JPH0434909A - Transformer - Google Patents
TransformerInfo
- Publication number
- JPH0434909A JPH0434909A JP14220790A JP14220790A JPH0434909A JP H0434909 A JPH0434909 A JP H0434909A JP 14220790 A JP14220790 A JP 14220790A JP 14220790 A JP14220790 A JP 14220790A JP H0434909 A JPH0434909 A JP H0434909A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- transformer
- noise
- mode noise
- secondary winding
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 38
- 239000004020 conductor Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000004907 flux Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Regulation Of General Use Transformers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は変圧器に係り、特に波形整形交流しＣフィル
ターのりアクドル作用およびＥＭＩ（Ｅｌｅｃｔｒｏ
Ｍａｇｎｅｔｉｃ Ｉｎｔｅｒｆｅｒｅｎｃｅ）防止作
用をも備えるようにした変圧器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to transformers, and particularly to transformers that use waveform shaping, AC filter action, and electromagnetic interference (EMI).
The present invention relates to a transformer that also has a magnetic interference prevention function.
第５図ないし第８図は例えば特公昭５７−２４９２３号
公報に開示されたこの種従来の変圧器を示す、第５図は
その等価回路図、第６図は一部を断面で示す構造図、第
７図は第６図の■−■線の断面図である。図において、
（１）は変圧器の鉄心、（２）および（３）は鉄心脚（
ｌａ）に円筒状に巻回されたそれぞれ一次巻線および二
次巻線、（イ）は第８図にその単体図を示すように、所
定幅の帯状の磁性鋼板を積層して固めた磁性体間隔片で
、−次巻線（２）と二次巻線（３）との間の空隙部分に
周方向に沿って一定の間隔で挿入されている。Figures 5 to 8 show a conventional transformer of this type disclosed in Japanese Patent Publication No. 57-24923, for example. Figure 5 is an equivalent circuit diagram thereof, and Figure 6 is a structural diagram partially shown in cross section. , FIG. 7 is a sectional view taken along the line ■-■ in FIG. In the figure,
(1) is the transformer core, (2) and (3) are the core legs (
(a) is a primary winding and a secondary winding wound in a cylindrical shape, respectively, and (a) is a magnetic wire made by laminating and hardening strip-shaped magnetic steel plates of a predetermined width, as shown in Figure 8. The body spacing pieces are inserted into the gap between the secondary winding (2) and the secondary winding (3) at regular intervals along the circumferential direction.
変圧器としての基本的な動作は周知であるので説明を省
略するが、ここでは、両巻線（２１（３１間に磁性体間
隔片（イ）が挿入されているので、両巻線に電流が流れ
て発生するもれ磁束の回路磁気抵抗が減少しその結果こ
のもれ磁束量、従ってもれリアクタンスが増大する。第
５図のりアクタンス（５）はこれを等価的に示したもの
で、通常の変圧器のもれリアクタンスに比較して大きな
値のものとすることができる。Since the basic operation of a transformer is well known, the explanation will be omitted, but here, since a magnetic spacer (A) is inserted between both windings (21 (31), current flows through both windings). The circuit magnetic resistance of the leakage magnetic flux generated by the flow decreases, and as a result, the amount of leakage magnetic flux, and therefore the leakage reactance, increases.Glue actance (5) in Figure 5 shows this equivalently, The leakage reactance can be set to a larger value than the leakage reactance of a normal transformer.
従って、第５図に示すように、二次巻線（３）の出力回
路にコンデンサ（６）を接続し、その容量Ｃとすアクタ
ンス（（５）のインダクタンスＬとを適宜設定すること
により、ＬＣフィルターとして機能されることができる
。Therefore, as shown in FIG. 5, by connecting a capacitor (6) to the output circuit of the secondary winding (3) and appropriately setting its capacitance C and actance (inductance L of (5)), It can function as an LC filter.
例えば、この変圧器を、パワーエレクトロニクス素子を
使用したインバータ等の電源変圧器として使用すれば交
流ＬＣフィルターとして作用し、パワニレ素子のスイッ
チング動作によって発生するいわゆるノーマルモードノ
イズ（回路に直列に入るノイズ、正相雑音）はこのフィ
ルタ定数に従って減衰し、出力にはこれらスイッチング
ノイズのない整形された波形を得ることができる。For example, if this transformer is used as a power transformer for an inverter using power electronic elements, it will act as an AC LC filter, and the so-called normal mode noise (noise that enters the circuit in series) generated by the switching operation of the power inlet element, (positive sequence noise) is attenuated according to this filter constant, and a shaped waveform free of these switching noises can be obtained at the output.
