly At the same time, there are drawbacks that require extra man-hours and disadvantages that the strength of butting the cores cannot be constant and the electric characteristics vary widely.

In the box-shaped noise filter, both the choke coil using the toroidal core and the choke coil using the winding of the rectangular electric wire are insulated for connection with the external connection terminal provided in the box-shaped metal container. Since it is a structure that uses a covered electric wire or a conductive plate, there is a drawback in that the connecting work requires more man-hours for a skilled worker and the assembly cost of the box-shaped noise filter becomes expensive.

When the wide rectangular wire is bent with a small radius of curvature toward the center of the winding wound in a tubular shape by winding the surface in the width direction of the rectangular electric wire, the thickness on the inner diameter side of the winding increases. To avoid forming a cylindrical winding that does not increase the thickness on the inner diameter side of the winding.

[0012]

[Means for Solving the Problems] A box-shaped winding formed by a rectangular electric wire, a box-shaped insulating partition plate for insulating between the box-shaped windings, and an insulating cylinder for insulating the inside of the box-shaped winding. The inductor body that incorporates the UU-shaped core is provided with elongated recesses and arc recesses on the insulating base in correspondence with the spectacle-shaped insulating partition plate and the spectacle-shaped winding, and the heavy spectacle-shaped winding is accurately and firmly fixed. And the inductor body is fixed on the insulating base by pressing both side bases of the UU core with a pair of U-shaped core fixing metal fittings or spring plates. Fit the spectacle-shaped insulating partition plate in the elongated recess and the spectacle-shaped winding in the arc-shaped recess on the insulation base, and press the UU-shaped core against the UU-shaped core base with the U-shaped core fixing bracket or the spring plate. The choke coil for large current of the present invention is mounted.

The both ends of the spectacle-shaped electric wire, which is composed of two windings of a rectangular electric wire wound in the same winding direction in a tubular shape with the electric wire vertical, are outwardly directed in opposite directions. The faston terminal part is formed at the tip, and the choke coil that combines this spectacle-shaped winding and the split type closed magnetic circuit core is housed in a box-shaped metal container. The box-shaped noise filter of the present invention is made to be in an insulated state and protrudes to the outer surface of the box-shaped metal container.

The cross-sectional shape of the rectangular electric wire used for the winding wound in a cylindrical shape is defined by the thickness on the inner diameter side of the winding, which is used as the winding wound in a tubular shape, with the surface parallel to the width direction of the rectangular electric wire as the winding surface. A thin rectangular wire with a trapezoidal cross section whose outer diameter side is thicker on the outer diameter side and whose bottom is the outer diameter side, and even if laminated in the thickness direction, a gap may be created between the outer diameter side of the winding. In addition, the windings should be cylindrical so that the windings are not bulky.

According to the present invention, when a rectangular electric wire is laminated in the thickness direction, the same winding direction is formed into a cylindrical shape, and the folding is made into a shape of a figure of eight, a current flows through two windings. Arrange the windings on the same surface so that the magnetic fields generated by the individual cylindrical windings strengthen each other to form a closed magnetic circuit, and form the eyeglass-shaped windings to form faston terminals at both ends of the rectangular wire and the glasses. A plurality of shaped windings are arranged in the same winding direction, and a spectacle-shaped insulating partition plate that insulates the layers of the spectacle-shaped winding is inserted into the inner diameter of the winding. With the insulating cylinder to insulate,
An inductor body in which UU-shaped cores are combined with each other to form an insulation body, an elongated recess for inserting and assembling the spectacle-shaped insulating partition plate, an arc-shaped recess for positioning the spectacle-shaped winding, and a base of the UU-shaped core incorporated in the inductor. And a pair of U-shaped metal fittings for pressing and fixing the insulation base, and the elongated recess on the insulation base is fitted with the spectacle-shaped insulating partition plate, and the arc-shaped recess is fitted with the spectacle-shaped winding. Then, the UU-shaped core is pressed by a U-shaped core fixing metal fitting for fixing the UU-shaped core to the step portion, the inductor body is mounted on the insulating base, and the choke coil for large current is fixed.

According to the present invention, when the rectangular electric wires are laminated in the thickness direction and are formed in the same direction in a cylindrical shape and folded back in the shape of a figure of eight, when two currents flow through the two windings, Eyeglass-shaped windings and eyeglass-shaped windings in which windings are arranged on the same surface so that the magnetic fields generated by the respective cylindrical windings strengthen each other to form a closed magnetic circuit, and faston terminals are formed at both ends of the rectangular electric wire. Insert a plurality of windings in the same direction as the winding direction to insulate the layers of the spectacle-shaped winding. Insert the spectacle-shaped insulating partition plate into the inner diameter of the winding to insulate the core from the winding. With the insulating cylinder,
An inductor body in which UU-shaped cores are formed by being insulated from each other, an elongated concave portion into which the above-mentioned spectacle-shaped insulating partition plate is inserted and assembled, an arc-shaped concave portion for positioning the above-mentioned spectacle-shaped winding, and a base portion of the UU-shaped core incorporated in the above-mentioned inductor A UU-shaped core is formed by fitting an insulating base plate to which a pair of spring plates that are pressed and fixed is fitted, and a spectacle-shaped insulating partition plate into the elongated recess of the insulating base, and fitting a spectacle-shaped winding into the arc-shaped recess. It is a choke coil for large current, which is pressed by the spring plate, and the inductor body is mounted and fixed on an insulating base.

