KR930008402Y1 - Starting switch using variable inductance type - Google Patents
Starting switch using variable inductance type Download PDFInfo
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- KR930008402Y1 KR930008402Y1 KR2019900016489U KR900016489U KR930008402Y1 KR 930008402 Y1 KR930008402 Y1 KR 930008402Y1 KR 2019900016489 U KR2019900016489 U KR 2019900016489U KR 900016489 U KR900016489 U KR 900016489U KR 930008402 Y1 KR930008402 Y1 KR 930008402Y1
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- choke coil
- current
- lamp
- output
- variable inductance
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
내용 없음.No content.
Description
제 1 도 종래의 전자식 안정기 회로도.1 is a conventional electronic ballast circuit diagram.
제 2 도는 종래의 전자식 안정기 출력 회로도.2 is a conventional electronic ballast output circuit diagram.
제 3 도는 본 고안의 가변인덕턴스형 전자식 안정기 회로도.3 is a circuit diagram of a variable inductance type electronic ballast of the present invention.
제 4 도는 본 고안의 가변인덕턴스형 전자식 안정기 출력에 따른 실시예 1의 회로도.4 is a circuit diagram of Embodiment 1 according to the variable inductance type electronic ballast output of the present invention.
제 5 도는 본 고안의 가변인덕턴스형 전자식 안정기 출력에 따른 실시예 2의 회로도.5 is a circuit diagram of Embodiment 2 according to the output of the variable inductance type electronic ballast of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 입력전원회로 2 : 정류회로1: input power circuit 2: rectifier circuit
3 : 인버터회로 L, L1, L2: 쵸크코일3: inverter circuit L, L 1 , L 2 : choke coil
TR1, TR2: 트랜지스터 C : 콘덴서TR 1 , TR 2 : Transistor C: Capacitor
D : 다이오드 LP : 형광등 램프D: Diode LP: Fluorescent Lamp
S1, S2: 온도 스위치S 1 , S 2 : temperature switch
본 고안은 형광등 램프를 점등시키기 위한 전자식 안정기에 관한 것으로서, 특히 가변인덕턴스 변환방식을 이용하여 형광등 램프를 점등시킬 수 있게한 전자식 안정기를 안출하여 보다 신뢰성 있게 안정기를 얻고자 한 것에 주안점을 둔 것에 관한 것이다.The present invention relates to an electronic ballast for lighting a fluorescent lamp, and more particularly, to an electronic ballast capable of lighting a fluorescent lamp by using a variable inductance conversion method and to focus on obtaining a more stable ballast. will be.
현재까지 개발된 형광등 램프 전자식 안정기는 에너지를 절약하는 측면에서 약30% 정도의 절전효과를 가져왔으나, 외부요인에 의한 전기적 특성이나 충격전압 및 고전압에 대한 보호를 할수 없어서 수명이 단축되었다.Fluorescent lamp electronic ballast developed until now has about 30% energy saving effect in terms of energy saving, but its life is shortened because it cannot protect against electrical characteristics, impact voltage and high voltage by external factors.
더욱이 전원전압이 상승될시에는 램프에 전류가 증가하여 파워트랜지스터의 온도가 급격히 상승함에 따라서 이 트랜지스터가 파손되어 램프 수명을 단축시키는 문제점을 가지고 있었다.In addition, when the power supply voltage is increased, the current increases in the lamp, so that the temperature of the power transistor is rapidly increased, which causes the transistor to be damaged and shorten the lamp life.
