JPH03150816A - Voltage divider - Google Patents

Abstract

PURPOSE:To obtain a voltage divider having a small size and a high dividing voltage by equally dividing the electrostatic capacity of a capacitor formed of a first electrode, a second dielectric and a second electrode into a plurality of segments, and connecting the segments in series. CONSTITUTION:A first capacitor of an electrostatic capacity C1 is composed of a wire conductor 1, a second dielectric 2 and first electrodes 3, 3', and a second capacitor of an electrostatic capacity C24 is composed of a first electrode 3, a second dielectric 4 and a second electrode 5. A third capacitor of an electrostatic capacity C22 is formed of a first electrode 3', a second dielectric 4, and a second electrode 5'. Here, since the electrodes 3, 3', the dielectrics 4, 4' and the electrodes 5, 5, are equally divided, C24=C22. Further, a fourth capacitor is formed of second electrodes 5, 5' and a stray capacity C3 to the ground. Thus, a voltage divider having a small size and a high dividing voltage can be obtained.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、交流電圧の電圧変換を行う分圧器に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a voltage divider for converting alternating current voltage.

従来の技術 従来、この種の分圧器は、第３図に示すような構成であ
った。第３図において、３１は電線導体部、３２は上記
電線導体部３１の周囲に設けた第１誘電体部、３３は上
記第１誘電体部３２の外周に設けた第１電極、３４は上
記第１電極３３と電圧検出器の第１の入力端子とを電気
的に接続するための第１端子、３５は上記第１電極３３
を囲むようにして設けた第２誘電体部、３６は上記第２
誘電体部３５の外周に設けた第２電極、３７は上記第２
電極３６と電圧検出器の第２の入力端子とを電気的に接
続するための第２端子である。BACKGROUND OF THE INVENTION Conventionally, this type of voltage divider has had a configuration as shown in FIG. In FIG. 3, 31 is a wire conductor portion, 32 is a first dielectric portion provided around the wire conductor portion 31, 33 is a first electrode provided on the outer periphery of the first dielectric portion 32, and 34 is the above-mentioned A first terminal for electrically connecting the first electrode 33 and the first input terminal of the voltage detector; 35 is the first terminal 33 of the first electrode 33;
A second dielectric portion 36 is provided to surround the second dielectric portion.
A second electrode 37 provided on the outer periphery of the dielectric portion 35 is
This is a second terminal for electrically connecting the electrode 36 and the second input terminal of the voltage detector.

以下動作について説明する。まず、上記電線導体部３１
と上記第１電極３３は、上記第１誘電体部３２を介在す
ることにより静電容量Ｃ１の第１コンデンサを構成する
。次に上記第１電極３３と上記第２電極３６と上記第２
誘電体部３５で静電容量Ｃ２の第２コンデンサを構成す
る。また上上紀２電極３６と大地間の浮遊容量Ｃ３によ
り第３コンデンサが構成される。The operation will be explained below. First, the electric wire conductor portion 31
The first electrode 33 constitutes a first capacitor having a capacitance C1 with the first dielectric portion 32 interposed therebetween. Next, the first electrode 33, the second electrode 36, and the second electrode
The dielectric portion 35 constitutes a second capacitor having a capacitance C2. Further, a third capacitor is constituted by the stray capacitance C3 between the upper 2nd electrode 36 and the ground.

以上の各コンデンサの接続関係を第４図に等価回路で示
した。第４図において、４１は第１コンデンサ、４２は
第２コンデンサ、４３は第３コンデンサ、４４は大地、
４５は上記電線導体部と大地間に接続されている電源、
４６は電圧検出器に接続する第１電極、４７は同じく電
圧検出器に接続する第２電極である。上記電源４５の電
源電圧をｖＨとすると、上記第１電極４６、上記第２電
極４７間に出力される二次電圧Ｖ’ＯＵＴは次式で表す
ことができる。The connection relationship of each of the above capacitors is shown in an equivalent circuit in FIG. In FIG. 4, 41 is the first capacitor, 42 is the second capacitor, 43 is the third capacitor, 44 is the ground,
45 is a power supply connected between the electric wire conductor and the ground;
46 is a first electrode connected to the voltage detector, and 47 is a second electrode also connected to the voltage detector. When the power supply voltage of the power source 45 is vH, the secondary voltage V'OUT output between the first electrode 46 and the second electrode 47 can be expressed by the following equation.

