JPS6333369Y2 - - Google Patents
Info
- Publication number
- JPS6333369Y2 JPS6333369Y2 JP11109679U JP11109679U JPS6333369Y2 JP S6333369 Y2 JPS6333369 Y2 JP S6333369Y2 JP 11109679 U JP11109679 U JP 11109679U JP 11109679 U JP11109679 U JP 11109679U JP S6333369 Y2 JPS6333369 Y2 JP S6333369Y2
- Authority
- JP
- Japan
- Prior art keywords
- varistor
- noise filter
- conductive layer
- hole
- surge protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 239000000696 magnetic material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
Description
【考案の詳細な説明】
本考案はサージ保護付ノイズフイルタに関す
る。[Detailed Description of the Invention] The present invention relates to a noise filter with surge protection.
各種の電子機器の高度化、高感度化に伴い、こ
れら電子機器のノイズによる誤動作防止はきわめ
て重要な課題になつている。このようなノイズに
よる誤動作防止のため、従来より、第１図Ａ〜Ｃ
に示すように、インダクタンスL1，L2とコンデ
ンサC1，C2との組合せより成るローパスフイル
タが使用されてきた。しかしながら、このノイズ
フイルタでは、電子機器の保護、誤動作防止に最
も重要なサージ性ノイズ除去作用が得られない。
そこで従来は、サージ性ノイズ除去対策手段とし
て、このノイズフイルタとは別に、バリスタ、ダ
イオードまたは定電圧ダイオード等の電圧非直線
性素子を使用し、これによつて電子回路等をサー
ジ性ノイズから保護するようにしてあつた。 As various electronic devices become more sophisticated and sensitive, preventing malfunctions of these devices due to noise has become an extremely important issue. In order to prevent malfunctions caused by such noise, conventionally, the
As shown in Figure 1, a low-pass filter consisting of a combination of inductances L 1 and L 2 and capacitors C 1 and C 2 has been used. However, this noise filter does not provide the surge noise removal effect that is most important for protecting electronic equipment and preventing malfunctions.
Conventionally, as a measure to remove surge noise, voltage nonlinear elements such as varistors, diodes, or constant voltage diodes have been used in addition to this noise filter to protect electronic circuits, etc. from surge noise. It was prepared as follows.
このため、回路部品点数が多くなり、高密度実
装化の要請に反し、コスト的にも高くなるという
欠点を生じていた。 For this reason, the number of circuit components increases, which is contrary to the demand for high-density packaging, and the cost also increases.
本考案は上述する従来の欠点を除去し、ノイズ
フイルタ自身にサージ性ノイズ除去機能を持たせ
たLC複合形のサージ保護付ノイズフイルタを提
供することを目的とする。 The object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide an LC composite noise filter with surge protection, in which the noise filter itself has a surge noise removal function.
上記目的を達成するため、本考案に係るサージ
保護付ノイズフイルタは、軸方向の貫通孔を有
し、かつ、外周面及び端面に互いに導通する導電
層を被着形成した筒状の磁性体と、酸化チタンを
主成分とする焼結体の厚み方向の両面に対の電極
を有すると共に厚み方向に貫通する貫通孔を有し
てなり、前記磁性体の前記端面における導電層上
に、貫通孔が一致するようにして、前記電極の一
方を接着したバリスタと、前記貫通孔内を貫通し
て導出され前記バリスタの前記電極の他方に導通
接続させた貫通導体と、前記磁性体の外周導電層
上に導通接続されたリード端子とを有してなるこ
とを特徴とする。 In order to achieve the above object, the noise filter with surge protection according to the present invention includes a cylindrical magnetic body having an axial through hole and having a conductive layer coated on the outer circumferential surface and the end surface to be electrically conductive to each other. , a sintered body mainly composed of titanium oxide has a pair of electrodes on both sides in the thickness direction, and has a through hole penetrating in the thickness direction, and the through hole is formed on the conductive layer on the end surface of the magnetic body. a varistor to which one of the electrodes is bonded so that the two electrodes match, a through conductor led out through the through hole and electrically connected to the other electrode of the varistor, and an outer peripheral conductive layer of the magnetic material. It is characterized in that it has a lead terminal conductively connected thereto.
バリスタは、第２図に示すように焼結体１の両
面に電極２，３を取付けた基本的な構造を有し、
その電極２，３間に加えられる印加電圧Ｖによつ
て、電流値が第３図に示すように非直線的に変化
し、印加電圧Ｖがバリスタ電圧VTを超える範囲
で、電流が急増する特異な性質を有する。したが
つて、この電圧電流特性を利用すれば、サージ吸
収作用を行なわせることができる。 The varistor has a basic structure in which electrodes 2 and 3 are attached to both sides of a sintered body 1, as shown in FIG.
