JPH03212910A - Insulation transformer - Google Patents

Abstract

PURPOSE:To improve insulation and to eliminate secondary disconnection by forming a secondary coil as a transformer coil by winding a lead wire around a secondary spool having a secondary collar based on a primary coil formed by winding a lead wire around a primary spool with a primary brim at both edges. CONSTITUTION:A primary coil is formed by winding a lead wire around a primary spool 2 with a primary collar 3 at both edges. Using this as a base, secondary spool 4 is formed of plastic resin integrally, which has a secondary collar 6 at both ends, covers an outer circumferential exposed part of a coil 1, and insulates the primary coil 1 and a secondary coil 5. The secondary coil 5 is formed by winding a lead wire around the secondary spool 4 and a transformer coil is formed. A magnetic core 7 is inserted through the transformer coil to complete an insulating transformer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to transformers used in various power supply equipment, video equipment, audio equipment, industrial equipment, telephone-related equipment, and the like.

BACKGROUND OF THE INVENTION FIG. 4 is a diagram showing the internal structure of a conventional insulation type transformer. As shown in the figure, flanges are provided at both ends, and the primary lower end flanges 3 have a primary extraction groove 8, and a primary terminal 10 of hard copper or mild steel. The primary coil 1 is wound by winding the conductor around the primary winding frame 2 integrated with the terminal plate 16 in which the secondary terminal 14 is embedded, and the primary lead wire 9 is wound around the primary terminal 10 through the primary lead groove 8 for wiring. Form. This primary coil l has flanges at both ends, and an integrated secondary winding frame 4 having a secondary pull-out groove 12 and insulating the secondary coil 5 is fitted into the secondary lower end N6. The conductor is wound around this secondary winding frame 4, and the secondary drawer lead wire 13 is inserted into the secondary drawer groove 12.
The wire is wound around the secondary terminal 14 through the secondary coil 5.
form. After that, the primary soldering part 11 and the secondary soldering part 15 are soldered simultaneously, and a core 7 made of silicon steel plate or ferrite is attached to this coil, and although not shown, it is inserted into a case made of plastic or the like. An insulating transformer is constructed by filling the gap 17 between the fitted winding frames with an insulating resin.

Problems to be Solved by the Invention As shown above, the conventional insulation transformer is provided with two boppins, the primary winding frame 2 and the secondary winding frame 4, and by fitting these together, the primary coil 1 and the secondary coil 5 are connected. was separated to achieve insulation.

First, since the primary winding frame 2 and the secondary winding frame 4 are each independent and require a plurality of slots, the dimensions of each winding frame may vary depending on the precision of the mold and the molding condition, and the fitting The manufacturing process was such that it was either too hard or too loose, which hindered work stability.

Second, if the fit between the primary winding frame 2 and the secondary winding frame 4 is loose, the secondary winding frame 4 may become loose during secondary winding, leading to disordered winding or the conductor falling off from the secondary winding frame 4. , there are cases where the winding itself is difficult. In such a case, even if the winding is completed, there is a possibility that a serious defect in insulation will occur.

Third, even when the primary winding frame 2 and the secondary winding frame 4 are fitted together, a gap 17 is created between the winding frames, and the distance between the primary winding and the secondary winding according to the safety standards of each country is Although the insulation distance can be secured by the thickness of the secondary winding frame D, it is extremely difficult to secure the spatial creepage distance between the primary winding and the secondary winding, between the primary winding and the core, and between the secondary winding and the core. It has become. There is also a method of filling the gap 17 between the fittings of the winding frame with insulating resin, but the accuracy is left to the transfer of the manufacturing process, and it cannot be said that it will definitely meet the safety standards of each country. . Particularly in the power transformer industry, compatibility with 200V power supplies and even worldwide compatibility are becoming essential conditions. There is an urgent need to develop an isolation transformer with a structure that can ensure this.

Fourth, the inter-coil dimension A of the primary coil 1 and secondary coil 5
is the sum of the winding clearance B of the primary winding frame 2, the fitting clearance C for ensuring fit between the primary winding frame 2 and the secondary winding frame 4, and the secondary winding frame thickness D, which is very large. In addition to occupying a large amount of winding space, the coupling between the primary coil 1 and the secondary coil 5 is very poor, which contradicts the high-coupling structure that is compatible with the recent high frequencies, and is also difficult to design. This impairs the degree of freedom of the transformer and hinders the miniaturization of isolation transformers.