According to the present invention, when a rectangular electric wire is laminated in the thickness direction, the same winding direction is formed into a cylindrical shape, and the folding is made into a shape of a figure of eight, a current is applied to two windings. Arrange so that the magnetic fields created by the individual cylindrical windings strengthen each other to form a closed magnetic circuit, and extend both ends of the rectangular wire outward in opposite directions to form the Faston terminal at the tip. A plurality of shaped windings are arranged in the same winding direction,
An eyeglass type insulation partition plate that insulates the layers of the eyeglass type winding,
Combine the UU-shaped core of the split type closed magnetic circuit core with the built-in body that incorporates the insulating cylinder that insulates the inside diameter of the winding,
Fit an eyeglass-shaped insulating partition plate into the elongated recess on the insulating base, on the insulating base having an elongated recess that fits with the eyeglass-shaped insulating partition plate and an arc-shaped recess that positions the eyeglass-shaped winding. , A large-current choke coil in which a spectacle-shaped winding is installed in a circular arc concave portion and fixed by a U-shaped core fixing bracket is stored in a box-shaped metal container having a square notch on the opposite surface from which the Faston terminal is pulled out, An insulating terminal plate made of an insulating plate having a through hole is inserted into the rectangular notch of the box-shaped metal container, the Faston terminal portion is inserted through the through hole to insulate and project to the outer surface of the box-shaped metal container. A box-shaped noise filter is characterized in that a capacitor is connected between terminals at both ends of a line and between one terminal and a box-shaped metal container.

According to the present invention, when a rectangular electric wire is laminated in the thickness direction, the same winding direction is formed into a cylindrical shape, and the turns are formed in the shape of a figure of eight, when a current flows through two windings, Arrange so that the magnetic fields created by the individual cylindrical windings strengthen each other to form a closed magnetic circuit, and extend both ends of the rectangular wire outward in opposite directions to form the Faston terminal at the tip. A plurality of shaped windings are arranged in the same winding direction,
An eyeglass type insulation partition plate that insulates the layers of the eyeglass type winding,
Combine the UU-shaped core of the split type closed magnetic circuit core with the built-in body that incorporates the insulating cylinder that insulates the inside diameter of the winding,
On an insulating base on which an elongated recess to be fitted with the spectacle-shaped insulating partition plate and an arc-shaped recess for positioning the spectacle-shaped winding are formed,
A large current choke coil in which a spectacle-shaped insulating partition plate is fitted in an elongated recess on the insulating base and a spectacle-shaped winding is installed in an arc-shaped recess and is fixed by a spring plate. It is housed in a box-shaped metal container with a rectangular cutout, and an insulating terminal plate consisting of an insulating plate with a through hole is combined and inserted into the rectangular cutout of the box-shaped metal container, and the faston terminal is passed through the through hole. A box-shaped noise filter characterized by being insulated and projected to the outer surface of a box-shaped metal container, and a capacitor being connected between the terminals at both ends of the spectacle-shaped winding and between the terminal and the box-shaped metal container. Is.

According to the present invention, in a winding wire in which rectangular electric wires are laminated in the thickness direction and wound in a tubular shape, the inner diameter side thickness of the winding wire wound in a tubular shape in a width direction orthogonal to the thickness direction of the rectangular electric wire. A winding wire for a large current choke coil, characterized in that it is formed by a rectangular electric wire having a trapezoidal cross section, which is thinner than the outer diameter side thickness.

According to the present invention, the thickness of a rectangular wire having a trapezoidal cross section, which is thinner than the thickness on the outer diameter side, of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction When the current flows through the two windings that are wound in the same winding direction and laminated in the vertical direction in the same winding direction and folded back in the shape of a figure of eight, make two individual cylindrical windings A pair of windings are formed by arranging the windings on the same surface so that the magnetic fields reinforce each other to form a closed magnetic circuit and forming faston terminals at both ends of the rectangular electric wire, and a plurality of the spectacle-shaped windings. They are arranged in the same direction of rotation and are insulated from each other by a spectacle-shaped insulating partition plate that insulates the layers of the spectacle-shaped winding and an insulating cylinder that is inserted into the inner diameter of the winding to insulate the core and the winding. The inductor body formed by combining the UU type core, the elongated recess for inserting and assembling the eyeglass-shaped insulating partition plate, and the eyeglass Insulation base provided with arcuate recesses for positioning the shaped winding and stepped parts for mounting a pair of U-shaped metal fittings for pressing and fixing the base of the UU core incorporated in the inductor, and eyeglasses for the elongated recesses on the insulation base. -Shaped insulating partition plate is fitted, the eyeglass-shaped winding is fitted in the arc recess, and the UU-shaped core is fixed to the stepped portion by pressing with the U-shaped core fixing bracket, and the inductor body is mounted and fixed on the insulation base. This is a large current choke coil.

