JPS629698Y2 - - Google Patents
Info
- Publication number
- JPS629698Y2 JPS629698Y2 JP1981050212U JP5021281U JPS629698Y2 JP S629698 Y2 JPS629698 Y2 JP S629698Y2 JP 1981050212 U JP1981050212 U JP 1981050212U JP 5021281 U JP5021281 U JP 5021281U JP S629698 Y2 JPS629698 Y2 JP S629698Y2
- Authority
- JP
- Japan
- Prior art keywords
- output
- load current
- winding
- voltage
- alarm device
- 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
Links
- 238000004804 winding Methods 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【考案の詳細な説明】
この考案は、電気機器に断線等の事故が生じた
とき警報を発する断線警報トランスに関するもの
であり、その特徴とするところは、電源線に抵抗
を介して接続した電圧巻線と警報装置に接続した
出力巻線とを設け、電気機器に正常な負荷電流が
流れているときは、負荷電流による起磁力と電圧
巻線に流れる電流による起磁力とがほぼ相殺して
出力巻線に出力があらわれないようにしておき、
断線や短絡等により負荷電流が大きく変化したと
き出力が出て警報装置を動作させるようにした点
である。[Detailed description of the invention] This invention relates to a disconnection alarm transformer that issues an alarm when an accident such as a disconnection occurs in electrical equipment. A winding and an output winding connected to the alarm device are installed, and when a normal load current is flowing through the electrical equipment, the magnetomotive force due to the load current and the magnetomotive force due to the current flowing through the voltage winding almost cancel each other out. Make sure that no output appears on the output winding,
The point is that when the load current changes significantly due to a disconnection or short circuit, an output is output and the alarm device is activated.
例えば恒温槽のヒーターのように、断線事故等
が発生した場合に直ちに発見して修理しなければ
ならない電気機器に於ては、少ない消費電力で常
に確実に動作する断線警報装置が必要とされる。 For example, in electrical equipment such as heaters in constant temperature ovens, which must be immediately discovered and repaired in the event of a disconnection, a disconnection alarm device that always operates reliably with low power consumption is required. .
この考案の目的は、どのような機器にも使用す
ることができ、構造が簡単で、消費電力が小さ
く、電源電圧および負荷電流の広い範囲にわたつ
て確実に動作する断線警報トランスを得ることで
ある。 The purpose of this invention is to obtain a disconnection alarm transformer that can be used in any equipment, has a simple structure, has low power consumption, and operates reliably over a wide range of power supply voltage and load current. be.
この考案の実施例について図面を参照しながら
説明する。 An embodiment of this invention will be described with reference to the drawings.
抵抗R0の電熱線１が、バイメタルなどを用い
たサーモスタツト２を介して電源に接続されてい
る。 A heating wire 1 having a resistance R 0 is connected to a power source via a thermostat 2 made of bimetal or the like.
電源線の一方を貫通させた環状鉄心３に、電圧
巻線４と出力巻線５とが巻回され、電圧巻線４は
抵抗Ｒを通して電源線に、また、出力巻線５は警
報装置６にそれぞれ接続されている。 A voltage winding 4 and an output winding 5 are wound around an annular iron core 3 through which one of the power wires is passed.The voltage winding 4 is connected to the power wire through a resistor R, and the output winding 5 is connected to an alarm device 6. are connected to each.
警報装置６は、例えば電磁リレーによりブザー
やランプを動作させる周知のものである。 The alarm device 6 is a well-known device that operates a buzzer or a lamp using, for example, an electromagnetic relay.
抵抗Ｒの値は、電圧巻線４の巻数をＮ（例えば
1000回）として
Ｒ＝NR0 ……(1)
となるように設定され、また、電圧巻線４の向き
は、負荷電流I0による起磁力I0×１と電圧巻線４
に流れる電流Ｉによる起磁力INとが逆向きにな
るように巻回されている。 The value of the resistance R is determined by the number of turns of the voltage winding 4 as N (for example,
1000 times), R = NR 0 ...(1), and the direction of the voltage winding 4 is determined by the magnetomotive force I 0 ×1 due to the load current I 0 and the voltage winding 4
The wire is wound so that the magnetomotive force IN caused by the current I flowing through the wire is in the opposite direction.
電源電圧をＶとすると、
Ｖ＝IR＝I0R0 ……(2)
であるから、これに式(1)を代入して、
IN＝I0 ……(3)
となる。即ち、I0とINとはその向きが逆になつて
いるから互いに打ち消し合い、環状鉄心３内には
磁束が発生せず出力巻線５には出力電圧が誘起さ
れない。 When the power supply voltage is V, V=IR=I 0 R 0 ...(2), so by substituting equation (1) into this, IN=I 0 ...(3). That is, since the directions of I 0 and IN are opposite, they cancel each other out, so that no magnetic flux is generated in the annular iron core 3 and no output voltage is induced in the output winding 5.
次に、事故が発生した場合の動作について説明
する。 Next, the operation when an accident occurs will be explained.
いま、電熱線１が断線し負荷電流がゼロになつ
たとすると、電圧巻線４に流れる電流による起磁
力INにより環状鉄心３内に磁束が発生するか
ら、出力巻線５に出力があらわれ警報装置６を動
作させる。 Now, if the heating wire 1 is disconnected and the load current becomes zero, magnetic flux is generated in the annular core 3 due to the magnetomotive force IN caused by the current flowing in the voltage winding 4, so an output appears in the output winding 5 and an alarm device is activated. Operate 6.