Fifth, some conventional insulation transformers are inserted into the case after the coil is completed and filled with insulation resin to fill the gaps inside the transformer. are used, and the primary lead wire 9, the secondary lead wire 13, and the primary soldering part 11 are used.
．． Although the joint with the secondary soldering portion 15 is held, it cannot be said that it is securely fixed, and is weak against external shocks, particularly external stress on the pin terminal. As the market continues to diversify and become more personalized, the environment in which equipment is used is becoming increasingly harsh, and the demand for high strength transformers is also increasing.

The present invention aims to provide an isolation transformer with a new structure that solves the conventional problems as described above.

Means for Solving the Problems In order to solve the above problems, the present invention forms a primary coil by winding a conductor around a primary winding frame having primary flanges at both ends, and uses secondary flanges at both ends based on this primary coil. It has a second tsuba,
The transformer coil is completed by wrapping the conductive wire around the secondary winding frame, which covers the exposed outer periphery of the primary coil and is integrally molded with insulating plastic resin to form the secondary coil.

In addition, a primary coil is formed by winding a conductive wire around a primary winding frame with flanges at both ends and having pin terminals integrally embedded in the flanges at the lower end thereof, winding it around one of the primary terminals, wiring it, and soldering it. This primary coil is used as a base, and a secondary collar is provided at both ends.The secondary collar is integrally molded with a plastic resin that covers the primary coil, primary lead wire, and the entire exposed outer circumference of the primary pin terminal's wrapped wiring part, and insulates different coils. Next, wind the conductor around the winding frame, wrap it around the secondary terminal, and wire it.
By soldering, a secondary coil is formed and the transformer coil is completed.

Further, a conductor is wound around a primary winding frame which has flanges at both ends, pin terminals are integrally embedded in the flanges at the lower end of each frame, and is wired around one of the primary terminals, and soldered to form a primary coil. It is based on the primary coil and has secondary flanges at both ends, covering the entire exposed outer circumference of the primary coil, primary lead wire, and the wrapped wiring part of the primary pin terminal.
The secondary winding frame is integrally molded with plastic resin that insulates the different coils, and the conductor is wound around the secondary terminal, wired, and soldered to form the secondary coil. Covers the entire exposed outer circumference of the coil, secondary lead wire, and secondary terminal winding wiring to completely isolate and isolate the internal coil from the external core of magnetic material such as silicon steel or ferrite, and other metals. The outer shell of the transformer coil is formed by integrally molding the plastic resin of the same material as the plastic resin of the secondary winding frame shown above, and a magnetic material core such as silicon steel or ferrite is further inserted into this transformer coil. This is an isolation transformer.

Function As mentioned above, the secondary winding frame, which has secondary flanges at both ends, covers the exposed outer periphery of the primary coil, and insulates different coils, is integrally molded with plastic resin based on the primary coil. The work of fitting the frame can be eliminated, there is no possibility of the winding becoming loose or the conductor falling off from the winding frame due to looseness during the fitting, and the insulation between the primary coil and the secondary coil is ensured. Furthermore, the coil-to-coil dimension A between the primary coil and the secondary coil is only the thickness of the secondary winding frame, and as in the past, the coil clearance B of the primary winding frame and the fit between the primary winding frame and the secondary winding frame are There is no need to consider the mating clearance C to ensure performance, and it is possible to secure a large winding space, and the coupling between the primary and secondary coils is also very good, making it effective as a structure compatible with high frequencies. This provides a large degree of freedom in design and allows for miniaturization of the isolation transformer.

In addition, a secondary collar is provided at both ends to cover the entire exposed outer circumference of the primary coil and primary lead wire, as well as the primary pin terminal's wrapped wiring part. By integrally molding the
Needless to say, the above-mentioned effect also protects the entire exposed outer periphery of the primary lead wire and the wrapped wiring part of the primary pin terminal.
Since it is covered with an integrally molded plastic resin, there is no gap between the primary winding frame and the secondary winding frame unlike in the conventional case, and the spatial creepage distance does not exist structurally. With respect to the safety standards of each country, it is possible to meet the safety standards of each country by simply considering the thickness of the plastic resin when integrally molded, and it will be easy to support the future 200V power supply, and furthermore, to be compatible with the world. It can be said that it is a structure.