According to the present invention, the thickness of a rectangular wire having a trapezoidal cross section, which is thinner than the thickness on the outer diameter side, of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction When the current flows through the two windings that are wound in the same direction in a cylindrical shape and folded in the shape of a figure 8 in the same direction, the magnetic fields created by the two cylindrical windings A pair of windings are formed by arranging the windings on the same surface so as to strengthen each other to form a closed magnetic circuit and form faston terminals at both ends of the rectangular electric wire, and a plurality of the glasses-shaped windings. The UU type is insulated from each other by the spectacle-shaped insulating partition plate that arranges the directions in the same direction and insulates the layers of the spectacle-shaped winding and the insulating cylinder that is inserted into the inner diameter of the winding and insulates the core and the winding. Inductor body formed by combining cores, elongated recesses for inserting and assembling the eyeglass-shaped insulating partition plate, and A circular arc recess for positioning the shaped winding and a pair of spring plates for pressing and fixing the base of the UU core incorporated in the inductor, and an eyeglass-shaped insulating partition plate fitted in the elongated recess of the insulating base. As well as
It is a choke coil for large current in which an eyeglass-shaped winding is fitted in an arcuate recess, a UU-shaped core is pressed by the spring plate, and an inductor body is mounted and fixed on an insulating base.

According to the present invention, the thickness of a rectangular wire having a trapezoidal cross section, which is thinner than the thickness on the outer diameter side, of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction When the current flows through the two windings that are wound in the same winding direction and laminated in the vertical direction in the same winding direction and folded back in the shape of a figure of eight, make two individual cylindrical windings Arrange so that the magnetic fields reinforce each other to form a closed magnetic circuit, extend both ends of the rectangular electric wire outwards in opposite directions, and form a faston terminal at the tip. The split type closed magnetic circuit core of the split-type closed magnetic circuit core is installed in the assembly body in which the winding direction is arranged in the same manner and the spectacle-shaped insulating partition plate for insulating the layers of the spectacle-shaped winding and the insulating cylinder for insulating the inside of the winding are incorporated. The UU type core is combined to position the elongated recess and the spectacle winding that fit with the spectacle type insulating partition plate. On an insulating base formed with the arc recessed portion,
Fitting a spectacle-shaped insulating partition plate in the elongated recess on the insulating base, installing a spectacle-shaped winding in the arc-shaped recess, and fixing it with a U-shaped core fixing bracket It is housed in a box-shaped metal container having a rectangular notch on the opposite surface to be pulled out, and an insulating terminal plate made of an insulating plate having a through hole is inserted into the rectangular notch of the box-shaped metal container to insert the faston terminal portion into the through hole. It is characterized in that a capacitor is connected between each terminal at both ends of the box-shaped winding and between one terminal and the box-shaped metal container by insulating through the wire and protruding to the outer surface of the box-shaped metal container. It is a box-shaped noise filter.

According to the present invention, the thickness of a rectangular wire having a trapezoidal cross section, which is thinner than the thickness of the outer diameter side, of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction When the current flows through the two windings that are wound in the same winding direction and laminated in the vertical direction in the same winding direction and folded back in the shape of a figure of eight, make two individual cylindrical windings Arrange so that the magnetic fields reinforce each other to form a closed magnetic circuit, extend both ends of the rectangular electric wire outwards in opposite directions, and form a faston terminal at the tip. The split type closed magnetic circuit core of the split-type closed magnetic circuit core is installed in the assembly body in which the winding direction is arranged in the same manner and the spectacle-shaped insulating partition plate for insulating the layers of the spectacle-shaped winding and the insulating cylinder for insulating the inside of the winding are incorporated. The UU type core is combined to position the elongated recess and the spectacle winding that fit with the spectacle type insulating partition plate. A choke for large current in which an eyeglass-shaped insulating partition plate is fitted in an elongated recess on the insulation base, an eyeglass-shaped winding is installed in the arc recess, and fixed by a spring plate on the insulation base with the arc recess formed. The coil is housed in a box-shaped metal container having a rectangular notch on the opposite surface from which the faston terminal is pulled out, and an insulating terminal plate consisting of an insulating plate having a through hole is combined and inserted in the rectangular notch of the box-shaped metal container. Then, insulate the Faston terminal part through the through hole and insulate it so as to project to the outer surface of the box-shaped metal container, and connect a capacitor between each terminal of both ends of the box-shaped winding and between the terminal and the box-shaped metal container. A box-shaped noise filter characterized by the following.

[0024]

The elongated recesses and arc recesses provided on the insulation base position the insulation partition plate and the spectacle-shaped winding firmly on the insulation base and firmly fix them, and the pair of U-shaped core fixing brackets and leaf springs The base of the UU-shaped core of the closed magnetic circuit core is abutted and held with a constant strength, and the inductor body is fixed to the insulating base.

Faston terminals are formed at both ends of the spectacle-shaped winding so that the ends of the spectacle-shaped winding are directly connected to the outer conductor. The Faston terminals are electrically insulated from the box-shaped metal container by an insulating terminal plate. It becomes an external connection terminal of the box type noise filter.

The rectangular electric wire forming the spectacle-shaped winding has a trapezoidal cross section because the inner diameter side of the cylindrical winding is thinner than the outer diameter side of the winding and the cross section is preliminarily formed into a trapezoidal shape. By forming the tubular winding so that the side with the shorter side of the cross section is the inner diameter side of the winding and the thinner side in the width direction is the inner diameter side of the tubular winding, Prevents excess stacking thickness on the inner diameter side of the winding when forming a rectangular or rectangular parallelepiped electric wire into a tubular shape, and prevents the formation of extra gaps between the wires on the outer diameter side of the winding. A winding for a large current choke coil in which the electric wires that are laminated in the vertical direction are laminated without a gap.

