JPH0222529B2 - - Google Patents
Info
- Publication number
- JPH0222529B2 JPH0222529B2 JP59135292A JP13529284A JPH0222529B2 JP H0222529 B2 JPH0222529 B2 JP H0222529B2 JP 59135292 A JP59135292 A JP 59135292A JP 13529284 A JP13529284 A JP 13529284A JP H0222529 B2 JPH0222529 B2 JP H0222529B2
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- winding
- main winding
- current
- current detection
- 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
- 238000004804 winding Methods 0.000 claims description 51
- 238000001514 detection method Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、一般に使われているリアクトルに
電流検出用巻線を設けることによつてリアクトル
本来の機能に加えてそのリアクトルを流れる電流
値を容易に検出することができるようにした電流
検出機能を備えたリアクトルに関するものであ
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a generally used reactor with a current detection winding, thereby providing the reactor with the ability to easily measure the current value flowing through the reactor. The present invention relates to a reactor equipped with a current detection function that enables current detection.
従来、リアクトルは基本的には第１図の形成を
とつている。すなわち、第１図において、COは
鉄心であり、所定の電流容量の導体を用いて所定
の自己インダクタンスを持つようリアクトル用主
巻線Ｗが鉄心COに巻回された形成となつている。
Ａ，Ｂはリアクトル用主巻線Ｗの端子である。
Conventionally, a reactor has basically been formed as shown in FIG. That is, in FIG. 1, CO is an iron core, and the reactor main winding W is wound around the iron core CO using a conductor with a predetermined current capacity so as to have a predetermined self-inductance.
A and B are terminals of the main winding W for the reactor.
使用に際しては第２図の回路図に示すように、
リアクトル用主巻線Ｗと負荷Ｚとを直列（必要に
応じ並列）にして、端子Ａ，B′間に電源を接続
し、低周波成分のみを負荷Ｚに供給する。 When using it, as shown in the circuit diagram in Figure 2,
The reactor main winding W and the load Z are connected in series (parallel if necessary), a power source is connected between terminals A and B', and only low frequency components are supplied to the load Z.
このような従来例において、リアクトル用主巻
線Ｗに流れている電流を検出しようとすると、第
３図のように電流計１を直列に挿入しなければな
らず、リアクトル用主巻線Ｗに流れる電流が大き
いときは電流計の内部抵抗で生ずる電力損が大き
くなり、低損失化を目指す回路においては一つの
問題点であつた。 In such a conventional example, when trying to detect the current flowing through the reactor main winding W, the ammeter 1 must be inserted in series as shown in Fig. 3, and the current flowing through the reactor main winding W must be inserted. When the flowing current is large, the power loss caused by the internal resistance of the ammeter becomes large, which is a problem in circuits aiming for low loss.
この発明は、上記従来の問題点を解決するため
に、リアクトル用主巻線を巻回した鉄心上に電流
検出用巻線を設け、この電流検出用巻線に発生す
る電圧値とリアクトル用主巻線に発生する電圧値
とを用いることによりリアクトル用主巻線を流れ
る電流値が容易に測定できるようにした電流検出
機能を備えたリアクトルを提供するものである。
以下、図面についてこの発明を説明する。
In order to solve the above-mentioned conventional problems, this invention provides a current detection winding on the iron core around which the reactor main winding is wound, and compares the voltage value generated in the current detection winding with the reactor main winding. The present invention provides a reactor equipped with a current detection function that allows the value of current flowing through the reactor main winding to be easily measured by using the voltage value generated in the winding.
The invention will now be explained with reference to the drawings.
第４図はこの発明の一実施例を示す回路図で、
鉄心は省略してある。
FIG. 4 is a circuit diagram showing an embodiment of this invention.
The iron core has been omitted.
この図で、Ｗは第１図と同じリアクトル用主巻
線で、Ｌはその自己インダクタンス、Wiは電流
検出用巻線で、Liはその自己インダクタンス、Ｍ
は前記両巻線ＷとWiの間の相互インダクタンス
で、Ｍ＝Ｌとなるようにする。同一方向に巻いた
２つの巻線Ｗ，Wiの巻き始めをＤ点で接続し第
４図の●印で示される極性のする。負荷電流ｉ
（ｔ）はリアクトル用主巻線Ｗのみに流し、リア
クトルとして動作させ、電流検出用巻線Wiには
電流は流さない。このようにしたとき２つの巻線
Ｗ，Wiの巻き終りの端子Ｂ，Ｃ間に現れる電圧
VM（ｔ）はリアクトル用主巻線Ｗを流れる負荷電
流ｉ（ｔ）に比例した大きさとなり、これをリア
クトル用主巻線Ｗの直流抵抗で除すればｉ（ｔ）
の値が得られる。 In this figure, W is the reactor main winding as in Figure 1, L is its self-inductance, W i is the current detection winding, L i is its self-inductance, M
is the mutual inductance between the windings W and W i , so that M=L. The winding ends of two windings W and W i wound in the same direction are connected at point D, and the polarity shown by the ● mark in FIG. 4 is established. load current i
(t) is passed only to the main winding W for the reactor to operate it as a reactor, and no current is passed to the current detection winding W i . When doing this, the voltage that appears between terminals B and C at the end of winding of two windings W and W i
V M (t) is proportional to the load current i(t) flowing through the reactor main winding W, and if this is divided by the DC resistance of the reactor main winding W, then i(t)
The value of is obtained.
