JP4391252B2 - Output transformer for high frequency heating - Google Patents

Output transformer for high frequency heating Download PDF

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JP4391252B2
JP4391252B2 JP2004013738A JP2004013738A JP4391252B2 JP 4391252 B2 JP4391252 B2 JP 4391252B2 JP 2004013738 A JP2004013738 A JP 2004013738A JP 2004013738 A JP2004013738 A JP 2004013738A JP 4391252 B2 JP4391252 B2 JP 4391252B2
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output transformer
ring
secondary coil
coil
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JP2005209826A (en
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力 宮崎
茂義 川島
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株式会社ミヤデン
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Description

本発明は、焼き入れや焼き鈍し等の高周波加熱に使用して好適な高周波加熱用出力変成器に関する。   The present invention relates to a high-frequency heating output transformer suitable for use in high-frequency heating such as quenching and annealing.

従来、この種の出力変成器としては、例えば特許文献1に開示されている。この出力変成器は、I型コアの周囲に所定回数巻回された一次コイルと、この一次コイルの外側に配置された二次コイルと、一次コイル及び二次コイルを取り囲むように配置されたリングコアと、該リングコアの外側に配置された円筒状カバー等で構成されている。
特開2002−334808号公報
Conventionally, this type of output transformer is disclosed in, for example, Patent Document 1. The output transformer includes a primary coil wound around the I-type core a predetermined number of times, a secondary coil disposed outside the primary coil, and a ring core disposed so as to surround the primary coil and the secondary coil. And a cylindrical cover or the like disposed outside the ring core.
JP 2002-334808 A

しかしながら、この出力変成器にあっては、小型化と軽量化及び加熱効率の向上等が図れるものの、所定の内径(外径)のリングコアを幅方向に連接させることで全体形状が円筒形状となるように構成されており、リングコアは、出力変成器に要求される出力特性に応じた内径のリングコアが使用されるようになっている。一方、市販されているリングコアは、その内径が複数種類に特定化されていることから、出力変成器に要求される出力特性に的確に対応したリングコアを使用することは難しい。   However, in this output transformer, although the size and weight can be reduced and the heating efficiency can be improved, the overall shape becomes a cylindrical shape by connecting ring cores having a predetermined inner diameter (outer diameter) in the width direction. As the ring core, a ring core having an inner diameter corresponding to the output characteristics required for the output transformer is used. On the other hand, since commercially available ring cores are specified in a plurality of types, it is difficult to use a ring core that accurately corresponds to the output characteristics required for the output transformer.

そのため、出力変成器の製造にあたっては、最も近い出力特性が得られる市販のリングコアを使用しているのが実情であり、その結果、要求される出力特性より高い特性が得られる高価な大径のリングコアを使用せざるを得ない等、出力変成器自体のコストアップを招くと共に、大径のリングコアの使用により出力変成器自体の製造作業が面倒になり易いという問題点を有している。   Therefore, in the production of output transformers, the actual situation is to use a commercially available ring core that can obtain the closest output characteristics, and as a result, an expensive large-diameter that can obtain characteristics higher than the required output characteristics. In addition to incurring the cost increase of the output transformer itself, for example, it is necessary to use a ring core, there is a problem that the manufacturing work of the output transformer itself tends to be troublesome due to the use of a large-diameter ring core.

本発明は、このような事情に鑑みてなされたもので、その目的は、分割型のリングコアを使用することにより各種出力特性に容易かつ的確に対応できて、コストダウンと製造作業の作業性向上を同時に図り得る高周波加熱用出力変成器を提供することにある。   The present invention has been made in view of such circumstances, and its purpose is to easily and accurately respond to various output characteristics by using a split ring core, thereby reducing costs and improving workability of manufacturing operations. An object of the present invention is to provide an output transformer for high frequency heating that can simultaneously achieve the above.