[0027]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a first embodiment of a large-current choke coil according to the present invention. A choke coil 1 is a three-phase common mode choke coil. It is fixed to the insulating base 2 by the letter-shaped core fixing metal fitting 3a. The choke coil 1 includes the spectacle-shaped winding 7 shown in FIG.
As shown in FIG. 1, three UU-shaped cores 8 are combined with two eyeglass-shaped windings arranged in the same winding direction.

The spectacle-shaped winding 7 has a rectangular cross section (rectangular shape),
Alternatively, by stacking trapezoidal rectangular electric wires in the thickness direction and winding them in a cylindrical shape with the width direction orthogonal to the thickness direction facing the center of the cylindrical winding, the first cylindrical winding ( (The winding on the left side in the figure)
After winding 71 and winding a predetermined number of turns, the winding moves to a cylindrical winding 72 on the right side in the shape of figure 8, and the second winding is wound.
The number of turns of the left and right windings should be the same when the common mode choke coil is formed to reduce leakage inductance and stray capacitance, and to reduce the size of the inductor body. Wind a few turns or less.

The spectacle-shaped winding is made of a single rectangular wire, and when an electric current is applied to the spectacle-shaped winding, the magnetic fields generated by two adjacent windings are wound in directions to urge each other. When assembling UU-shaped cores in two adjacent windings, the windings are wound so that a high inductance is produced at both ends of the spectacle-shaped winding.

The spectacle-shaped winding can be mechanically wound, and both ends of the spectacle-shaped winding are collinearly and parallelly extended outwardly in opposite directions to a required length to form faston terminal portions 73 at both ends. There is.

In the assembly of the choke coil 1, the spectacle-shaped winding 7 is identically provided between four spectacle-shaped insulating partition plates 9 each having two through holes corresponding to the central hole of the spectacle-shaped winding. Arranged one by one in the winding direction and concentrically sandwiching three in parallel for three phases,
In the single phase, two pieces are arranged in parallel, the insulating cylinder 10 is inserted into the through hole and the communication hole in the inner diameter of the eyeglass winding 7, and the magnetic legs 81 of the UU core 8 are inserted from both sides of the insulating cylinder 10. Match.

The assembled assembly is mounted on the insulating base 2 and the spectacle-shaped insulating partition plate 9 is fitted into the elongated recess 21 of the insulating base 2 and the lower part of the spectacle-shaped winding is fitted into the arc-shaped recess 22 of the insulating base 2. After that, the two U-shaped core fixing brackets 3a are fitted into the stepped portion 23 of the insulating base 2 and brought into contact with the base portion 82 of the UU-shaped core 8 so that the U-shaped core fixing bracket 3a passes through the through hole 33 to pass through the stepped portion. It is screwed into the screw hole 24 of 23. The UU-shaped core 8 is held in the closed magnetic circuit to complete the assembly of the choke coil 1, and at the same time, the choke coil 1 is fixed to the insulating base 2.

When the fixing between the inductor body and the insulating base is unstable, a small amount of adhesive is injected into the elongated concave portion 21 and the circular arc concave portion 22 so that the spectacle-shaped insulating partition plate 9 and the spectacle-shaped winding 7 are formed.
And are securely fixed to the insulating base 2.

FIG. 2 is an exploded perspective view showing a second embodiment of the large current choke coil according to the present invention. The choke coil 1 is a three-phase common mode choke coil as in the first embodiment. The difference from the first embodiment is that the spring plates 3b are fixed to the step portions 23 on both sides. Spring plate 3b
Is a shallow gutter-shaped holding piece 31 in which a vertical plate having a spring property is bent in two steps toward the center side of the insulating base 2 so that the free end corresponds to the outer surface of the base portion 82 of the UU-shaped core 8. It was formed. The holding piece 31 is at a predetermined height, and the distance between the two holding pieces in the free state is set to be slightly smaller than the distance between the outer surfaces of the base portion 82 when the two UU-shaped cores 8 are butted. . Therefore, the inductor main body in which the magnetic legs 81 of the UU-shaped core 8 are inserted from both sides into the insulating cylinder 10 which is combined with the spectacle-shaped winding 7 and the spectacle-shaped insulating partition plate 9 and is abutted to the insulating base 2, Partition board 9 to insulation base 2
When pressed against the elongated concave portion 21 of the UU from above, UU
The base portion 81 of the shaped core 8 is in sliding contact with the upper portion of the spring plate 3b, pushes the spring plate 3b outward and fits it into the sandwiching piece 31, and at the same time, the lower portion of the spectacle-shaped insulating partition plate 9 is formed into the elongated recess 21 and the spectacle-shaped portion. The lower part of the winding 7 fits into the arcuate recess 22 and can be fixed to the insulating base 2.

The spring plate 3b may have a shape different from that shown in FIG. 2 as long as the UU-shaped core 8 can be butted and fixed at the same time. When the fixing by the U-shaped fixing metal fitting 3a and the spring plate 3b is unstable, the elongated concave portion 21,
A small amount of adhesive is injected into the arcuate concave portion 22 to fix the spectacle-shaped insulating partition plate 9 and the spectacle-shaped winding 7 to the insulating base 2 to ensure the fixing of the inductor body.

