JPH0767275B2 - Switching power supply - Google Patents
Switching power supplyInfo
- Publication number
- JPH0767275B2 JPH0767275B2 JP16405086A JP16405086A JPH0767275B2 JP H0767275 B2 JPH0767275 B2 JP H0767275B2 JP 16405086 A JP16405086 A JP 16405086A JP 16405086 A JP16405086 A JP 16405086A JP H0767275 B2 JPH0767275 B2 JP H0767275B2
- Authority
- JP
- Japan
- Prior art keywords
- primary
- voltage
- power supply
- switching power
- high frequency
- 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 - Lifetime
Links
Landscapes
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は雑音対策のために、シールド構造を有するスイ
ッチング電源に関するものである。Description: TECHNICAL FIELD The present invention relates to a switching power supply having a shield structure for noise suppression.
従来の技術 従来、この種のスイッチング電源は、第３図に示すよう
な構成であった。第３図において、１はフィルターブロ
ックであり、雑音端子電圧を低減する。２は１次整流平
滑ブロックであり、入力した交流電圧を直流電圧に変換
する。３はスイッチング素子であり、前記直流電圧を所
定のデューティ比と周波数を有する高周波交流電圧に変
換する。４は高周波絶縁トランスであり、前記高周波交
流電圧を２次側へ伝達する。５は２次整流平滑ブロック
であり、前記高周波絶縁トランス４の２次巻線に発生し
た高周波交流電圧を直流電圧に変換し出力する。１−1,
1−2,1−3,1−4,6,7は雑音対策用に設けられたコンデン
サで、１次−２次間にまたがるため、二重絶縁として２
個直列に接続されている。2. Description of the Related Art Conventionally, this type of switching power supply has a configuration as shown in FIG. In FIG. 3, 1 is a filter block, which reduces the noise terminal voltage. Reference numeral 2 is a primary rectifying / smoothing block, which converts an input AC voltage into a DC voltage. A switching element 3 converts the DC voltage into a high frequency AC voltage having a predetermined duty ratio and frequency. Reference numeral 4 is a high frequency isolation transformer, which transmits the high frequency AC voltage to the secondary side. A secondary rectifying / smoothing block 5 converts a high frequency AC voltage generated in the secondary winding of the high frequency insulating transformer 4 into a DC voltage and outputs the DC voltage. 1-1,
1-2, 1-3, 1-4, 6, and 7 are capacitors provided as a noise countermeasure, and since they span between the primary and secondary sides, they are double-insulated.
They are connected in series.
発明が解決しようとする問題点 このような従来の構成では前記雑音対策用コンデンサの
部品点数が多く、さらに１次−２次間絶縁要求の厳しい
場合には、１次−２次間の安定電位部分を容量結合させ
れば雑音低減が可能であっても、コンデンサを使用でき
ず、前記フィルターブロック１での負担が多大になると
いう問題であった。Problems to be Solved by the Invention In such a conventional configuration, the noise suppression capacitor has a large number of parts, and when the primary-secondary insulation requirement is strict, the stable potential between the primary-secondary is stable. Even if noise can be reduced by capacitively coupling the parts, a capacitor cannot be used, and the load on the filter block 1 becomes large.
本発明はこのような問題点を解決するもので、１次−２
次間にコンデンサを使用することなく、両者の安定電位
部分を容量結合させることにより、雑音除去効果を得る
ことを目的としたものである。The present invention solves such problems, and it is
The purpose is to obtain a noise elimination effect by capacitively coupling both stable potential portions without using a capacitor between the two.
問題点を解決するための手段 この問題点を解決するために本発明は、従来輻射雑音対
策に用いられていた箔状導電材料のシールド板を２枚設
け、一方を１次側安定電位部、他方を２次側安定電位部
に接続し、前記２枚のシールド板を所定の厚みを有する
板又は箔状の絶縁材料をはさみ込むように設置した構成
にしたものである。Means for Solving the Problems In order to solve this problem, the present invention provides two shield plates made of a foil-shaped conductive material, which has been conventionally used as a countermeasure against radiation noise, and one of which is a primary side stable potential portion, The other is connected to the secondary side stable potential portion, and the two shield plates are installed so as to sandwich a plate or foil-shaped insulating material having a predetermined thickness.
