JP3540938B2 - LC filter and its composite - Google Patents

LC filter and its composite Download PDF

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Publication number
JP3540938B2
JP3540938B2 JP11180698A JP11180698A JP3540938B2 JP 3540938 B2 JP3540938 B2 JP 3540938B2 JP 11180698 A JP11180698 A JP 11180698A JP 11180698 A JP11180698 A JP 11180698A JP 3540938 B2 JP3540938 B2 JP 3540938B2
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Prior art keywords
band
filter
lead
terminal
shaped
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JPH11308066A (en
Inventor
康浩 大熊
一男 黒木
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Description

【０００１】
【発明の属する技術分野】
この発明は、電力または電気信号を伝達する線路に挿設され、電力または電気信号に含まれる高周波ノイズを除去するＬＣフィルタとその複合体に関する。
【０００２】
【従来の技術】
従来のこの種のＬＣフィルタにおいては、個別に製作されたリアクトルとコンデンサとを接続することにより形成されたものが知られている。
図９は、ＬＣフィルタの第１の従来例を示す回路構成図であり、リアクトルＬ１の一端を端子Ｔ１３とし、リアクトルＬ１の他端とコンデンサＣ１の一端とを接続して端子Ｔ１４とし、コンデンサＣ１の他端を端子Ｔ１５とするＬＣフィルタを示し、端子Ｔ１３と端子Ｔ１４との間には電力または電気信号の主電流を流し、端子Ｔ１５には該主電流に含まれるノイズ電流を流すようにしている。
【０００３】
図１０は、ＬＣフィルタの第２の従来例を示す回路構成図であり、リアクトルＬ１の一端を端子Ｔ１３とし、リアクトルＬ１の他端とコンデンサＣ１の一端とを接続して端子Ｔ１４とし、リアクトルＬ２の一端を端子Ｔ１６とし、リアクトルＬ２の他端とコンデンサＣ２の一端とを接続して端子Ｔ１７とし、リアクトルＬ３の一端を端子Ｔ１９とし、リアクトルＬ３の他端とコンデンサＣ３の一端とを接続して端子Ｔ２０とし、コンデンサＣ１，Ｃ２，Ｃ３それぞれの他端を並列に接続して端子Ｔ２２としたＬＣフィルタを示し、端子Ｔ１３と端子Ｔ１４との間，端子Ｔ１６と端子Ｔ１７との間，端子Ｔ１９と端子Ｔ２０との間それぞれには電力または電気信号の主電流を流し、端子Ｔ２２には該主電流に含まれるノイズ電流を流すように構成した、いわゆる３相スター結線のＬＣフィルタ複合体である。
【０００４】
図１１は、ＬＣフィルタの第３の従来例を示す回路構成図であり、リアクトルＬ１の一端を端子Ｔ１３とし、リアクトルＬ１の他端とコンデンサＣ１の一端とを接続して端子Ｔ１４とし、リアクトルＬ２の一端を端子Ｔ１６とし、リアクトルＬ２の他端とコンデンサＣ２の一端とを接続して端子Ｔ１７とし、リアクトルＬ３の一端を端子Ｔ１９とし、リアクトルＬ３の他端とコンデンサＣ３の一端とを接続して端子Ｔ２０とし、コンデンサＣ１の他端を端子Ｔ１５とし、コンデンサＣ２の他端を端子Ｔ１８とし、コンデンサＣ３の他端を端子Ｔ２１とし、端子１５と端子１６とを接続し、端子１８と端子１９とを接続し 端子２１と端子１３とを接続した構成のいわゆる３相デルタ結線のＬＣフィルタ複合体である。
【０００５】
【発明が解決しようとする課題】
図９〜図１１に示したＬＣフィルタとその複合体においては、構成するリアクトルとコンデンサとはそれぞれ個別に製作されているため、下記▲１▼〜▲３▼に示すような問題点があった。
▲１▼．結果として、ＬＣフィルタの外形、体積が大きくなる。
【０００６】
▲２▼．リアクトル、コンデンサそれぞれを個別に固定するための取り付け板など
が必要である。
▲３▼．個別に製作したリアクトルとコンデンサとを組み込むために、組み立て工
数が増加する。
この発明の目的は、上記を解決するＬＣフィルタを提供することにある。
【０００７】
【課題を解決するための手段】この第１の発明は、両端に引出し端子をそれぞ
