JP3230876B2 - Electricity meter - Google Patents
Electricity meterInfo
- Publication number
- JP3230876B2 JP3230876B2 JP01826993A JP1826993A JP3230876B2 JP 3230876 B2 JP3230876 B2 JP 3230876B2 JP 01826993 A JP01826993 A JP 01826993A JP 1826993 A JP1826993 A JP 1826993A JP 3230876 B2 JP3230876 B2 JP 3230876B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- current
- voltage
- conversion element
- signal
- 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 - Fee Related
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、例えばホール素子を利
用した電流検出器や電子式電力量計に適用できる電気量
測定器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric meter which can be applied to, for example, a current detector using a Hall element or an electronic wattmeter.
【０００２】[0002]
【従来の技術】従来、この種の電気量測定器は、例えば
図３に示すようになっている。2. Description of the Related Art Conventionally, this kind of electric quantity measuring instrument is, for example, as shown in FIG.
【０００３】同図において、接続端子１から供給される
被測定電流は導線２を通じている。電流−磁気変換素子
３は、例えばリング状を有する磁路の一部に空隙部を有
する磁性体コアからなっており、導線２が巻回され（図
３においては、導線２が１回だけ貫通するようになって
いる）、この導線２に通じる電流に比例した磁界が前述
の空隙部に発生する。また、電流−磁気変換素子３はケ
ース４に挿入され、ねじ５により筺体９に固定されてい
る。In FIG. 1, a current to be measured supplied from a connection terminal 1 passes through a conductor 2. The current-magnetic conversion element 3 is formed of, for example, a magnetic core having a gap in a part of a magnetic path having a ring shape, and is wound around the conductor 2 (in FIG. A magnetic field proportional to the current flowing through the conductor 2 is generated in the gap. The current-magnetic conversion element 3 is inserted into the case 4 and is fixed to the housing 9 with the screw 5.
【０００４】一方、プリント基板６は図示しない電子回
路が備えられ、例えば感磁素子であるホール素子や磁気
抵抗素子のような磁気−電圧変換素子７が装着される。
このプリント基板６もポスト８により筐体９に固定され
ている。On the other hand, the printed circuit board 6 is provided with an electronic circuit (not shown), on which a magnetic-to-voltage conversion element 7 such as a Hall element or a magnetoresistive element, for example, is mounted.
The printed circuit board 6 is also fixed to the housing 9 by the post 8.
【０００５】プリント基板６に装着された磁気−電圧変
換素子７は、電流−磁気変換素子３の空隙部に挿入さ
れ、この空隙部に生じている磁界の強さに比例した電圧
を出力する。この磁気−電圧変換素子７の出力電圧に基
づいて、プリント基板６に備えられた図示しない電子回
路が演算処理を行う。[0005] The magnetic-to-voltage conversion element 7 mounted on the printed circuit board 6 is inserted into the gap of the current-to-magnetic conversion element 3 and outputs a voltage proportional to the strength of the magnetic field generated in this gap. An electronic circuit (not shown) provided on the printed circuit board 6 performs arithmetic processing based on the output voltage of the magnetic-voltage conversion element 7.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の電気量測定器では、電流−磁気変換素子３が
挿入されたケース４、および磁気−電圧変換素子７が装
着されたプリント基板６がそれぞれ別々に筐体９に固定
されるので、電流−磁気変換素子３と磁気−電圧変換素
子７の位置決めが難しい。この位置決めが不適切である
と、磁気−電圧変換素子７の出力電圧の精度が劣ってし
まい、信頼性に欠けてしまう。さらに、ケース４の分だ
け電流−磁気変換素子３の空隙部が実質的に広がること
になるので、この空隙部に発生する磁界が弱まって結果
的に磁気−電圧変換素子７から十分な出力電圧を得るこ
とができず、ますます精度が劣ってしまう。また、ケー
ス４をねじ５により筐体９に固定していたので、組立作
業性が悪いうえ、ケース４・ネジ５による高コスト化を
招くことにもなる。本発明の目的は、高精度で組立作業