Furthermore, the outer shell of the transformer coil, which covers not only the primary coil but also the secondary coil and the secondary lead wire, as well as the entire exposed outer circumference of the winding wiring part of the secondary terminal, is By integrally molding the plastic resin of the same material as the plastic resin of the winding frame, the internal coil is completely isolated from the external core of magnetic material such as silicon steel or ferrite, and other metals, making it possible to create a transformer coil. It not only achieves reliable insulation performance on its own, but also increases the possibility of complying with the safety standards of each country. In addition, not only the primary lead wire but also the secondary lead wire, as well as the entire exposed outer periphery of the secondary terminal's wrapped wiring part, are securely fixed by integral molding of plastic resin, so the pin terminal has extremely high tensile strength and is resistant to external stress. However, it was a potential challenge for transformers. It is possible to provide an isolation transformer with no secondary disconnection defects.

Example Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an internal structural diagram of an isolation transformer showing a first embodiment of the present invention. FIG. 2 is a diagram showing the internal structure of an isolation transformer showing the second embodiment, and FIG. 3 is a diagram showing the internal structure of the isolation transformer showing the third embodiment.

In FIG. 1, a primary coil 1 is formed by winding a conducting wire such as a copper wire around a primary winding frame 2 having primary flanges 3 at both ends. This primary coil 1
A secondary winding frame 4 having a secondary flanges 6 at both ends and having a shape that covers the exposed outer peripheral part of the primary coil 1 and insulates the primary coil 1 and the secondary coil 5 is integrally molded with plastic resin. Further, a conductive wire such as a copper wire is wound around this secondary winding frame 4, and this is used as a secondary coil 5 to complete a transformer coil. Furthermore, a core 7 of a magnetic material such as silicon steel or ferrite is inserted into this transformer coil to complete an insulating transformer.

In FIG. 2, flanges are provided at both ends, and the primary lower end flanges 3 have a primary pull-out groove 8, and a primary terminal 10 made of hard copper or mild steel.
Primary winding frame 2 integrated with terminal board 16 in which secondary terminal 14 is implanted
The primary lead wire 9 is wound around the primary terminal 10 through the primary lead-out groove 8, and then soldered to form the primary coil 1. This primary coil 1 is used as a base, and flanges are provided at both ends, and the secondary lower end collar 6 has a secondary lead-out groove 12, and the primary lead wire 9 of the primary coil 1 and the primary lead-out groove 8, as well as the primary terminal 10. Covering the entire exposed part of the soldering part 11, the primary coil 1
A secondary winding frame 4 having a shape that insulates the secondary coil 5 and the secondary coil 5 is integrally molded with plastic resin. Further, a conductive wire is wound around the secondary winding frame 4, passed through the secondary lead-out groove 12, wound around the secondary terminal 14, and soldered, thereby forming the secondary coil 5 and completing the transformer coil. Furthermore, a core 7 made of a magnetic material such as silicon steel or ferrite is inserted into this transformer coil to complete an insulating transformer.

In FIG. 3, flanges are provided at both ends, the primary lower end flanges 3 have a primary extraction groove 8, and a primary terminal 10 of hard copper or annealed copper is provided.
Primary winding frame 2 integrated with terminal board 16 in which secondary terminal 14 is implanted
The primary lead wire 9 is wound around the primary terminal 10 through the primary lead-out groove 8, and then soldered to form the primary coil 1. This primary coil 1 is used as a base, and flanges are provided at both ends, and the secondary lower end collar 6 has a secondary lead-out groove 12, and the primary lead wire 9 of the primary coil 1 and the primary lead-out groove 8, as well as the primary terminal 10. Covering the entire exposed part of the soldering part 11, the primary coil 1
A secondary winding frame 4 having a shape that insulates the secondary coil 5 and the secondary coil 5 is integrally molded with plastic resin. Further, a conductive wire is wound around the secondary winding frame 4, passed through the secondary lead-out groove 12, and wound around the secondary terminal 14 for wiring, and then soldered to form the secondary coil 5 and complete the transformer coil. . Further, based on this transformer coil, a secondary coil 5, a secondary lead wire 13 of the secondary lead groove 12, and a secondary terminal 1 are further constructed.
The outer shell of the transformer coil covers the entire exposed outer periphery of the secondary soldering part 15 and completely isolates and insulates the internal coil from the external core 7 made of magnetic material such as silicon steel or ferrite, and other metals. 18 is integrally molded with the same plastic resin as that of the secondary winding frame 4 shown above. Furthermore, a core 7 made of a magnetic material such as silicon steel or ferrite is inserted into this transformer coil to complete an insulating transformer.