リアクトル用主巻線Ｗがリアクトルとして動作
することは自明のことであるので、ここでは第４
図を用いて負荷電流ｉ（ｔ）が電圧VM（ｔ）から
測定される原理について説明する。リアクトルを
構成する場合、鉄心入り巻線では鉄心中に渦電流
が生ずることは周知のことで、この渦電流の効果
を考慮に入れた鉄心入り巻線の等価回路が第５図
で表されることはよく知られている。 It is obvious that the reactor main winding W operates as a reactor, so here, the fourth
The principle by which load current i(t) is measured from voltage V M (t) will be explained using the diagram. When configuring a reactor, it is well known that eddy currents are generated in the core of a winding with an iron core, and the equivalent circuit of a winding with an iron core that takes into account the effect of this eddy current is shown in Figure 5. This is well known.
第５図において、Ｌ，ｌおよびｒはそれぞれリ
アクトル用主巻線Ｗの自己インダクタンス、漏れ
インダクタンスおよび直流抵抗で、Ｍは両巻線Ｗ
とWiの間の相互インダクタンス、Zeは渦電流の
効果を表す等価回路である。今、端子AB間に現
れる電圧Ｖ（ｔ）、端子AC間に現れる電圧をVi
（ｔ）としたとき下記の各式が成立する。なお、
in（ｔ）はリアクトル用主巻線Ｗに流れる電流、
ie（ｔ）は渦電流、ｉ（ｔ）は全体の負荷電流であ
る。 In FIG. 5, L, l, and r are the self-inductance, leakage inductance, and DC resistance of the reactor main winding W, respectively, and M is the both winding W.
The mutual inductance between and W i , Z e is the equivalent circuit representing the effect of eddy currents. Now, the voltage V(t) appearing between terminals AB and the voltage appearing between terminals AC are V i
(t), the following equations hold true. In addition,
i n (t) is the current flowing through the reactor main winding W,
i e (t) is the eddy current and i(t) is the total load current.
Ｖ（ｔ）＝Ｌdin（ｔ）／dt＋ｌdi（ｔ）
／dt＋ｒ・ｉ（ｔ）……(1)
Vi（ｔ）＝Ｍdin（ｔ）／dt ……(2)
ｉ（ｔ）＝in（ｔ）＋ie（ｔ） ……(3)
VM（ｔ）＝Ｖ（ｔ）−Vi（ｔ） ……(4)
第(1)、(2)、(4)式よりVM（ｔ）は下記第(5)式とな
る。 V(t)=Ldi n (t)/dt+ldi(t)
/dt+r・i(t)...(1) V i (t)=Mdi n (t)/dt...(2) i(t)=i n (t)+i e (t)...(3) V M (t) = V (t) - Vi (t) ... (4) From equations (1), (2), and (4), V M (t) becomes equation (5) below.
VM（ｔ）＝（Ｌ−Ｍ）din（ｔ）／dt＋ｌd
i（ｔ）／dt＋ｒ・ｉ（ｔ）……(5)
第(5)式でＭ＝Ｌとすれば右辺の第１項は消え
る。また、漏れインダクタンスｌは非常に小さ
く、従つて第(5)式は近似的に第(6)式で表してよ
い。 V M (t)=(LM) di n (t)/dt+ld
i(t)/dt+r・i(t)...(5) If M=L in equation (5), the first term on the right side disappears. Furthermore, the leakage inductance l is very small, so equation (5) can be approximately expressed as equation (6).
VM（ｔ）≒ｒ・ｉ（ｔ） ……(6)
第(6)式によりｉ（ｔ）は下記第(7)式で示される
ようにVM（ｔ）をリアクトル用主巻線Ｗの直流抵
抗ｒで除することにより得られる。 V M (t)≒r・i(t) ...(6) From equation (6), i(t) is expressed as V M (t) for the reactor main winding as shown in equation (7) below. It is obtained by dividing by the DC resistance r of W.
ｉ（ｔ）＝VM（ｔ）／ｒ ……(7)
なお、上記実施例では、第(7)式の演算を実行す
る部分を示していないが、これは通常の割算でよ
いので各種の公知の手段を採用することができ
る。 i(t)=V M (t)/r...(7) Note that the above example does not show the part that executes the operation of equation (7), but this can be done by ordinary division. Various known means can be employed.