従来のこの種変圧器は以上のように構成されているので
、回路と直列に入るノーマルモードノイズについては効
率的に低減することができるが、対地に対して回路の２
端子−括に発生するいわゆるコモンモードノイズ（同相
雑音）は、−次、二次巻線間の静電容量結合によって伝
搬し除去することができないという問題点があった。Conventional transformers of this type are configured as described above, so normal mode noise that enters in series with the circuit can be efficiently reduced.
There is a problem in that so-called common mode noise generated between the terminals and the terminals propagates through capacitance coupling between the negative and secondary windings and cannot be removed.
この発明は以上のような問題点を解消するためになされ
たもので、ノーマルモードノイズに加えてコモンモード
ノイズも除去することができる変圧器を得ることを目的
とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a transformer that can remove common mode noise in addition to normal mode noise.
この発明に係る変圧器は、その各次巻線毎にその外面全
体を覆うシールド導体を設けこのシールド導体を接地し
たものである。In the transformer according to the present invention, a shield conductor covering the entire outer surface of each secondary winding is provided and this shield conductor is grounded.
例えば−次巻線に侵入したコモンモードノイズは、−次
巻線を覆うシールド導体から大地に逃げ２次巻線側へは
伝搬しない。For example, common mode noise that has entered the -order winding escapes from the shield conductor covering the -order winding to the ground and does not propagate to the secondary winding.
第１図ないし第４図はこの発明の一実施例による変圧器
を示すもので、第１図はその等価回路図、第２図は一部
を断面で示す構造図、第３図は第２図のｌｌ−１［線の
断面図、第４図は特に静電容量を表示した等価回路図で
ある０図において、（１）ないしく６）は従来と同一の
もので説明を省略する。ｍは一次巻線（２）の外面全体
を覆うシールド導体で、鉄心脚（ｌａ）に対して１ター
ンを形成しないよう考慮されている。（８）は二次巻線
（３）の外面全体を覆う同様のシールド導体である。そ
して、両シールド導体（７）（８）から導出された端子
Ｓ１およびＳ２は鉄心（１）からの端子Ｓ３とともに大
地に接地される。1 to 4 show a transformer according to an embodiment of the present invention, FIG. 1 is an equivalent circuit diagram thereof, FIG. 2 is a structural diagram partially shown in cross section, and FIG. In FIG. 4, which is a cross-sectional view taken along line 11-1, and FIG. m is a shield conductor that covers the entire outer surface of the primary winding (2), and is designed not to form one turn with respect to the core leg (la). (8) is a similar shield conductor covering the entire outer surface of the secondary winding (3). Terminals S1 and S2 led out from both shield conductors (7) and (8) are grounded together with terminal S3 from the iron core (1).
この場合、各シールド導体口（８）はそれぞれ−次巻線
（２）または二次巻線（３）の外面全体を覆うように形
成されているので、両者間の静電容量Ｃ１゜Ｃ２（第４
図参照）は数千〜致方ＰＦに及ぶ大きな値となる。従っ
て、例えば−次巻線（２）にコモンモードノイズが侵入
してもこの大きな静電容量Ｃ１により大地にバイパスさ
れ二次巻線（３）へ伝わらない。逆に、二次巻線（３］
から侵入したノイズは静電容量Ｃ２により大地にバイパ
スされ同様に一次巻線（２）へ伝わらない。In this case, each shield conductor port (8) is formed so as to cover the entire outer surface of the secondary winding (2) or the secondary winding (3), so that the capacitance C1°C2 ( Fourth
(see figure) has a large value ranging from several thousand to a full PF. Therefore, for example, even if common mode noise enters the negative winding (2), it is bypassed to the ground due to this large capacitance C1 and is not transmitted to the secondary winding (3). Conversely, the secondary winding (3)
Noise that enters from the coil is bypassed to the ground by the capacitance C2 and similarly does not reach the primary winding (2).
リアクタンス（５１およびコンデンサ（６）によりノー
マルモードノイズを除去する点は従来と同様である。The point that normal mode noise is removed by reactance (51) and capacitor (6) is the same as in the conventional case.
また、各シールド導体（至）８と鉄心（１）との間の静
電容量（第４図にＣ３，Ｃ４で示す）はＣ１やＣ２の値
より小さいが、極めて高周波のものやサージ状のノイズ
の場合にはシールド導体（７）等の局部的な電位分布を
平坦化してノイズを実質的に低減する。In addition, the capacitance between each shield conductor (to) 8 and the iron core (1) (indicated by C3 and C4 in Figure 4) is smaller than the value of C1 and C2, but it can be In the case of noise, the local potential distribution of the shield conductor (7) etc. is flattened to substantially reduce the noise.