かかる目的を達成すべく、本発明のうち請求項1に記載の発明は、コア挿通部を有して平面視略コ字状に形成された二次コイルと、該二次コイルの外側に巻回配置された一次コイルと、前記二次コイルのコア挿通部に挿通されたI型コア部及び前記一次コイルと二次コイルの外側に配置されたリングコア部からなるコアと、該コアの外側に配置された円筒状のカバーと、を備え、前記リングコア部は、フェライト粉末の型成形で形成されたリングコアを二分割して得られた半円弧形状の一対の半リングコアと、該半リングコアの接合端面を連結接合する一対のI型連結コアを有すると共に、幅方向に複数個連接することによってその外形形状が略円筒形状に形成されて、前記I型連結コアの外側に略三日月形状の絶縁材からなる保持部材が介装された状態で前記カバー内に内蔵されていることを特徴とする。
In order to achieve such an object, the invention according to claim 1 of the present invention includes a secondary coil having a core insertion part and formed in a substantially U shape in plan view, and a coil wound around the outer side of the secondary coil. a primary coil disposed times, a core made of the second I-shaped core portion is inserted into the core insertion portion of the coil and the primary coil and the ring core portion disposed outside the secondary coil, the outside of the core A cylindrical cover disposed, and the ring core portion is formed by splitting a ring core formed by ferrite powder molding into a half arc-shaped pair of half ring cores, and joining the half ring cores An insulating material having a pair of I-type connecting cores for connecting and joining the end faces and having a substantially cylindrical shape formed by connecting a plurality of I-type connecting cores in the width direction. A holding member consisting of Characterized in that it is built in has been said cover in a state.

本発明の請求項1に記載の発明によれば、I型コア部とリングコア部からなるコアが、複数に分割されたリングコア部を連結接合させることでその外形形状が略円筒形状に形成されるため、分割状態のリングコア部の接合により略円筒形状の外形形状を所望の大きさとすることができて、出力特性に応じた外径のリング状コアの使用が可能となり、各種出力特性に容易かつ的確に対応することができて、出力変成器のコストダウンとその製造作業の作業性向上を同時に図ることができる。   According to the first aspect of the present invention, the outer shape of the core composed of the I-shaped core portion and the ring core portion is formed into a substantially cylindrical shape by connecting and joining the ring core portions divided into a plurality of portions. Therefore, the outer shape of the substantially cylindrical shape can be set to a desired size by joining the ring core portions in a divided state, and it becomes possible to use a ring-shaped core having an outer diameter corresponding to the output characteristics. It is possible to cope with the problem accurately, and it is possible to simultaneously reduce the cost of the output transformer and improve the workability of the manufacturing work.

また、コアが一対の半リングコア部と一対のI型連結コアとで形成されるため、フェライト粉末の型成形で形成された市販のリングコアを切断して二分割とし、これをI型連結コアで接合することで外形形状が略円筒形状のコアを形成できて、所定形状のリングコアを各種出力特性の出力変成器に簡単に使用できる等、コアの汎用性を一層高めることができると共に、I型連結コア部分を利用して円筒形状の出力変成器の方向性を明確にすることができる。また、I型連結コアの外側に略三日月状の保持部材が介装されているため、コアを円筒形状のカバー内に嵌挿する場合に保持部材により安定して収容することができる。In addition, since the core is formed by a pair of half ring core portions and a pair of I-shaped connecting cores, a commercially available ring core formed by molding a ferrite powder is cut into two parts, which are divided into I-shaped connecting cores. It is possible to form a core whose outer shape is substantially cylindrical by joining, and it is possible to easily use a ring core of a predetermined shape for an output transformer with various output characteristics. The directivity of the cylindrical output transformer can be clarified using the connecting core portion. In addition, since a substantially crescent-shaped holding member is interposed outside the I-shaped connecting core, the core can be stably accommodated by the holding member when the core is fitted into the cylindrical cover.

以下、本発明を実施するための最良の形態を図面に基づいて詳細に説明する。
図1〜図3は、本発明に係わる高周波加熱用出力変成器の一実施形態を示し、図1がその一部破断した斜視図、図2がその要部の横断面図、図3がその縦断面図である。
The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
1 to 3 show an embodiment of an output transformer for high-frequency heating according to the present invention, FIG. 1 is a partially broken perspective view, FIG. 2 is a cross-sectional view of the main part, and FIG. It is a longitudinal cross-sectional view.

