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JPH02159800A - Electromagnetic shield body - Google Patents

Electromagnetic shield body

Info

Publication number
JPH02159800A
JPH02159800A JP31558588A JP31558588A JPH02159800A JP H02159800 A JPH02159800 A JP H02159800A JP 31558588 A JP31558588 A JP 31558588A JP 31558588 A JP31558588 A JP 31558588A JP H02159800 A JPH02159800 A JP H02159800A
Authority
JP
Japan
Prior art keywords
conductor
metal foil
printed wiring
wiring board
electromagnetic
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
Application number
JP31558588A
Other languages
Japanese (ja)
Inventor
Michihiro Shimoide
下出 道弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP31558588A priority Critical patent/JPH02159800A/en
Publication of JPH02159800A publication Critical patent/JPH02159800A/en
Pending legal-status Critical Current

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  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

PURPOSE:To enable an electromagnetic shield piece to retain its performance even if an insulator is deformed by a method wherein a conductor is housed and held in a cavity, which is provided to the insulator and whose clearance is larger than the thickness of the conductor, without keeping the conductor fixed. CONSTITUTION:A conductor 3 of a metal foil or the like is housed and held in a cavity, which is provided to insulators 2a-2c and whose clearance is larger than the thickness of the conductor, without keeping the conductor fixed. When the insinuators 2a and 2b are deformed due to moisture or heat, an unusual force is prevented from acting on the conductor 3, because a gap is provided between the conductor 3 and the insulators 2a and 2b. Therefore, the metal foil 3 is protected from cracks and able to shut off electromagnetic noises generated from a primary circuit. By this setup, an electromagnetic shield piece of this design can retain a shielding effect, and a printed wiring board is formed of this electromagnetic shield piece, so that a device can be manufactured at a low cost.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、インバータ装置等において制御回路を電磁
誘導ノイズから保護するための電磁シールド体に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic shield for protecting a control circuit in an inverter device or the like from electromagnetic induction noise.

ド体を示す構成図であり2図において、(1)は従来の
電磁ノイズの影響を防ぐためのシールド体、シールド体
(1)の構成は、絶縁材料(2a)、 (2bl金属箔
(3)、及び接着剤(4)から成っている。(5)はイ
ンバータ装置のケース、(6)は制御回路を搭載してい
る印刷配線板、インバータ装置の主な主回路構成は(7
)の平滑コンデンサ、(8)のコンバータ[E回路、 
(9)のインバータ回路から成っている。
In Figure 2, (1) is a conventional shield body for preventing the influence of electromagnetic noise, and the structure of the shield body (1) is an insulating material (2a), (2bl metal foil (3 ), and adhesive (4). (5) is the case of the inverter device, (6) is the printed wiring board on which the control circuit is mounted, and the main circuit configuration of the inverter device is (7).
) smoothing capacitor, (8) converter [E circuit,
It consists of the inverter circuit (9).

なお、シールド体(1)は、絶縁材料(2a)、 (2
b、)の間、金属箔(3)をはさみ込み、接合面全体を
接着剤(4)にて接着して製造されている。
In addition, the shield body (1) is made of insulating materials (2a), (2
It is manufactured by sandwiching a metal foil (3) between b and ) and bonding the entire joint surface with an adhesive (4).

次にシールド体の作用について第4図より説明する。電
源がインバータ装置に入力され コンバータ回路(8)
により整流され、平滑コンデンサ(7)により直流電圧
に変換される。この直流電圧は。
Next, the function of the shield body will be explained with reference to FIG. Power is input to the inverter device and the converter circuit (8)
The voltage is rectified by a smoothing capacitor (7) and converted into a DC voltage. This DC voltage is.

インバータ回路(9)により可変周波数の交流電圧に変
換され誘導電動機を可変速運転する。その際主回路部品
である平滑コンデンサ(7)、インバータ回路(9)は
、高周波(約1.5kJIz)で動作しているため電磁
誘導ノイズが発生する。その電磁誘導リイズにより制御
回路を搭載している印刷配線板(6)がインバータ装置
のケース(5)に取付けられた状態でかつ真下に、主回
路部品があるとき、制御回路が誤動作する。そのためシ
ールド板(1)を印刷配線板(6)の真下に取付けてい
る。主回路部品からの電磁誘導ノイズ(磁界)は、シー
ルド体(1)内の金属箔(3)に、ビオ・サバールの法
則により、うず電流を発生させ、このうず電流による磁
界が主回路部品から発生する電磁ノイズ(磁界)を打ち
消し電磁ノイズを遮へいする。
The inverter circuit (9) converts the voltage into an alternating current voltage with variable frequency to operate the induction motor at variable speed. At this time, the main circuit components, the smoothing capacitor (7) and the inverter circuit (9), operate at a high frequency (approximately 1.5 kJIz), so electromagnetic induction noise is generated. Due to the electromagnetic induction, the control circuit malfunctions when the printed wiring board (6) on which the control circuit is mounted is attached to the case (5) of the inverter device and there are main circuit components directly below it. Therefore, the shield plate (1) is attached directly below the printed wiring board (6). Electromagnetic induction noise (magnetic field) from the main circuit components generates eddy currents in the metal foil (3) inside the shield body (1) according to the Biot-Savart law, and the magnetic field due to this eddy current is generated from the main circuit components. Cancels generated electromagnetic noise (magnetic field) and shields electromagnetic noise.

