JPS60120417A - Overcurrent detecting protective circuit - Google Patents
Overcurrent detecting protective circuitInfo
- Publication number
- JPS60120417A JPS60120417A JP22693383A JP22693383A JPS60120417A JP S60120417 A JPS60120417 A JP S60120417A JP 22693383 A JP22693383 A JP 22693383A JP 22693383 A JP22693383 A JP 22693383A JP S60120417 A JPS60120417 A JP S60120417A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- switch
- circuit
- transistor
- power supply
- 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
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、電話交換機に使用される電子化加入者回路の
過電流検出保護回路の構成に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to the configuration of an overcurrent detection and protection circuit for an electronic subscriber circuit used in a telephone exchange.
（背景技術）
従来の電子化加入者回路における過電流保護回路は第１
図に示す様に、給電用トランジスタ６゜１３の温度を温
度検出素子ｌで検出し、比較器２で基準値と比較し、駆
動回路１１を駆動することにより、給電用トランジスタ
６．１３の機能を停止させる回路構成をとっている。第
２図は第１図の回路に制御用トランジスタ７．１２ を
付加し、給電用トランジスタ６．１３に流れる電流を制
限する回路を示す図である。従って、第１図、第２図共
に回路対応に温度検出素子と比較器が必要なため加入者
回路を構成する場合、比較器によって実装容積が大とな
り価格上昇の一因にもなるという欠点を持っていた。(Background technology) The overcurrent protection circuit in the conventional electronic subscriber circuit is
As shown in the figure, the temperature of the power supply transistor 6.13 is detected by the temperature detection element 1, compared with a reference value by the comparator 2, and the drive circuit 11 is driven to determine the function of the power supply transistor 6.13. The circuit is configured to stop the FIG. 2 is a diagram showing a circuit in which a control transistor 7.12 is added to the circuit of FIG. 1 to limit the current flowing through the power supply transistor 6.13. Therefore, since a temperature detection element and a comparator are required for the circuits in both Figures 1 and 2, when configuring a subscriber circuit, the comparator increases the mounting volume, which is a cause of price increase. had.
（発明の課題）
本発明の目的はこれらの欠点を除去するため、比較器が
不要となる保護回路構成にしたものであり、その特徴は
、電話交換機の電子化加入者回路に給電する給電用トラ
ンジスタと、これを駆動する駆動回路と、前記トランジ
スタの温度を測定する温度測定手段と、測定された温度
に従って前記駆動回路を制御する手段とを有し、前記ト
ランジスタが所定の温度以上の時にトランジスタの給電
機能を停止もしくは電流制限する過電流検出保護回路に
おいて、前記温度測定手段が所定の温度で接点を開閉す
る温度検出スイッチである過電流検出保護回路にある。(Problems to be solved by the invention) In order to eliminate these drawbacks, the purpose of the present invention is to provide a protective circuit configuration that eliminates the need for a comparator. The transistor includes a transistor, a drive circuit for driving the transistor, a temperature measuring means for measuring the temperature of the transistor, and a means for controlling the drive circuit according to the measured temperature, and when the transistor is at a predetermined temperature or higher, the transistor is In the overcurrent detection and protection circuit that stops the power supply function or limits the current of the overcurrent detection and protection circuit, the temperature measuring means is in the overcurrent detection and protection circuit which is a temperature detection switch that opens and closes the contact at a predetermined temperature.
（発明の構成および作用）
第３図は、給電用トランジスタの温度を温度検出スイッ
チ（例えば感温リードスイッチ：強磁性体の特性がキュ
リ一温度点を境にして磁性体から非磁性体に変化するこ
とを利用してスイッチをオン、オフさせるスイッチ）で
検出し、この出力で、駆動回路を駆動することにより給
電用トランジスタの機能を停止させる回路を示す図であ
る。(Structure and operation of the invention) Figure 3 shows the temperature of a power supply transistor detected by a temperature detection switch (e.g. a temperature-sensitive reed switch: the characteristics of a ferromagnetic material change from a magnetic material to a non-magnetic material at the Curie temperature point). FIG. 3 is a diagram illustrating a circuit that detects this with a switch that turns the switch on and off by utilizing this phenomenon, and uses this output to drive a drive circuit to stop the function of a power supply transistor.