FIG. 3 is an exploded perspective view showing an embodiment in which the large current choke coil shown in FIG. 1 is used as the large current choke coil of the box type noise filter according to the present invention. In the box type noise filter of FIG.
In the example using the three-phase common mode choke coil shown in Fig. 2, the box noise filter of the present invention can be similarly constructed by the choke coil shown in Fig. 2.

The box-shaped metal container 4 has a structure in which an insulating terminal plate 6 is fitted into a rectangular notch 5 provided on the opposite side wall at the upper surface opening, and the opening is closed with a lid 20.

The box-shaped noise filter is assembled by the insulating base 2.
The through holes 61 of the insulating terminal plate 6 are passed through the Faston terminal portions 73 of the spectacle-shaped winding 7 of the choke coil 1 fixed to. In FIG. 3, one insulating terminal plate 6 is shown in a penetrating state. Next, the assembly of the choke coil 1, the insulating base 2 and the insulating terminal board 6 is provided in the box-shaped metal container 4 with the fitting groove 62 provided on the four peripheral surfaces of the insulating terminal board 6 and the cutout end of the rectangular notch 5. The housing is fitted with the portion 51, and the insulating base 2 is positioned on the inner bottom of the box-shaped metal container 4 and screwed.

Between the wires extending on both sides of the eyeglass-shaped winding assembled in three phases, the inter-terminal capacitors 11 are connected between the three phases on both sides of the eyeglass-shaped winding, and one wire and the ground side (box). The terminal grounded capacitor 13 is also connected to the (shaped metal container side) to form a noise filter. Choke coil 1
Is fastened to the box-shaped metal container 4 and the faston terminal portion 73 projects outward from the insulating terminal plate 6 by a required length. Metal lid 2
No. 0 collar 20a is fitted into and fixed to the cutout end portion 51 of the rectangular cutout 5 of the box-shaped metal container 4, and the fitting groove 62 of the insulating terminal plate 6 is fixed.
Then, the box-shaped metal container 4 and the lid 20 are soldered together to complete the process.

FIG. 6 shows a cylindrical winding according to the present invention,
This is a winding 14 of a trapezoidal rectangular electric wire having a trapezoidal cross section formed by stacking and winding a rectangular electric wire having a trapezoidal cross section in the thickness direction of the rectangular electric wire.

FIG. 7 shows a trapezoidal section rectangular electric wire 1 according to the present invention.
It is 3. When using a trapezoidal rectangular flat electric wire having a trapezoidal cross section 13c as a cross section and stacking the trapezoidal rectangular flat wire in the thickness direction to form a tubular winding, the inner diameter side 1 of the tubular winding
3a is a trapezoidal rectangular cross-section electric wire that is thinner than the outer diameter side 13b, and has the outer diameter side 13a in the thickness direction as the bottom side and the outer diameter side 13b as the upper side. It is a trapezoidal cross section rectangular electric wire having a trapezoidal cross section 13c.

FIG. 8 is a view showing one cross section of the winding 14 of the cylindrical trapezoidal section rectangular electric wire using the trapezoidal section rectangular electric wire shown in FIG. 7 according to the present invention. Since trapezoidal rectangular rectangular wires are wound with the thin side of the cross section being the inner diameter side of the cylindrical winding, the trapezoidal rectangular rectangular wires are stacked. The surfaces are almost parallel, and the gap 17 between the wires is smaller than the case where a rectangular rectangular wire with a rectangular cross section or a square wire is used in the related art, and the unnecessary clearance can be reduced, and the stacking dimension of the winding wire is reduced. On the other hand, the effective winding sectional area can be increased.

The inner side 13a of the trapezoidal rectangular electric wire
The ratio of the length of the outer diameter side 13b to the length of the outer diameter side 13b is determined by the inner diameter and outer diameter ratio of the cylindrical winding. The effect of using is great.

When the trapezoidal flat wire having a trapezoidal cross section of the present invention is applied to the spectacle-shaped winding 7 shown in FIG. 4, a spectacle-shaped winding having a small gap between the electric wires on the outer diameter side of the cylindrical winding is used. By using the trapezoidal section rectangular electric wire of the present invention that can be formed into a box-shaped winding, a three-phase common mode choke coil for large current, which is incorporated in three in-phase shown in FIGS. 1 and 2, Alternatively, a single-phase large-current common-mode choke coil in which two eyeglass-shaped windings are incorporated in the same phase, or two eyeglass-shaped windings in the opposite phase, and a UU-type metal magnetic powder magnetic core Can be formed into a normal choke coil for large current, etc., and a common mode choke coil for large current, a normal choke coil for large current, and a capacitor can be combined to form a box noise filter shown in FIG. Types of noise filters can be configured

[0045]

Effect of the Invention The present invention provides an inductor body in which a UU-shaped core is combined with a spectacle-shaped winding that is wound by using a rectangular electric wire in which the winding-shaped insulating partition plate electrically insulates between the windings and the inner diameter of the winding with an insulating cylinder. , An elongated recess that fits in the spectacle-shaped insulating partition plate and an arc-shaped recess that positions the bottom of the winding are provided, and the base of the UU-shaped core incorporated in the spectacle-shaped winding is pressed toward the core joint surface. Since it has a structure in which it is fitted and fixed to a pair of U-shaped core fixing metal fittings or an insulating base provided with a pair of spring plates and is pressed and mounted, the inductor body can be fast and surely fixed to the insulating base. This has the effect of reducing the number of steps for assembling the current choke coil, and the effect of stabilizing the butt strength of the UU-shaped core of the split magnetic core and reducing the variation in the characteristics of the choke coil.