性を改善できる電気量測定器を提供することにある。However, in such a conventional electric quantity measuring instrument, the case 4 in which the current-to-magnetic conversion element 3 is inserted and the printed board 6 in which the magnetic-to-voltage conversion element 7 is mounted are used. Since they are separately fixed to the housing 9, it is difficult to position the current-magnetic conversion element 3 and the magnetic-voltage conversion element 7. If this positioning is inappropriate, the accuracy of the output voltage of the magnetic-to-voltage conversion element 7 will be inferior and reliability will be lacking. Further, since the gap of the current-magnetic conversion element 3 is substantially widened by the amount of the case 4, the magnetic field generated in this gap is weakened, and as a result, a sufficient output voltage from the magnetic-voltage conversion element 7 is obtained. Cannot be obtained, and the accuracy is further reduced. In addition, since the case 4 is fixed to the housing 9 by the screws 5, the assembling workability is poor, and the cost increases due to the case 4 and the screws 5. SUMMARY OF THE INVENTION An object of the present invention is to provide an electric quantity measuring instrument which can improve assembly workability with high accuracy.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、供給線からの電気信号に比例した磁界を発
生する電流−磁気変換手段と、この電流−磁気変換手段
からの磁界の強さに比例した電圧信号を出力する磁気−
電圧変換手段と、電子回路が備えられ且つ前記磁気−電
圧変換手段が装着された基板とを有し、この基板の一部
を外方に延出させてつめ状の固定部を一体に形成させて
前記電流−磁気変換手段を固定したことを要旨とする。In order to achieve the above object, the present invention provides a magnetic field which is proportional to an electric signal from a supply line.
The generated current-magnetic conversion means, and the magnetic-current output means outputs a voltage signal proportional to the strength of the magnetic field from the current-magnetic conversion means.
And voltage converting means, and the magnetic provided with an electronic circuit - and a substrate voltage converting means is mounted, a portion of the substrate
Is extended outward to integrally form a claw-shaped fixing portion to fix the current-magnetic conversion means.
【０００８】[0008]
【作用】このような構成において、電流−磁気変換手段
は磁気−電圧変換手段が装着された基板の固定部に固定
されるので、電流−磁気変換手段と磁気−電圧変換手段
との位置決めが容易になる。In such a configuration, the current-magnetic conversion means is fixed to the fixed portion of the substrate on which the magnetic-voltage conversion means is mounted, so that the positioning of the current-magnetic conversion means and the magnetic-voltage conversion means is easy. become.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照して説明
する。なお、従来と同様のものについては、同一番号を
付して説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and description thereof is omitted.
【００１０】図１は本発明の一実施例を示す電気量測定
器の構成図であり、図２は図１のプリント基板６の要部
拡大図である。これらの図において、従来の電気量測定
器を示す図３と異なるところは、電流−磁気変換素子３
の固定手段にある。FIG. 1 is a configuration diagram of an electric quantity measuring device showing one embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of a printed circuit board 6 of FIG. In these figures, the difference from FIG.
In the fixing means.
【００１１】すなわち、本実施例においては、電流−磁
気変換素子３をプリント基板６の固定部１０に固定する
ようにし、従来のケース４、ねじ５を不要とした。この
固定部１０は、例えばつめ状にプリント基板６に形成さ
れるとともに電流−磁気変換素子３の大きさや形状に合
わせており、電流−磁気変換素子３が簡単に（例えば、
ワンタッチで可）係合できるようになっている。また、
電流−磁気変換素子３が固定部１０に係合したことによ
り固定された際に、プリント基板６に装着された磁気−
電圧変換素子７が電流−磁気変換素子３の空隙部に適確
に配置されるようになっており、電流−磁気変換素子３
からの被測定電流に比例した磁界を十分に得られるよう
になっている。That is, in the present embodiment, the current-magnetic conversion element 3 is fixed to the fixing portion 10 of the printed circuit board 6, and the conventional case 4 and screw 5 are unnecessary. The fixing part 10 is formed on the printed circuit board 6 in, for example, a claw shape and is adapted to the size and shape of the current-magnetic conversion element 3.