Depending on the applied voltage V applied between the electrodes 2 and 3, the current value changes non-linearly as shown in Figure 3, and in the range where the applied voltage V exceeds the varistor voltage VT, the current increases rapidly. It has the following characteristics. Therefore, by utilizing this voltage-current characteristic, it is possible to perform a surge absorption function.
また、各種のバリスタのうち、焼結体１を酸化
亜鉛ZnO2系、シリコンカーバイトSiC系もしくは
酸化チタン系のものによつて構成した場合には、
誘電体特性を示すバリスタが得られることが知ら
れている。特に酸化チタン系のバリスタは誘電率
ε＝20000にも達し、非常に高性能のコンデンサ
として動作する。第４図は、この誘電体特性を有
するバリスタの等価回路図であり、Csがバリス
タ自身の有する容量である。 Furthermore, among various varistors, when the sintered body 1 is made of zinc oxide ZnO 2 type, silicon carbide SiC type, or titanium oxide type,
It is known that varistors exhibiting dielectric properties can be obtained. In particular, titanium oxide-based varistors have a dielectric constant of ε=20,000 and operate as extremely high-performance capacitors. FIG. 4 is an equivalent circuit diagram of a varistor having this dielectric property, where Cs is the capacitance of the varistor itself.
本考案においては、第１図Ａ〜Ｃで代表させた
ノイズフイルタのコンデンサC1，C2の全部また
は一部を、前述の誘電体特性を有するバリスタ、
特に酸化チタン系のバリスタによつて構成し、バ
リスタのサージ吸収特性と、高誘電率誘電体特性
とにより、それ自身がサージ吸収作用を有するサ
ージ保護付ノイズフイルタが得られるようにする
と共に、これにインダクタを組合せて高性能の
LC複合形サージ保護付ノイズフイルタを提供で
きるようにしたものである。 In the present invention, all or part of the capacitors C 1 and C 2 of the noise filter represented by FIGS.
In particular, it is made of a titanium oxide-based varistor, and the surge absorption characteristics of the varistor and the high dielectric constant dielectric characteristics make it possible to obtain a noise filter with surge protection that itself has a surge absorption function. High performance by combining inductor with
This makes it possible to provide a noise filter with LC composite surge protection.
次に、実施例たる添付図面を参照し、本考案の
内容を具体的に詳説する。第５図は本考案に係る
サージ保護ノイズフイルタの断面図である。図に
おいて、４は軸方向の貫通孔５を有し、かつ、外
周面および端面に互いに導通する導電層６１，６
２を被着形成した筒状の磁性体、７はバリスタで
ある。磁性体４はフエライトビーズによつて構成
されている。バリスタ７は酸化チタンを主成分と
する焼結体７１の厚み方向の両面に、対の電極７
２，７３を有すると共に、厚み方向に貫通する貫
通孔７４を有してなり、磁性体４の端面における
導電層６２上に、貫通孔５，７４が一致するよう
にして、電極７３を接着してある。そして、貫通
孔５，７４を貫通して導出された貫通導体８に、
焼結体７１の他の電極７２を半田付し、さらに磁
性体４の外周導電層６１上にリード端子９を半田
付け等の手段によつて固着した構造となつてい
る。８１，８２は貫通導体８のリード端子部であ
る。 Next, the contents of the present invention will be specifically explained in detail with reference to the accompanying drawings, which are examples. FIG. 5 is a sectional view of the surge protection noise filter according to the present invention. In the figure, reference numeral 4 has a through hole 5 in the axial direction, and conductive layers 61 and 6 that are electrically conductive to each other on the outer peripheral surface and the end surface.
2 is a cylindrical magnetic body formed by adhesion, and 7 is a varistor. The magnetic body 4 is composed of ferrite beads. The varistor 7 has a pair of electrodes 7 on both sides in the thickness direction of a sintered body 71 mainly composed of titanium oxide.
2, 73 and a through hole 74 penetrating in the thickness direction, and the electrode 73 is bonded onto the conductive layer 62 on the end surface of the magnetic body 4 so that the through holes 5, 74 coincide with each other. There is. Then, the through conductor 8 that penetrates through the through holes 5 and 74 and is led out,
The other electrode 72 of the sintered body 71 is soldered, and the lead terminal 9 is further fixed onto the outer circumferential conductive layer 61 of the magnetic body 4 by means such as soldering. 81 and 82 are lead terminal portions of the through conductor 8.
上述のように、磁性体４の端面にバリスタ７を
接着する構造であると、部品点数、工数が少な
く、組立が容易で、コストが安価になる。 As described above, the structure in which the varistor 7 is bonded to the end face of the magnetic body 4 reduces the number of parts and man-hours, facilitates assembly, and reduces costs.