作用 この構成により、１次側シールド板と２次側シールド板
は、等価的に平行板コンデンサの構造を有することにな
り、１次−２次側安定電位部分間には、１次−２次側シ
ールド板の対向面積をS,絶縁材料の厚みをd,絶縁材料の
導電率をεとすると、εS/dの容量を有することにな
り、コンデンサを用いた場合と同様の雑音除去効果を得
ることができる。Operation With this configuration, the primary-side shield plate and the secondary-side shield plate equivalently have a parallel-plate capacitor structure, and between the primary-secondary stable potential portion, the primary-secondary If the opposing area of the side shield plate is S, the thickness of the insulating material is d, and the conductivity of the insulating material is ε, it has a capacitance of εS / d, and the same noise reduction effect as when using a capacitor is obtained. be able to.
実施例 第１図は本発明の一実施例によるスイッチング電源の構
成図であり、第１図において、11はフィルターブロッ
ク、12は１次整流平滑ブロック、13はスイッチング素
子、14は少なくとも１次巻線,2次巻線を有する高周波絶
縁トランス、15は２次整流平滑ブロックであり、これら
の機能，動作は第３図の従来例と同様である。16は１次
側シールド板であり、その電位は１次整流平滑後の基準
電位に、17は２次側シールド板で、その電位は２次整流
平滑後の基準電位に落としてある。18は１次−２次側シ
ールド板16,17の絶縁に挿入された絶縁材料であり、前
記１次側シールド板16と前記２次側シールド板17は、前
記絶縁材料18をはさみ込む構造となっている。この構造
により、前記１次側シールド板16と前記２次側シールド
板17は、絶縁材料18を介して容量結合し、輻射雑音対策
という機能に加え、第３図の従来構成例のコンデンサ１
−2,1−4,6,7の機能も兼ねることができる。Embodiment FIG. 1 is a block diagram of a switching power supply according to an embodiment of the present invention. In FIG. 1, 11 is a filter block, 12 is a primary rectifying and smoothing block, 13 is a switching element, and 14 is at least a primary winding. A high-frequency insulating transformer having a wire and a secondary winding, and 15 is a secondary rectifying / smoothing block, and their functions and operations are the same as those of the conventional example shown in FIG. Reference numeral 16 is a primary side shield plate, the potential of which is reduced to the reference potential after primary rectification and smoothing, and 17 is the secondary side shield plate, the potential of which is reduced to the reference potential after secondary rectification and smoothing. 18 is an insulating material inserted in the insulation of the primary-secondary side shield plates 16 and 17, and the primary side shield plate 16 and the secondary side shield plate 17 have a structure in which the insulating material 18 is sandwiched. Has become. With this structure, the primary-side shield plate 16 and the secondary-side shield plate 17 are capacitively coupled via the insulating material 18, and in addition to the function of preventing radiation noise, the capacitor 1 of the conventional configuration example of FIG.
The functions of −2,1−4,6,7 can also be combined.
第２図は本発明の、高周波絶縁トランス14に本発明のシ
ールド構造を有したものである。第２図において、16は
１次側シールド板、17は２次側シールド板、18は絶縁材
料であり、これらの機能は前記実施例で述べた通りであ
る。19はコア、20は１次,2次巻線を施したボビン、21は
１次側シールド引出しリード線で、15は２次側シールド
引出しリード線である。FIG. 2 shows the high frequency insulating transformer 14 of the present invention having the shield structure of the present invention. In FIG. 2, 16 is a primary side shield plate, 17 is a secondary side shield plate, and 18 is an insulating material, and these functions are as described in the above embodiment. Reference numeral 19 is a core, 20 is a bobbin having primary and secondary windings, 21 is a primary side shield lead-out lead wire, and 15 is a secondary side shield lead-out lead wire.
発明の効果 以上のように本発明によれば、１次,2次安定電位部分両
側に設けたシールド板とその間にはさみ込まれた絶縁材
料により、１次−２次間に容量結合を起こさせ、従来の
輻射雑音対策に加え、１次−２次間にコンデンサを接続
した場合と同様の雑音対策効果を得ることができる上、
部品点数削減，電源の小型が可能となり実用的にきわめ
て有用である。EFFECTS OF THE INVENTION As described above, according to the present invention, the capacitive coupling between the primary and the secondary is caused by the shield plates provided on both sides of the primary and secondary stable potential portions and the insulating material sandwiched therebetween. In addition to the conventional radiation noise countermeasure, the same noise countermeasure effect as when a capacitor is connected between the primary and secondary sides can be obtained.
It is practically very useful because it can reduce the number of parts and downsize the power supply.
