JPS5979162A - Current detector - Google Patents
Current detectorInfo
- Publication number
- JPS5979162A JPS5979162A JP19149982A JP19149982A JPS5979162A JP S5979162 A JPS5979162 A JP S5979162A JP 19149982 A JP19149982 A JP 19149982A JP 19149982 A JP19149982 A JP 19149982A JP S5979162 A JPS5979162 A JP S5979162A
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- pulse
- voltage
- current
- switching
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】 この発明は、電流検出器に関する。[Detailed description of the invention] The present invention relates to a current detector.
この種の暖流検出器としては、従来、シャント抵抗や直
流変成器が使用されているが、前者は被測定電流が流れ
る主回路側との絶縁ができない為、高１圧回路には用い
ることができず、後者は応答性、検出精度が良くない上
、高価になるという欠点があった。Traditionally, shunt resistors and DC transformers have been used in this type of warm current detector, but the former cannot be used in high-voltage circuits because it cannot be isolated from the main circuit through which the current to be measured flows. However, the latter has the drawbacks of poor responsiveness and detection accuracy, as well as being expensive.
この発明は、上記した従来の欠点を除去する為になされ
たもので、同期してテヨツノ（動作をするスイッチング
素子を１次側及び２次側に具える）くルス変土器がシャ
ント抵抗とフィルタの間に挿入され、父上記１次１ｔｌ
！ｌのスイッチング素子と制御ノくルス列を出力する発
振器とが電気的に絶縁される構成とすることによって、
高電圧回路に使用することができ、しかも梢舵、応答性
にすぐれ、安価に製作することができる電流検出器を提
供することを目的とする。This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology. inserted between the father and the primary 1tl
! By configuring the switching element of 1 and the oscillator that outputs the control pulse train to be electrically isolated,
It is an object of the present invention to provide a current detector that can be used in a high voltage circuit, has excellent rudder control, responsiveness, and can be manufactured at low cost.
以下、この発明の一実・庇１ｆｌｌを図について説明す
る。Hereinafter, one part of this invention, the eave 1flll, will be explained with reference to the drawings.
第１図にお・いて、１は被測定電流■が流れる導体、２
はシャント抵抗、３及び４ ：を上第１のフィルタ５を
構成する抵抗とコンデンサ、６及びＴはスイッチング素
子、８はパルス変圧器である。スイッチング素子６はパ
ルス変圧器８の１次巻線ｒｚ と−Ｆ記フィルタ５との
間に挿入され、スイッチング素子γはパルス変圧器８の
２次巻線ｎ２と直列に接続きれている。９はパルス発掘
器であっ℃、第２図（ｂｌに示す如き制御パルスＰを送
出し、該制御ハルスＰはパルス変圧器１ｏを介してスイ
ッチング素子６のゲート端子に人力されると共に抵抗１
１を介してスイッチング素子γのゲート端子に供給され
る。１２は増巾器であって、スイッチング素子ｒの出力
が抵抗１３とコンデンサ１４からなる第２のフィルタ１
５を介して導かれる。１６及び１７は帰鐙抵抗である。In Figure 1, 1 is the conductor through which the current to be measured flows, 2
are shunt resistors; 3 and 4 are resistors and capacitors constituting the first filter 5; 6 and T are switching elements; and 8 is a pulse transformer. The switching element 6 is inserted between the primary winding rz of the pulse transformer 8 and the -F filter 5, and the switching element γ is connected in series with the secondary winding n2 of the pulse transformer 8. Reference numeral 9 denotes a pulse excavator which sends out a control pulse P as shown in FIG.
1 to the gate terminal of the switching element γ. 12 is an amplifier in which the output of the switching element r is connected to a second filter 1 consisting of a resistor 13 and a capacitor 14;
5. 16 and 17 are return stirrup resistances.
１８は出力端子である。18 is an output terminal.
次に、この直流電流検出器の動作を第２図を参照して説
明する。Next, the operation of this DC current detector will be explained with reference to FIG.
導体１に被測定電流Ｉが流れると該電流■の大きさに比
例した電圧Ｖがシャント抵抗２を通して取出され、第１
のフィルタ５を介してスイッチング素子６に加えられる
。スイッチング素子６には所定時間巾ｔ１の制御パルス
Ｐが入力され一定時間々ｎ ｔ ｔでスイッチング動作
を行っている為、第２図（ｅ）に示す如き断続波の曳圧
がパルス変圧器８の２次側に現われる。スイッチング素
子Ｔはスイッチング素子６と同１υ】して開閉する為パ
ルス変圧器８０２次側に現われた′電圧はそのままスイ
ッチング素子Ｔを通過しコンデンサ１４を充電する。When the current I to be measured flows through the conductor 1, a voltage V proportional to the magnitude of the current I is taken out through the shunt resistor 2, and
The signal is applied to the switching element 6 via the filter 5 . Since the control pulse P with a predetermined time width t1 is input to the switching element 6 and the switching operation is performed every certain time ntt, the pulling pressure of the intermittent wave as shown in FIG. 2(e) is applied to the pulse transformer 8. appears on the secondary side of Since the switching element T opens and closes in the same way as the switching element 6, the voltage appearing on the secondary side of the pulse transformer 80 passes through the switching element T as it is and charges the capacitor 14.