れ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体と、このＬＣフィルタ本体の中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、前記第１の帯状導体の引出し端子間には電力または電気信号の主電流を流し、前記第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにしたＬＣフィルタを複数（ｎ）組備え、第ｋ（ｋ＝１から（ｎ−１）まで）組目のＬＣフィルタの第２の帯状導体の引出し端子と、第（ｋ＋１）組目のＬＣフィルタの第１の帯状導体の一方の引出し端子とを接続し、第ｎ組目のＬＣフィルタの第２の帯状導体の引出し端子と、第１組目のＬＣフィルタの第１の帯状導体の一方の引出し端子とを接続した構成のＬＣフィルタ複合体にする。
【０００８】
第２の発明は、両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数組と、このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とを備え、前記それぞれの第１の帯状導体の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにした構成のＬＣフィルタ複合体にする。
【０００９】
第３の発明は、両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数組と、このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、前記それぞれの第１の帯状導体の両端の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにし、それぞれの第２の帯状導体の引出し端子を並列に接続した構成のＬＣフィルタ複合体にする。
【００１０】
さらに第４の発明は、両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数（ｎ）組と、このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、前記それぞれの第１の帯状導体の両端の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにし、第ｋ（ｋ＝１から（ｎ−１）まで）組目のＬＣフィルタ本体の第２の帯状導体の引出し端子と、第（ｋ＋１）組目のＬＣフィルタ本体の第１の帯状導体の一方の引出し端子とを接続し、
第ｎ組目のＬＣフィルタ本体の第２の帯状導体の引出し端子と、第１組目のＬＣフィルタ本体の第１の帯状導体の一方の引出し端子とを接続した構成のＬＣフィルタ複合体にする。
【００１１】
この発明によれば前記ＬＣフィルタ本体の中空部を貫通するように磁性体を配置することにより、前記第１，第２の帯状導体それぞれはリアクトルを形成し、さらに該第１，第２の帯状導体間に配置した帯状誘電体により、それぞれの帯状導体を電極としたコンデンサが形成され、この等価回路はＬＣフィルタになる。
【００１４】
【発明の実施の形態】図１は、この発明の第１〜第 4 の発明の実施例を説明するためのＬＣフィルタ単体の模式的概念図であり、図１（イ）は外形図、図１（ロ）はそのＡ−Ａ部の断面図をそれぞれ示す。図１において、１はＬＣフィルタ本体、２は磁性体、Ｔ１，Ｔ２，Ｔ３はＬＣフィルタ本体１から引き出された端子を示す。
【００１５】
また図２は、図１に示したＬＣフィルタ本体１の中空に巻く前の段階での模式的概念図を示す。
図２において、１１は第１の帯状導体としての帯状導体、１２は帯状誘電体、１３は第２の帯状導体としての帯状導体、１４は帯状絶縁体それぞれを示し、図示の如く、帯状導体１１と帯状誘電体１２と帯状導体１３と帯状絶縁体１４とを順に積層した形状を有し、帯状導体１１の両端には引出し端子Ｔ１とＴ２とを備え、帯状導体１３の一端には引出し端子Ｔ３を備えている。
【００１６】
図３は、図１に示したＬＣフィルタの等価回路を示し、ＬＣフィルタ本体１の中空部を貫通するように磁性体２を配置することにより、帯状導体１１，１３それぞれはリアクトルを形成し、さらに帯状導体１１と帯状導体１３との間に配置した帯状誘電体１２により、帯状導体１１，１３それぞれを電極とした図示の破線の如きコンデンサを形成している。
【００１７】
