JP2006128735A - High voltage generating insulation transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a manufacturing cost by decreasing the number of parts. <P>SOLUTION: A high voltage generating insulation transformer comprises a bobbin 10 with flanges 12, 13, 14, and 15 incorporating a core CA, primary winding L1 on the bobbin 10, an insulation layer 21 formed with an insulative string member, and secondary winding L2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insulation transformer for generating high voltage that can reduce the manufacturing cost by minimizing the number of components.

  A transformer for generating a high voltage for ignition is incorporated in a gas range or an instantaneous water heater.

  This is formed by combining a cylindrical first bobbin around which a primary winding is wound and a second bobbin around which a secondary winding is wound. That is, the first bobbin has a primary winding wound around the outer periphery, a core of ferrite or the like is inserted therein, and is inserted into the cylindrical portion of the second bobbin so that the primary winding is in the secondary winding. And the primary and secondary windings can be insulated via the second bobbin.

  In such a conventional technique, since the transformer is formed by combining the first and second bobbins, the number of parts is large, and it is necessary to assemble the first and second bobbins manually. Therefore, there is a problem that it is difficult to reduce the manufacturing cost.

  Therefore, in view of the problems of the prior art, an object of the present invention is to provide an insulating layer formed of an insulating thread material between the primary and secondary windings on a common bobbin, thereby reducing the number of components. It is an object of the present invention to provide an insulating transformer for generating high voltage that can reduce the manufacturing cost by minimizing the manufacturing cost.

  In order to achieve this object, the structure of the present invention includes a bobbin that forms a winding space between flanges at both ends and an intermediate part of a cylindrical part that incorporates a core, a primary winding that is sequentially formed on the bobbin, and an insulating layer. The secondary winding is divided into all winding spaces on the bobbin, and the primary winding is part of the winding space on the low potential side of the secondary winding. The insulating layer interposed between the primary and secondary windings is formed of an insulating thread material, and each flange has a passage reaching from the outer periphery to the outer periphery of the cylindrical portion. Form a notch on the flange of one end where the terminal of the secondary winding and the terminal on the low potential side of the secondary winding are cut out and groove the surface of the flange on the other end where the terminal on the high potential side of the secondary winding is provided The gist is that the primary and secondary windings are sealed together with an insulating layer through a sealing material. .

  The yarn material can be a multifilament yarn, the insulating layer can be formed in a winding space around which only the secondary winding is wound, and the yarn material is a primary and secondary winding attached to the bobbin. Winding can be started and fixed at the end of the wire.

  Moreover, you may form a groove-shaped channel | path so that the outer periphery of a cylinder part may be contact | connected.

  According to the configuration of the invention, the insulating thread material forms an insulating layer between the primary and secondary windings on the bobbin. Therefore, the primary and secondary windings can be sealed together with the insulating layer through the sealing material, thereby obtaining a predetermined insulation strength through the insulating layer impregnated with the sealing material. The primary, secondary winding, and insulation layer are formed with high efficiency by using a winding machine and winding them around the bobbin in the order of the primary winding wire, thread material, and secondary winding wire. can do. As the thread material, it is preferable to use polymer compound fibers having good electrical insulation properties such as polyester fibers, polyamide fibers, polyurethane fibers, and polyether fibers. Moreover, as a sealing material, thermosetting resins, such as an epoxy resin, a phenol resin, and a urethane resin, are suitable, for example.

  By using multifilament yarn, the yarn material can be easily impregnated with the seal material between the filaments when sealed through the seal material, preventing the generation of voids and stable high-quality insulating layer Can be made. The yarn material is preferably used as a non-twisted yarn having a fineness of about 50 to 1000 denier by arranging several to several thousand filaments in parallel. The fineness of about 150 to 500 denier is easy to handle. However, the multifilament yarn may be a sweet twist yarn having a large twist pitch.

  When the primary winding is disposed on the low potential side of the secondary winding, it is not necessary to make the insulating layer between the primary and secondary windings thicker than necessary.

  It is not necessary to form a special fixing portion on the bobbin by fixing the thread material at the terminals for primary and secondary windings attached to the bobbin and fixing the end of the winding.

  The passage from the outer periphery of the flange to the outer periphery of the cylindrical portion can be introduced between the flanges without drawing the wire material of the primary winding, the thread material, and the wire material of the secondary winding to the outer periphery of the flange. When the air is filled and sealed, the air in the primary and secondary windings and the insulating layer is quickly discharged, and the generation of voids due to the remaining air can be prevented. The passage may be formed by partially cutting the flange, or may be formed in a groove shape on the surface of the flange.