즉, 종래에는 제 1 도와 같이 전원입력 회로(1)와 정류회로(2) 그리고 인버터회로(3)를 구성하는데, 이 인버터회로(3)의 고주파 쵸크코일(L)에 램프(LP)가 직렬로 연결되어 있으므로써 전원전압이 상승되면 인버터 출력의 고주파 전류 전압도 상승되어 램프전류를 증가시킴과, 동시 파워트랜지스터(TR1, TR2)의 온도를 급격히 상승시키게 되어 파워트랜지스터를 파괴시킬수가 있을뿐만 아니라 램프수면을 단축시키는 요인으로 지적되어 왔다.That is, conventionally, the power input circuit 1, the rectifier circuit 2 and the inverter circuit 3 are constituted as in the first diagram, and the lamp LP is in series with the high frequency choke coil L of the inverter circuit 3. When the power supply voltage increases, the high-frequency current voltage of the inverter output also increases, increasing the lamp current, and rapidly increasing the temperature of the simultaneous power transistors TR 1 and TR 2 , which can destroy the power transistor. In addition, it has been pointed out as a factor to shorten the lamp sleep.
따라서, 본 고안은 상기와 같은 종래의 문제점을 해결하고자 파워 트랜지스터가 파괴되는 것을 방지하여 전압 상승에 대비할 수 있게 하므로서 램프수명을 연장시키는데, 기여할 수 있도록한 것에 목적을 둔 것이다.Accordingly, the present invention aims to contribute to extending the lamp life by preventing the power transistor from being destroyed to prepare for a voltage increase in order to solve the conventional problems as described above.
상기와 같은 목적을 달성하고자 본 고안은 가변인덕턴스를 직렬결합시키고 보조인덕턴스 양단에 온도스위치를 병렬로 연결함으로써, 정격전압에서 정상적으로 동작할시는 온도스위치가 온 상태를 유지하도록 하고 전압 상승으로 인한 과전류 상태가 되면 온도스위치가 오프되어 작동하여 가변인덕턴스와 보조인덕턴스가 직렬상태로서 과전류를 제한하도록 하므로서 정격램프 전류로 유지시킬 수 있도록 한 것이다.In order to achieve the above object, the present invention combines the variable inductance in series and connects the temperature switch in parallel to both ends of the auxiliary inductance, so that the temperature switch is kept on when operating normally at the rated voltage and overcurrent due to the voltage rise. In this state, the temperature switch is turned off to operate the variable inductance and the auxiliary inductance in series to limit the overcurrent to maintain the rated lamp current.
이하 본 고안의 실시예를 첨부도면의 실시예에 따라서 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described according to an embodiment of the accompanying drawings.
즉 제 3 도와 같이 전원입력회로(1)의 AC전원은 정류회로(2)를 통해 정류 및 평활되어 직류로 공급되어, 이직류 전원에 의한 인버터회로(3)는 트랜지스터(TR1)(TR2)가 교호적으로 스위칭되어 트랜스(CT)의 2차측에 전압이 유기되도록 하고, 이 트랜스(CT)의 출력전압은 쵸크코일(L1)을 통해 램프(LP)가 점등되도록한 전자식 안정기에 있어서, 상기 인버터회로(3)의 쵸크코일(L1)과 램프(LP)사이에 트랜지스터(TR1)(TR2)의 온도를 감지하는 온도스위치(S1)(S2)와 전류제한용 보조 쵸크코일(L2)을 병렬로 연결하면서 정격전압 또는 정격전압 이상에 따라 온도스위치(S1)(S2)가 개폐되어 쵸크코일(L1) 또는 쵸크코일(L1)과 보조쵸크코일(L2)의 리액턴스 합산값에 의해 출력 전류를 가감 제한하도록 구성한 것이다.I.e., AC power to the power input circuit 1, as the third help is rectified and smoothed by the rectifier circuit 2 is supplied to the direct current, the inverter circuit 3 due to the turnover current power transistor (TR 1) (TR 2 ) Is alternately switched so that the voltage is induced on the secondary side of the transformer (CT), and the output voltage of the transformer (CT) is an electronic ballast in which the lamp (LP) is turned on through the choke coil (L 1 ). A temperature switch (S 1 ) (S 2 ) for sensing the temperature of the transistor (TR 1 ) (TR 2 ) between the choke coil (L 1 ) and the lamp (LP) of the inverter circuit (3) and the current limiting auxiliary While connecting the choke coil (L 2 ) in parallel, the temperature switch (S 1 ) (S 2 ) is opened and closed according to the rated voltage or the rated voltage or more, and the choke coil (L 1 ) or choke coil (L 1 ) and the auxiliary choke coil ( It is configured to limit the output current by the sum of reactance of L 2 ).