図1及び図2において、出力変成器1は、樹脂パイプ等からなる円筒状のカバー2と、このカバー2の一方の開口端部2aに装着された加熱コイル3と、カバー2の他方の開口端部2bに装着された入力プレート4等によって構成されている。カバー2は、その外周面で例えば入力プレート4側に図示しない加熱スイッチが配設され、この加熱スイッチをオン操作することにより、入力プレート4等を介して加熱コイル3に高周波電流が供給されるようになっている。なお、加熱コイル3は、ホルダー6と、このホルダー6の先端に固着された例えば馬蹄式のコイル部7等で形成されている。   1 and 2, the output transformer 1 includes a cylindrical cover 2 made of a resin pipe or the like, a heating coil 3 attached to one opening end 2 a of the cover 2, and the other opening of the cover 2. It is comprised by the input plate 4 etc. with which the edge part 2b was mounted | worn. The cover 2 is provided with a heating switch (not shown) on the outer peripheral surface thereof, for example, on the input plate 4 side. By turning on this heating switch, a high-frequency current is supplied to the heating coil 3 via the input plate 4 or the like. It is like that. The heating coil 3 is formed of a holder 6 and, for example, a horseshoe-type coil portion 7 fixed to the tip of the holder 6.

そして、前記カバー2内には、二次コイル8、コアを形成する複数個の略E型コア9及び一次コイル11等が内蔵されている。このうち、二次コイル8は、例えば中心部にコア挿通部8a(図3参照)を有し、銅板や銅の各パイプで2つの側壁部8bとこの側壁部8bを連結する連結部8c及び一対の平板部8dで平面視(もしくは側面視)略コ字状の単巻状に形成されて、略E型コア9のI型コア部9bの周囲に水平状態で配置されている。   The cover 2 contains a secondary coil 8, a plurality of substantially E-shaped cores 9 forming a core, a primary coil 11, and the like. Among these, the secondary coil 8 has, for example, a core insertion portion 8a (see FIG. 3) in the center, and two side wall portions 8b and a connection portion 8c for connecting the side wall portion 8b with copper plates and copper pipes. The pair of flat plate portions 8d are formed in a substantially U-shaped single winding in a plan view (or a side view), and are arranged in a horizontal state around the I-type core portion 9b of the substantially E-type core 9.

また、二次コイル8の角パイプの連結部には一対のホースコネクタ12が固着されると共に、角パイプの開口端には半円形状の出力プレートとしての加熱コイル接続板13がそれぞれ固着されている。この各加熱コイル接続板13に前記加熱コイル3のホルダー6を形成する半円形銅板6aが電気的かつ機械的にそれぞれ着脱可能に接続され、この加熱コイル接続板13と半円形銅板6aには、冷却水の流路を形成する図示しない冷却水孔がそれぞれ形成されている。   A pair of hose connectors 12 are fixed to the connecting portion of the square pipe of the secondary coil 8, and a heating coil connecting plate 13 as a semicircular output plate is fixed to the open end of the square pipe. Yes. A semicircular copper plate 6a forming the holder 6 of the heating coil 3 is electrically and mechanically detachably connected to each heating coil connecting plate 13, and the heating coil connecting plate 13 and the semicircular copper plate 6a are connected to each other. Cooling water holes (not shown) that form the flow path of the cooling water are formed.

また、前記略E型コア9は、図3に示すように、例えばフェライト粉末の型成形によって、半円弧形状のリングコア部9aと、このリングコア部9aの中間位置に内側に延設されたI型コア部9bとで形成されている。この一対の略E型コア9の接合端面であるリングコア部9aの端面及びI型コア部9bの端面をそれぞれ対向させて接合すると共に幅方向に複数個連接することによって、外周形状が円形でその円の直径位置にI型コア部9bが位置した略円筒形状のコアが形成されるようになっている。   Further, as shown in FIG. 3, the substantially E-shaped core 9 includes a semicircular arc-shaped ring core portion 9a and an I-type extending inwardly at an intermediate position of the ring core portion 9a, for example, by molding of ferrite powder. It is formed with the core part 9b. The end surface of the ring core portion 9a and the end surface of the I-type core portion 9b, which are the joining end surfaces of the pair of substantially E-shaped cores 9, are joined to face each other and connected in the width direction so that the outer peripheral shape is circular. A substantially cylindrical core in which the I-shaped core portion 9b is located at the diameter position of the circle is formed.

