KR950003485Y1 - Power circuit - Google Patents
Power circuit Download PDFInfo
- Publication number
- KR950003485Y1 KR950003485Y1 KR2019900001699U KR900001699U KR950003485Y1 KR 950003485 Y1 KR950003485 Y1 KR 950003485Y1 KR 2019900001699 U KR2019900001699 U KR 2019900001699U KR 900001699 U KR900001699 U KR 900001699U KR 950003485 Y1 KR950003485 Y1 KR 950003485Y1
- Authority
- KR
- South Korea
- Prior art keywords
- circuit
- switch
- voltage
- switching
- load
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 전원차단회로 2 : 네온램프1: power off circuit 2: neon lamp
3 : 부하 4 : 절환스위치3: Load 4: Switch
F : 휴즈 SW : 구동스위치F: Fuse SW: Drive switch
BD : 정류회로 R1-R3: 저항BD: Rectifier Circuit R 1- R 3 : Resistance
C1-C3: 콘덴서C 1 -C 3 : Capacitor
본 고안은 110/220V 겸용의 각종 전자제품에 있어서 과전압으로부터 보호할 수 있는 전원 전압 절환에 따른 부하 보호회로에 관한 것이다.The present invention relates to a load protection circuit according to power supply voltage switching that can protect against overvoltage in various electronic products for 110 / 220V.
일반적으로 110/220V 겸용의 전자기기는 인입전압에 관계없이 항상 일정전압을 공급하는 자동전압 조정 형태와 사용전압을 인위적으로 선택하는 전압 절환 형태가 주종을 이룬다. 특히 후자의 경우는 사용자가 전압 절환 스위치를 확인한 후 적절한 전압을 선택하면 되나 절환 스위치의 선택전압과 반대의 전압을 사용케 되면 전자기기의 회로 파괴 또는 화재의 위험이 발생하게 된다. 즉 절환 스위치를 220V로 선택시에는 110V 사용으로 인한 위험은 적으나 사용자 실수에 의해 제품의 절환 스위치를 110V로 하고 220V전원을 공급하면 부하에 과전압이 걸려 부품 파괴 또는 화재가 발생하는 문제점이 야기되는 것이다. 그러므로 본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서 110V 선택시에 220V 과전압이 인가되면 네온램프에 의해 쇼트(Short)현상을 일으켜 휴즈를 개방시킴으로서 부하의 회로를 방지토록 하는 전원 전압 조정에 따른 부하 보호회로를 제공함으로서 각종 전자기기의 신뢰성 향상에 기여하고자 하는데 본 고안의 목적이 있는 것이다.In general, 110 / 220V combined electronic devices are mainly composed of an automatic voltage regulation type that always supplies a constant voltage regardless of an incoming voltage and a voltage switching type that artificially selects a working voltage. Especially in the latter case, the user may check the voltage switching switch and select an appropriate voltage. However, if a voltage opposite to the selection voltage of the switching switch is used, a risk of circuit breakdown or fire may occur. In other words, if the switch is set to 220V, the risk of using 110V is small.However, if the switch is set to 110V and 220V power is supplied due to a user's mistake, it may cause overvoltage to the load resulting in parts destruction or fire. will be. Therefore, the present invention was devised to solve the above problems. When 220V overvoltage is applied when 110V is selected, a short phenomenon is caused by a neon lamp to open a fuse to prevent a circuit of load. The purpose of the present invention is to contribute to improving the reliability of various electronic devices by providing a load protection circuit according to the present invention.
이하 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings as follows.
제1도에서와 같이 110/220V의 인입 전압을 휴즈(F)와 구동스위치(SW)를 거쳐 정류회로(BD)와 콘덴서(C1-C3)의 저항(R2-R3) 그리고 절환스위치(4)로 구성된 110/220V 절환 회로를 부하(3)측으로 연결한 통상의 110/220V겸용 회로에 있어서 구동스위치(SW)단에 네온램프(2)와 저항(R1)을 질력 접속하여 절환 스위치(4)의 110V단자에 연결한 전원차단 회로(1)를 부가하여서된 전원전압 조정에 따른 부하보호 회로인 것이다.As shown in FIG. 1, the inlet voltage of 110 / 220V is switched through the fuse F and the driving switch SW, and the resistances R 2 -R 3 of the rectifier circuit BD and the capacitors C 1 -C 3 are switched. In a conventional 110 / 220V dual circuit in which a 110 / 220V switching circuit composed of a switch 4 is connected to the load 3 side, a neon lamp 2 and a resistor R 1 are connected to the driving switch SW stage by force. It is a load protection circuit according to the power supply voltage adjustment which added the power cut-off circuit 1 connected to the 110V terminal of the switching switch 4.