なお、図２において、端子Ｔ１と端子Ｔ２との間には電力または電気信号の主電流を流し、端子Ｔ３には該主電流に含まれるノイズ電流を流すことから、図示の如く、帯状導体１１の断面の厚さを、帯状導体１３の断面の厚さに比して大きく設定してもよい。図４は、この発明の第１〜第 4 の実施例を説明するためのＬＣフィルタ複合体の回路構成図であり、図１に示したＬＣフィルタ３組のそれぞれの端子Ｔ３を並列に接続した、いわゆる３相スター結線のＬＣフィルタ複合体を形成している。
【００１８】
図５は、この発明の第１の実施例を示すＬＣフィルタ複合体の回路構成図であり、図１に示したＬＣフィルタを３組備え、端子Ｔ３U とＴ１V とを接続し、端子Ｔ３V とＴ１W とを接続し、端子Ｔ３W とＴ１U とを接続した、いわゆる３相デルタ結線のＬＣフィルタ複合体を形成している。なお図４〜図５に示した実施例においては、ＬＣフィルタ３組からなるＬＣフィルタ複合体について説明をしたが、例えば、ＬＣフィルタ２組からなるＬＣフィルタ複合体についても適用できる。
【００１９】
図６は、この発明の第２の実施例を示すＬＣフィルタ複合体の模式的概念図であり、図６（イ）は外形図、図６（ロ）は図６（イ）のＡ−Ａ部の断面図をそれぞれ示す。図６において、３１〜３３はＬＣフィルタ本体、３４は磁性体、Ｔ４〜Ｔ６はＬＣフィルタ本体３１から引き出された端子、Ｔ７〜Ｔ９はＬＣフィルタ本体３２から引き出された端子、Ｔ１０〜Ｔ１２はＬＣフィルタ本体３３から引き出された端子をそれぞれ示す。
【００２０】
図６に示したＬＣフィルタ本体３１〜３３それぞれは、図２に示したＬＣフィルタ本体１の模式的概念図と同様構成にしている。図７は、この発明の第３の実施例を示すＬＣフィルタ複合体の回路構成図であり、図６に示したＬＣフィルタ複合体の端子Ｔ６と端子Ｔ９と端子Ｔ１２とを並列に接続した、いわゆる３相スター結線のＬＣフィルタ複合体を形成している。
【００２１】
図８は、この発明の第４の実施例を示すＬＣフィルタ複合体の回路構成図であり、図６に示したＬＣフィルタ複合体の端子Ｔ６と端子Ｔ７とを接続し、端子Ｔ９と端子Ｔ１０を接続し、端子Ｔ１２と端子Ｔ４とを接続した構成のいわゆる３相デルタ結線のＬＣフィルタ複合体を形成している。なお図６〜図８に示した実施例においては、ＬＣフィルタ本体３組と１個の磁性体か
らなるＬＣフィルタ複合体について説明をしたが、例えば、ＬＣフィルタ本体２組と１個の磁性体からなるＬＣフィルタ複合体についても適用できる。
【００２２】
【発明の効果】
この発明によれば、ＬＣフィルタまたはＬＣフィルタ複合体を構成する際に、従来はリアクトルとコンデンサとを個別に製作したもので行っていたが、１度の製作工程でＬＣフィルタまたはＬＣフィルタ複合体を製作でき、その引出し端子の接続で結線方法が変更できるので、このＬＣフィルタまたはＬＣフィルタ複合体の小型軽量化および製作時間の削減による量産効果とコストダウンが計れる。
【００２３】
特に近年、放射ノイズに対する種々の法的規制が敷かれた半導体電力変換回路のノイズフィルタとして好適である。
【図面の簡単な説明】
【図１】この発明の第１〜第 4 の実施例を説明するためのＬＣフィルタ単体の模式的概念図
【図２】図１の部分を示す模式的概念図
【図３】図１の等価回図
【図４】この発明の第１〜第 4 の実施例を説明するためのＬＣフィルタ複合体の回路構成図
【図５】この発明の第１の実施例を示すＬＣフィルタ複合体の回路構成図
【図６】この発明の第２の実施例を示すＬＣフィルタ複合体の模式的概念図
【図７】この発明の第３の実施例を示すＬＣフィルタ複合体の回路構成図
【図８】この発明の第４の実施例を示すＬＣフィルタ複合体の回路構成図
【図９】従来例を示すＬＣフィルタの回路構成図
【図１０】従来例を示すＬＣフィルタの回路構成図
【図１１】従来例を示すＬＣフィルタの回路構成図[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an LC filter inserted into a line for transmitting a power or electric signal and removing high frequency noise included in the power or the electric signal, and a composite thereof.
[0002]
[Prior art]
As a conventional LC filter of this type, a filter formed by connecting a separately manufactured reactor and a capacitor is known.