2. The box-shaped noise filter according to the present invention is
Since the end portion of the winding is used as the external connection terminal as it is by using the spectacle-shaped winding of the rectangular wire, the noise filter can be easily assembled in a short time and the assembly cost can be reduced. And, it is possible to provide a box-shaped noise filter for large current, which is excellent in characteristics and quality, at low cost.

Further, the inductor body and the insulating base on which the inductor body is placed are an elongated strip in which the spectacle-shaped insulating partition plate for insulating between the spectacle-shaped windings of the inductor body and the spectacle-shaped winding are provided on the insulating base. It has a structure that fits in the recess and the arc recess, and the UU-shaped core incorporated in the spectacle-shaped winding has a U-shaped core fixing metal fitting installed oppositely or a UU by a spring plate.
The structure is such that the base of the shaped core is pressed, and the heavy eyeglass-shaped winding can be reliably positioned on the insulating base, so the joining pressure at the core butting surface of the UU-shaped core of the split type magnetic core is always constant. It is possible to provide a box-shaped noise filter using a choke coil for large current, which can be pressed and has high reliability.

3. According to the present invention, a trapezoidal winding using a trapezoidal rectangular electric wire having a difference in thickness at both ends is a conventional rectangular electric wire having a rectangular or rectangular cross section, and is formed by stacking and winding in a thickness direction. Compared to the winding, the gap between the outer diameter side of the cylindrical winding wound in a tubular shape can be made smaller, so when the winding is formed by stacking in the thickness direction, the conventional square , Or using rectangular rectangular electric wire, the area of the laminated cross section of the electric wire can be increased and the conventional rectangular electric wire with the same current capacity and the same inductor value can be used when the same laminated dimensions are used. Compared with the time of use, the choke coil can be made smaller.

The tubular winding formed using the trapezoidal rectangular cross-section electric wire of the present invention exerts a greater effect when a small-sized large-current choke coil requiring a large current is formed.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a first embodiment of a large current choke coil according to the present invention.

FIG. 2 is an external perspective view showing a second embodiment of a large current choke coil according to the present invention.

3 is an exploded perspective view of a box-shaped noise filter according to the present invention, the noise filter including the large-current choke coil shown in FIG.

FIG. 4 is an external perspective view of a spectacle-shaped winding.

FIG. 5 is an external perspective view showing a conventional large current choke coil.

FIG. 6 is an external perspective view showing a large current choke coil winding using a trapezoidal rectangular electric wire according to the present invention.

FIG. 7 is a cross-sectional view showing a trapezoidal rectangular flat electric wire used for a large current choke coil winding according to the present invention.

FIG. 8 is a cross-sectional view of one half of a tubular winding of a trapezoidal rectangular electric wire which is a winding for a large current choke coil according to the present invention.

FIG. 9 is a cross-sectional view of a conventional rectangular electric wire.

FIG. 10 is a cross-sectional view of one half of a tubular winding using a conventional rectangular electric wire.

[Explanation of symbols]

 1 choke coil 2 insulation base 2a square base 3a U-shaped core fixing metal fitting 3b spring plate 4 box-shaped metal container 5 square cutout 6 insulating terminal plate 7 eyeglass winding 8 insulation core plate 10 insulating partition plate 10 insulating cylinder 11 Capacitor between terminals 12 Capacitor between terminals 12a Terminal side lead wire 13 Trapezoidal section flat wire 13a Inner diameter side 13b Outer side 13c Trapezoidal section 14 Trapezoidal section Rectangular wire winding 14a, 16a Winding inner diameter side 14b, 16b Outside winding Radial side 14c, 16c Winding cross section 15 Rectangular cross-section rectangular electric wire 15c Rectangular cross-section rectangular electric wire 16 Rectangular cross-section rectangular electric wire coil 17 Gap 20 Lid body 20a Collar 21 Slender recess 22 Arc arc recess 23 Step 24, 25 Screw hole 26 Central recess 31 Clamping Piece 32, 33 Through hole 41 Through hole 42 Mounting notch 51 Notch end 61 Through hole 6 Fitting grooves 71 and 72 cylindrical winding 73 Faston terminal portion 81 magnetic leg 82 base

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H01F 27/02

Claims (9)