そして、この複数個の略E型コア9で形成されるコアのI型コア部9bの外面とリングコア部9aの内面間には、その外周面がガラスチューブ等の絶縁材で被覆された銅パイプからなる前記一次コイル11が所定回数巻回されている。この一次コイル11の両端部11a、11bは、カバー2の他方の開口端部2b側に引き出され、前記入力プレート4のカバー2内側に設けられた銅パイプ14に銅パイプ15を介して電気的かつ機械的にそれぞれ接続されている。   A copper pipe whose outer peripheral surface is covered with an insulating material such as a glass tube is provided between the outer surface of the I-type core portion 9b and the inner surface of the ring core portion 9a. The primary coil 11 is wound a predetermined number of times. Both ends 11 a and 11 b of the primary coil 11 are drawn to the other open end 2 b side of the cover 2, and are electrically connected to the copper pipe 14 provided inside the cover 2 of the input plate 4 via the copper pipe 15. And each is mechanically connected.

なお、入力プレート4は、絶縁板16で絶縁されて端子板を形成する半円形銅板17a、17bを有し、この半円形銅板17a、17bに設けられた孔には銅パイプがそれぞれ嵌合固着され、この銅パイプの外側(カバー2外側)には、ホースコネクタ18aがそれぞれ固着され、銅パイプ19の内側(カバー2内側)には、ホースコネクタ18bがそれぞれ固着されている。   The input plate 4 has semicircular copper plates 17a and 17b that are insulated by an insulating plate 16 to form terminal plates, and copper pipes are fitted and fixed in holes provided in the semicircular copper plates 17a and 17b, respectively. The hose connector 18a is fixed to the outside of the copper pipe (outside of the cover 2), and the hose connector 18b is fixed to the inside of the copper pipe 19 (inside of the cover 2).

また、半円形銅板17a、17bの銅パイプのカバー2内側でホースコネクタ18bが固着される手前側には、前記銅パイプ14が分岐状態で固着されている。この銅パイプ14とホースコネクタ18bにより、入力プレート4のカバー2外側に位置する一対のホースコネクタ18aからなる1つの流路が、カバー2内側において2つの流路に分岐されるようになっている。また、入力プレート4のホースコネクタ18bには、チューブ20を介して前記ホースコネクタ12が接続され、ホースコネクタ18aには、図示しない冷却ケーブルを介して高周波発振器19(トランジスタインバータ装置)が接続されている。   The copper pipe 14 is fixed in a branched state on the near side of the semicircular copper plates 17a, 17b where the hose connector 18b is fixed inside the cover 2 of the copper pipe. With the copper pipe 14 and the hose connector 18b, one flow path composed of a pair of hose connectors 18a located outside the cover 2 of the input plate 4 is branched into two flow paths inside the cover 2. . Further, the hose connector 12 is connected to the hose connector 18b of the input plate 4 via a tube 20, and the high frequency oscillator 19 (transistor inverter device) is connected to the hose connector 18a via a cooling cable (not shown). Yes.

この出力変成器1によれば、出力変成器1のカバー2を例えば手で持ち(あるいは所定位置に設定して)加熱コイル3のコイル部7内にワーク(図示せず)をセットした状態で、カバー2の加熱スイッチをオンすると、高周波発振器19から図示しない冷却ケーブルを介して出力変成器1の一次コイル11に所定の高周波電流が供給される。この出力変成器1の一次コイル11への高周波電流の供給により、誘導結合によって二次コイル8に巻数比に応じた大電流が流れ、この大電流が加熱コイル3に供給されて、コイル部7に近接配置されているワークが誘導加熱される。   According to the output transformer 1, the work 2 (not shown) is set in the coil portion 7 of the heating coil 3 by holding the cover 2 of the output transformer 1 by hand (or setting it at a predetermined position). When the heating switch of the cover 2 is turned on, a predetermined high-frequency current is supplied from the high-frequency oscillator 19 to the primary coil 11 of the output transformer 1 via a cooling cable (not shown). By supplying the high frequency current to the primary coil 11 of the output transformer 1, a large current corresponding to the turn ratio flows through the secondary coil 8 by inductive coupling, and this large current is supplied to the heating coil 3, and the coil unit 7 The work placed in proximity to is heated by induction.