It can be engaged with one touch). Also,
When the current-magnetic conversion element 3 is fixed by being engaged with the fixing portion 10, the magnetic element
The voltage conversion element 7 is arranged accurately in the gap of the current-magnetic conversion element 3.
Thus, a magnetic field proportional to the current to be measured can be obtained sufficiently.
【００１２】本実施例によれば、電流−磁気変換素子３
も磁気−電圧変換素子７もプリント基板６に装着または
固定させているので両者の位置決めが容易になる。従っ
て、電流−磁気変換素子３からの磁界を磁気−電圧変換
素子７へ十分に供給することができ、精度を向上させる
ことができる。さらに従来のケース４を除去したので、
電流−磁気変換素子３の空隙部の実質的な広がりを防
げ、より一層精度を向上できるだけでなく、ねじ５を除
去したことと併せて組立作業の容易化、低コスト化も可
能になる。また、電流−磁気変換素子３をプリント基板
６の固定部１０に固定する際に、プリント基板６に装着
された磁気−電圧変換素子７と略直交するように、つま
り電流−磁気変換素子３の空隙部に対して磁気−電圧変
換素子７を略直交して配置されるように電流−磁気変換
素子３を固定すれば、高精度化はますます顕著になる。According to this embodiment, the current-magnetic conversion element 3
Also, since the magnetic-to-voltage conversion element 7 is mounted or fixed on the printed circuit board 6, the positioning of the two can be facilitated. Therefore, the magnetic field from the current-magnetic conversion element 3 can be sufficiently supplied to the magnetic-voltage conversion element 7, and the accuracy can be improved. Furthermore, since the conventional case 4 was removed,
Not only can the gap between the current-magnetic conversion elements 3 be substantially prevented from being widened and the accuracy can be further improved, but also the elimination of the screw 5 simplifies the assembly operation and reduces the cost. When the current-magnetic conversion element 3 is fixed to the fixing portion 10 of the printed circuit board 6, the current-magnetic conversion element 3 is substantially orthogonal to the magnetic-voltage conversion element 7 mounted on the printed circuit board 6, that is, the current-magnetic conversion element 3 If the current-magnetic conversion element 3 is fixed so that the magnetic-voltage conversion element 7 is arranged substantially orthogonally to the gap, the improvement in accuracy becomes more remarkable.
【００１３】なお、本実施例では電流検出器を例にとり
説明してきたが、電子式電力量計の乗算手段としても適
用できる。すなわち、図示しない供給線からの電圧信号
を例えば抵抗を介して電流信号（電流−磁気変換素子３
へ供給される電流信号とは異なる）に変換し、この電流
信号を磁気−電圧変換素子７へ供給すれば、磁気−電圧
変換素子７はこの電流信号と電流−磁気変換素子３が変
換した磁界の強さとの積に比例した電圧信号を出力する
ことになる。この電圧信号は、換言すれば、供給線から
の電圧信号と電流信号との積に比例した信号、つまり電
力に比例した信号である。このように、本発明は電子式
電力量計としても適用でき、電流検出器の場合と同様の
効果が得られる。Although the present embodiment has been described using a current detector as an example, the present invention can also be applied to a multiplying means of an electronic watt-hour meter. That is, a voltage signal from a supply line (not shown) is converted into a current signal (current-magnetic conversion element 3) via a resistor, for example.
If the current signal is supplied to the magnetic-to-voltage conversion element 7, the magnetic-to-voltage conversion element 7 converts the current signal to the magnetic field converted by the current-to-magnetic conversion element 3. And outputs a voltage signal proportional to the product of the intensity and the intensity. This voltage signal is, in other words, a signal proportional to the product of the voltage signal and the current signal from the supply line, that is, a signal proportional to the power. As described above, the present invention can also be applied to an electronic watt-hour meter, and the same effects as in the case of the current detector can be obtained.