[発明が解決しようとする課題] 従来のシールド体は、以[−のように構成されているの
で、湿気又は熱で、絶縁材料(2a)、 (2b)が変
形したとき第p閃のように金属箔に亀裂が生じ。
[Problem to be Solved by the Invention] Since the conventional shield body is configured as shown below, when the insulating materials (2a) and (2b) are deformed due to moisture or heat, the Cracks appeared in the metal foil.

その部分は、うず電流が流れないため主回路から発生す
る電磁誘導ノイズを打ち消すことが出来ずシールド体の
効果がなくなり、制御回路が誤動作する。又、このシー
ルド体は印刷配線板(6)の真下に配置するため取りつ
けられる装置の構造が複雑になり作業性も悪いなどの問
題点かあった。
Since no eddy current flows in that part, the electromagnetic induction noise generated from the main circuit cannot be canceled out, and the shield becomes ineffective, causing the control circuit to malfunction. Further, since this shield body is placed directly under the printed wiring board (6), there are problems such as the structure of the device to which it is attached becomes complicated and the workability is poor.

この発明は1.I:記のような問題点を解消するために
なされたもので、湿気又は、熱で絶縁体か変形しても、
効果がある電磁/−ルド体を得ることを目的とする。ま
た、従来のシールド体をなくし構造の簡単な作業性のよ
い装置を得ることを目的とする。
This invention consists of 1. I: This was done to solve the problems mentioned above, and even if the insulator is deformed by moisture or heat,
The purpose is to obtain an effective electromagnetic/radial body. Another object of the present invention is to eliminate the conventional shield body and obtain a device with a simple structure and good workability.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る電磁シールド体は金属箔などの導電体を
固定せずに、導電体の厚さ以上の隙間をもつ部分ではさ
む絶縁体を備えたものである。
The electromagnetic shield according to the present invention does not fix a conductor such as a metal foil, but includes an insulator sandwiched between parts having a gap greater than the thickness of the conductor.

また、この電磁シールド体の絶縁体に電気回路用の配線
を設け、電磁シールド体を印刷配線板としたものである
Moreover, wiring for an electric circuit is provided on the insulator of this electromagnetic shield, and the electromagnetic shield is made into a printed wiring board.

〔作用〕[Effect]

この発明における電磁シールド体は、隙間により、湿気
又は熱で、絶縁体が変形しても内部の導電体には影響は
なく、電磁誘導シールド効果を低減しない。また、この
電磁シールド体を印刷配線板とすることにより従来のシ
ールド体をなくすことができる。
In the electromagnetic shielding body of the present invention, even if the insulator is deformed by moisture or heat due to the gap, the internal conductor is not affected and the electromagnetic induction shielding effect is not reduced. Further, by using a printed wiring board as the electromagnetic shield, the conventional shield can be eliminated.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第1
図において、 (2al (2b)、 (2c)は、絶
縁材料(3)は導電体である金属箔である。
An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (2al (2b), (2c)), the insulating material (3) is a metal foil that is a conductor.

次に、一実施例のシールド板の作用及び製法について第
1図より説明する。
Next, the function and manufacturing method of the shield plate of one embodiment will be explained with reference to FIG.

湿気又は熱で絶縁材料(2a)、 (2b)が変形した
時絶縁材料(2a)、 (2b)と金属箔(3)との間
には、空間が設けられているため、金属箔(3)に無理
な力が加わらない。よって金属箔(3)が亀裂すること
がなく、主回路から発生する電磁誘導ノイズを遮へいす
ることができる。
When the insulating materials (2a), (2b) are deformed due to moisture or heat, there is a space between the insulating materials (2a), (2b) and the metal foil (3). ) Do not apply excessive force to the Therefore, the metal foil (3) does not crack, and electromagnetic induction noise generated from the main circuit can be shielded.

次に、製法について説明する。2分割された絶縁材料(
2a)、(2b)の間に、金属箔(3)を入れ金属箔(
3)のまわりを絶縁材料(2c)ではさみ、絶縁材料(
2c)と2分割した絶縁材料(2a)、 (2b)を接
着剤(4)で接着する。
Next, the manufacturing method will be explained. Insulating material divided into two parts (
Insert metal foil (3) between 2a) and (2b).
3) is sandwiched between insulating material (2c), and the insulating material (
2c) and the two divided insulating materials (2a) and (2b) are glued together with adhesive (4).