なお、上記実施例では一次巻線（２１と二次巻線（３）
との両者にシールド導体を設けたが、いずれか−方に設
けるようにしてもコモンモードノイズを低減する効果は
認められる。In addition, in the above embodiment, the primary winding (21) and the secondary winding (3)
Although shield conductors were provided on both sides, the effect of reducing common mode noise can be recognized even if the shield conductor is provided on either side.
以上のように、この発明では各次巻線毎にその外面全体
を覆うシールド導体を設けこのシールド導体を接地する
ようにしたので、ノーマルモードノイズに加えてコモン
モードノイズについてもその除去が可能となる。As described above, in this invention, a shield conductor that covers the entire outer surface of each secondary winding is provided and this shield conductor is grounded, making it possible to eliminate common mode noise in addition to normal mode noise. Become.
第１図はこの発明の一実施例による変圧器を示す等価回
路図、第２図は一部を断面で示す構造図、第３図は第２
図の■−■線の断面図、第４図は特に静電容量を表示し
た等価回路図、第５図および第６図は従来のものを示す
それぞれ等価回路図および構造図、第７図は第６図の■
−■線の断面図、第８図は磁性体間隔片（２）を単体で
示す斜視図である。
図において、（１）は鉄心、（２１および（３）はそれ
ぞれ−次巻線および二次巻線、（２）は磁性体間隔片、
（７）（へ）はシールド導体である。
なお、各図中同一符号は同一または相当部分を示す。
代理人 弁理士 大 岩 増 雄
第２図
第３図FIG. 1 is an equivalent circuit diagram showing a transformer according to an embodiment of the present invention, FIG. 2 is a structural diagram showing a part of the transformer in cross section, and FIG.
Figure 4 is an equivalent circuit diagram showing the capacitance in particular, Figures 5 and 6 are equivalent circuit diagrams and structural diagrams showing conventional ones, and Figure 7 is a cross-sectional view taken along the line ■-■ in the figure. ■ in Figure 6
8 is a perspective view showing the magnetic material spacing piece (2) alone. In the figure, (1) is an iron core, (21 and (3) are a secondary winding and a secondary winding, respectively, (2) is a magnetic material spacing piece,
(7) (f) is a shield conductor. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent: Masuo Oiwa, Patent Attorney Figure 2 Figure 3
Claims (1)
巻線と、上記両巻線間に挿入され上記両巻線間のもれ磁
束の増大を図る磁性体間隔片とを備えたものにおいて、 上記各次巻線毎にその外面全体を覆うシールド導体を設
けこのシールド導体を接地したことを特徴とする変圧器
。[Claims] An iron core, primary and secondary windings wound around the legs of the iron core, and a magnetic body inserted between the two windings to increase leakage magnetic flux between the two windings. A transformer comprising a spacer piece, characterized in that a shield conductor covering the entire outer surface of each of the secondary windings is provided and this shield conductor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14220790A JPH0434909A (en) | 1990-05-30 | 1990-05-30 | Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14220790A JPH0434909A (en) | 1990-05-30 | 1990-05-30 | Transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0434909A true JPH0434909A (en) | 1992-02-05 |
Family
ID=15309889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14220790A Pending JPH0434909A (en) | 1990-05-30 | 1990-05-30 | Transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434909A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005048451A1 (en) * | 2003-11-12 | 2005-05-26 | Matsushita Electric Industrial Co., Ltd. | Communication transformer |
| CN105575639A (en) * | 2014-10-17 | 2016-05-11 | 国家电网公司 | Broadband current transformer |
| WO2020204023A1 (en) * | 2019-04-02 | 2020-10-08 | 株式会社ニフコ | Cord fastener |
-
1990
- 1990-05-30 JP JP14220790A patent/JPH0434909A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005048451A1 (en) * | 2003-11-12 | 2005-05-26 | Matsushita Electric Industrial Co., Ltd. | Communication transformer |
| US7573363B2 (en) | 2003-11-12 | 2009-08-11 | Panasonic Corporation | Communication transformer for power line communication |
| CN105575639A (en) * | 2014-10-17 | 2016-05-11 | 国家电网公司 | Broadband current transformer |
| CN105575639B (en) * | 2014-10-17 | 2018-06-01 | 国家电网公司 | A kind of wideband current transformer |
| WO2020204023A1 (en) * | 2019-04-02 | 2020-10-08 | 株式会社ニフコ | Cord fastener |
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