また、高周波電流の供給と同時に、高周波発振器19に設けられている冷却水供給装置が作動して、冷却ケーブル内の流路及び出力変成器1の流路を介して、二次コイル8と加熱コイル3及び一次コイル11に冷却水が循環供給される。この冷却水により、大電流による出力変成器1や加熱コイル3等の発熱が抑えられ、発熱による加熱効率の低下が防止されるようになっている。   Simultaneously with the supply of the high-frequency current, the cooling water supply device provided in the high-frequency oscillator 19 operates to heat the secondary coil 8 and the heating via the flow path in the cooling cable and the flow path of the output transformer 1. Cooling water is circulated and supplied to the coil 3 and the primary coil 11. With this cooling water, heat generation of the output transformer 1 and the heating coil 3 due to a large current is suppressed, and a decrease in heating efficiency due to heat generation is prevented.

このように、上記実施形態の出力変成器1によれば、単巻きで略平板状に形成された二次コイル8のコア挿通部8a内に略E型コア9のI型コア部9bを挿通配置すると共に、I型コア部9bの外周とリングコア部9aの内面間(二次コイル8の両面側)に一次コイル11を巻回するため、一次コイル11を二次コイル8と略平行状態で多数回巻回することができて、略E型コア9に対する一次コイル8の巻数比率を高めた状態で円筒状のカバー2内に内蔵することができる。   As described above, according to the output transformer 1 of the above-described embodiment, the I-type core portion 9b of the substantially E-type core 9 is inserted into the core insertion portion 8a of the secondary coil 8 formed in a single plate and in a substantially flat plate shape. Since the primary coil 11 is wound between the outer periphery of the I-type core portion 9b and the inner surface of the ring core portion 9a (both sides of the secondary coil 8), the primary coil 11 is substantially parallel to the secondary coil 8. It can be wound many times and can be incorporated in the cylindrical cover 2 in a state where the turn ratio of the primary coil 8 to the substantially E-shaped core 9 is increased.

また、I型コア部9bの外側にリングコア部9aが設けられているため、I型コア部9bで誘起される磁束を左右に分散させることができて、磁束をリングコア部9a内に封じ込める、すなわち磁束の外部への漏れがなくなって、一次コイル11と二次コイル8の誘導結合係数が高められる。これらのことから、出力変成器1自体が円筒状のカバー2内に効率的に内蔵され、その小型化及び軽量化を図ることができる。   Further, since the ring core portion 9a is provided outside the I-type core portion 9b, the magnetic flux induced in the I-type core portion 9b can be dispersed to the left and right, and the magnetic flux is enclosed in the ring core portion 9a. The leakage of the magnetic flux to the outside is eliminated, and the inductive coupling coefficient between the primary coil 11 and the secondary coil 8 is increased. For these reasons, the output transformer 1 itself is efficiently incorporated in the cylindrical cover 2 and can be reduced in size and weight.

さらに、略E型コア9の連接で形成されるコアが、リングコア部9aやI型コア部9aの端面を接合させることによって、その外形形状が略円筒形状に形成されているため、分割状態のリングコア部9b等の接合によって略円筒形状の外形形状を所望の大きさとすることができる。その結果、出力特性に応じた外径のリング状コアの使用が可能となり、各種出力特性に容易かつ的確に対応することができて、出力特性以上の大きさや性能のリングコアを使用する必要がなくなり、出力変成器1のコストダウンを図ることができる。また、一次コイル11の巻数に応じた大きさのリングコアの使用が可能となり、出力変成器1自体の製造が簡単に行える等、製造作業の作業性向上を同時に図ることができる。   Further, since the core formed by connecting the substantially E-shaped cores 9 is joined to the end surfaces of the ring core portion 9a and the I-shaped core portion 9a, the outer shape is formed into a substantially cylindrical shape. By joining the ring core portion 9b and the like, the substantially cylindrical outer shape can be set to a desired size. As a result, it is possible to use a ring-shaped core with an outer diameter according to the output characteristics, and it is possible to easily and accurately respond to various output characteristics, eliminating the need to use a ring core with a size and performance exceeding the output characteristics. The cost of the output transformer 1 can be reduced. In addition, a ring core having a size corresponding to the number of turns of the primary coil 11 can be used, and the output transformer 1 itself can be easily manufactured.