次に、この発明の他の実施例を図について説明する。第
2図において、(6)は、この発明に係る電磁シールド
体を用いた印刷配線板、 (2dX2e)は絶縁材料を
用いた分割された印刷配線板、 (2c)は絶縁材料(
12)は、印刷配線板に搭載される部品の足と金属箔と
を絶縁するための絶縁管、 (+3)は絶縁管(12)
を通す孔である。
Next, another embodiment of the invention will be described with reference to the drawings. In FIG. 2, (6) is a printed wiring board using the electromagnetic shielding body according to the present invention, (2dX2e) is a divided printed wiring board using an insulating material, and (2c) is an insulating material (
12) is an insulating tube for insulating the legs of parts mounted on the printed wiring board and metal foil, (+3) is an insulating tube (12)
It is a hole that passes through.

次に、この実施例のシールド板の作用及び製法について
第2図より説明する。ノイズの発生源は従来技術の作用
、動作にて説明したことと同一である。湿気又は熱で、
印刷配線板(2dl (2e)と絶縁材料(2c)か変
形した時、印刷配線板(2d)、 (2e)と金属箔(
3)との間には、空間か設けられているため金属箔(3
)に無理な力が加わらない。よって金属箔(3)が亀裂
することがなく、主回路から発生する電磁誘導ノイズを
遮へいすることができる。このように印刷配線板(2d
l (2e)内に、シールド作用する金属箔(3)を内
蔵したことにより従来のシールド板をなくすことができ
る。
Next, the function and manufacturing method of the shield plate of this embodiment will be explained with reference to FIG. The noise generation source is the same as that explained in the function and operation of the prior art. humidity or heat,
When printed wiring board (2dl (2e) and insulating material (2c) are deformed, printed wiring board (2d), (2e) and metal foil (
There is a space between the metal foil (3) and
) Do not apply excessive force to the Therefore, the metal foil (3) does not crack, and electromagnetic induction noise generated from the main circuit can be shielded. In this way, printed wiring board (2d
The conventional shield plate can be eliminated by incorporating the metal foil (3) that acts as a shield inside the (2e).

次に、製法について説明する。2分割された印刷配線板
(2d)、 (2e)の間に、金属箔(3)を入れ金属
箔(3)のまわりを絶縁材料(2c)ではさみ、絶縁材
料(2c)と2分割した印刷配線板(2d)、 (2e
)を接着剤(4)で接着する。なお、印刷配線板(2d
)、(2e)に搭載される部品の足は、金属箔(3)と
触れないようにするため絶縁管(12)にて絶縁する。
Next, the manufacturing method will be explained. A metal foil (3) is placed between the two divided printed wiring boards (2d) and (2e), and the metal foil (3) is sandwiched between an insulating material (2c) and the insulating material (2c) is divided into two parts. Printed wiring board (2d), (2e
) with adhesive (4). In addition, printed wiring board (2d
), (2e) are insulated with insulating tubes (12) to prevent them from coming into contact with the metal foil (3).

 この絶縁管(12)は、孔(13)に配置され固定さ
れる。
This insulating tube (12) is placed and fixed in the hole (13).

なお、−h記実施例において、シールド体は、電磁誘導
ノイズを遮へいするものを示したが、空中輻射ノイズ、
静電誘導ノイズも遮へいでき、上記実施と同様の効果を
奏する。また、1−記実施例で、印刷配線板を2分割し
その中に金属箔を入れシールドしたものについて説明し
たが、その金属箔を制御電源ライン、アースライン、又
はコモンラインとして使用してもよく、上記実施例と同
様の効果を奏する。この場合は部品取り付は用の絶縁管
はなくてもよい。また+J″、記実施例では、金属箔を
絶縁体の間に隙間がある例を示したが、隙間がなくても
よく、金属箔と絶縁体が固定されていなければよい。
In addition, in the example described in -h, the shield body was shown as one that shields electromagnetic induction noise, but airborne radiation noise,
Electrostatic induction noise can also be shielded, producing the same effect as the above implementation. In addition, in Example 1-2, the printed wiring board was divided into two parts and a metal foil was placed inside to shield the printed wiring board, but the metal foil could also be used as a control power supply line, a ground line, or a common line. In many cases, the same effects as in the above embodiment can be achieved. In this case, there is no need for an insulating tube for attaching parts. Further, in the above embodiment, there is a gap between the metal foil and the insulator, but there may be no gap as long as the metal foil and the insulator are not fixed.