[Claims] 1. When a flat wire is laminated in the thickness direction, the same winding direction is formed into a tubular shape, and the turns are formed into a figure eight shape, when two currents flow through two windings, the two windings are wound. Eyeglass-shaped windings and eyeglass-shaped windings for arranging the windings on the same surface so that the magnetic fields generated by the respective cylindrical windings strengthen each other to form a closed magnetic circuit and form faston terminals at both ends of the rectangular electric wire. Insert a plurality of wires in the same winding direction to insulate the layers of the spectacle-shaped winding, and insert them into the inner diameter of the winding to insulate the core from the winding. An inductor main body in which a UU-shaped core is insulated from each other by an insulating cylinder to form a combination, an elongated concave portion into which the spectacle-shaped insulating partition plate is inserted and assembled, and an arc-shaped concave portion for positioning the spectacle-shaped winding and the inductor are incorporated into the inductor. Install a pair of U-shaped brackets that press and fix the base of the UU core. An insulating base with a step to attach
The spectacle-shaped insulating partition plate is fitted into the elongated recess on the insulating base, and the spectacle-shaped winding is fitted into the arc-shaped recess, and U
A choke coil for large currents, which is formed by pressing the U-shaped core to the stepped portion with a U-shaped core fixing metal fitting and mounting and fixing the inductor body on the insulating base. 2. When electric currents flow through two windings formed by stacking rectangular electric wires in the thickness direction and forming a cylindrical shape in the same direction and folding back in the shape of a figure eight, Eyeglass-shaped windings and eyeglass-shaped windings in which windings are arranged on the same surface so that the magnetic fields generated by the cylindrical windings strengthen each other to form a closed magnetic circuit, and faston terminals are formed at both ends of the rectangular electric wire. An insulating cylinder that insulates the core and the winding by inserting a plurality of the , An inductor body in which UU-shaped cores are formed by being insulated from each other, an elongated concave portion into which the eyeglass-shaped insulating partition plate is inserted and assembled, an arc-shaped concave portion for positioning the eyeglass-shaped winding, and a UU-shaped core incorporated in the inductor Fix a pair of spring plates that press and fix the base of The insulating base and the elongated recess of the insulating base are fitted with the spectacle-shaped insulating partition plate, the spectacle-shaped winding is fitted in the arc-shaped recess, and the UU-shaped core is pressed by the spring plate. A choke coil for large current, which is made by mounting the inductor body on the base and fixing it. 3. When a flat wire is laminated in the thickness direction, the same winding direction is made into a tubular shape, and the folding is made into a figure 8 shape, when two windings are wound with current, the two windings are wound. Arrange so that the magnetic fields created by each cylindrical winding strengthen each other to form a closed magnetic circuit, and extend both ends of the rectangular wire outward in opposite directions to form a faston terminal at the tip. Built-in by arranging multiple wires in the same winding direction and incorporating a spectacle-shaped insulating partition plate that insulates the layers of the spectacle-shaped winding and an insulating cylinder that insulates the inside of the winding. On the body,
The UU-shaped core of the split type closed magnetic circuit core is combined to form an elongated recess for fitting with the spectacle-shaped insulating partition plate and an arc-shaped recess for positioning the spectacle-shaped winding on the insulating pedestal. A large-current choke coil in which an eyeglass-shaped insulating partition plate is fitted in the elongated recess, the eyeglass-shaped winding is installed in the arcuate recess, and is fixed with a U-shaped core fixing bracket, is cut into squares on the opposite surface where the Faston terminal is pulled out. Store in a box-shaped metal container with a notch, insert an insulating terminal plate consisting of an insulating plate having a through hole into the rectangular notch of the box-shaped metal container, and insert the Faston terminal through the through hole for insulation. A box-shaped noise filter, characterized in that a capacitor is connected between each terminal at both ends of an eyeglass-shaped winding and between one terminal and a box-shaped metal container so as to project to the outer surface of the box-shaped metal container. 4. When a flat wire is laminated in the thickness direction, the same winding direction is formed into a cylindrical shape, and the turns are formed in the shape of a figure of eight, when two currents flow through the two windings, Arrange so that the magnetic fields created by each cylindrical winding strengthen each other to form a closed magnetic circuit, and extend both ends of the rectangular wire outward in opposite directions to form a faston terminal at the tip. Built-in by arranging multiple wires in the same winding direction and incorporating a spectacle-shaped insulating partition plate that insulates the layers of the spectacle-shaped winding and an insulating cylinder that insulates the inside of the winding. On the body,
The UU-shaped core of the split type closed magnetic circuit core is combined, and the elongated recess on the insulating base is formed on the insulating base on which the elongated recess that fits with the spectacle-shaped insulating partition plate and the arc-shaped recess that positions the spectacle-shaped winding are formed. A large-current choke coil in which a spectacle-shaped insulating partition plate was fitted in the recess, a spectacle-shaped winding was installed in the arc-shaped recess, and was fixed by a spring plate, and a square notch was provided on the opposite surface from which the Faston terminal was pulled out. A box-shaped metal container which is housed in a box-shaped metal container, and an insulating terminal plate made of an insulating plate having a through hole is combined and inserted into the rectangular cutout of the box-shaped metal container to insert the Faston terminal portion into the through-hole for insulation. A box-shaped noise filter, characterized in that capacitors are connected to both terminals of both ends of an eyeglass-shaped winding and between the terminals and a box-shaped metal container so as to project to the outer surface of the box-shaped winding. 5. In a winding in which rectangular electric wires are laminated in a thickness direction and wound in a tubular shape, a thickness of an inner diameter side of the winding wound in a tubular shape in a width direction orthogonal to a thickness direction of the rectangular electric wire is determined. A winding wire for a large current choke coil, characterized by being formed by a rectangular electric wire having a trapezoidal cross section, which is thinner than the outer diameter side thickness. 6. A rectangular electric wire having a trapezoidal cross section, which is thinner than an outer diameter side of an inner diameter side thickness of a winding wound in a tubular shape in a width direction orthogonal to the thickness direction. It was laminated on and rolled in a tube shape in the same winding direction and folded back in the shape of a figure 2 2