特に、コアが分割状態の一対の略E型コア9で形成されているため、予め略E型コア9を型成形によって形成できると共に、この成形された略E型コア9の接合端面を接合することでリングコア部9aとI型コア部9bを有するコアを形成できて、コアの構成を簡略化することができる。また、I型コア部9bがリングコア部9aに一体成形されているため、I型コア部9bとリングコア部9aの位置決めが不要になると共に、I型コア部9bの位置が安定して一次コイル11等の巻回作業が容易に行える等、出力変成器1の製造が一層簡単となってその製造コストの低減化を図ることができる。   Particularly, since the core is formed of a pair of substantially E-shaped cores 9 in a divided state, the substantially E-shaped core 9 can be formed in advance by molding, and the joined end faces of the shaped substantially E-shaped core 9 are joined. Thus, a core having the ring core portion 9a and the I-type core portion 9b can be formed, and the configuration of the core can be simplified. Further, since the I-type core portion 9b is integrally formed with the ring core portion 9a, positioning of the I-type core portion 9b and the ring core portion 9a is not necessary, and the position of the I-type core portion 9b is stabilized and the primary coil 11 is stabilized. Thus, the output transformer 1 can be manufactured more easily and the manufacturing cost can be reduced.

また、出力変成器1の外周部にリングコア部9aが配設されているため、磁束の外部への漏れによる外部ノイズの発生を抑えることができ、出力変成器1を使用する箇所での、外部ノイズによる他の機器等への悪影響を防止することができる。さらに、出力変成器1が可撓性の冷却ケーブルで高周波発振器19に接続されているため、前記小型化及び軽量化と合わせ、移動困難なワーク位置への出力変成器1の移動を容易に行うことができたり、屋外での使用も可能となり、誘導加熱用の加熱コイル3の使用範囲を拡大させることができる等、出力変成器1自体の使い勝手を大幅に向上させることが可能となる。   Further, since the ring core portion 9a is disposed on the outer peripheral portion of the output transformer 1, it is possible to suppress the generation of external noise due to leakage of magnetic flux to the outside, and the external location at the location where the output transformer 1 is used. It is possible to prevent adverse effects of noise on other devices. Further, since the output transformer 1 is connected to the high-frequency oscillator 19 with a flexible cooling cable, the output transformer 1 can be easily moved to a work position that is difficult to move in combination with the reduction in size and weight. It can be used outdoors, can be used outdoors, and the use range of the heating coil 3 for induction heating can be expanded, so that the usability of the output transformer 1 itself can be greatly improved.

さらにまた、出力変成器1のカバー2に加熱スイッチが設けられているため、この加熱スイッチの手元操作が可能となり、誘導加熱時の操作性の向上が図れると共に、出力変成器1の外形形状がリングコア部9aに対応したカバー2により略円筒形状に形成されているため、外形形状の一層の小型化が図れ、これらのことから、出力変成器1自体の使い勝手を一層向上させることができる。   Furthermore, since the heating switch is provided on the cover 2 of the output transformer 1, it is possible to operate the heating switch at hand, thereby improving the operability during induction heating and the outer shape of the output transformer 1 is improved. Since the cover 2 corresponding to the ring core portion 9a is formed in a substantially cylindrical shape, the outer shape can be further reduced in size, and the usability of the output transformer 1 itself can be further improved.