FIG. 9 is a circuit configuration diagram showing a first conventional example of an LC filter. One end of a reactor L1 is a terminal T13, the other end of the reactor L1 is connected to one end of a capacitor C1, and a terminal T14 is connected. Shows an LC filter having the other end as a terminal T15, in which a main current of electric power or an electric signal flows between a terminal T13 and a terminal T14, and a noise current included in the main current flows to a terminal T15. I have.
[0003]
FIG. 10 is a circuit configuration diagram showing a second conventional example of an LC filter. One end of a reactor L1 is used as a terminal T13, the other end of the reactor L1 is connected to one end of a capacitor C1, and a terminal T14 is used. Is connected to the other end of the reactor L2 and one end of the capacitor C2 to form a terminal T17, one end of the reactor L3 is connected to the terminal T19, and the other end of the reactor L3 is connected to one end of the capacitor C3. This shows an LC filter having a terminal T20 and a terminal T22 formed by connecting the other ends of the capacitors C1, C2, and C3 in parallel, and a terminal T13 and a terminal T14, a terminal T16 and a terminal T17, and a terminal T19. A main current of electric power or an electric signal flows between the terminal T20 and the terminal T22, and a noise current included in the main current flows to the terminal T22. It was a LC filter composite of so-called three-phase star connection.
[0004]
FIG. 11 is a circuit diagram showing a third conventional example of an LC filter. One end of a reactor L1 is used as a terminal T13, the other end of the reactor L1 is connected to one end of a capacitor C1, and a terminal T14 is used. Is connected to the other end of the reactor L2 and one end of the capacitor C2 to form a terminal T17, one end of the reactor L3 is connected to the terminal T19, and the other end of the reactor L3 is connected to one end of the capacitor C3. The terminal T20, the other end of the capacitor C1 is a terminal T15, the other end of the capacitor C2 is a terminal T18, the other end of the capacitor C3 is a terminal T21, the terminals 15 and 16 are connected, and the terminals 18 and 19 are connected. And a so-called three-phase delta connection LC filter composite having a configuration in which the terminal 21 and the terminal 13 are connected to each other.
[0005]
[Problems to be solved by the invention]
In the LC filter and the composite thereof shown in FIGS. 9 to 11, the constituent reactors and capacitors are individually manufactured, and thus have the following problems (1) to (3). .
▲ 1 ▼. As a result, the outer shape and volume of the LC filter increase.
[0006]
▲ 2 ▼. A mounting plate for fixing each reactor and capacitor individually is required.
(3). The incorporation of individually manufactured reactors and capacitors increases the number of assembly steps.
An object of the present invention is to provide an LC filter that solves the above.
[0007]
According to the first aspect of the present invention, there is provided a first strip conductor having lead terminals at both ends, a strip dielectric, a second strip conductor having a lead terminal at one end, and a strip insulation. And a magnetic body that is arranged so as to penetrate the hollow portion of the LC filter main body to form a magnetic circuit. A plurality of (n) sets of LC filters are provided between the extraction terminals to allow a main current of electric power or an electric signal to flow, and the extraction terminals of the second strip conductor to flow a noise current included in the main current. a lead terminal of the second band-shaped conductor of the k-th (k = 1 to (n−1))-th LC filter, and one lead-out terminal of the first band-shaped conductor of the (k + 1) -th LC filter Are connected, and the n-th set of LC filters An extraction terminal of the second strip conductor, and the LC filter composite having the configuration connecting the one lead terminal of the first strip conductor of the first pair in the LC filter.
[0008]
According to a second aspect of the present invention, a first band-shaped conductor having a lead terminal at each end, a band-shaped dielectric, a second band-shaped conductor having a lead terminal at one end, and a band-shaped insulator are sequentially laminated to form a hollow body. A plurality of sets of wound LC filter bodies; and a magnetic body arranged to penetrate the hollow portion of each of the LC filter bodies to form a magnetic circuit, and between the lead terminals of the respective first band-shaped conductors. An LC filter composite having a configuration in which a main current of an electric power or an electric signal is caused to flow, and a noise current included in the main current is caused to flow to a lead terminal of each of the second band-shaped conductors.
