JPH0587921U - Coil, transformer and line filter - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an inexpensive product that has high insulation performance safety, is easy to manufacture, and has a short creepage distance and a large amount of metal wire winding. [Structure] An electric wire 48 is wound around a bobbin 44, and a metal wire provided with a plurality of insulating coating layers is used as the electric wire 48. Therefore, in the coil 42 and the transformer, conventionally used members such as an insulating interlayer tape, a barrier tape, and a tube can be omitted, and in the line filter, an insulating tube, a bobbin partition wall, and the like can be omitted. Further, in the line filter, if the first winding and the second winding wound around the bobbin are evenly mixed, each Q of the winding can be increased, and then these Qs can be brought close to 1: 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coil formed by winding an electric wire around a bobbin, a transformer, and a line filter.

[0002]

[Prior Art]

 Conventionally, each component such as a coil, transformer, and line filter has a winding structure in which an electric wire is wound around a bobbin many times, and a polyurethane enameled wire is used as the electric wire for the winding to miniaturize the component. ing. Incidentally, polyurethane enameled wire is a copper wire with a single layer of polyurethane coating.

FIG. 11 shows a partial sectional structure of such a choke coil. In the figure, 10 is a bobbin, 12 is a winding made of polyurethane enamel wire wound on the bobbin 10, and 14 (14a, 14b) are two E-shaped iron cores mounted on the bobbin 10. 16 is an insulating outer tape that covers the outside of the winding wire 12, 18 is an insulating interlayer tape that is interposed between the layers of the winding wire 12, and 20 is an upper and lower surface of the winding wire 12. This is an insulating barrier tape for increasing the surface distance and obtaining a high breakdown voltage.

FIG. 12 shows a partial sectional structure of a transformer. In the figure, 22 is a bobbin, 23 (23a, 23b), 24 (24a, 24b) are two sets of primary and secondary windings made of polyurethane enameled wire attached to the bobbin 22, and 26 (26a, 26b) are Two E-shaped iron cores are further attached to the bobbin 22. However, on the bobbin 22, the primary windings 23a and 24a and the secondary windings 23b and 24b are wound in this order from the inner side to the outer side. Further, 28 is an insulating outer tape that covers the outside of the windings 23 and 24 wound in multiple layers, 30 is an insulating interlayer tape interposed between the respective layers, and 32 is a high withstand voltage for increasing the creeping distance between the layers. Is a barrier tape for insulation for obtaining.

FIG. 13 shows a partial sectional structure of the line filter. In the figure, 34 is a bobbin, 36 and 37 are first and second windings made of polyurethane enameled wire wound around the bobbin, and 38 (38a, 38b) are two U-shaped iron cores mounted on the bobbin 34. .. However, the first winding 36 is arranged on the upper side of the partition wall 40 of the bobbin 34, and the second winding 37 is arranged on the lower side thereof to lengthen the creepage distance in order to obtain a high withstand voltage and increase the insulation performance. To do. An insulating tube is fitted to each of the lead-out ends of the choke coil, the transformer, and the windings 12, 23, 24, 36, 37 of the line filter.

[0006]

[Problems to be solved by the device]

 However, since the polyurethane enameled wire has a single coating, pinholes are easily formed in the coating during manufacturing and handling, and the insulation performance is low in reliability. Therefore, in the choke coil and the transformer, insulating interlayer tapes 18 and 30 are interposed between the respective layers of the windings 12, 23 and 24, and insulating barrier tapes 20 and 32 are arranged on the upper and lower surfaces thereof. Safety is improved by fitting an insulating tube to each drawer end.

Further, in the line filter as well, the partition wall 40 is provided between the first and second windings 36 and 37 which are respectively interposed in the different pole lines, and the creepage distance between the core 38 and the iron core 38 is also increased. Safety is enhanced by fitting an insulating tube to the drawer end. In the line filter, the primary winding 36 and the secondary winding 37 are separately wound on the bobbin 34 with the partition wall 40 as a boundary. It is difficult to approach each Q of 37 to 1: 1.

The present invention has been made in view of such conventional problems. Even if the creepage distance is short and the winding amount of the metal wire is large, the safety against insulation performance is high and the manufacturing is easy. The objective is to provide easy, inexpensive coils, transformers, and line filters.

[0009]

[Means for Solving the Problems]

 To achieve the above object, the coil 42 according to the present invention is constructed by winding an electric wire 48 around a bobbin 44. Then, as the electric wire 48, a metal wire 58 provided with a plurality of insulating coating layers 54 and 56 is used.

Further, the transformer 64 is configured by mounting an iron core 74 on a bobbin 66 around which an electric wire 75 is wound. Then, as the electric wire 75, a metal wire 58 provided with a plurality of insulating coating layers 54 and 56 is used.

The line filter 80 is also constructed by mounting the iron core 88 on the bobbin 82 around which the electric wire 89 is wound. Then, as the electric wire 89, a metal wire 58 provided with a plurality of insulating coating layers 54 and 56 is used.