図4は、本発明に係わる出力変成器の他の実施形態を示す図3と同様の縦断面図である。以下、上記実施形態と同一部位には同一符号を付して説明する。この実施形態の特徴は、コアとして、リングコアを二分割した半円弧形状の一対の半リングコア21(リングコア部)と、この半リングコア21の接合端面を連結接合する一対の連結I型コア22と、二次コイル8のコア挿通部8a内に嵌挿されるI型コア23とで形成した点にある。   FIG. 4 is a longitudinal sectional view similar to FIG. 3 showing another embodiment of the output transformer according to the present invention. Hereinafter, the same parts as those in the above embodiment will be described with the same reference numerals. A feature of this embodiment is that a pair of semicircular arc-shaped half ring cores 21 (ring core portions) in which the ring core is divided into two as a core, and a pair of connected I-type cores 22 that connect and join the joining end faces of the half ring core 21; It is in the point formed with the I-type core 23 inserted in the core insertion part 8a of the secondary coil 8.

すなわち、市販されている所定外径のリングコアを直径位置で切断して一対の半リングコア21を作成し、この各半リングコア21の接合端面間を連結I型コア22でそれぞれ連結することにより、コアの外形形状が略円筒形状に形成され、このコアの内部に一次コイル11と二次コイル8を配置する。この時、連結I型コア22の外面には、略三日月形状の例えば絶縁材からなる保持部材24が介装されており、この保持部材24によってコアの外形形状が略円形となって円形のカバー2内に安定して保持されるようになっている。   That is, a commercially available ring core having a predetermined outer diameter is cut at the diameter position to create a pair of half ring cores 21, and the joining end faces of the half ring cores 21 are respectively connected by the connecting I-type cores 22. Is formed in a substantially cylindrical shape, and the primary coil 11 and the secondary coil 8 are arranged inside the core. At this time, a holding member 24 made of, for example, an insulating material is interposed on the outer surface of the connection I-type core 22, and the outer shape of the core becomes a substantially circular shape by this holding member 24, and the circular cover 2 is held stably in the inside.

この実施形態の出力変成器1においても、分割型の半リングコア21により、上記実施形態と同様の作用効果が得られる他に、コアが一対の半リングコア21と一対のI型連結コア22とを有するため、例えば市販のリングコアを切断して二分割とし、これを連結I型コア22で接合することで外形形状が略円筒形状のコアを形成できて、市販されている所定形状のリングコアを各種出力特性に簡単に使用できる等、コアの汎用性を一層高めることができる。また、I型連結コア22の外側に保持部材24が介装されているため、コアを円筒形状のカバー2内に嵌挿する場合に、保持部材24でコアや各コイル8、11等をカバー2内に安定収容できるという作用効果が得られる。   Also in the output transformer 1 of this embodiment, the split type half ring core 21 can obtain the same effect as that of the above embodiment, and the core includes a pair of half ring cores 21 and a pair of I type connection cores 22. Therefore, for example, a commercially available ring core is cut into two parts, and this is joined with a connecting I-type core 22 to form a substantially cylindrical core, and various commercially available ring cores having various shapes can be formed. The versatility of the core can be further enhanced, such as being easy to use for output characteristics. Further, since the holding member 24 is interposed outside the I-type connecting core 22, when the core is inserted into the cylindrical cover 2, the holding member 24 covers the core and the coils 8 and 11. The effect of being able to be stably accommodated in 2 is obtained.

なお、本発明は上記した各実施形態のそれぞれに限定されるものでもなく、例えば略E型コア9を連結I型コア22で連結する等、図3に示す実施形態と図4に示す実施形態とを組み合わせるようにしても良い。また、上記実施形態においては、二次コイル8を1枚の平板状に形成することで1ターン(単巻)に形成したが、例えば平板を複数枚直列状態で積層することにより複数巻に形成しても良い。   The present invention is not limited to each of the above-described embodiments. For example, the embodiment shown in FIG. 3 and the embodiment shown in FIG. And may be combined. Moreover, in the said embodiment, although the secondary coil 8 was formed in 1 turn (single turn) by forming in the shape of one flat plate, for example, it is formed in multiple turns by laminating a plurality of flat plates in series. You may do it.