ｈ記亀田は断続波であるが、その立下り時にはスイッチ
ング素子Ｉがオフ状幅にある為、コンデンサ１４は放電
せず続く立上り時点まで充′、框々圧を保持するので、
出力端子１８からは第２図（ｄ）に示す如く、被測定電
流Ｉに相似する波形の検出信号が取出される。Ｏの検出
信号のイ肯度は、両スイッチング素子６．Ｔのスイッチ
ング動作を高速にすることによって高めることができろ
。Kameda in h note is an intermittent wave, but at the time of its falling, the switching element I is in the off-state width, so the capacitor 14 does not discharge and maintains the charged and constant pressure until the following rising point.
A detection signal having a waveform similar to the current I to be measured is taken out from the output terminal 18, as shown in FIG. 2(d). The positive degree of the detection signal of O is determined by both switching elements 6. This can be improved by increasing the switching speed of T.
以上の如く、この発明によれば、１次１則と２次側に夫
々チョンバ動作ゼするスイッチング素子を具えるパルス
変圧器の上記１次側にシャント抵抗のアナログ出力を入
力してパルス化し、パルス化された信号をフィルタを通
しアナログ化して出力せしめる構成としたことにより、
４莢出１１１ｔ１と出力１１１１がパルス変圧器によっ
て心気的に絶縁されるので、高Ｔ［出回路用として使用
することができて、しかも応答性や積度に丁ぐれた電流
検出器を得ることができる。As described above, according to the present invention, the analog output of the shunt resistor is inputted to the primary side of the pulse transformer, which is provided with switching elements that perform a switching operation on the primary and secondary sides, respectively, and pulsed. By using a configuration that passes the pulsed signal through a filter and outputs it as an analog signal,
4. Since the output 111t1 and the output 1111 are insulated by the pulse transformer, a current detector that can be used as a high T [output circuit] and has excellent response and integration can be obtained. be able to.
第１図はこの発明による電流検出器の実施例の回路購成
図、ポ２図は上記実施例におり゛る各部動作波形のタイ
ムチャートである。
図において、
２・・・・・・ツヤ／ト抵抗器
６、γ・・・・・・スイッチング素子
８．１０・・・・・・パルス変圧器
９・・・・・・発掘器
１５・・・・・・フィルタ。
柚、図中、回−杓号＝ ＆Ｊ、１ｉｊ４−又Ｕ相当部分
を３３６FIG. 1 is a circuit diagram of an embodiment of a current detector according to the present invention, and FIG. 2 is a time chart of operation waveforms of various parts in the above embodiment. In the figure, 2... gloss resistor 6, γ... switching element 8, 10... pulse transformer 9... excavator 15... ····filter. Yuzu, in the figure, the number of times is &J, 1ij4-and the part corresponding to U is 336
Claims (1)
シャント抵抗の出力を受ける第１のスイッチング素子、
該第１のスイッチング素子を１次側に具える第１のパル
ス変圧器、該パルス変圧器の２次側に挿入され上記第１
のスイッチング素子と同期して開閉する第２のスイッチ
ング素子、該＠２のスイッチング素子の出力を平滑する
フィルタを具え、上記第１及び第２のスイッチング素子
の制御パルス列が第２のパルス変圧器を介してト記第１
のスイッチング素子に供給されることｌｔ特敵とする電
流検出器。Break l111 constant circuit! , f1, a 7-yant resistor, a first switching element receiving the output of the shunt resistor,
a first pulse transformer having the first switching element on its primary side;
a second switching element that opens and closes in synchronization with the switching element @2; a filter that smoothes the output of the switching element @2; Through G, 1st
The current detector is designed to be supplied to the switching elements of the current detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19149982A JPS5979162A (en) | 1982-10-28 | 1982-10-28 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19149982A JPS5979162A (en) | 1982-10-28 | 1982-10-28 | Current detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5979162A true JPS5979162A (en) | 1984-05-08 |
Family
ID=16275662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19149982A Pending JPS5979162A (en) | 1982-10-28 | 1982-10-28 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5979162A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184468U (en) * | 1986-05-13 | 1987-11-24 | ||
| JPH07110347A (en) * | 1993-10-08 | 1995-04-25 | Nec Corp | Direct current measuring device |
| JP2004501687A (en) * | 2000-06-28 | 2004-01-22 | キャラウェイ・ゴルフ・カンパニ | Four sides sole plate of golf club head |
| CN1321325C (en) * | 2002-06-19 | 2007-06-13 | 吴伟 | High tension current detecting method and device |
-
1982
- 1982-10-28 JP JP19149982A patent/JPS5979162A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184468U (en) * | 1986-05-13 | 1987-11-24 | ||
| JPH07110347A (en) * | 1993-10-08 | 1995-04-25 | Nec Corp | Direct current measuring device |
| JP2004501687A (en) * | 2000-06-28 | 2004-01-22 | キャラウェイ・ゴルフ・カンパニ | Four sides sole plate of golf club head |
| CN1321325C (en) * | 2002-06-19 | 2007-06-13 | 吴伟 | High tension current detecting method and device |
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