もと、リアクトル用主巻線Ｗと電流検出用巻線
WiとをＤ点で接続しているが、これは便宜上の
ことであつて、端子AB間の電圧Ｖ（ｔ）と、電
流検出用巻線Wiの両端の電圧Vi（ｔ）を別個に測
定し、この値から第(4)式のVM（ｔ）を求めてもよ
いことは云うまでもない。 Main winding W for reactor and current detection winding
W i is connected at point D, but this is for convenience, and the voltage V (t) between terminals AB and the voltage V i (t) across the current detection winding W i are connected at point D. It goes without saying that V M (t) in equation (4) may be obtained by measuring separately and using this value.
以上詳細に説明したように、この発明は鉄心上
にリアクトル用主巻線を備えたリアクトルにおい
て、同一の鉄心上に電流検出用巻線を設け、この
電流検出用巻線とリアクトル用主巻線の間の相互
インダクタンスの値と、リアクトル用主巻線の自
己インダクタンスの値とを等しく形成したので、
両巻線の両端の電圧値からリアクトル用主巻線に
流れる電流を容易に測定できる利点があり、広い
利用が期待されるものである。
As explained in detail above, the present invention provides a reactor having a reactor main winding on an iron core, a current detection winding is provided on the same iron core, and the current detection winding and the reactor main winding are connected to each other. Since the value of mutual inductance between and the value of self-inductance of the main winding for the reactor are equal,
It has the advantage of being able to easily measure the current flowing through the reactor main winding from the voltage values at both ends of both windings, and is expected to be widely used.
第１図〜第３図は従来のリアクトルを示すもの
で、第１図は構成略図、第２図は使用態様の一例
を示す回路図、第３図は同じく電流測定のための
回路図、第４図はこの発明の一実施例を示す回路
図、第５図は第４図の実施例の動作説明のための
等価回路図である。
図中、COは鉄心、Ｗはリアクトル用主巻線、
Wiは電流検出用巻線、Ｌはリアクトル用主巻線
の自己インダクタンス、Liは電流検出用巻線の自
己インダクタンス、Ａ，Ｂ，Ｃは端子、Ｄはリア
クトル用主巻線と電流検出用巻線とを接続した点
である。
Figures 1 to 3 show conventional reactors. Figure 1 is a schematic diagram of the configuration, Figure 2 is a circuit diagram showing an example of how it is used, Figure 3 is a circuit diagram for current measurement, and Figure 3 is a circuit diagram for current measurement. FIG. 4 is a circuit diagram showing one embodiment of the present invention, and FIG. 5 is an equivalent circuit diagram for explaining the operation of the embodiment of FIG. In the figure, CO is the iron core, W is the reactor main winding,
W i is the current detection winding, L is the self-inductance of the reactor main winding, L i is the self-inductance of the current detection winding, A, B, and C are terminals, and D is the reactor main winding and current detection. This is the point where the winding is connected.
Claims (1)
クトルにおいて、前記リアクトル用主巻線に流れ
る電流を検出するための電流検出用巻線を前記鉄
心上に設けるとともに、前記リアクトル用主巻線
の自己インダクタンスの値と前記リアクトル用主
巻線と前記電流検出用巻線との間の相互インダク
タンスの値とを等しく形成したことを特徴とする
電流検出機能を備えたリアクトル。1. In a reactor in which a reactor main winding is wound on an iron core, a current detection winding for detecting the current flowing in the reactor main winding is provided on the iron core, and a A reactor with a current detection function, characterized in that a self-inductance value and a mutual inductance value between the reactor main winding and the current detection winding are set to be equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59135292A JPS6115311A (en) | 1984-07-02 | 1984-07-02 | Reactor provided with function of current detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59135292A JPS6115311A (en) | 1984-07-02 | 1984-07-02 | Reactor provided with function of current detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6115311A JPS6115311A (en) | 1986-01-23 |
| JPH0222529B2 true JPH0222529B2 (en) | 1990-05-18 |
Family
ID=15148285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59135292A Granted JPS6115311A (en) | 1984-07-02 | 1984-07-02 | Reactor provided with function of current detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6115311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0461686U (en) * | 1990-09-28 | 1992-05-27 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5267802B2 (en) * | 2009-03-16 | 2013-08-21 | 住友電気工業株式会社 | Reactor assembly |
| US8933774B2 (en) | 2010-06-22 | 2015-01-13 | Sumitomo Electric Industries, Ltd. | Reactor |
-
1984
- 1984-07-02 JP JP59135292A patent/JPS6115311A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0461686U (en) * | 1990-09-28 | 1992-05-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6115311A (en) | 1986-01-23 |
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