さらに、リング状のコアの外周面側に円筒状のカバー2を配置することなく、例えば絶縁テープによる巻回や絶縁塗料の塗布等でカバー2に相当する部材を配置するようにしても良い。この場合は、連結I型コア22部分を平坦に形成して円筒形状の出力変成器1の外観上における方向性を明確にすることで、平坦部を利用して例えば出力変成器1を作業台上に安定載置することもできる。   Furthermore, a member corresponding to the cover 2 may be disposed by, for example, winding with an insulating tape or applying an insulating paint without disposing the cylindrical cover 2 on the outer peripheral surface side of the ring-shaped core. In this case, the connecting I type core 22 is formed flat to clarify the direction of the appearance of the cylindrical output transformer 1, so that the output transformer 1 can be mounted on the work table using the flat portion. It can also be placed stably on top.

本発明は、高周波誘導加熱による焼き入れに限らず、焼き鈍し等の各種高周波加熱用の出力変成器にも適用できる。   The present invention is not limited to quenching by high-frequency induction heating, but can also be applied to output transformers for various high-frequency heating such as annealing.

本発明に係わる高周波加熱用出力変成器の一実施形態を示す一部破断した斜視図The partially broken perspective view which shows one Embodiment of the output transformer for high frequency heating concerning this invention 同その横断面図Its cross-sectional view 同縦断面図Same longitudinal section 本発明に係わる出力変成器の他の実施形態を示す図3と同様の縦断面図FIG. 3 is a longitudinal sectional view similar to FIG. 3, showing another embodiment of the output transformer according to the present invention.

符号の説明Explanation of symbols

1・・・出力変成器、2・・・カバー、3・・・加熱コイル、8・・・二次コイル、8a・・・コア挿通部、9・・・略E型コア、9a・・・リングコア部、9b・・・I型コア部、11・・・一次コイル、21・・・半リングコア(リングコア部)、22・・・連結I型コア、23・・・I型コア、24・・・保持部材。   DESCRIPTION OF SYMBOLS 1 ... Output transformer, 2 ... Cover, 3 ... Heating coil, 8 ... Secondary coil, 8a ... Core insertion part, 9 ... Substantially E type core, 9a ... Ring core part, 9b ... I type core part, 11 ... primary coil, 21 ... half ring core (ring core part), 22 ... connected I type core, 23 ... I type core, 24 ... -Holding member.

Claims (1)

コア挿通部を有して平面視略コ字状に形成された二次コイルと、該二次コイルの外側に巻回配置された一次コイルと、前記二次コイルのコア挿通部に挿通されたI型コア部及び前記一次コイルと二次コイルの外側に配置されたリングコア部からなるコアと、該コアの外側に配置された円筒状のカバーと、を備え、
前記リングコア部は、フェライト粉末の型成形で形成されたリングコアを二分割して得られた半円弧形状の一対の半リングコアと、該半リングコアの接合端面を連結接合するI型連結コアを有すると共に、幅方向に複数個連接することによってその外形形状が略円筒形状に形成されて、前記I型連結コアの外側に略三日月形状の絶縁材からなる保持部材が介装された状態で前記カバー内に内蔵されていることを特徴とする高周波加熱用出力変成器。
A secondary coil having a core insertion part formed in a substantially U shape in plan view, a primary coil wound around the secondary coil, and the core insertion part of the secondary coil. A core composed of an I-type core portion and a ring core portion disposed outside the primary coil and the secondary coil, and a cylindrical cover disposed outside the core ,
The ring core portion has a pair of semi-circular arcs obtained by dividing a ring core formed by ferrite powder molding into two parts, and an I-type connecting core that joins and joins the joining end faces of the half ring core. The outer shape of the cover is formed in a substantially cylindrical shape by connecting a plurality of members in the width direction, and the holding member made of a substantially crescent-shaped insulating material is interposed outside the I-shaped connecting core. An output transformer for high-frequency heating, characterized in that it is built in .
JP2004013738A 2004-01-22 2004-01-22 Output transformer for high frequency heating Expired - Lifetime JP4391252B2 (en)

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