【００１４】[0014]
【発明の効果】以上のように本発明によれば、供給線か
らの電気信号に比例した磁界を発生する電流−磁気変換
手段と、電流−磁気変換手段からの磁界の強さに比例し
た電圧信号を出力する磁気−電圧変換手段と、電子回路
が備えられ且つ磁気−電圧変換手段が装着された基板と
を有し、基板の一部を外方に延出させてつめ状の固定部
を一体に形成させて電流−磁気変換手段を固定するよう
にしたので、高精度で組立作業性を改善できる電気量測
定器を得ることができる。As described above, according to the present invention, the current-magnetic conversion means for generating a magnetic field proportional to the electric signal from the supply line, and the voltage proportional to the strength of the magnetic field from the current-magnetic conversion means and voltage converting means, and provided with an electronic circuit magnetic - - magnetic for outputting a signal and a substrate to which a voltage converting means is mounted, the by extending a portion of the substrate outward claw-shaped fixing portion Since the current-magnetic conversion means is fixed by being integrally formed, it is possible to obtain an electric quantity measuring instrument which can improve the assembly workability with high accuracy.
【図１】 本発明の電気量測定器の一実施例を示す構成
図。FIG. 1 is a configuration diagram showing an embodiment of an electric quantity meter according to the present invention.
【図２】 ［図１］の要部拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図３】 従来の電気量測定器の構成図。FIG. 3 is a configuration diagram of a conventional electricity meter.
３……電流−磁気変換素子、６……プリント基板、７…
…磁気−電圧変換素子 １０……固定部3 ... current-magnetic conversion element, 6 ... printed circuit board, 7 ...
... Magnetic-voltage conversion element 10 ... Fixed part
───────────────────────────────────────────────────── フロントページの続き 審査官 尾崎 淳史 (56)参考文献 実開 平１−132978（ＪＰ，Ｕ) 実開 昭61−17674（ＪＰ，Ｕ) 実開 平４−81070（ＪＰ，Ｕ) 実開 平５−6373（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01R 15/20 G01R 11/04 G01R 21/08 ──────────────────────────────────────────────────続 き Continuing from the front page Examiner Atsushi Ozaki (56) References JP-A 1-132978 (JP, U) JP-A 61-17674 (JP, U) JP-A 4-81070 (JP, U) Kaihei 5-6373 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G01R 15/20 G01R 11/04 G01R 21/08
Claims (2)
発生する電流−磁気変換手段と、この電流−磁気変換手
段からの磁界の強さに比例した電圧信号を出力する磁気
−電圧変換手段と、電子回路が備えられ且つ前記磁気−
電圧変換手段が装着された基板とを有し、この基板の一
部を外方に延出させてつめ状の固定部を一体に形成させ
て前記電流−磁気変換手段を固定したことを特徴とする
電気量測定器。1. A magnetic field proportional to the electric signal from the supply line
Current generated - and the magnetic conversion means, this current - magnetic and outputs a voltage signal proportional to the intensity of the magnetic field from the magnetic transducer means - voltage conversion means, and the magnetic provided with an electronic circuit -
And a substrate to which a voltage converting means is mounted, the substrate-
An electric quantity measuring device characterized in that the current-magnetic conversion means is fixed by extending the portion outward to integrally form a claw-shaped fixing portion.
の電気信号に比例した信号が与えられるとともに、この
信号と前記電流−磁気変換手段からの磁界の強さとの積
に比例した電圧信号を出力するようにしたことを特徴と
する請求項１記載の電気量測定器。2. The power supply line according to claim 2, wherein
Together with a signal proportional to the electrical signal is applied, this signal and the current - claim 1 Symbol mounting is characterized in that so as to output a voltage signal proportional to the product of the intensity of the magnetic field from the magnetic conversion means Electricity meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01826993A JP3230876B2 (en) | 1993-02-05 | 1993-02-05 | Electricity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01826993A JP3230876B2 (en) | 1993-02-05 | 1993-02-05 | Electricity meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06230038A JPH06230038A (en) | 1994-08-19 |
| JP3230876B2 true JP3230876B2 (en) | 2001-11-19 |
Family
ID=11966941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01826993A Expired - Fee Related JP3230876B2 (en) | 1993-02-05 | 1993-02-05 | Electricity meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3230876B2 (en) |
-
1993
- 1993-02-05 JP JP01826993A patent/JP3230876B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06230038A (en) | 1994-08-19 |
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