  As described above, according to the present invention, an insulating layer formed of an insulating thread material is interposed between primary and secondary windings on a common bobbin, so that the insulating layer is primary, Like the secondary winding, it can be formed using a winding machine and sealed together with the primary and secondary windings via a sealing material to obtain a predetermined insulation strength. There is an excellent effect that the manufacturing cost can be greatly reduced by minimizing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The high-voltage generating insulating transformer includes a bobbin 10 incorporating a core CA, a primary winding L1 on the bobbin 10, a secondary winding L2, and an insulating layer interposed between the primary and secondary windings L1 and L2. 21 and 21 (FIGS. 1 and 2).

  In the bobbin 10, flanges 12 and 13 at both ends and flanges 14 and 15 at intermediate portions are integrally formed with the cylindrical portion 11 by a plastic resin such as polycarbonate. That is, the bobbin 10 is divided into a plurality of winding spaces Si (i = 1, 2,...) In the axial direction of the cylindrical portion 11 between the flanges 12 and 13 at both ends via the flanges 14 and 15 at the intermediate portion. . The cylindrical portion 11 has an inner diameter corresponding to the core CA of a ferromagnetic material such as ferrite, and ribs 11a, 11a,... Are formed on the inner surface of one end portion in the axial direction. The cylindrical portion 11 holds the core CA via the ribs 11a, 11a, ... by inserting the core CA along the axis C.

  In the flange 12, notched passages 12a and 12b that reach the outer periphery of the cylindrical portion 11 from the outer periphery are formed on both sides of the cylindrical portion 11 (FIGS. 1 and 3A). 3 (A), (B), (C), and (D) are cross-sectional views corresponding to arrows A, BB, CC, and DD in FIG. 2, respectively. is there.

  Downward prism-shaped fixing portions 12c, 12d, and 12e are formed in parallel on the outer surface of the flange 12, and the fixing portions 12c and 12d on the side of the passage 12a have terminals T1a for the primary winding L1, T1b protrudes downward. Further, a terminal T2a for the secondary winding L2 projects downward from the fixed portion 12e on the passage 12b side. A guide portion 12e1 connected to the lower portion of the passage 12b is formed upward in the fixed portion 12e, and an oblique guide groove 12e2 is formed from below the passage 12b toward the terminal T2a.

  The intermediate flanges 14 and 15 are formed in a disc shape (FIGS. 1, 3B, and 3C). In the flange 14, a passage 14 a having the same shape as the passage 12 b is formed at the same position as the passage 12 b of the flange 12, and the passage 14 a reaches the outer periphery of the cylindrical portion 11. Further, groove-like passages 14 b and 14 b are continuously formed in the flange 14 on the flange 15 side so that the passages 14 b and 14 b are in contact with the outer periphery of the cylindrical portion 11 from the outer periphery of the flange 14. Has reached. The cylindrical portion 11 is formed so that the outer periphery bulges to one side in a substantially elliptical shape between the flanges 12 and 14, and the bulged portion of the cylindrical portion 11 has a passage 12 b of the flange 12 and a passage 14 a of the flange 14. An upward groove 11b that communicates with each other is formed in the axial direction. Moreover, the shallow groove | channel 11c connected to the channel | path 12a is formed in the cylinder part 11 in the axial direction on the other side of the groove | channel 11b.

  A notch-shaped passage 15a is formed in the flange 15 at the same position as the passage 14a of the flange 14 (FIGS. 1 and 3C). One end of the passage 15 a is open to the outer periphery of the flange 15, and the bottom portion of the passage 15 a is such that the flange 14 side has a depth to the middle portion of the flange 15, and the flange 13 side reaches the outer periphery of the cylinder portion 11. Is formed obliquely (FIG. 2). In addition, groove-shaped passages 15b and 15b that reach the flange 15 so as to be in contact with the outer periphery of the cylindrical portion 11 are formed continuously on the flange 13 side in the vertical direction (FIG. 3C).

  A fixing portion 13a is formed on the outer surface of the flange 13 (FIGS. 1 and 3D), and a terminal T2b for the secondary winding L2 penetrates the fixing portion 13a vertically. Further, on the flange 15 side of the flange 13, groove-shaped passages 13b, 13b,. The passages 13b, 13b... Reach from the outer periphery of the flange 13 so as to be in contact with the outer periphery of the cylindrical portion 11.

  The primary winding L1 and the secondary winding L2 are separately wound on the cylindrical portion 11 via the flanges 14 and 15 between the flanges 12 and 13 of the bobbin 10 (FIGS. 2 and 4).