第４図は、第３図の回路に制御用トランジスタを付加し
、給電用トランジスタに流れる電流を制限する回路を示
す図である。FIG. 4 is a diagram showing a circuit in which a control transistor is added to the circuit of FIG. 3 to limit the current flowing through the power supply transistor.
図中、２０は温度検出スイッチ（感温リードスイッチ）
、 ８．１３はＡＢ線の給電用トランジスタ。In the figure, 20 is a temperature detection switch (temperature-sensitive reed switch)
, 8.13 is the power supply transistor for AB line.
８．１６は通話電流ループにある抵抗器、９，１５は給
電用トランジスタ６．１３のバイアスを決める抵抗器、
７．１２は通話電流ｉを制限するための通話電流制御用
トランジスタ、１０．１４は通話電流ｉを制限するため
の抵抗器、１１は給電用トランジスタ６．１３または制
御用トランジスタ７．１２を駆動する駆動回路である。8.16 is a resistor in the communication current loop, 9 and 15 are resistors that determine the bias of the power supply transistor 6.13,
7.12 is a communication current control transistor for limiting the communication current i, 10.14 is a resistor for limiting the communication current i, and 11 is a power supply transistor 6.13 or a control transistor for driving 7.12. This is a drive circuit that
第３図の電流停止機能を有する加入者回路について説明
する。The subscriber circuit having the current stop function shown in FIG. 3 will be explained.
障害時の過電流により給電用トランジスタ６゜１３の温
度が上昇するとトランジスタ８，１３の近傍に実装した
温度検出スイッチ２０でトランジスタ６．１３周辺の温
度が検出される。これにより、温度検出スイッチ２０で
ある感温リードスイッチの温度がキュリ一温度を越し、
磁気コアの磁化が消滅して、リードスイッチの接点が開
放される。温度検出スイッチ２０の接点開放信号により
通話電流駆動回路１１を駆動させ、給電用トランジスタ
８．１３の機能を停止させ、加入者回路用部品の発゛熱
、発火を防止する。When the temperature of the power supply transistor 6.13 rises due to an overcurrent at the time of a fault, the temperature around the transistor 6.13 is detected by a temperature detection switch 20 mounted near the transistors 8, 13. As a result, the temperature of the temperature-sensitive reed switch, which is the temperature detection switch 20, exceeds one temperature,
The magnetization of the magnetic core disappears, and the contacts of the reed switch are opened. The communication current drive circuit 11 is driven by the contact open signal of the temperature detection switch 20, and the function of the power supply transistor 8.13 is stopped, thereby preventing heat generation and ignition of the subscriber circuit components.
次に、第４図の電流制限機能を有する加入者回路につい
て説明する。Next, the subscriber circuit having the current limiting function shown in FIG. 4 will be explained.
この電流制限用回路も第３図と同様、通話電流Ｉによる
給電用トランジスタ６．１３の温度上昇を温度検出スイ
ッチ２０で検出し、接点信号により通話電流駆動回路１
１を駆動させ、通話電流制御用トランジスタ７．１２を
動作させる。制御用トランジスタ７．１２が動作すれば
、給電用トランジスタ６．１３のバイアス点を決定して
いる抵抗器８゜１５に並列に抵抗器１０．１４が接続さ
れ、抵抗値が減少するため、給電用トランジスタ６．１
３のベース電位が下がり、抵抗器８，１６の両端に加わ
る電位は下がる。つまり通話電流Ｉは減少したことにな
る。故に通話電流ｉを制限することにより、加入者回路
用部品の発熱１発火を防止できる。Similarly to FIG. 3, this current limiting circuit also uses a temperature detection switch 20 to detect the temperature rise of the power supply transistor 6.13 due to the communication current I, and uses a contact signal to detect the temperature increase in the communication current drive circuit 1.
1 is driven to operate the communication current control transistor 7.12. When the control transistor 7.12 operates, the resistor 10.14 is connected in parallel to the resistor 8.15 that determines the bias point of the power supply transistor 6.13, and the resistance value decreases, so the power supply is stopped. Transistor 6.1
The base potential of resistor 3 decreases, and the potential applied across resistors 8 and 16 decreases. In other words, the communication current I has decreased. Therefore, by limiting the communication current i, it is possible to prevent the subscriber circuit components from generating heat and igniting.