[0009]
According to a third aspect of the present invention, a first band conductor having a lead terminal at each end, a band dielectric, a second band conductor having a lead terminal at one end, and a band insulator are sequentially laminated to form a hollow body. A plurality of sets of wound LC filter bodies; and a magnetic body arranged to penetrate the hollow portion of each of the LC filter bodies to form a magnetic circuit, between the lead terminals at both ends of each of the first strip-shaped conductors. The main current of electric power or an electric signal flows through the lead terminals of the respective second band-shaped conductors, so that the noise current included in the main current flows through the lead-out terminals of the respective second band-shaped conductors. To form an LC filter complex having a configuration connected to.
[0010]
Further, a fourth invention provides a hollow structure in which a first band-shaped conductor having a lead-out terminal at both ends, a band-shaped dielectric, a second band-shaped conductor having a lead-out terminal at one end, and a band-shaped insulator are sequentially laminated. A plurality of (n) sets of LC filter main bodies wound around each other, and a magnetic body arranged to penetrate the hollow portion of each of the LC filter main bodies to form a magnetic circuit, and both ends of each of the first band-shaped conductors The main current of the electric power or the electric signal flows between the extraction terminals of the second band-shaped conductor, and the noise current included in the main current flows through the extraction terminals of the respective second band-shaped conductors. (n-1)) connecting the lead-out terminal of the second band-shaped conductor of the LC filter body of the set to one of the first band-shaped conductors of the (k + 1) -th set of LC filter main body;
An LC filter composite having a configuration in which the lead-out terminal of the second band-shaped conductor of the n-th set of LC filter bodies and one lead-out terminal of the first band-shaped conductor of the first set of LC filter bodies are connected. .
[0011]
According to this invention, each of the first and second band-shaped conductors forms a reactor by disposing a magnetic material so as to penetrate the hollow portion of the LC filter body, and further, the first and second band-shaped conductors are formed. The band-shaped dielectrics disposed between the conductors form capacitors each having the band-shaped conductor as an electrode, and this equivalent circuit becomes an LC filter.
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic conceptual view of a single LC filter for explaining embodiments of the first to fourth aspects of the present invention. FIG. 1 (b) is a cross-sectional view taken along the line AA. In FIG. 1, reference numeral 1 denotes an LC filter main body, 2 denotes a magnetic body, and T1, T2, and T3 denote terminals drawn from the LC filter main body 1.
[0015]
FIG. 2 is a schematic conceptual view of the LC filter main body 1 shown in FIG. 1 before being wound into a hollow space.
In FIG. 2, reference numeral 11 denotes a band-shaped conductor as a first band-shaped conductor, 12 denotes a band-shaped dielectric, 13 denotes a band-shaped conductor as a second band-shaped conductor, and 14 denotes a band-shaped insulator. , A strip-shaped dielectric 12, a strip-shaped conductor 13, and a strip-shaped insulator 14 are sequentially laminated. The strip-shaped conductor 11 is provided with lead terminals T1 and T2 at both ends thereof. It has.
[0016]
FIG. 3 shows an equivalent circuit of the LC filter shown in FIG. 1. By arranging the magnetic body 2 so as to penetrate the hollow part of the LC filter main body 1, each of the strip conductors 11 and 13 forms a reactor. Further, a capacitor as shown by a dashed line in the figure using the strip conductors 11 and 13 as electrodes is formed by the strip dielectric 12 disposed between the strip conductor 11 and the strip conductor 13.
[0017]
In FIG. 2, a main current of electric power or an electric signal flows between the terminal T1 and the terminal T2, and a noise current included in the main current flows to the terminal T3. May be set to be larger than the thickness of the cross section of the strip-shaped conductor 13. FIG. 4 is a circuit configuration diagram of an LC filter composite for explaining the first to fourth embodiments of the present invention, in which three terminals T3 of three sets of LC filters shown in FIG. 1 are connected in parallel. , Forming a so-called three-phase star-connected LC filter complex.
[0018]
FIG. 5 is a circuit diagram of an LC filter composite according to a first embodiment of the present invention. The three sets of LC filters shown in FIG. 1 are provided, terminals T3U and T1V are connected, and terminals T3V and T1W are connected. To form a so-called three-phase delta-connected LC filter complex in which the terminals T3W and T1U are connected. Although the embodiment shown in FIGS. 4 and 5 has been described with respect to the LC filter composite including three sets of LC filters, the present invention is also applicable to an LC filter composite including two sets of LC filters.