以上のように、各静電容量Ｃ１，Ｃ２，Ｃ３を適当に選
ぶことにより任意の二次電圧をとり出すことができるよ
うになっている。As described above, by appropriately selecting each capacitance C1, C2, C3, it is possible to extract any secondary voltage.

発明が解決しようとする課題 このような従来の構成では、二次電圧ＶＯＵＴを大きく
するためには、上記第２コンデンサ４２の静電容量を小
さくする必要があり、上記第２誘電体部３５を厚くしな
ければならず、分圧器の形状が太き（なり重量が増加す
るという課題があった。Problems to be Solved by the Invention In such a conventional configuration, in order to increase the secondary voltage VOUT, it is necessary to reduce the capacitance of the second capacitor 42. The problem was that the shape of the voltage divider was thick (and weight increased).

本発明はこのような課題を解決するもので小形高分圧の
分圧器を提供することを目的とするものである。The present invention solves these problems and aims to provide a small-sized high partial pressure voltage divider.

課題を解決するための手段 この課題を解決するために本発明は、電線導体部を軸と
して周囲を囲むようにして設けた第１誘電体部と、上記
第１誘電体部の外周に設けた第１電極と上記第１電極を
囲むようにして設けた第２誘電体部と、上記第２誘電体
部の外周に設けた第２電極を有し、上記第１電極と、上
記第２誘電体部と、上記第２電極で構成されるコンデン
サの静電容量を複数等分し、それぞれを直列接続したち
のである。Means for Solving the Problems In order to solve the problems, the present invention provides a first dielectric part provided so as to surround the electric wire conductor part as an axis, and a first dielectric part provided on the outer periphery of the first dielectric part. a second dielectric part provided to surround an electrode and the first electrode; and a second electrode provided on the outer periphery of the second dielectric part, the first electrode and the second dielectric part; The capacitance of the capacitor made up of the second electrode is divided into multiple equal parts, and each part is connected in series.

作用 この構成により、第２コンデンサの静電容量は同一形状
で等分直列接続しない場合の等分数分の１となり（１）
式より二次電圧ＶＯＵＴを大きく得ることができ小形高
分圧の分圧器が得られることとなる。Effect: With this configuration, the capacitance of the second capacitor is 1/1 of the equal fraction of the case where the capacitors have the same shape and are not connected in series (1)
From the formula, a large secondary voltage VOUT can be obtained, and a small high voltage divider can be obtained.

実施例 第１図は本発明の一実施例による分圧器の斜視図であり
、第２図はその断面図である。第１図および第２図にお
いて、１は電線導体部、２は上記電線導体部１を軸とし
て周囲を囲むようにして設けた第１誘電体部、３，３′
は上記第１誘電体部２の外周に設けた第１電極、４，４
′は上記第１電極３．３′を囲むようにして設けた第２
誘電体部、５，５′は上記第２誘電体部４，４′の外周
に設けた第２電極、６は上記第２電極５と上記第１電極
３′を電気的に接続する接続線、７は上記第１電極３と
電圧検出器の第１の入力端子とを接続するための第１端
子、８は上記第２電極５′と上：己電圧検出器の第２の
入力端子と接続するための第２端子である。上記第１電
極３と３′、上記第２誘電体４と４′、上記第２電極５
と５゛はいずれもそれぞれ長さは同じである。Embodiment FIG. 1 is a perspective view of a voltage divider according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof. In FIGS. 1 and 2, 1 is a wire conductor section, 2 is a first dielectric section provided surrounding the wire conductor section 1, and 3, 3'
are the first electrodes 4, 4 provided on the outer periphery of the first dielectric portion 2;
' is a second electrode provided surrounding the first electrode 3.3'.
Dielectric parts 5 and 5' are second electrodes provided on the outer periphery of the second dielectric parts 4 and 4', and 6 is a connection line that electrically connects the second electrode 5 and the first electrode 3'. , 7 is a first terminal for connecting the first electrode 3 and the first input terminal of the voltage detector, 8 is the second electrode 5' and the upper part is the second input terminal of the voltage detector. This is a second terminal for connection. The first electrodes 3 and 3', the second dielectrics 4 and 4', and the second electrode 5
and 5゛ have the same length.