  In the primary winding L1, coils L1a and L1c are formed in the winding space S1, and a coil L1b is formed in the winding space S2. The winding start of the coil L1a is connected to the terminal T1a, and the coils L1a, L1b, and L1c are connected in series in this order. The coil L1c is formed by being laminated on the coil L1a, and the end of winding of the coil L1c is connected to the terminal T1b. The secondary winding L2 has a coil L1c and a coil L2a formed on the insulating layer 21 in the winding space S1, a coil L1b and a coil L2b formed on the insulating layer 21 in the winding space S2, and A coil L2c is formed on the cylindrical portion 11. The coils L2a, L2b, and L2c are connected in series in this order. The winding start of the coil L2a is connected to the terminal T2a, and the winding end of the coil L2c is connected to the terminal T2b.

  The insulating layers 21 and 21 are interposed between the primary winding L1 and the secondary winding L2. That is, the insulating layers 21 and 21 are interposed between the coils L1c and L2a of the primary and secondary windings L1 and L2 and between the coils L1b and L2b, respectively.

  The primary winding L1, the secondary winding L2, and the insulating layers 21 and 21 are formed as follows.

  That is, the wire C1 of the primary winding L1 is fixed to the terminal T1a at the start of winding (FIG. 5A), guided to the winding space S1 through the passage 12a of the flange 12, and along the outer periphery of the cylindrical portion 11. A coil L1a is formed by winding (in the direction of the arrow in the figure), guided to the winding space S2 through the passage 14a of the flange 14, and wound so as to reciprocate in the axial direction along the outer periphery of the cylindrical portion 11 in the winding space S2. The coil L1b is formed (FIG. 5B), guided to the winding space S1 through the passage 14a of the flange 14, the coil L1c is formed on the coil L1a, and the flange is connected to the winding start side through the common passage 12a. 12 is led to the outside and fixed to the terminal T1b.

  Next, the yarn material Y of the insulating layers 21 and 21 is fixed at the start of winding to the terminal T2a (FIG. 5C) and guided into the winding space S1 through the passage 12b, and the coil L1c of the primary winding L1. An insulating layer 21 having a predetermined thickness is formed on the coil L1c by winding it up (in the direction of the arrow in the figure). Next, it is guided into the winding space S2 through the passage 14a, wound around the coil L1b to form an insulating layer 21 having a predetermined thickness, and returned to the winding space S1 through the passage 14a (FIG. 4D). Furthermore, it guide | induces to the outer side of the flange 12 via the channel | path 12b, and fixes the end of winding to terminal T2a. Note that the start and end of winding of the thread material Y can be quickly fixed to the terminal T2a by using an adhesive, heating and melting, or simply tangling.

  Thereafter, the wire C2 of the secondary winding L2 fixes the winding start to the terminal T2a ((E) in the same figure) and leads it into the winding space S1 through the passage 12b to form the coil L2a on the insulating layer 21. The coil L2b is formed on the insulating layer 21 through the passage 14a to be introduced into the winding space S2, and is then introduced into the winding space S3 through the passage 15a. At this time, the wire C2 is smoothly guided from above the coil L2b onto the cylindrical portion 11 of the winding space S3 along the slope of the bottom of the passage 15a. Subsequently, the wire C2 forms a coil L2c on the cylindrical portion 11 in the winding space S3 (FIG. 5F), and is fixed to the lower end of the terminal T2b through the outer periphery of the flange 13.

  When the primary winding L1, the insulating layers 21, 21, and the secondary winding L2 are thus formed on the bobbin 10, the primary and secondary windings L1 and L2 are made of a sealing material such as epoxy resin or urethane resin. By filling with SL, sealing is performed together with the insulating layers 21 and 21 (FIG. 2). Note that the sealing material SL may be filled in a vacuum, or may be filled under atmospheric pressure, and then the whole may be put into a vacuum atmosphere. At this time, the bobbin 10 passes through the passages 12a, 12b, 13b, 13b..., 14a, 14b, 14b, 15a, 15b, 15b, and the air in the primary and secondary windings L1, L2 and the insulating layers 21, 21. Can be reliably discharged to the outside, and there is no possibility of generating voids in the sealing material SL.

  Such an insulation transformer for high voltage generation has a terminal T2a grounded, and a high-voltage is applied to the terminal T2b of the secondary winding L2 by passing a cutting-type oscillating current to the primary winding L1 via the terminals T1a and T1b. Can be generated. That is, the terminals T1a, T1b, and T2a are on the low potential side, and the primary winding L1 is disposed on the low potential side of the secondary winding L2. Therefore, the insulating layers 21 and 21 may realize insulation strength corresponding to the high voltage divided by the coils L2a and L2b.