상기와 같은 구성으로 이루어진 본 고안의 작용 효과를 설명하면 다음과 같다.Referring to the effect of the present invention made of the configuration as described above are as follows.
먼제 제1도에 도시한 바와같이 전원 차단회로(1)를 제외한 나머지 회로가 110/220V를 선택하는데 사용하는 통상의 절환회로로 절환스위치(4)를 110V의 위치에 놓았을 때는 콘덴서(C1)(C2)에 의해 전압을 배압하여 부하(3)에 공급하고 있다. 이때 사용자의 실수로 인해 절환스위치(4)를 110V로 세팅하고 220V전압을 인가하면 콘덴서(C3) 양단에는 평상시의 2배 전압이 인가되고 이러한 전압이 부하(3)로 전달되어 결과적으로 부하(3)에 과전압이 걸려 부품 파괴 또는 심한 경우 화재가 발생 되나 전원차단회로(1)에 의해 이를 차단하게 된다.As shown in FIG. 1, when the switching switch 4 is set at 110V, the capacitor C 1 is a normal switching circuit that is used to select 110 / 220V except for the power cutoff circuit 1. The voltage is backed up by C 2 ) and supplied to the load 3. At this time, if the changeover switch 4 is set to 110V and 220V is applied due to a mistake of the user, twice the usual voltage is applied to both ends of the capacitor C 3 , and the voltage is transferred to the load 3, resulting in a load ( 3) Over voltage is applied and parts are broken or a fire occurs in severe cases, but it is blocked by the power cut-off circuit (1).
즉 절환스위치(4)를 110V에 세팅하고 220V가 인가되면 네온램프(2)가 약 160V 전압에서 방점됨에 따라 네온램프(2)와 저항(R1)은 쇼트회로가 형성되어 휴즈(F)를 개방(open) 시킴으로서 부하(3)에 공급되는 전원을 차단하여 과전압으로부터 부하(3)를 보호할 수 있게 되는 것이다.That is, when the switching switch 4 is set to 110V and 220V is applied, the neon lamp 2 is left at about 160V voltage, and thus the neon lamp 2 and the resistor R 1 form a short circuit to form the fuse F. By opening, it is possible to cut off the power supplied to the load 3 to protect the load 3 from overvoltage.
이상에서 상술한 바와같이 작용하는 본 고안은 일반적으로 사용되는 110/220V 절환회로에 네온램프(2)와 저항(R1)을 직렬접속한 전원차단회로(2)를 부가함으로서 사용자의 실수로 220V의 과전압 인가시 휴즈(F)를 차단시켜 부하(3)를 보호할 수 있게 하여 전자기기의 신뢰성 향상에 크게 기여할 수 있는 유용한 고안인 것이다.The present invention, which works as described above, adds a power cut-off circuit (2) in which a neon lamp (2) and a resistor (R 1 ) are connected in series to a 110 / 220V switching circuit, which is generally used. It is a useful design that can greatly contribute to improving the reliability of the electronic device by protecting the load (3) by blocking the fuse (F) when the overvoltage is applied.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900001699U KR950003485Y1 (en) | 1990-02-16 | 1990-02-16 | Power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900001699U KR950003485Y1 (en) | 1990-02-16 | 1990-02-16 | Power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910015955U KR910015955U (en) | 1991-09-25 |
| KR950003485Y1 true KR950003485Y1 (en) | 1995-05-02 |
Family
ID=19296016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019900001699U KR950003485Y1 (en) | 1990-02-16 | 1990-02-16 | Power circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950003485Y1 (en) |
-
1990
- 1990-02-16 KR KR2019900001699U patent/KR950003485Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR910015955U (en) | 1991-09-25 |
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