（発明の効果）
本発明は温度検出機能とスイッチ機能を有する温度検出
スイー２チを使用しているので比較器を削除することが
出来、実装容積の減少価格削減に効果大である。(Effects of the Invention) Since the present invention uses a temperature detection switch having a temperature detection function and a switch function, the comparator can be omitted, which is highly effective in reducing the mounting volume and cost.
第１図と第２図は従来の過電流保護回路の実施例を示す
図、第３図は本発明の第１の実施例を示す図、第４図は
本発明の第２の実施例を示す図である。
１−ｍ一温度検出素子、
２０−ｍ一温度検出スイッチ、
３、４．５．８．９．１０．１４．１５． ＩＥＩ−ｍ
−抵抗器、１１−ｍ−通話電流駆動回路、
Ｅｌ、 １３−ｍ−給電用トランジスタ、？、 １２−
ｍ−制御用トランジスタ、２−ｍ−比較器。
特許出願人
沖電気工業株式会社
特許出願代理人
弁理士 山本恵−
Ｌ／ 図
番２図
秦３図
＃４ 図
手続補正書（自発）
昭和５８年８月３日
特許庁長官 志賀 手段
１、事件の表示
昭和５８年 特許願 第２２６９３３号２、発明の名称
過電流検出保護回路
３、補正をする者
４代理人
住所 〒１０５ 東京都港区西新橋１丁目５番１２号タ
ンパビル５補正の対象
明細書の特許請求の範囲の欄及び発明の詳細な説明の欄
６補正の内容
（１） 明細書の特許請求の範囲を別紙の通り補正する
。
（２）明細書第３頁第１行の「に給電する給電トランジ
スタ」を「の給電トランジスタ」と補正する。
（３）同第６頁第２行の「減少価格削減」を「減少、価
格削減」と補正する。
以 上
特許請求の範囲
（１）電話交換機の電子化加入者回路の給電用トランジ
スタと、これを駆動する駆動回路と、前記トランジスタ
の温度を測定する温度測定手段と、測定された温度に従
って前記駆動回路を制御する手段とを有し、前記トラン
ジスタが所定の温度以上の時にトランジスタの給電機能
を停止もしくは電流制限する過電流検出保護回路におい
て、前記温度測定手段が所定の温度で接点を開閉する温
度検出スイッチであることを特徴とする過電流検出保護
回路。
（２）前記温度検出スイッチが感温リードスイッチであ
ることを特徴とする特許請求の範囲第１項記載の過電流
検出保護回路。
１１６−1 and 2 are diagrams showing an embodiment of a conventional overcurrent protection circuit, FIG. 3 is a diagram showing a first embodiment of the present invention, and FIG. 4 is a diagram showing a second embodiment of the present invention. FIG. 1-m temperature detection element, 20-m temperature detection switch, 3, 4.5.8.9.10.14.15. IEI-m
-Resistor, 11-m-Speech current drive circuit, El, 13-m-Power supply transistor, ? , 12-
m-control transistor, 2-m-comparator. Patent applicant Oki Electric Industry Co., Ltd. Patent application agent Megumi Yamamoto - L / Drawing number 2 Drawing Hata 3 Drawing #4 Drawing procedure amendment (voluntary) August 3, 1980 Commissioner of the Japan Patent Office Shiga Means 1, Case 1981 Patent Application No. 226933 2 Name of the invention Overcurrent detection protection circuit 3 Person making the amendment 4 Address of agent Tampa Building, 1-5-12 Nishi-Shinbashi, Minato-ku, Tokyo 105 5 Details subject to amendment Contents of amendments in the Claims column and Detailed Description of the Invention column 6 of the specification (1) The claims of the specification will be amended as shown in the attached sheet. (2) In the first line of page 3 of the specification, "power supply transistor that supplies power to" is corrected to "power supply transistor that supplies power to". (3) "Decrease price reduction" in the second line of page 6 is corrected to "decrease, price reduction." Claims (1) A power supply transistor for an electronic subscriber circuit of a telephone exchange, a drive circuit for driving the transistor, a temperature measuring means for measuring the temperature of the transistor, and a drive circuit for driving the transistor according to the measured temperature. In an overcurrent detection and protection circuit that has a means for controlling the circuit and stops the power supply function of the transistor or limits the current when the temperature of the transistor exceeds a predetermined temperature, the temperature at which the temperature measurement means opens and closes the contact at a predetermined temperature. An overcurrent detection protection circuit characterized by being a detection switch. (2) The overcurrent detection and protection circuit according to claim 1, wherein the temperature detection switch is a temperature-sensitive reed switch. 116-
Claims (2)
トランジスタと、これを駆動する駆動回路と、前記トラ
ンジスタの温度を測定する温度測定手段と、測定された
温度に従って前記駆動回路を制御する手段とを有し、前
記トランジスタが所定の温度以上の時にトランジスタの
給電機能を停止もしくは電流制限する過電流検出保護回
部において、前記温度測定手段が所定の温度で接点を開