また、上記実施例では、絶縁材料(2c)を用いて隙間
を設けた例を示したが第3図に示すように他の方法によ
り隙間ができれば隙間用の絶縁材料(2C)はなくても
よい。
In addition, in the above embodiment, an example was shown in which a gap was created using the insulating material (2c), but as shown in FIG. good.

また、−1−記実施例では2両面とも絶縁材料(2a)
(2b)か印刷配線板(2d)(2e)の場合を示した
が、−面が絶縁材料で他面が印刷配線板でもよい。
In addition, in the example described in -1-, both surfaces were made of insulating material (2a).
(2b), printed wiring boards (2d) and (2e) are shown, but the - side may be an insulating material and the other side may be a printed wiring board.

また、l二記実施例では、インバータ装置の場合を例に
したが その他の装置であってもよい。
Further, in the second embodiment, an inverter device is used as an example, but other devices may be used.

〔発明の効果〕〔Effect of the invention〕

以−にのように、この発明によれば、電磁シールド体を
湿気又は、熱で外形が変形しても、金属箔などの導電体
には、亀裂が生じないように構成したので、シールド効
果を保持でき、かつ印刷配線板をこの電磁シールド体で
構成したので装置が安価にでき、また、誤動作の少ない
ものが得られる効果がある。
As described above, according to the present invention, even if the outer shape of the electromagnetic shield is deformed due to moisture or heat, the conductor such as metal foil is configured so that no cracks occur in the conductor, so that the shielding effect is improved. Since the electromagnetic shielding body can hold the electromagnetic shield, and the printed wiring board is constructed of this electromagnetic shielding body, the device can be manufactured at low cost and has the effect of being less likely to malfunction.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、この発明に係る電磁シールド体を示す図、第
2図は、この発明に係る電磁シールド体を用いた印刷配
線板を示す図、第3図は、この発明に係る電磁シールド
体の他の実施例を示す同第4図は、従来のシールド体を
示す図、第5図は従来の7一ルド体亀裂の内容を示す図
。 図において、(1)はシールド板、 (2a)、 (2
b)、 (2c)は絶縁材料、 (2d)、 (2e)
は印刷配線板、(3)は金属箔(4)は接着剤、(5)
はケース、(6)は印刷配線板、(7)は平滑コンデン
サ、(8)はコンバータ回路、  (9)はインバータ
回路、 (12)は絶縁管である。 なお1図中、同一符号は、同−又は、相当の部品を示す
FIG. 1 is a diagram showing an electromagnetic shielding body according to the present invention, FIG. 2 is a diagram showing a printed wiring board using the electromagnetic shielding body according to the present invention, and FIG. 3 is a diagram showing an electromagnetic shielding body according to the present invention. FIG. 4, which shows another embodiment of the invention, is a diagram showing a conventional shield body, and FIG. 5 is a diagram showing the contents of a conventional 7-1 shield body crack. In the figure, (1) is a shield plate, (2a), (2
b), (2c) are insulating materials, (2d), (2e)
is printed wiring board, (3) is metal foil, (4) is adhesive, (5)
is a case, (6) is a printed wiring board, (7) is a smoothing capacitor, (8) is a converter circuit, (9) is an inverter circuit, and (12) is an insulating tube. In addition, in FIG. 1, the same reference numerals indicate the same or equivalent parts.

Claims (2)

【特許請求の範囲】[Claims] (1)以下の要素をもつ電磁シールド体 (a)導電体, (b)導電体を固定せず,導電体の厚さ以上の隙間をも
つ部分で導電体をはさむ絶 縁体。
(1) An electromagnetic shielding body that has the following elements: (a) an electric conductor; (b) an insulator that does not fix the electric conductor and sandwiches the electric conductor with a gap greater than the thickness of the conductor;
(2)特許請求の範囲第1項記載の電磁シールド体にお
いて,電磁シールド体を印刷配線板 としたことを特徴とする電磁シールド体。
(2) An electromagnetic shielding body according to claim 1, characterized in that the electromagnetic shielding body is a printed wiring board.
JP31558588A 1988-12-14 1988-12-14 Electromagnetic shield body Pending JPH02159800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31558588A JPH02159800A (en) 1988-12-14 1988-12-14 Electromagnetic shield body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31558588A JPH02159800A (en) 1988-12-14 1988-12-14 Electromagnetic shield body

Publications (1)

Publication Number Publication Date
JPH02159800A true JPH02159800A (en) 1990-06-19

Family

ID=18067125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31558588A Pending JPH02159800A (en) 1988-12-14 1988-12-14 Electromagnetic shield body

Country Status (1)

Country Link
JP (1) JPH02159800A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016036219A (en) * 2014-08-04 2016-03-17 パナソニックIpマネジメント株式会社 DC-DC converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016036219A (en) * 2014-08-04 2016-03-17 パナソニックIpマネジメント株式会社 DC-DC converter

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