The present invention, which exceeds the effects of the invention, eliminates the conventional work of fitting winding frames, eliminates windings caused by looseness during fitting, and conductors falling off from the winding frame, and improves the insulation between the primary and secondary coils. It becomes certain. In addition, a large winding space can be secured, and the coupling between the primary and secondary coils is also very good, making it an effective structure for high-frequency applications.It has a large degree of freedom in design and allows for the miniaturization of isolation transformers. That is.

Further, as in the conventional case, there is no gap between the primary winding frame and the secondary winding frame, and there is no spatial creepage distance due to the structure. With respect to the safety standards of each country, it is possible to meet the safety standards of each country by simply considering the thickness of the plastic resin when integrally molded, and it will be possible to comply with the future 200V power supply and even be compatible with the world. do.

In addition, by completely insulating the internal coil from the external core of magnetic material such as silicon steel or ferrite, and other metals, we not only achieve reliable insulation performance with the transformer coil alone, but also make it more compatible with countries around the world. This will increase the possibility of complying with safety standards. In addition, not only the primary lead wire but also the secondary lead wire, as well as the entire exposed outer periphery of the secondary terminal's wrapped wiring part, are securely fixed by integral molding of plastic resin, so the pin terminal has extremely high tensile strength and is resistant to external stress. However, it is possible to provide an isolation transformer that is strong and free from secondary disconnection defects, which were a potential problem with transformers.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an isolation transformer according to a first embodiment of the present invention, and FIG. 2 is a sectional view of an isolation transformer showing a second embodiment.
FIG. 3 is a sectional view of an isolation transformer showing a third embodiment, and FIG. 4 is a sectional view of a conventional isolation transformer. 1...Primary coil, 2...Primary winding frame,
3...Primary lower end flange, 4...Secondary winding frame, 5...Secondary coil, 6...Secondary lower end flange, 7. ... Core, 8 ... Primary draw-out groove, 9 ... Primary draw-out lead wire, 10 ...
...Primary terminal, 11...Primary soldering part, 12
...Secondary draw-out groove, 13...Secondary draw-out lead wire, 14...Secondary terminal, 15...
...Secondary soldering part, 16...Terminal board, 17.
... Gap, 18 ... Transformer outer shell.

Claims (3)

[Claims] (1) A primary coil is formed by winding a conductor around a primary winding frame that has primary flanges at both ends, and the primary coil is used as a base and has secondary flanges at both ends, exposing the outer periphery of the primary coil. The secondary winding frame is integrally molded with insulating plastic resin,
An isolation transformer is constructed by winding conductive wire to form a secondary coil to form a transformer coil, and incorporating a core into this. (2) By winding the conductor around a primary winding frame with flanges at both ends and having pin terminals embedded in the lower flanges, the lead wire is wound around the primary terminal, wired, and soldered. A primary coil is formed, and this primary coil is used as a base, and secondary flanges are provided at both ends to cover the entire exposed outer circumference of the primary coil, primary lead wire, and the wrapped wiring part of the primary pin terminal, and are integrated with insulating plastic resin. An insulating transformer is made by winding a conductive wire around a molded secondary winding frame, wrapping it around a secondary terminal, wiring it, and soldering it to form a secondary coil to form a transformer coil, into which a core is assembled. (3) The transformer coil is used as a base, and the secondary coil and secondary lead wires are covered, as well as the entire exposed outer circumference of the winding wiring part of the secondary terminal, and the internal coil is connected to a core made of a magnetic material such as silicon steel or ferrite, or an external metal. 3. The insulating transformer according to claim 2, wherein the outer shell of the transformer coil is integrally molded with the same plastic resin as the plastic resin of the secondary winding frame which completely isolates and insulates the secondary winding frame.