閉する温度検出スイッチであることを特徴とする過電流
検出保護回路。(1) A power supply transistor that supplies power to an electronic subscriber circuit of a telephone exchange, a drive circuit that drives the same, a temperature measuring means that measures the temperature of the transistor, and a control circuit that controls the drive circuit according to the measured temperature. and wherein the temperature measuring means is a temperature detection switch that opens and closes a contact at a predetermined temperature. An overcurrent detection protection circuit characterized by:
ることを特徴とする特許請求の範囲第１項記載の過電流
検出保護回路。(2) The overcurrent detection and protection circuit according to claim 1, wherein the temperature detection switch is a temperature-sensitive reed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22693383A JPS60120417A (en) | 1983-12-02 | 1983-12-02 | Overcurrent detecting protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22693383A JPS60120417A (en) | 1983-12-02 | 1983-12-02 | Overcurrent detecting protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60120417A true JPS60120417A (en) | 1985-06-27 |
Family
ID=16852877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22693383A Pending JPS60120417A (en) | 1983-12-02 | 1983-12-02 | Overcurrent detecting protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60120417A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0191740A2 (en) * | 1985-01-30 | 1986-08-20 | Telefonaktiebolaget L M Ericsson | Temperature and current protection for quadruple voltage regulator |
| WO2014057711A1 (en) | 2012-10-09 | 2014-04-17 | サンテプラス株式会社 | Wearable binoculars |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048391A (en) * | 1973-09-01 | 1975-04-30 |
-
1983
- 1983-12-02 JP JP22693383A patent/JPS60120417A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048391A (en) * | 1973-09-01 | 1975-04-30 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0191740A2 (en) * | 1985-01-30 | 1986-08-20 | Telefonaktiebolaget L M Ericsson | Temperature and current protection for quadruple voltage regulator |
| WO2014057711A1 (en) | 2012-10-09 | 2014-04-17 | サンテプラス株式会社 | Wearable binoculars |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1903417A3 (en) | Electronic control device comprising a transistor with a tap connection | |
| JPS60120417A (en) | Overcurrent detecting protective circuit | |
| US6717416B2 (en) | Circuit configuration for the voltage supply of a two-wire sensor | |
| JP3099626B2 (en) | Power control unit protection device | |
| JPS6228709Y2 (en) | ||
| US4054845A (en) | Transient and thermal protection | |
| JPH04127846A (en) | Temperature switch unit | |
| JPH08279232A (en) | Overcurrent detecting circuit | |
| JP2602336Y2 (en) | Trance | |
| US6700767B1 (en) | Temperature-based cooling fan controlling structure | |
| JPS5830088A (en) | Safety protecting circuit for electric heater | |
| JPH0534376A (en) | Current detector | |
| KR200254709Y1 (en) | A temperature controlling apparatus of a heating device | |
| JPS60233989A (en) | Degausser | |
| JPH0410374A (en) | Flat exothermic body | |
| JPH0611493Y2 (en) | Heater disconnection detector for switchgear | |
| JPS6111779Y2 (en) | ||
| JPH09103088A (en) | Motor drive circuit | |
| JPH0797742B2 (en) | Drive circuit | |
| JPH01161697A (en) | Fluorescent lamp driving circuit | |
| JPS61132029A (en) | Electronically designed fuse | |
| JPH088616B2 (en) | Call current supply circuit | |
| JPS56138638A (en) | Control circuit for air conditioner | |
| JPH01120169A (en) | Ground-fault protecting circuit for current supply circuit | |
| JPH03204907A (en) | Heat sensitive resistance element equipped with variable resistor |