JP2006032589A - Transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transformer in which the number of assembling steps is reduced and a connection reliability is insured without damaging a coupling level. <P>SOLUTION: A pair of mixed conductor wires 13 are constituted by juxtaposing a primary coil conductor wire 11 to a secondary coil conductor wire 12. The mixed conductor wires 13 are configured such that they are wound to form a multi-layer in alignment by folding back in a zigzag condition, and also to form a primary coil 14 composed of the helical primary coil conductor wire 11 and a secondary coil 15 composed of the helical secondary coil conductor wire 12. The transformer can insure the number of assembling steps and a connection reliability without damaging the coupling level, and this transformer can be adapted to one to be used for various electronic apparatuses, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transformer used in various electronic devices.

  A conventional transformer will be described below with reference to the drawings.

  FIG. 6 is a plan view of a conventional transformer, and FIG. 7 is a sectional view of the transformer.

  6 and 7, the conventional transformer includes a primary coil 3 and a secondary coil 4 alternately formed by spirally winding a primary coil conductor 1 and a secondary coil conductor 2 in a plane. The ends of the primary coils 3 stacked in a plurality of layers are connected to each other, and the ends of the secondary coils 4 stacked in the plurality of layers are connected to each other (not shown). Each end is connected in parallel or in series according to the specifications.

  Further, the leading ends of the primary coil 3 and the secondary coil 4 connected to each other are drawn out from the inner peripheral side and the outer peripheral side as lead wires 5, and a connecting portion 6 for terminal connection is provided at the leading end.

  Further, two E-type magnetic cores 8 are inserted and combined in the through-holes 7 at the center of the laminated primary coil 3 and secondary coil 4 to form a closed magnetic path-shaped magnetic core 9.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
Japanese Unexamined Patent Publication No. 7-135117

  In the above configuration, since the primary coil 3 and the secondary coil 4 are alternately laminated in a plurality of layers, although the degree of coupling is good, the lead wires 5 of the primary coil 3 drawn from each layer are connected to each other, and The lead wires 5 of the next coil 4 also need to be connected to each other, and there are problems that the number of assembling steps is increased and the connection reliability associated with the connection of each lead wire 5 must be ensured.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to provide a transformer that can reduce assembly man-hours and ensure connection reliability without impairing the degree of coupling.

  In order to solve the above-described problems, the present invention particularly relates to a spiral winding of a set of mixed conductors in which a primary coil conductor and a secondary coil conductor are arranged in parallel while being folded back in a zigzag manner. It is the structure which formed the primary coil which consists of the said conducting wire for primary coils, and the secondary coil which consists of the spiral said conducting wire for secondary coils.

  According to the above configuration, a set of mixed conductors in which a primary coil conductor and a secondary coil conductor are arranged in parallel are arranged in multiple layers while being folded back in a zigzag manner, thereby forming a spiral primary coil conductor. Since the primary coil and the secondary coil composed of the spiral secondary coil conductor are formed, the primary coil and the secondary coil have a cross-sectional shape in which the primary coil conductor and the secondary coil conductor are respectively spiral. The cross-sectional shape of the primary coil and the secondary coil, which are wound in a plane and alternately stacked, is substantially the same.

  That is, since the primary coil and the secondary coil have cross-sectional shapes that are alternately stacked, the coupling degree is not impaired, and the lead wires of the primary coil and the secondary coil are only at the start and end of winding. There is no need to connect a plurality of lead wires to each other, the number of assembly steps can be reduced, and connection reliability can be ensured.

  In particular, the primary coil and the secondary coil are alternately stacked by winding a set of mixed conductors in which a primary coil conductor and a secondary coil conductor are arranged in parallel while winding them in multiple layers while folding them in a zigzag manner. Therefore, the potential difference between the adjacent primary coil conductor and the secondary coil conductor is small, and a short circuit can be suppressed.

  Hereinafter, a transformer according to an embodiment of the present invention will be described with reference to the drawings.