또한 상기한 온도스위치(S1)(S2)는 제 5 도와 같이 쵸크코일(L)의 중간 탭단자와 말단사이에 병렬로 연결시켜서 전류를 제한할 수도 있게 구성할 수도 있다.In addition, the temperature switch (S 1 ) (S 2 ) may be configured to limit the current by connecting in parallel between the middle tap terminal and the end of the choke coil (L) like the fifth diagram.
여기서 상기한 제 3 도 또는 제 4 도를 미설명부호 C1, C2는 콘덴서이고, D1, D2는 다이오드이며 R1, R2는 저항을 나타낸 것으로서 출력 트랜지스터(TR1)(TR2)를 보호하기 위한 스너버회로이다.3 or 4, reference numerals C 1 and C 2 are capacitors, D 1 and D 2 are diodes, and R 1 and R 2 are resistors. The output transistors TR 1 and TR 2 are shown. ) Is a snubber circuit for protection.
이와같이 구성된 본 고안의 동작 및 작용효과를 설명하면 다음과 같다.Referring to the operation and effect of the present invention configured as described above are as follows.
제 3 도, 제 4 도, 제 5 도의 인버터회로(3)에서는 트랜지스터(TR1)의 에미터 단자와 트랜지스터(TR1)에 미터 단자와 트랜지스터(TR2)콜렉터 단자와 접속된 단자점 정류회로(2)에서 출력되는 직류전압에 의해 트랜지스터(TR1)(TR2)가 교호상태로 스위칭되기 때문에 구형파의 고주파 전류가 출력된다.FIG. 3, FIG. 4, a separate fifth inverter circuit 3, the transistor (TR 1), the emitter terminal and the transistor (TR 1) to the meter terminal and the transistor (TR 2) that the terminal connected to the collector terminal rectifier circuit Since the transistors TR 1 and TR 2 are switched to the alternating state by the DC voltage output from (2), the high frequency current of the square wave is output.
이때 출력되는 구형파 고주파 전류가 예컨데 정격전압 상태에서는 온도스위치(S1)가 온되어 고주파 쵸크코일(L1)과 온도스위치(S1)를 거쳐서 구형파가 거의 정현파로 필터링되어 램프(LP)를 점등시킨다.At this time, the square wave high frequency current output, for example, in the rated voltage state, the temperature switch S 1 is turned on, and the square wave is almost sine wave filtered through the high frequency choke coil L 1 and the temperature switch S 1 to light the lamp LP. Let's do it.
이때 점등되어 램프(LP)는 코일(L1)의 인덕턴스 값과 출력주파수에 따라서 결정되는 리액턴스(XL1)에 의하여 정격램프 전류로 제한시켜 주는 한류(限流) 작용으로 점등된다.At this time, the lamp LP is turned on by the current-limiting action of limiting the rated lamp current by the reactance XL 1 determined according to the inductance value of the coil L 1 and the output frequency.
그러나, 상기한 구형파 전류가 전원전압이 정격전압 이상으로 상승되면 정류회로(2)의 직류전압이 상승되고, 이에따른 인버터회로(3)의 출력고주파 전압도 높아져 트랜지스터(TR1)(TR2)의 온도도 급격히 상승되는데, 이때의 상승온도가 온도스위치(S1)(S2)의 설정온도보다 이상이면 이를 감지하는 온도스위치(S1)(S2)가 오프된다.However, when the square wave current rises above the rated voltage, the DC voltage of the rectifier circuit 2 increases, and accordingly, the output high frequency voltage of the inverter circuit 3 also increases, resulting in a transistor TR 1 (TR 2 ). The temperature of the temperature rises rapidly, and the temperature switch (S 1 ) (S 2 ) for detecting the rising temperature at this time is higher than the set temperature of the temperature switch (S 1 ) (S 2 ) is turned off.