[0012]

[Action]

 When the metal wire 58 having the plurality of insulating coating layers 54, 56 is used as the electric wires 48, 75, 89 wound around the bobbins 44, 66, 82, respectively, as described above, the electric wires 48, 75, 89 are used. The insulation performance of is much higher than that of a single layer, which makes it easier to construct products with high safety. When a plurality of insulating coating layers 54 and 56 are provided, even if a pinhole is formed in one insulating coating 54 or 56 during the production of the electric wires 48, 75 and 89, the pinhole will not be covered by the other insulating coating 56 or 54. Even if a pinhole is formed during handling, the pinhole is usually formed only on the outer insulating coating layer 56 and is difficult to form on the inner insulating coating layer 54.

Therefore, in the coil 42 and the transformer 64, the conventionally used insulating interlayer tapes 18 and 30, the barrier tapes 20 and 32, members such as tubes are omitted, the creepage distance is short, and the metal wire 58 is wound. The dose can be increased. It should be noted that if a plurality of insulating coating layers are used, the thickness of the coating tends to increase. Therefore, in order to increase the winding amount of the metal wire, it is preferable that the number of layers is small, and it is particularly preferable to use two layers.

Further, in the line filter 80, the insulating tube, the partition wall 40 of the bobbin and the like can be omitted to shorten the creepage distance and increase the winding amount of the metal wire. Furthermore, when the first and second windings 84 and 86 wound around the bobbin 82 are mixed evenly, the Q of each of the windings 84 and 86 is increased, and then the Qs thereof are brought close to 1: 1. be able to.

If the types of members used are reduced and the structure is simplified as described above, naturally the coil 42, the transformer 64, and the line filter 80 are easily manufactured, and the product is inexpensive.

[0016]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view showing a state in which a part of an insulating outer tape of a choke coil to which the present invention is applied is removed, and FIG. 2 is an electric circuit diagram thereof. In the figure, 42 is a coil, 44 is a bobbin which is a substantially symmetrical front-back symmetrical base of the coil 42, 46 is a winding consisting of an electric wire 48 wound many times around the bobbin 44, and 50 is an insulating material for covering the outside of the winding 46. The outer tape, 52 (52a, 52b), is two E-shaped iron cores further attached to the bobbin 44.

As the electric wire 48 forming the winding 46, a copper wire 58 having two layers of Teflon coatings 54 and 56 as shown in FIG. 3 is used. Then, since the insulating film-forming layers 54 and 56 are present on the outer side of the copper wire 58, even if a pinhole is formed in one insulating coating 54 or 56 during the production of the electric wire 48, the pinhole is not formed. Is closed by another insulating coating 56 or 54. Alternatively, even if a pinhole is formed during handling, the pinhole is usually formed only on the outer insulating coating layer 56 to which an external force directly acts, and is difficult to form on the inner insulating coating layer 54. Therefore, the insulation performance of the electric wire 48 is significantly higher than that of the one-layer insulation film, and the four-layer insulation films 54 and 56 are interposed between the adjacent copper wires 58. Both ends of the winding 46 are connected to only two terminal pins 60 and 62 among a large number of terminal pins protruding from the lower portion of the bobbin 44, except for the insulating coating layers 54 and 56. Of course, it is not necessary to attach the insulating tube used in the past.

FIG. 4 is an enlarged partial vertical sectional view showing a right side main part of such a choke coil. As is clear from this figure, when the copper wire 58 provided with the two-layer insulation coatings 54 and 56 is used as the electric wire 48, the conventionally used insulating interlayer tape 18 and barrier tape 20 are omitted, and the creepage distance is reduced. In short, the inductance can be increased by increasing the winding amount of the copper wire 58. It should be noted that if a plurality of insulating coating layers are used, the thickness of the coating tends to increase, and therefore, the number of layers should be as small as possible in order to increase the winding amount of the copper wire, and it is particularly preferable to use two layers.

FIG. 5 is a front view showing a state in which a part of the insulating outer tape of the transformer to which the present invention is applied is removed, and FIG. 6 is an electric circuit diagram thereof. In the drawing, 64 is a transformer, 66 is a bobbin which is a substantially symmetrical front-back symmetry which is a base of the transformer 64, 68 (68a, 68b) and 70 (70a, 70b) are two sets of primary and secondary windings mounted on the bobbin 66. A wire 72 is an insulating outer tape that covers the outside of the windings 68 and 70, and 74 (74a, 74b) is two E-shaped iron cores further attached to the bobbin 66. The bobbin 66 is wound from the inner side to the outer side in such a manner that the primary windings 68a and 70a and the secondary windings 68b and 70b are stacked in this order.

As the electric wires 75 forming the windings 68 and 70, copper wires 58 provided with two layers of Teflon coatings 54 and 56 as shown in FIG. 3 are used. Then, since the insulation performance of the electric wire is large, the insulating interlayer tape 30, the barrier tape 32, the tube, etc., which have been conventionally used, can be omitted, the creepage distance can be shortened, and the winding amount of the copper wire 58 can be increased.