  In the above description, the insulating layer 21 can be formed in the winding space S3 in which only the coil L2c of the secondary winding L2 is wound without winding the primary winding L1. By making the height position of the coil L2c substantially the same as that of the coil L2b in the adjacent winding space S2, the dielectric strength between the start and end of each winding of the coils L2b and L2c can be easily improved. However, this point is that in the portion of the winding space S3 where only the coil L2c is wound, the outer diameter of the cylindrical portion 11 is made larger than that in the portion of the winding space S2, or the flange 15 between the winding spaces S2 and S3 is sufficiently thick. It is also possible to combine these methods appropriately.

  Further, the start and end of winding of the yarn material Y forming the insulating layer 21 may be fixed to an appropriate dedicated fixing portion formed on the bobbin 10 instead of being fixed to the terminal T2a.

Other embodiments

  The bobbin 10 may be provided with one or more arbitrary number of flanges 14 and 15 between the flanges 12 and 13 (FIG. 6). That is, the bobbin 10 omits the flange 14 to form the winding spaces S1 and S2 (FIG. 1A), thereby forming the primary winding L1 in the winding space S1 and winding the secondary winding L2. It can be formed by dividing and winding into spaces S1 and S2. The insulating layer 21 is interposed between the primary and secondary windings L1 and L2 in the winding space S1 to insulate the primary and secondary windings L1 and L2.

  Further, the bobbin 10 may be provided with a plurality of flanges 14, 14, 15, and 15 ((B) in FIG. 4) to increase the number of divisions of the primary and secondary windings L1 and L2. In this case, the insulating layers 21, 21... May be formed thicker as they are located on the high potential side of the secondary winding L2.

  In the above description, the bobbin 10 may omit all of the intermediate flanges 14 and 15. The primary winding L1 may be formed only in the winding space S1 on the lowest potential side regardless of the number of divisions of the secondary winding L2. Furthermore, the groove-like passages 13b, 13b,..., 14b, 14b, 15b, 15b formed in the flanges 13, 14, 15 are formed radially around the cylindrical portion 11 instead of being continuously formed vertically. May be.

  The present invention can be widely applied not only to ignition but also to high voltage generating insulating transformers used for other arbitrary applications such as ozone generators, discharge insecticides, air cleaners, electrostatic precipitators, etc. it can.

Whole structure exploded perspective view XX sectional view equivalent to FIG. Explanatory drawing of the main part of FIG. Electrical connection diagram Manufacturing process diagram Schematic explanatory diagram showing another embodiment

Explanation of symbols

CA ... Core L1 ... Primary winding L2 ... Secondary winding T1a, T1b, T2a, T2b ... Terminal Y ... Thread material SL ... Sealing material 10 ... Bobbin 11 ... Cylinder part 12, 13, 14, 15 ... Flange 12a, 12b, 13b, 14a, 14b, 15a, 15b ... passage 21 ... insulating layer

Patent Applicant RB Controls Inc.
Attorney Tadaaki Matsuda, Attorney

Claims (5)

  A bobbin that forms a winding space between the flanges at both ends of the cylindrical part that incorporates the core, and the intermediate part, and a primary winding, an insulating layer, and a secondary winding that are sequentially formed on the bobbin, The secondary winding is divided into all the winding spaces on the bobbin, and the primary winding is formed in a part of the winding space on the low potential side of the secondary winding. The insulating layer interposed between the secondary windings is formed of an insulating thread material, and each of the flanges has a passage reaching from the outer periphery to the outer periphery of the cylindrical portion, and the passage includes the primary winding. A groove on the surface of the flange of the other end provided with the terminal of the wire, the flange of one end providing the terminal on the low potential side of the secondary winding and providing the terminal on the high potential side of the secondary winding The primary and secondary windings are sealed with a sealing material together with the insulating layer. High voltage generating insulating transformer and symptoms.   2. The high voltage generating insulating transformer according to claim 1, wherein the yarn material is a multifilament yarn.   3. The high voltage generating insulating transformer according to claim 1, wherein the insulating layer is also formed in the winding space where only the secondary winding is wound.   The high-voltage generation according to any one of claims 1 to 3, wherein the yarn material starts winding at a terminal for the primary and secondary windings attached to the bobbin and fixes the winding end. Insulation transformer. 5. The high voltage generating insulating transformer according to claim 1, wherein the groove-shaped passage is formed so as to be in contact with an outer periphery of the cylindrical portion.

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