第６図は第５図に示したサージ保護ノイズフイ
ルタの等価回路図であり、リード端子部８１ー８
２間にインダクタンスL1を有し、リード端子部
８２とリード端子９との間にバリスタ要素及びコ
ンデンサCsの並列回路を接続した回路構成とな
る。上記の回路構成において、リード端子部８１
ー８２間にサージ性ノイズが侵入した場合、バリ
スタ要素によりリード端子９を通してアース側に
バイパスされ、吸収される。また通常の高周波ノ
イズ成分は、コンデンサCsによりリード端子９
を通してアース側にバイパス吸収される。従つ
て、優れた高周波ノイズ除去作用を有するサージ
保護付ノイズフイルタを実現することができる。 FIG. 6 is an equivalent circuit diagram of the surge protection noise filter shown in FIG.
The circuit has an inductance L 1 between the lead terminal portion 82 and the lead terminal 9, and a parallel circuit of a varistor element and a capacitor Cs is connected between the lead terminal portion 82 and the lead terminal 9. In the above circuit configuration, the lead terminal portion 81
- 82, the surge noise is bypassed to the ground side through the lead terminal 9 by the varistor element and absorbed. In addition, normal high frequency noise components are removed by the capacitor Cs at the lead terminal 9.
It is bypass-absorbed to the ground side through. Therefore, it is possible to realize a noise filter with surge protection that has an excellent high-frequency noise removal effect.
次に第７図に示すものは、磁性体４のもう一方
の端面にも導電層６３を設け、該導電層６３上に
も同様のバリスタ７を取付けた構造となつてい
る。導電層６３上に取付けられたバリスタ７は、
焼結体７１の厚み方向の両面に電極７２，７３を
被着形成すると共に、厚み方向に貫通する貫通孔
７４を有してなり、導電層６３上に、貫通孔５，
７４が一致するようにして、電極７３を接着し、
更に電極７２に貫通導体８を半田付け固定してあ
る。ただし、バリスタ７，７の何れか一方は、誘
電体磁器コンデンサによつて構成することもでき
る。 Next, the one shown in FIG. 7 has a structure in which a conductive layer 63 is also provided on the other end surface of the magnetic body 4, and a similar varistor 7 is attached on the conductive layer 63 as well. The varistor 7 attached on the conductive layer 63 is
Electrodes 72 and 73 are formed on both sides of the sintered body 71 in the thickness direction, and a through hole 74 is formed through the conductive layer 63.
Glue the electrodes 73 so that the electrodes 74 match,
Furthermore, the through conductor 8 is fixed to the electrode 72 by soldering. However, either one of the varistors 7, 7 can also be constituted by a dielectric ceramic capacitor.
第８図は第７図に示したサージ保護付ノイズフ
イルタの等価回路図であり、リード端子部８１ー
８２間にインダクタンスL1を有し、リード端子
部８１及び８２とリード端子９との間にバリスタ
要素およびコンデンサCsの並列回路を接続した
π型回路となる。 FIG. 8 is an equivalent circuit diagram of the noise filter with surge protection shown in FIG. This is a π-type circuit in which a parallel circuit of a varistor element and a capacitor Cs is connected to the circuit.
以上述べたように、本考案によれば、次のよう
な効果が得られる。 As described above, according to the present invention, the following effects can be obtained.
(a) 酸化チタンを主成分とする焼結体でなるバリ
スタを備えるから、バリスタ特性によるサージ
性ノイズ成分除去作用と、誘電体特性による高
周波ノイズフイルタ作用とを有するサージ保護
付ノイズフイルタを提供できる。(a) Since it includes a varistor made of a sintered body mainly composed of titanium oxide, it is possible to provide a noise filter with surge protection that has a surge noise component removal effect due to varistor characteristics and a high frequency noise filter effect due to dielectric properties. .
(b) 軸方向の貫通孔を有し、かつ、外周面及び端
面に互いに導通する導電層を被着形成した筒状
の磁性体と、酸化チタンを主成分とする焼結体
の厚み方向の両面に対の電極を有すると共に厚
み方向に貫通する貫通孔を有してなり、前記磁
性体の端面における導電層上に、貫通孔が一致
するようにして、前記電極の一方を接着したバ
リスタと、前記貫通孔内を貫通して導出され前
記バリスタの前記電極の他方に導通接続させた
貫通導体と、前記磁性体の外周導電層上に導通
接続されたリード端子とを有するから、ノイズ
フイルタ要素として、インダクタンスとコンデ
ンサとを併せ持ち、優れたノイズフイルタ作用
を有するサージ保護付ノイズフイルタを提供す
ることができる。(b) A cylindrical magnetic body that has an axial through hole and a conductive layer that is electrically conductive to the outer circumferential surface and the end face, and a sintered body that is mainly composed of titanium oxide. A varistor having a pair of electrodes on both sides and a through hole penetrating in the thickness direction, and one of the electrodes is bonded onto the conductive layer on the end surface of the magnetic body so that the through hole coincides with the conductive layer. , the noise filter element has a through conductor led out through the through hole and electrically connected to the other electrode of the varistor, and a lead terminal electrically connected to the outer peripheral conductive layer of the magnetic material. As a result, it is possible to provide a noise filter with surge protection that has both an inductance and a capacitor and has an excellent noise filtering effect.