また、何等かの原因で電熱線１の途中が部分的
に短絡して負荷電流が2I0になつたとすると、2I0
−IN＝I0なる起磁力により環状鉄心３内に磁束が
発生し、出力巻線５に断線時と同様な出力があら
われ警報装置６を動作させる。 Also, if for some reason the heating wire 1 is partially short-circuited and the load current becomes 2I 0 , then 2I 0
A magnetic flux is generated in the annular core 3 due to the magnetomotive force -IN= I0 , and an output similar to that at the time of wire breakage appears in the output winding 5, causing the alarm device 6 to operate.
以上説明したように、この考案の断線警報トラ
ンスは、電源線の一方を貫通させた環状鉄心に、
電源線に抵抗を介して接続した電圧巻線と警報装
置に接続した出力巻線とを設け、正常な負荷電流
が流れているときは、負荷電流による起磁力と電
圧巻線に流れる電流による起磁力とがほぼ相殺さ
れるようにしておき、断線や短絡等により負荷電
流が大きく変化したとき出力巻線に出力があらわ
れ警報装置を動作させるようにしたことにより、
極めて簡単な構造で、故障することもなく確実に
動作するものである。 As explained above, the disconnection alarm transformer of this invention has a ring-shaped core through which one side of the power line is passed.
A voltage winding connected to the power supply line through a resistor and an output winding connected to the alarm device are installed, and when a normal load current is flowing, the magnetomotive force due to the load current and the electromotive force due to the current flowing through the voltage winding are By making it so that the magnetic force almost cancels out, and when the load current changes significantly due to wire breakage or short circuit, an output appears in the output winding and activates the alarm device.
It has an extremely simple structure and operates reliably without failure.
さらに、電圧巻線の巻数を大きくすれば消費電
力を小さくすることができ、また、負荷電流が異
なる機器に使用する場合には、抵抗Ｒの値を変え
るだけでよく、電源電圧および負荷電流の広い範
囲にわたつて使用することができるものである。 Furthermore, power consumption can be reduced by increasing the number of turns of the voltage winding, and when used in equipment with different load currents, it is only necessary to change the value of the resistor R, and the power supply voltage and load current can be adjusted. It can be used over a wide range of areas.
また、抵抗Ｒの値はそれほど正確である必要は
なく、I0とINとがほぼ打ち消し合つて出力電圧が
ある程度以下となつていればよいから、長期間の
使用により電熱線が酸化していわゆる「やせる」
ことにより負荷電流が変化した場合でも十分正確
に動作するものである。 In addition, the value of the resistor R does not need to be very accurate; it is sufficient that I 0 and IN almost cancel each other out and the output voltage is below a certain level. "Lose weight"
This allows for sufficiently accurate operation even when the load current changes.
なお、出力電圧は電源電圧に比例するが、飽和
鉄心を使用すれば電源電圧にかかわらず出力電圧
を一定におさえることができ、使用範囲をさらに
広げることができる。 Note that the output voltage is proportional to the power supply voltage, but if a saturated iron core is used, the output voltage can be held constant regardless of the power supply voltage, and the range of use can be further expanded.
また、出力電圧が小さすぎる場合は、電源線を
環状鉄心に通すだけでなく、数回巻回させるよう
にすれば、出力電圧は巻回した回数倍に上昇す
る。 Furthermore, if the output voltage is too low, by winding the power wire several times instead of just passing it through the annular core, the output voltage will increase by the number of times the wire is wound.
図は、この考案の実施例の配線図である。
１……電熱線、２……サーモスタツト、３……
環状鉄心、４……電圧巻線、５……出力巻線、６
……警報装置。
The figure is a wiring diagram of an embodiment of this invention. 1... Heating wire, 2... Thermostat, 3...
Annular iron core, 4... Voltage winding, 5... Output winding, 6
...Alarm device.
Claims (1)
に、電源線に抵抗を介して接続した電圧巻線と警
報装置に接続した出力巻線とを巻回し、環状鉄心
内に於て電気機器の負荷電流による起磁力と電圧
巻線に流れる電流による起磁力とがほぼ相殺され
るようにし、電気機器の負荷電流が大きく変化し
たとき警報装置を動作させることを特徴とする断
線警報トランス。 A voltage winding connected to the power line via a resistor and an output winding connected to an alarm device are wound around a ring core through which one side of the power line of the electric equipment is passed. A disconnection alarm transformer is characterized in that the magnetomotive force caused by the load current and the magnetomotive force caused by the current flowing through the voltage winding are almost canceled out, and an alarm device is activated when the load current of an electrical device changes significantly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981050212U JPS629698Y2 (en) | 1981-04-09 | 1981-04-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981050212U JPS629698Y2 (en) | 1981-04-09 | 1981-04-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57163728U JPS57163728U (en) | 1982-10-15 |
| JPS629698Y2 true JPS629698Y2 (en) | 1987-03-06 |
Family
ID=29846929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981050212U Expired JPS629698Y2 (en) | 1981-04-09 | 1981-04-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS629698Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS448183Y1 (en) * | 1968-03-07 | 1969-03-29 |
-
1981
- 1981-04-09 JP JP1981050212U patent/JPS629698Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS448183Y1 (en) * | 1968-03-07 | 1969-03-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57163728U (en) | 1982-10-15 |
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