[0019]
FIG. 6 is a schematic conceptual view of an LC filter composite showing a second embodiment of the present invention. FIG. 6 (a) is an external view, and FIG. 6 (b) is AA of FIG. 6 (a). FIG. In FIG. 6, 31 to 33 are LC filter main bodies, 34 is a magnetic body, T4 to T6 are terminals drawn from the LC filter main body 31, T7 to T9 are terminals drawn from the LC filter main body 32, and T10 to T12 are LCs. The terminals drawn from the filter main body 33 are shown.
[0020]
Each of the LC filter main bodies 31 to 33 shown in FIG. 6 has the same configuration as the schematic conceptual diagram of the LC filter main body 1 shown in FIG. FIG. 7 is a circuit configuration diagram of an LC filter composite according to a third embodiment of the present invention, in which terminals T6, T9, and T12 of the LC filter composite shown in FIG. 6 are connected in parallel. A so-called three-phase star connection LC filter composite is formed.
[0021]
FIG. 8 is a circuit diagram of an LC filter composite according to a fourth embodiment of the present invention, in which terminals T6 and T7 of the LC filter composite shown in FIG. 6 are connected, and terminals T9 and T10 are connected. To form a so-called three-phase delta-connected LC filter composite having a configuration in which the terminal T12 and the terminal T4 are connected. In the embodiment shown in FIGS. 6 to 8, the LC filter composite including three sets of LC filter bodies and one magnetic body has been described. For example, two sets of LC filter bodies and one magnetic body The present invention can also be applied to an LC filter composite consisting of
[0022]
【The invention's effect】
According to the present invention, when an LC filter or an LC filter composite is formed, conventionally, a reactor and a capacitor are separately manufactured, but the LC filter or the LC filter composite is manufactured in a single manufacturing process. Can be manufactured and the connection method can be changed by connecting the lead terminals, so that the mass production effect and cost reduction can be achieved by reducing the size and weight of the LC filter or the LC filter composite and reducing the manufacturing time.
[0023]
In particular, it is suitable as a noise filter for a semiconductor power conversion circuit in which various legal restrictions have been imposed on radiation noise in recent years.
[Brief description of the drawings]
FIG. 1 is a schematic conceptual diagram of an LC filter alone for describing first to fourth embodiments of the present invention; FIG. 2 is a schematic conceptual diagram showing a portion of FIG. 1; FIG. FIG. 4 is a circuit configuration diagram of an LC filter composite for explaining first to fourth embodiments of the present invention. FIG. 5 is a circuit of an LC filter composite showing a first embodiment of the present invention. FIG. 6 is a schematic conceptual diagram of an LC filter composite according to a second embodiment of the present invention. FIG. 7 is a circuit configuration diagram of an LC filter composite according to a third embodiment of the present invention. FIG. 9 is a circuit configuration diagram of an LC filter composite according to a fourth embodiment of the present invention. FIG. 9 is a circuit configuration diagram of an LC filter according to a conventional example. FIG. 10 is a circuit configuration diagram of an LC filter according to a conventional example. Circuit diagram of an LC filter showing a conventional example

Claims (4)

両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体と、
このＬＣフィルタ本体の中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、
前記第１の帯状導体の引出し端子間には電力または電気信号の主電流を流し、前記第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにしたＬＣフィルタを複数（ｎ）組備え、
第ｋ（ｋ＝１から（ｎ−１）まで）組目のＬＣフィルタの第２の帯状導体の引出し端子と、第（ｋ＋１）組目のＬＣフィルタの第１の帯状導体の一方の引出し端子とを接続し、
第ｎ組目のＬＣフィルタの第２の帯状導体の引出し端子と、第１組目のＬＣフィルタの第１の帯状導体の一方の引出し端子とを接続したことを特徴とするＬＣフィルタ複合体。A first band-shaped conductor having a lead-out terminal at each end, a band-shaped dielectric, a second band-shaped conductor having a lead-out terminal at one end, and a band-shaped insulator laminated in this order, and an LC filter body wound in a hollow state; ,
A magnetic material that is arranged to penetrate the hollow portion of the LC filter body to form a magnetic circuit,