(c) 部品点数、工数の減少による小型化、高密度
実装化およびコストダウン等に寄与し得るサー
ジ保護付ノイズフイルタを提供できる。(c) It is possible to provide a noise filter with surge protection that can contribute to miniaturization, high-density packaging, cost reduction, etc. by reducing the number of parts and man-hours.
第１図Ａ，Ｂ，Ｃは従来のノイズフイルタの回
路図、第２図はバリスタの基本構造を説明する
図、第３図はその電圧電流特性図、第４図は同じ
くその等価回路図、第５図は本考案に係るサージ
保護付ノイズフイルタの断面図、第６図は同じく
その等価回路図、第７図は同じく他の実施例の断
面図、第８図は同じくその等価回路図である。
４……磁性体、５……貫通孔、６１，６２……
導電層、７……バリスタ、７１……焼結体、７
２，７３……電極、８……貫通導体、９……リー
ド端子。
Figures 1A, B, and C are circuit diagrams of conventional noise filters, Figure 2 is a diagram explaining the basic structure of a varistor, Figure 3 is its voltage-current characteristic diagram, and Figure 4 is its equivalent circuit diagram. Fig. 5 is a sectional view of a noise filter with surge protection according to the present invention, Fig. 6 is an equivalent circuit diagram thereof, Fig. 7 is a sectional view of another embodiment, and Fig. 8 is an equivalent circuit diagram thereof. be. 4...Magnetic material, 5...Through hole, 61, 62...
Conductive layer, 7... Varistor, 71... Sintered body, 7
2, 73...Electrode, 8...Through conductor, 9...Lead terminal.
Claims (1)
面に互いに導通する導電層を被着形成した筒状
の磁性体と、酸化チタンを主成分とする焼結体
の厚み方向の両面に対の電極を有すると共に厚
み方向に貫通する貫通孔を有してなり、前記磁
性体の前記端面における導電層上に、貫通孔が
一致するようにして、前記電極の一方を接着し
たバリスタと、前記貫通孔内を貫通して導出さ
れ前記バリスタの前記電極の他方に導通接続さ
せた貫通導体と、前記磁性体の外周導電層上に
導通接続されたリード端子とを有してなること
を特徴とするサージ保護付ノイズフイルタ。 (2) 前記バリスタは、前記磁性体の１端面に備え
られていることを特徴とする実用新案登録請求
の範囲第１項に記載のサージ保護付ノイズフイ
ルタ。 (3) 前記バリスタは、前記磁性体の両端面に備え
られていることを特徴とする実用新案登録請求
の範囲第１項に記載のサージ保護付ノイズフイ
ルタ。[Claims for Utility Model Registration] (1) A cylindrical magnetic material having a through hole in the axial direction and having a mutually conductive conductive layer deposited on the outer peripheral surface and end surface, and a material mainly composed of titanium oxide. a sintered body having a pair of electrodes on both sides in the thickness direction and a through hole penetrating in the thickness direction, the through hole being aligned on the conductive layer on the end surface of the magnetic body, A varistor to which one of the electrodes is bonded, a through conductor led out through the through hole and electrically connected to the other electrode of the varistor, and a lead electrically connected to the outer peripheral conductive layer of the magnetic material. A noise filter with surge protection characterized by having a terminal. (2) The noise filter with surge protection according to claim 1, wherein the varistor is provided on one end surface of the magnetic body. (3) The noise filter with surge protection according to claim 1, wherein the varistor is provided on both end surfaces of the magnetic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11109679U JPS6333369Y2 (en) | 1979-08-12 | 1979-08-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11109679U JPS6333369Y2 (en) | 1979-08-12 | 1979-08-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5629523U JPS5629523U (en) | 1981-03-20 |
| JPS6333369Y2 true JPS6333369Y2 (en) | 1988-09-06 |
Family
ID=29343589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11109679U Expired JPS6333369Y2 (en) | 1979-08-12 | 1979-08-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333369Y2 (en) |
-
1979
- 1979-08-12 JP JP11109679U patent/JPS6333369Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5629523U (en) | 1981-03-20 |
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