FIG. 7 is an enlarged partial vertical sectional view showing a right side main part of such a transformer. Comparing the transformer 64 and the choke coil 42, only the numbers of the windings 46, 68 and 70 wound around the bobbins 44 and 66 are different, and the other structures are substantially the same. Both ends of each primary winding 68a, 70a are connected to terminal pins 76, 78, etc. on the front side of the bobbin 66, respectively, and both ends of each secondary winding 68b, 70b are connected to its back side. Connect the same to a terminal pin.

FIG. 8 is a front view of a line filter to which the present invention is applied, and FIG. 9 is an electric circuit diagram thereof. In the figure, 80 is a line filter, 82 is a substantially front-back symmetrical bobbin which is the base of the line filter 80, 84 and 86 are the first and second windings mounted on the bobbin 82, and 88 (88a, 88b) is the bobbin 82. Two U-shaped iron cores attached to the. The first and second windings 84 and 86 are respectively provided in the different pole lines.

As the electric wire 89 forming the first and second windings 84 and 86, a copper wire 58 provided with two layers of Teflon coatings 54 and 56 as shown in FIG. 3 is used. Then, since the electric wire 89 has high insulation performance, the insulating tube, the wall for partitioning the first and second windings 84, 86 of the bobbin 82, and the like can be omitted. Therefore, the creepage distance can be shortened and the winding amount of the copper wire 58 can be increased.

FIG. 10 is an enlarged partial vertical sectional view showing the right side main part of such a line filter. As shown in the figure, when two electric wires forming the first and second windings 84 and 86 are arranged side by side and wound around the bobbin 82 at the same time, the first and second windings 84 and 86 are mixed evenly. The Qs of the windings 84 and 86 can be increased and then the Qs of the windings 84 and 86 can be brought close to 1: 1. It should be noted that each one end of the first and second windings 84 and 86 is hooked on each of the protrusions 90 and 92 provided on the front side upper portion of the bobbin 82, and then connected to the terminal pins 94 and 96 to each other end. Is similarly connected to the terminal pin on the back side.

If the types of members to be used are reduced and the structure is simplified as described above, the choke coil 42, the transformer 64, and the line filter 80 are naturally easy to manufacture, and the product is inexpensive.

When a winding is formed by using a copper wire having a two-layer insulating film, the transformer cannot be used by directly connecting it to a commercial power source of 100 V due to the limitation of the standard. Can be used on the secondary side.

[0027]

[Effects of the Invention] According to the present invention described above, since a metal wire provided with a plurality of insulating coating layers is used as an electric wire for winding, the insulation performance of the electric wire is increased and a highly safe product can be obtained. You can In coils and transformers, conventionally used insulating interlayer tapes, barrier tapes, tubes, and other members can be omitted to shorten the creepage distance and increase the winding amount of metal wires.

Further, in the line filter, the conventionally used insulating tube, the partition wall of the bobbin and the like can be omitted to shorten the creepage distance and increase the winding amount of the metal wire. Further, by uniformly mixing the first and second windings wound around the bobbin, it is possible to increase each Q of the windings and bring those Qs close to 1: 1. Moreover, if the types of members used are reduced and the structure is simplified, the manufacturing of each coil, the transformer, and the line filter becomes easier, and the product becomes cheaper.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a part of an insulating outer tape of a choke coil to which the present invention is applied is removed.

FIG. 2 is an electric circuit diagram of the choke coil.

FIG. 3 is a perspective view showing a structure of an electric wire forming a winding of the choke coil.

FIG. 4 is an enlarged partial vertical cross-sectional view showing a right side main part of the choke coil.

FIG. 5 is a front view showing a state in which a part of the insulating outer tape of the transformer to which the present invention is applied is removed.

FIG. 6 is an electric circuit diagram of the transformer.

FIG. 7 is an enlarged partial vertical sectional view showing a right side main part of the transformer.

FIG. 8 is a front view of a line filter to which the present invention is applied.

FIG. 9 is an electric circuit diagram of the line filter.

FIG. 10 is an enlarged partial vertical sectional view showing a right side main part of the line filter.

FIG. 11 is an enlarged partial vertical sectional view showing a right side main part of a conventional choke coil.

FIG. 12 is an enlarged partial vertical sectional view showing a right side main part of a conventional transformer.

FIG. 13 is an enlarged partial vertical sectional view showing a right side main part of a conventional line filter.

[Explanation of symbols]

42 ... Choke coil 44, 66, 82 ... Bobbin 4
6, 68, 70, 84, 86 ... Winding 48, 75, 89
… Electric wires 50, 72… Exterior tapes 52, 74, 88…
Iron core 54, 56 ... Teflon coating layer 58 ... Copper wire 6
0, 62, 76, 78, 94, 96 ... Terminal pins 64 ...
Transformer 80 ... Line filter

Claims (3)

[Scope of utility model registration request] 1. A coil obtained by winding an electric wire around a bobbin, wherein a metal wire provided with a plurality of insulating coating layers is used as the electric wire. 2. A transformer in which an iron core is mounted on a bobbin wound with an electric wire, wherein a metal wire provided with a plurality of insulating coating layers is used as the electric wire. 3. A line filter in which an iron core is mounted on a bobbin wound with an electric wire, wherein a metal wire provided with a plurality of insulating coating layers is used as the electric wire.