JPH06244029A - Winding insulating system of magnetic element - Google Patents

Abstract

PURPOSE: To attain a magnetic element winding insulation provided with safeness and optimum electric performance. CONSTITUTION: A magnetic element winding insulation system consists of a magnetic material core having a center core, a peripheral core member and an annular window for accepting a winding wound between the center core and the core member and a magnetic winding consisting of plural ring substrates having center apertures engaged with the center core and having a conductive material for transmitting a current passed through the annular window. The magnetic winding is loaded on the magnetic material core of the magnetic element to charge the ring window so that a current line transmits the current passed through the window, the magnetic winding insulation part consists of two high molecular film members 401, 402 deposited on both the surface of each annular substrate, having peripheral length longer than that of the annular substrate and arranged so as to coat the annular substrate and the conductive material and the coat parts of the members 401, 402 are combined by adhesives so as to seal the current line by insulating it from a magnetic core and its adjacent flexible substrate 405.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic element having a winding of a flat sheet conductor or a magnetic element having a flat conductive path etched, printed or deposited on a flat substrate. An insulation system for a winding of a magnetic element.

[0002]

BACKGROUND OF THE INVENTION The performance of electrical systems and components is highly dependent on the electrically insulating performance of such components and systems. This is especially the case for magnetic elements that utilize electrical windings. Factors such as creep and clearance distance may increase safety but reduce the electrical performance of the device.

[0003]

Accordingly, it is desirable to find an insulating form that provides the required electrical safety performance while also providing optimal electrical performance.

[0004]

[Means for Solving the Problems]

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIGS. 1 to 3 and 6 show US Pat.
This is almost the same as the drawing of the magnetic element structure disclosed in Japanese Patent No. 79,365. A magnetic element winding assembly assembled on a bobbin structure is shown in FIG. Multiple copper sheet conductors 101
Are arranged so as to fit on the supporting bobbin structure 110. Each of the copper sheet windings 101 are interconnected by conductive pins 115 included in the bobbin structure. Each copper sheet winding 101 consists of one winding,
Interconnected with other copper sheet conductors by pins 115,
Form the complete winding supported by the bobbin structure 110.

Each copper sheet conductor 101 is stamped from an annular sheet copper. The sheet conductor has terminal terminals 112 and 113. There is a hole there and the conductive pin 1
Fitting around 15, several conductors are electrically connected to each other to form a winding.

Another structure for each conductive winding of the winding is shown in FIG. In this example, copper conductors 607 are etched, printed or deposited on both sides of flexible substrate 602. The conductors on both sides extend to the terminal end 615 and are connected to the pin 115 of the bobbin structure shown in FIG.
And 604, and the turns are interconnected into windings. The top and bottom conductors attached to the substrate are connected in series with each other by vias 621 and 622.

A magnetic element 201 suitable for use with a flexible sheet conductor is mounted on a circuit board 305 and is shown in plan and elevation views in FIGS. 2 and 3. This element has the bobbin 110 and winding of FIG. The bobbin 110 has a support member 111 on a substrate 305 that supports the device.

The magnetic core 220 is made of a ferrite material and has a base structure 218 and a cover structure 219. The core windows 231 and 232 through which the windings define an annular (circular) path that matches the circular segment of the annular conductor. The window and conductor are sized so that the stacked windings effectively fill the window space.

Details of the insulating construction of the conductors supported by the flexible substrate are shown in FIGS. The insulation system
It is composed of first and second polymer insulating film members 401 and 402 made of a polymer material such as a polyimide film. It is deposited on both sides of flexible substrate 405 supporting conductor tracks 406 and 407 and etched, printed or deposited on both sides of flexible substrate 405 as outlined in FIG. Polyimide insulation film 401
And 402 have a shape that matches the edge of the substrate,
It has a perimeter that is approximately equal to the perimeter of the substrate 405 supporting the conductive material. When this insulating film is bonded,
Form an insulating coating. An adhesive, such as an acrylic adhesive, is applied between the substrate and the polymeric film. Heat and pressure are applied to the assembly by two hot, flexible plates that press the polymer film against the substrate. Under pressure, the film member conforms to the deposited conductor tracks and the inner and outer edges of the substrate material. These polymeric film members are positioned to cover the annular portion of the flexible substrate and the conductive material forming the current paths. The terminal end 425 is
It extends outside the insulation to facilitate interconnection to bobbin pins and other conductors.

The coated portion of the polymeric insulating film of each flexible substrate is attached to the base substrate 405 by an acrylic adhesive to encapsulate the current path through the annular window defined by the magnetic cores of FIGS. Be combined. The board and associated conductors are also insulated from the adjacent flexible boards and the current paths contained therein.