第１図は本発明の一実施例によるスイッチング電源の構
成図、第２図は本発明の高周波絶縁トランスの外観図、
第３図は従来のシールド構造を示す構造図である。 11……フィルターブロック、12……１次整流平滑ブロッ
ク、13……スイッチング素子、14……高周波絶縁トラン
ス、15……２次整流平滑ブロック、16……１次側シール
ド板、17……２次側シールド板、18……絶縁材料、19…
…コア、20……ボビン、21……１次側シールド引出しリ
ード線、22……２次側シールド引出しリード線。FIG. 1 is a configuration diagram of a switching power supply according to an embodiment of the present invention, FIG. 2 is an external view of a high frequency insulation transformer of the present invention,
FIG. 3 is a structural diagram showing a conventional shield structure. 11 …… Filter block, 12 …… Primary rectifying / smoothing block, 13 …… Switching element, 14 …… High-frequency insulation transformer, 15 …… Secondary rectifying / smoothing block, 16 …… Primary side shield plate, 17 …… 2 Secondary shield plate, 18 ... Insulating material, 19 ...
… Core, 20 …… bobbin, 21 …… Primary side shield lead wire, 22 …… Secondary shield lead wire.
Claims (1)
チング素子によって、所定のデューティ比と周波数を有
する高周波交流電圧に変換し、少なくとも１次側巻線と
２次側巻線を有する高周波絶縁トランスによって負荷側
に伝達し、再び整流・平滑することにより、所定の直流
出力電圧を得るように構成され、１次側と２次側および
１次側と大地アース間が絶縁され、輻射雑音対策に用い
る箔状導電材料のシールド板を２枚設け、一方を１次側
安定電位、他方を２次側安定電位部に接続し、前記２枚
のシールド板を板又は箔状の絶縁材料をはさみ込むよう
に設置したスイッチング電源。1. A high frequency wave having at least a primary winding and a secondary winding, which receives an AC voltage, rectifies the AC voltage, converts the AC voltage into a high frequency AC voltage having a predetermined duty ratio and a frequency by a switching element. It is configured to obtain a predetermined DC output voltage by transmitting it to the load side by an insulating transformer and then rectifying and smoothing it again. The primary side and the secondary side, and the primary side and the earth ground are insulated and radiation noise is generated. Two shield plates made of foil-shaped conductive material used for countermeasures are provided, one of which is connected to the primary side stable potential and the other of which is connected to the secondary side stable potential part. Switching power supply installed so as to be sandwiched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16405086A JPH0767275B2 (en) | 1986-07-11 | 1986-07-11 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16405086A JPH0767275B2 (en) | 1986-07-11 | 1986-07-11 | Switching power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6318964A JPS6318964A (en) | 1988-01-26 |
| JPH0767275B2 true JPH0767275B2 (en) | 1995-07-19 |
Family
ID=15785842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16405086A Expired - Lifetime JPH0767275B2 (en) | 1986-07-11 | 1986-07-11 | Switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0767275B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3311391B2 (en) * | 1991-09-13 | 2002-08-05 | ヴィエルティー コーポレーション | Leakage inductance reducing transformer, high frequency circuit and power converter using the same, and method of reducing leakage inductance in transformer |
| JPH08234001A (en) * | 1995-02-24 | 1996-09-13 | Asahi Glass Co Ltd | Antireflection optical article |
| EP0775765B1 (en) * | 1995-11-27 | 2004-02-04 | Vlt Corporation | Plating permeable cores |
| JP3714870B2 (en) | 2000-12-28 | 2005-11-09 | セントラル硝子株式会社 | Transparent fluorine-containing copolymer |
| EP1253445A1 (en) | 2001-04-27 | 2002-10-30 | Asahi Glass Co., Ltd. | Filter for plasma display panel |
| CN1246708C (en) | 2001-06-25 | 2006-03-22 | 旭硝子株式会社 | Optical film |
| JP4774991B2 (en) | 2003-09-03 | 2011-09-21 | 旭硝子株式会社 | Spatial light modulation element and spatial light modulation method |
| JP4938994B2 (en) | 2005-04-22 | 2012-05-23 | ペンタックスリコーイメージング株式会社 | Silica airgel membrane and manufacturing method thereof |
| US8029871B2 (en) | 2005-06-09 | 2011-10-04 | Hoya Corporation | Method for producing silica aerogel coating |
| WO2007077722A1 (en) | 2006-01-05 | 2007-07-12 | Asahi Glass Company, Limited | Fluorine-containing polymer and fluorine-containing polymer composition containing same |
-
1986
- 1986-07-11 JP JP16405086A patent/JPH0767275B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6318964A (en) | 1988-01-26 |
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