A plurality of LC filters are arranged so that a main current of electric power or an electric signal flows between the lead terminals of the first band-shaped conductor and a noise current included in the main current flows through the lead terminal of the second band-shaped conductor. (N) Prepare a set,
An extraction terminal of the second band-shaped conductor of the k-th (k = 1 to (n-1))-th set of LC filters and one extraction terminal of the first band-shaped conductor of the (k + 1) -th set of the LC filters And connect
An LC filter composite, wherein an extraction terminal of a second strip conductor of an n-th set of LC filters is connected to one extraction terminal of a first strip conductor of a first set of LC filters. 両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数組と、
このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とを備え、
前記それぞれの第１の帯状導体の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにしたことを特徴とするＬＣフィルタ複合体。A plurality of LC filter bodies each formed by sequentially laminating a first band-shaped conductor having a lead-out terminal at both ends, a band-shaped dielectric, a second band-shaped conductor having a lead-out terminal at one end, and a band-shaped insulator; Pairs and
A magnetic body that is arranged so as to penetrate the hollow portion of each of the LC filter main bodies to form a magnetic circuit,
A main current of electric power or an electric signal is caused to flow between the lead terminals of the respective first strip conductors, and a noise current included in the main current is caused to flow to the lead terminals of the respective second strip conductors. An LC filter composite, comprising: 両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数組と、このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、
前記それぞれの第１の帯状導体の両端の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにし、
それぞれの第２の帯状導体の引出し端子を並列に接続したことを特徴とするＬＣフィルタ複合体。A plurality of LC filter bodies each formed by sequentially laminating a first band-shaped conductor having a lead-out terminal at both ends, a band-shaped dielectric, a second band-shaped conductor having a lead-out terminal at one end, and a band-shaped insulator; And a magnetic body that is arranged so as to penetrate the hollow portion of each of the LC filter bodies to form a magnetic circuit,
A main current of power or an electric signal is caused to flow between the lead terminals at both ends of each of the first strip conductors, and a noise current included in the main current is caused to flow to the lead terminals of the respective second strip conductors. West,
An LC filter composite, wherein the lead terminals of the respective second strip conductors are connected in parallel. 両端に引出し端子をそれぞれ有する第１の帯状導体と、帯状誘電体と、一端に引出し端子を有する第２の帯状導体と、帯状絶縁体とを順に積層したものを中空に巻いたＬＣフィルタ本体複数（ｎ）組と、
このＬＣフィルタ本体それぞれの中空部を貫通するように配置して磁気回路を形成する磁性体とからなり、
前記それぞれの第１の帯状導体の両端の引出し端子間には電力または電気信号の主電流を流し、前記それぞれの第２の帯状導体の引出し端子には該主電流に含まれるノイズ電流を流すようにし、
第ｋ（ｋ＝１から（ｎ−１）まで）組目のＬＣフィルタ本体の第２の帯状導体の引出し端子と、第（ｋ＋１）組目のＬＣフィルタ本体の第１の帯状導体の一方の引出し端子とを接続し、
第ｎ組目のＬＣフィルタ本体の第２の帯状導体の引出し端子と、第１組目のＬＣフィルタ本体の第１の帯状導体の一方の引出し端子とを接続したことを特徴とするＬＣフィルタ複合体。A plurality of LC filter bodies each formed by sequentially laminating a first band-shaped conductor having a lead-out terminal at both ends, a band-shaped dielectric, a second band-shaped conductor having a lead-out terminal at one end, and a band-shaped insulator; (N) pairs,
A magnetic body that is arranged so as to penetrate the hollow portion of each of the LC filter bodies to form a magnetic circuit,
A main current of power or an electric signal is caused to flow between the lead terminals at both ends of each of the first strip conductors, and a noise current included in the main current is caused to flow to the lead terminals of the respective second strip conductors. West,
A lead terminal of the second band-shaped conductor of the k-th (k = 1 to (n-1))-th LC filter body and one of the first band-shaped conductors of the (k + 1) -th LC filter body. Connect with the drawer terminal,
An LC filter composite comprising: a lead-out terminal of a second band-shaped conductor of an n-th set of LC filter bodies and one lead-out terminal of a first band-shaped conductor of a first set of LC filter bodies. body.
JP11180698A 1998-04-22 1998-04-22 LC filter and its composite Expired - Fee Related JP3540938B2 (en)

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US4746557A (en) * 1985-12-09 1988-05-24 Murata Manufacturing Co., Ltd. LC composite component
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