  1 is a cross-sectional view of a transformer according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view showing a winding procedure of a mixed conducting wire in part A of FIG. 1, FIG. 3 is a perspective view of the transformer, and FIG. FIG.

  1 and 2, the transformer according to one embodiment of the present invention includes a multi-layered structure in which a pair of mixed conductors 13 in which a primary coil conductor 11 and a secondary coil conductor 12 are arranged in parallel are folded back in a zigzag manner. The primary coil 14 composed of the spiral primary coil conductor 11 and the secondary coil 15 composed of the spiral secondary coil conductor 12 are formed. When aligned winding is performed in this way, the primary coil lead wire 11 and the secondary coil lead wire 12 are each spirally wound in a plane and each of the primary coil 14 and the secondary coil 15 are stacked in an alternating manner and have substantially the same cross-sectional shape. It becomes a shape. The primary coil conductor used here is an insulated conductor, and the secondary coil conductor is a three-layer insulated wire.

  Two sets of the mixed conducting wires 13 are used, and each of the mixed conducting wires 13 is wound into a folded shape (in the direction of the arrow in FIG. 2) and is completely aligned and wound in multiple layers, and the coil portion 16 composed of the primary coil 14 and the secondary coil 15 is arranged in two. A pair is formed. At this time, the primary coil lead wire 11 and the secondary coil lead wire 12 aligned and wound in adjacent upper and lower layers are brought into close contact with each other as a self-bonding wire.

  Further, the conductor length of the primary coil conductor 11 is made longer than the conductor length of the secondary coil conductor 12, and a portion 17 of the primary coil conductor 11 exceeding the conductor length of the secondary coil conductor 12 It is wound so as to face 15.

  Further, the primary coil lead wire 11 and the secondary coil lead wire 12 are wound around a bobbin 22 having a through hole, and the middle magnetic leg 19 of the E-type magnetic core 18 is inserted into the through hole, and the gap The middle magnetic leg 19 and the outer magnetic leg 20 are brought into contact with the I-type magnetic core 25 through the paper 24 and bonded with an adhesive 26 to form a closed magnetic path-shaped magnetic core 21.

  As shown in FIGS. 3 and 4, the primary coil 14 and the secondary coil 15 configured as described above are combined so as to be sandwiched between an E-type magnetic core 18, an I-type magnetic core 25, a bobbin 22, and a lid portion 23.

  With the above configuration, a set of mixed conducting wires 13 in which the primary coil conducting wire 11 and the secondary coil conducting wire 12 are arranged in parallel are aligned and wound in multiple layers while being folded back in a zigzag manner to form a spiral primary coil conducting wire 11. Are formed, and the secondary coil 15 formed of the spiral secondary coil conductor 12 is formed, the cross-sectional shapes of the primary coil 14 and the secondary coil 15 are the same as the primary coil conductor 11 and the secondary coil 15. The coil lead wires 12 are spirally planarly wound and planarly wound to form a primary coil 14 and a secondary coil 15 that are substantially equivalent in cross-sectional shape.

  That is, since the primary coil 14 and the secondary coil 15 have cross-sectional shapes that are alternately stacked, the degree of coupling is not impaired, and the lead wires 24 of the primary coil 14 and the secondary coil 15 Since it is only at the end, there is no need to connect the plurality of lead wires 24 to each other, and the number of assembly steps can be reduced and connection reliability can be ensured.

  In particular, the primary coil 14 and the secondary coil 15 are formed by aligning and winding a set of mixed conducting wires 13 in which a primary coil conducting wire 11 and a secondary coil conducting wire 12 are arranged in parallel while being folded back in a zigzag manner. As a result, the cross-sectional shapes are alternately laminated, so that the potential difference between the adjacent primary coil conductor 11 and secondary coil conductor 12 is small, and a short circuit can be suppressed. Simply, when the primary coil 14 and the secondary coil 15 are alternately laminated in a plurality of layers, there is a potential difference between the winding start portion of the primary coil conductor 11 and the winding start portion of the secondary coil conductor 12 in the adjacent layers. Since it is very different, there is a risk of short circuit.