Arrange the windings on the same plane so that the magnetic fields created by the two cylindrical windings strengthen each other when a current flows through the windings, forming a closed magnetic circuit, and faston terminals at both ends of the rectangular wire. And a spectacle-shaped insulating partition plate that insulates the layers of the spectacle-shaped winding by arranging a plurality of the spectacle-shaped windings in the same winding direction. Insulator body which is inserted into the inner diameter of the core to insulate the core and the winding from each other, and is formed by combining the UU type core with each other, and the elongated recess and the glasses for inserting and assembling the spectacle-shaped insulating partition plate. An insulating base provided with an arcuate recess for positioning the shaped winding and a step for attaching a pair of U-shaped metal fittings for pressing and fixing the base of the UU core incorporated in the inductor,
The spectacle-shaped insulating partition plate is fitted into the elongated recess on the insulating base, and the spectacle-shaped winding is fitted into the arc-shaped recess, and U
A choke coil for large currents, which is formed by pressing the U-shaped core to the stepped portion with a U-shaped core fixing metal fitting and mounting and fixing the inductor body on the insulating base. 7. A rectangular electric wire having a trapezoidal cross section in which the thickness of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction is thinner than the thickness of the outer diameter side. When the current flows through the two windings that are laminated in the same direction in the same shape as the cylindrical shape and folded back in the shape of figure 8, the magnetic fields created by the two respective cylindrical windings strengthen each other. The windings are arranged on the same surface so as to form a closed magnetic circuit, and the eyeglass-shaped windings for forming faston terminals at both ends of the rectangular electric wire and a plurality of the eyeglass-shaped windings are arranged in the winding direction. The UU-shaped core is insulated from each other by the spectacle-shaped insulating partition plate which is arranged in the same direction to insulate the layers of the spectacle-shaped winding and the insulating cylinder which is inserted into the inner diameter of the winding to insulate the core and the winding from each other. Inductor body formed by combination,
An elongated recess into which the spectacle-shaped insulating partition plate is inserted and assembled, an arc-shaped recess for positioning the spectacle-shaped winding, and an insulating base to which a pair of spring plates for pressing and fixing the base of the UU core incorporated in the inductor are fixed; A spectacle-shaped insulating partition plate is fitted in the elongated recess of the insulating base, a spectacle-shaped winding is fitted in the arc-shaped recess, and the UU core is pressed by the spring plate to mount the inductor body on the insulating base. A large current choke coil that is fixed by fixing. 8. A rectangular electric wire having a trapezoidal cross section in which the thickness of the winding wound in a tubular shape in the width direction orthogonal to the thickness direction is thinner than the thickness of the outer diameter side. It was laminated on and rolled in a tube shape in the same winding direction and folded back in the shape of a figure 2 2
When a current flows through each winding, the magnetic fields created by the two cylindrical windings strengthen each other to form a closed magnetic circuit, and both ends of the rectangular wire are directed outward in opposite directions. A plurality of eyeglass-shaped windings that are fastened to form the Faston terminal at the tip and are arranged in the same winding direction to insulate the layers of the eyeglass-shaped winding. A UU-shaped core of a split type closed magnetic circuit core is combined with a built-in body that incorporates an insulating cylinder that insulates the inside of the wire, and an elongated recess that fits with the aforementioned spectacle-shaped insulating partition plate and an arc for positioning the spectacle-shaped winding On the insulating base with the recess formed, fit the spectacle-shaped insulating partition plate to the elongated recess on the insulation base, install the spectacle-shaped winding in the arc-shaped recess, and secure with the U-shaped core fixing bracket. Pull out the faston terminal part of the current choke coil It is housed in a box-shaped metal container having a rectangular cutout on its facing surface, and an insulating terminal plate made of an insulating plate having a through hole is inserted into the rectangular cutout of the box-shaped metal container to fasten the terminal portion into the through hole. A box characterized by being insulated through and projecting to the outer surface of the box-shaped metal container, and connecting a capacitor between each terminal at both ends of the spectacle-shaped winding and between one terminal and the box-shaped metal container. Shape noise filter. 9. A rectangular electric wire having a trapezoidal cross section, which is thinner than the outer diameter side of the inner diameter side thickness of a winding wound in a tubular shape in the width direction orthogonal to the thickness direction. It was laminated on and rolled in a tube shape in the same winding direction and folded back in the shape of a figure 2 2
When a current flows through each winding, the magnetic fields created by the two cylindrical windings strengthen each other to form a closed magnetic circuit, and both ends of the rectangular wire are directed outward in opposite directions. A plurality of eyeglass-shaped windings that are fastened to form the Faston terminal at the tip and are arranged in the same winding direction to insulate the layers of the eyeglass-shaped winding. A UU-shaped core of a split type closed magnetic circuit core is combined with a built-in body that incorporates an insulating cylinder that insulates the inside of the wire, and an elongated recess that fits with the aforementioned spectacle-shaped insulating partition plate and an arc for positioning the spectacle-shaped winding A choke coil for large current, in which a slender recess on the insulating base is fitted with a spectacle-shaped insulating partition plate on the insulating base having the recess, and a spectacle-shaped winding is installed in the arc-shaped recess and fixed by a spring plate. On the opposite surface where the Faston terminal is pulled out. Housed in a box-shaped metal container provided with a yellow,
An insulating terminal plate consisting of an insulating plate having a through hole is combined and inserted into the rectangular notch of the box-shaped metal container, the Faston terminal is inserted through the through hole to insulate and project to the outer surface of the box-shaped metal container, A box-shaped noise filter comprising capacitors connected between terminals at both ends of a winding and between the terminals and a box-shaped metal container.