以上のように構成された分圧器について以下その動作を
説明する。The operation of the voltage divider configured as described above will be explained below.

上記電線導体部１と、上記第２誘電体部２と、上記第１
電極３，３′で静電容量Ｃ１の第１コンデンサを構成す
る。The wire conductor portion 1, the second dielectric portion 2, and the first
The electrodes 3 and 3' constitute a first capacitor having a capacitance C1.

次に上記第１電極３と、上記第２誘電体部４と、上記第
２電極５で静電容量Ｃ２＋の第２コンテンサを構成する
。また、上記第１電極３′と、上記第２誘電体部４′と
、上記第２電極５′で静電容量Ｃ２２の第３コンデンサ
を形成する。Next, the first electrode 3, the second dielectric portion 4, and the second electrode 5 constitute a second capacitor having a capacitance C2+. Further, the first electrode 3', the second dielectric portion 4', and the second electrode 5' form a third capacitor having a capacitance C22.

ここで第１電極、第２誘電体、第２電極は等分されてい
るのでＣ２４＝Ｃ２２である。Here, since the first electrode, the second dielectric, and the second electrode are divided into equal parts, C24=C22.

さらに上記第２電極５，５′と、大地間の理容量Ｃ３に
より第４コンデンサが構成される。Further, a fourth capacitor is constituted by the physical capacitance C3 between the second electrodes 5, 5' and the ground.

上記第１電極、上記第２誘電体、上記第２電極を等分割
する前の上記第１電極３，３′と、第２誘電体４゜４′
と、第２電極５，５′で構成されるコンデンサの静電容
量をＣ２とすると、ＣＩ＝０２＝土であるから第２コン
デンサと第３コンデンサを直列接続することによって得
られる静電容量はＣ２／４である。The first electrode, the second dielectric, the first electrodes 3 and 3' before dividing the second electrode into equal parts, and the second dielectric 4°4'
If the capacitance of the capacitor composed of the second electrodes 5 and 5' is C2, then since CI=02=earth, the capacitance obtained by connecting the second capacitor and the third capacitor in series is It is C2/4.

よって（１）式は次のようになる。Therefore, equation (1) becomes as follows.

上記第１電極、上記第２電極、上記第２誘電体ｆ［を等
分しない場合には（１）式と同じであるから、それと比
較すると分割した場合の方が大きな二次重圧が得られる
。If the first electrode, the second electrode, and the second dielectric f[ are not divided into equal parts, the equation (1) is the same, so a larger secondary pressure can be obtained when they are divided. .

以上のように本実施例によれば、電線導体部を軸として
周囲を囲むようにして設けた第１誘電体部と、上記第１
誘電体部の外周に設けた第１電極と、上記第１電極を囲
むようにして設けた第２誘電体部と、上記第２誘電体部
の外周に設けた第２電極を有し、上記第１電極と上記第
２誘電体部と、上記第２電極で構成されるコンデンサの
静電容量を複数等分し、それぞれを直列接続することに
より小形高分電圧の分圧器を提供することができる。As described above, according to this embodiment, the first dielectric part is provided so as to surround the wire conductor part as an axis, and the first dielectric part is provided to surround the wire conductor part as an axis.
a first electrode provided on the outer periphery of the dielectric part; a second dielectric part provided surrounding the first electrode; and a second electrode provided on the outer periphery of the second dielectric part; By dividing the capacitance of the capacitor constituted by the electrode, the second dielectric portion, and the second electrode into a plurality of equal parts and connecting them in series, a small high-voltage voltage divider can be provided.