  In addition, since the primary coil conductor 11 is an insulated conductor and the secondary coil conductor 12 is a three-layer insulated wire, the insulation resistance is improved, the insulation distance can be reduced, and the transformer can be miniaturized. Whether to use an insulated conductor or a three-layer insulated wire for the primary coil conductor 11 and the secondary coil conductor 12 may be selected depending on the specifications. Insulation resistance can be improved.

  Further, the mixed conducting wire 13 is completely aligned and the primary coil conducting wire 11 and the secondary coil conducting wire 12 aligned and wound in adjacent upper and lower layers are brought into close contact with each other, so that the degree of coupling is further improved. Can do. At this time, by making any one of the primary coil lead wire 11 and the secondary coil lead wire 12 a self-bonding wire, complete winding can be easily achieved.

  Furthermore, a plurality of sets of mixed conducting wires 13 are wound in a multi-layered manner while being folded back in a zigzag manner to form a plurality of sets of coil portions 16 composed of a primary coil 14 and a secondary coil 15, so that various specifications can be met. Winding can be applied.

  In one embodiment of the present invention, of the primary coil conductor 11 and the secondary coil conductor 12, the conductor length of the primary coil conductor 11 is made longer than the conductor length of the secondary coil conductor 12, A part 17 of the primary coil conductor 11 exceeding the conductor length of the secondary coil conductor 12 is wound so as to face the secondary coil conductor 12, but as shown in FIG. 5, the primary coil conductor 11 is wound. The primary coil conductor 11 is made substantially equal to the conductor length of the secondary coil conductor 12, and the new primary coil conductor 11 is connected to the primary coil conductor 11 so that the new primary coil conductor 11 is connected to the secondary coil 11. You may wind so that it may oppose with the conducting wire 12 for coils.

  Further, a part 17 of the primary coil conductor 11 may be wound as it is around the outer periphery of the coil portion 16 composed of the primary coil conductor 11 and the secondary coil conductor 12.

  As described above, the transformer according to the present invention can ensure assembly man-hours and connection reliability without impairing the degree of coupling, and can be applied to transformers used in various electronic devices and the like.

Sectional drawing of the transformer in one embodiment of the present invention The expanded sectional view which shows the winding procedure of the mixed conducting wire in the A section of FIG. Perspective view of the transformer Exploded perspective view of the transformer An exploded perspective view of a transformer in another embodiment Plan view of conventional transformer Cross section of the transformer

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Conductor for primary coil 12 Conductor for secondary coil 13 Mixed conductor 14 Primary coil 15 Secondary coil 16 Coil part 17 Part 18 E type magnetic core 19 Middle magnetic leg 20 Outer magnetic leg 21 Closed magnetic path-like magnetic core 22 Bobbin 23 Lid 24 Gap paper 25 Type I magnetic core 26 Adhesive

Claims (6)

A set of mixed conductors in which a primary coil conductor and a secondary coil conductor are arranged in parallel are wound in a multi-layered manner while being folded back in a zigzag manner to form a primary coil and a spiral formed of the spiral primary coil conductor. A transformer formed with a secondary coil made of the secondary coil conductor. 2. The transformer according to claim 1, wherein the mixed conducting wire is completely aligned and the primary coil conducting wire and the secondary coil conducting wire aligned and wound in adjacent upper and lower layers are in close contact with each other. The transformer according to claim 2, wherein one of the primary coil conductor and the secondary coil conductor is a self-bonding wire. 2. The transformer according to claim 1, wherein a plurality of sets of the mixed conducting wires are aligned and wound in multiple layers while being folded in a zigzag manner to form a plurality of sets of the primary coil and the secondary coil. Of the primary coil conductor and the secondary coil conductor, one conductor is made longer than the other conductor, and a part of one conductor exceeding the other conductor is opposed to the other conductor. The transformer according to claim 1, which is wound around. The transformer according to claim 1, wherein at least one of the primary coil conductor or the secondary coil conductor is a three-layer insulated wire.

Images