이에따라 인버터회로(3)의 출력전류는 쵸크코일(L1)이 보조쵸크코일(L2)을 통하여 램프(LP)에 인가되는데, 이때 램프(LP)에 인가되는 상승전류는 두 코일(L1)(L2)의 리엑턴스 합산값(XL1+XL2)에 의해 제한되어 정격전압 상태에서와 같은 값의 전류로 감소되어 출력된다.Accordingly, the output current of the inverter circuit 3 is applied to the lamp LP through the choke coil L 1 through the auxiliary choke coil L 2 , and the rising current applied to the lamp LP is two coils L 1. It is limited by the sum of reactance (XL 1 + XL 2 ) of) (L 2 ) and is reduced to the same current as the rated voltage and output.
따라서 상기 출력전류의 감소는 트랜지스터(TR2)의 전류를 감소시킴과 동시 과온도를 내리게 하여 안정기를 과전압에서 보호하게 된다.Therefore, the reduction of the output current reduces the current of the transistor TR 2 and simultaneously lowers the overtemperature, thereby protecting the ballast from overvoltage.
그리고 제 5 도와 같이 온도스위치(S1)(S2)를 쵸크코일(L)의 중간탭에 연결하였을 경우 별도의 보조인턱턴스를 변환하는 동작은 전술한 제 4 도의 설명과 동일하게 이루어진다.And when the temperature switch (S 1 ) (S 2 ) is connected to the middle tap of the choke coil (L) as shown in FIG. 5, the operation of converting a separate auxiliary inductance is the same as described in FIG.
상기에서 온도스위치(S1)(S2)가 동작되는 설정온도 약 70℃－80℃에서 작동되게 하고, 쵸크코일(AL1)과 보조쵸크코일(L2)의 비는 10:1정도로 설정하는 것이 가장 이상적이다.In the above, the temperature switch (S 1 ) (S 2 ) is operated at a set temperature of about 70 ℃ ~ 80 ℃, the ratio of the choke coil (AL 1 ) and the auxiliary choke coil (L 2 ) is set to about 10: 1. Ideally.
이와같이 본 고안은 트랜지스터의 온도에 따라서 쵸크코일의 인덕턴스 값이나 또는 쵸크코일과 보조쵸크코일(L2)의 인덕턴스 값에 의해서 전류를 제한하도록 하므로서 트랜지스터가 파괴되는 것을 방지하고 램프에 과전류가 흐르는 것을 방지하게 되어 안정기 내지는 램프 수명을 연장시킬수 있게 된 것이다.In this way, the present invention allows the current to be limited by the inductance value of the choke coil or the inductance values of the choke coil and the auxiliary choke coil (L 2 ) according to the transistor temperature, thereby preventing the transistor from being destroyed and preventing overcurrent from flowing into the lamp. This will extend the ballast or lamp life.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900016489U KR930008402Y1 (en) | 1990-10-30 | 1990-10-30 | Starting switch using variable inductance type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900016489U KR930008402Y1 (en) | 1990-10-30 | 1990-10-30 | Starting switch using variable inductance type |
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| Publication Number | Publication Date |
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| KR920008659U KR920008659U (en) | 1992-05-20 |
| KR930008402Y1 true KR930008402Y1 (en) | 1993-12-22 |
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| KR2019900016489U KR930008402Y1 (en) | 1990-10-30 | 1990-10-30 | Starting switch using variable inductance type |
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| KR20040071471A (en) * | 2003-02-06 | 2004-08-12 | 주식회사 피엔케이텍 | hybrid ballast of discharge lamp for controlling illumination intensity |
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