なお、この実施例においては２等分数の場合を示したが
さらに等分数を増しても同様であることはいうまでもな
い。In this embodiment, the case of two equal fractions is shown, but it goes without saying that the same effect can be obtained even if the number of equal fractions is further increased.

発明の効果 以上のように本発明によれば電線導体部を軸として周囲
を囲むようにして設けた第１誘電体部さ、上記第１誘電
体部の外周に設けた第１電極と、上記第１電極を囲むよ
うにして設けた第２誘電体部と、上記第２誘電体部の外
周に設けた第２電極を有し、上記第１電極と上記第２誘
電体部と、上記第２電極で構成されるコンデンサの静電
容量を複数等分し、それぞれを直列接続することにより
小形高分電圧の分圧器を提供することができるという効
果が得られる。Effects of the Invention As described above, according to the present invention, a first dielectric portion is provided surrounding the electric wire conductor portion as an axis, a first electrode is provided on the outer periphery of the first dielectric portion, and the first dielectric portion is provided around the wire conductor portion as an axis. It has a second dielectric part provided so as to surround the electrode, and a second electrode provided on the outer periphery of the second dielectric part, and is composed of the first electrode, the second dielectric part, and the second electrode. By dividing the capacitance of the capacitor into a plurality of equal parts and connecting them in series, it is possible to provide a compact high voltage divider.

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

第１図は本発明の一実施例による分圧器を示す斜視図、
第２図は本発明の一実施例による分圧器の断面図、第３
図は従来の分圧器の斜視図、第４図は分圧器の等価回路
図である。 １・・・・・・電線導体部、２・・・・・・第１誘電体
部、３゜３′・・・・・・第１電極、４，４′・・・・
・・第２誘電体部、５．５′・・・・・・第２電極、６
・・・・・・接続線、７・・・・・・第１端子、８・・
・・・・第２端子。 錫 図 第 図 第 図 第 図 Ｓ／FIG. 1 is a perspective view showing a voltage divider according to an embodiment of the present invention;
FIG. 2 is a sectional view of a voltage divider according to an embodiment of the present invention;
The figure is a perspective view of a conventional voltage divider, and FIG. 4 is an equivalent circuit diagram of the voltage divider. 1... Wire conductor part, 2... First dielectric part, 3°3'... First electrode, 4, 4'...
...Second dielectric part, 5.5'...Second electrode, 6
...Connection wire, 7...First terminal, 8...
...Second terminal. Tin diagram diagram diagram diagram diagram S/

Claims (1)

【特許請求の範囲】[Claims] 　電線導体部を軸として周囲を囲むようにして設けた第
１誘電体部と、上記第１誘電体部の外周に設けた第１電
極と、上記第１電極を囲むようにして設けた第２誘電体
部と、上記第２誘電体部の外周に設けた第２電極を有し
、上記第１電極と上記第２誘電体部と、上記第２電極で
構成されるコンデンサの静電容量を複数等分し、それぞ
れを直列接続したことを特徴とする分圧器。A first dielectric part provided so as to surround the wire conductor part as an axis, a first electrode provided on the outer periphery of the first dielectric part, and a second dielectric part provided so as to surround the first electrode. , having a second electrode provided on the outer periphery of the second dielectric portion, and dividing the capacitance of the capacitor constituted by the first electrode, the second dielectric portion, and the second electrode into multiple equal parts. , are each connected in series.