An insulation system attached to a rigid sheet conductor is shown in FIGS. First and second organic polymer (eg polyimide) insulating films 712 and 7
13 is deposited on both sides of the rigid self-supporting conductor 721. The film has a perimeter that is greater than the perimeter of the sheet conductor and covers the conductor. An adhesive is applied to fix the polymer films on both sides of the sheet conductor by heat and pressure and also to each other in the overlapping areas. The film member covers the sheet conductor and the inner and outer peripheral edges of the sheet conductor. The coating coats the sheet conductor so that the conductor through the annular window of the magnetic element core is completely insulated from the core and from adjacent sheet conductors.

The overhanging portions of each polymeric insulating film of the rigid self-supporting conductor are bonded to the conductor and the opposing insulating film by heat and pressure with an acrylic adhesive. This forms an insulating coating that encapsulates the current path through the annular window of the magnetic core and insulates it from the adjacent rigid self-supporting sheet conductor that contains the current path. The two terminal ends 726 and 727 extend outside the insulation to facilitate connection to bobbin pins and other conductors.

The polyimide insulating films 401 and 402 of the embodiments of FIGS. 4 and 5 have shapes and dimensions that match the edges of the substrate, and the perimeter is approximately equal to the perimeter of the substrate 405 supporting the conductive material. However, it is also possible that the insulating coating has a larger perimeter than the substrate 405.

[0015]

As described above, according to the present invention, a magnetic element winding insulation system that realizes optimum electrical performance while providing necessary safety performance is realized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a bobbin configuration of a magnetic element indicating a planar winding of sheet conductors with a coated insulation system attached.

FIG. 2 is a plan view of a magnetic element having a magnetic core using the bobbin and the winding of FIG.

FIG. 3 is an elevation view of a magnetic element having a magnetic core that utilizes the bobbin and the winding of FIG.

FIG. 4 is a plan view of a coated insulation system attached to a flexible substrate with attached conductors.

FIG. 5 is an elevational view of a coated insulation system attached to a flexible substrate with attached conductors.

FIG. 6 is a view of a winding with conductive paths mounted on a flexible substrate and a coated insulator attached.

FIG. 7 is a plan view of a coating insulation system attached to a sheet winding.

FIG. 8 is an elevational view of a coated insulation system attached to a sheet winding.

[Explanation of symbols]

 101 Copper Sheet Conductor 110 Bobbin Structure 111 Support Member 112 End Terminal 113 End Terminal 115 Conductive Pin 201 Magnetic Element 218 Base Structure 219 Cover Structure 220 Magnetic Core 231 Core Window 232 Core Window 305 Circuit Board 401 Polymer Film Member 402 Polymer film member 405 Flexible substrate 406 Conductor path 407 Conductor path 425 Terminal end 602 Flexible substrate 603 Pinhole 604 Pinhole 607 Copper conductor 615 Terminal end 621 Via 622 Via 712 Organic polymer insulating film 713 Organic polymer insulation Film 721 Self-supporting conductor 726 Terminal end 727 Terminal end

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Claims (5)

[Claims] 1. A core of magnetic material having a central core, a perimeter core member, and an annular window for receiving windings located between the central core and the perimeter core member, and a central opening that fits into the central core. And a magnetic winding having a conductive material that acts as a current path adhered to the annular substrate that conducts magnetically induced current through the annular window. Then, the magnetic winding is mounted on the core of the magnetic material of the magnetic element so that the current path fills the annular window so as to conduct the magnetically induced current through the annular window, and the insulation of the magnetic winding is To be deposited on both sides of the annular substrate, having a perimeter longer than the perimeter of the annular substrate and covering the periphery of the substrate to cover the annular substrate and the conductive material forming a current path through the annular window. Located first and second
The polyimide insulating film member of each annular substrate is adhered so that the covering portion of the polyimide insulating film of each annular substrate is insulated from the magnetic core and from the adjacent annular substrate having the current path to enclose the current path through the annular window. A magnetic element winding insulation system characterized by being bonded with an agent. 2. The magnetic element winding insulation system of claim 1, wherein a conductive material is deposited on the annular substrate to act as each winding of the winding. 3. The magnetic element winding insulation system according to claim 1, wherein the conductive material is etched on the annular substrate to act as each winding of the winding. 4. The magnetic element winding insulation system according to claim 1, wherein the annular substrate is made of a conductive material and acts as each winding of the winding. 5. The magnetic element winding insulation system according to claim 1, wherein a conductive material is printed on the annular substrate to act as each winding of the winding.