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KR900002210B1 - Circuit arrangement for discharge lamps - Google Patents

Circuit arrangement for discharge lamps Download PDF

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Publication number
KR900002210B1
KR900002210B1 KR1019870011903A KR870011903A KR900002210B1 KR 900002210 B1 KR900002210 B1 KR 900002210B1 KR 1019870011903 A KR1019870011903 A KR 1019870011903A KR 870011903 A KR870011903 A KR 870011903A KR 900002210 B1 KR900002210 B1 KR 900002210B1
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South Korea
Prior art keywords
transistor
circuit
turned
capacitor
fluorescent lamp
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KR1019870011903A
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Korean (ko)
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KR890007616A (en
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이상우
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이상우
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/24Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency

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  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

The starting circuit includes a timer (7) for cutting off the preheating current automatically after starting the lamp. The timer includes a relay (RLY) switched by a transistor (55). The transistor (55) is turned off by a transistor (51) turned on by a transistor (49) sequentially. The transistor (49) is turned on by the charging state of a condenser (43).

Description

형광등 점등회로Fluorescent lamp lighting circuit

제 1 도는 본 발명의 전체회로도.1 is an overall circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 정류회로 3 : 스위칭회로1: rectification circuit 3: switching circuit

5 : 형광등회로 7 : 타이머회로5: fluorescent light circuit 7: timer circuit

본 발명은 전자식 형광등 안정기에 있어서 예열전원을 차단하는 타이머회로에 관한 것이다. 형광등을 순간적으로 점등하고 전력의 소모를 감소시키기 위해서 전자식 형광등 안정기가 사용되고 있다. 이러한 전자식 안정기는 재래식 안정기에 비하여 가볍고, 순간 점등이 가능하므로 최근에 많이 사용되고 있다. 현재 사용되고 있는 전자식 안정기는 상용 교류전원을 정류하여, 직류전원으로 바꾸고 DC직류전원을 발전기에 의해 교류로 바꾸어서 점등하는 방식을 사용하고 있다. 이 경우 필라멘트에 예열전류를 가하여 순간 점등을 하고 있다.The present invention relates to a timer circuit for shutting off preheating power in an electronic fluorescent ballast. Electronic fluorescent ballasts are used to instantaneously turn on fluorescent lights and reduce power consumption. Such electronic ballasts are lighter than conventional ballasts, and are widely used in recent years because they can be turned on instantaneously. Currently used electronic ballasts are used to rectify commercial AC power, change to DC power, and DC DC power to alternating current by a generator. In this case, preheating current is applied to the filament to turn it on.

그러나 이 예열전류는 형광등의 점등후에는 불필요한 전력의 소모를 가져오고, 또 형광등의 수명을 단축하는 요인이 되었다. 따라서 본 발명은 예열전류가 일정시간 공급된 후에는 자동으로 차단되는 안정기에 관한 것으로 다음에 본 발명을 도면과 같이 설명한다.However, this preheating current causes unnecessary power consumption after the fluorescent lamp is turned on and shortens the lifetime of the fluorescent lamp. Therefore, the present invention relates to a ballast which is automatically shut off after a preheating current is supplied for a predetermined time.

본 발명은 정류회로(1), 스위칭회로(3)와 형광등회로(5)와 타이머회로(7)로 구성된다. 더 상세히는 정류회로(1)은 4개의 다이오드(11,13,15,17)가 브릿지회로를 형성하여 전파정류기를 이루고 있으며, 정류된 전압은 콘덴서(19)에서 평활화된다. 그러나 본원구성에 반드시 정류회로가 필요한 것은 아니고, 만약 직류전원이 사용된다면 이 직류전원은 직접 스위칭회로(3)에 연결된다. 스위칭회로(3)는 제 1 트랜지스터(25)와 제 2 트랜지스터(35), 제 1 트랜지스터(25)의 베이스에 직렬로 저항(23), 콘덴서(21)과 트랜스포머의 제 3 권선(41)이 연결되고 제 3 권선(41)은 제 1 트랜지스터(25)와 제 2 트랜지스터(35)의 접속점에 연결되며, 제 2 트랜지스터(35)의 베이스는, 제 1 트랜지스터와 같이, 직렬로 연결된 저항(33), 콘덴서(31)과 제 1 권선(45)로 구성된다. 이때 정류된 전원은 제 1 트랜지스터의 콜렉터와 제 2 트랜지스터의 베이스 사이에 연결되고 제 2 트랜지스터의 베이스에는 교류전원이 직접 콘덴서(61)과 다이악(63)으로 구성된 시동회로를 거쳐 인가된다.The present invention is composed of a rectifier circuit 1, a switching circuit 3, a fluorescent lamp circuit 5 and a timer circuit 7. More specifically, in the rectifier circuit 1, four diodes 11, 13, 15, and 17 form a bridge circuit to form a full-wave rectifier, and the rectified voltage is smoothed in the capacitor 19. However, the rectifying circuit is not necessarily required for the present configuration, and if a direct current power source is used, the direct current power source is directly connected to the switching circuit 3. The switching circuit 3 includes the first transistor 25, the second transistor 35, and a resistor 23, a capacitor 21, and a third winding 41 of the transformer in series with the base of the first transistor 25. And a third winding 41 is connected to the connection point of the first transistor 25 and the second transistor 35, and the base of the second transistor 35 is connected in series with the resistor 33, like the first transistor. ), A condenser 31 and a first winding 45. At this time, the rectified power is connected between the collector of the first transistor and the base of the second transistor, and the AC power is directly applied to the base of the second transistor via a starter circuit composed of the capacitor 61 and the diaak 63.

그러나 이러한 시동회로의 구성은 필수적인 구성이 아니고 이것은 스위치를 넣는 순간 스위칭동작을 원활하게 하기 위한 것이다. 형광등회로는 스위칭회로(3)의 제 2 권선(43)의 출력이 쵸크코일(77)을 통해 방전등 한쪽 필라멘트에 인가되고 방전등의 반대편 필라멘트에 직렬로 연결된 콘덴서(83)과 콘덴서(87)의 접속점과 역방향으로 직렬로 연결된 다이오드(85)와 다이오드(89)의 접속점에 연결된 구성으로 되어 있다. 또 형광등의 두 필라멘트 사이에 병렬로 코일(81)과 콘덴서(79) 및 점접(b)가 연결된다. 이때 콘덴서(79)는 형광등의 초기점등시에 필라멘트를 예열하는 작용을 한다.However, the configuration of such a starting circuit is not an essential configuration, and this is to facilitate the switching operation at the moment of switching on. In the fluorescent lamp circuit, the connection point of the capacitor 83 and the capacitor 87 in which the output of the second winding 43 of the switching circuit 3 is applied to one of the discharge lamp filaments through the choke coil 77 and is connected in series to the filament opposite to the discharge lamp It is configured to be connected to the connection point of the diode 85 and the diode 89 connected in series in the reverse direction. A coil 81, a condenser 79, and a contact point b are connected in parallel between two filaments of a fluorescent lamp. At this time, the capacitor 79 serves to preheat the filament during the initial lighting of the fluorescent lamp.

또 접점(b)는 타이머회로의 릴레이(RLY)에 의해 예열용콘덴서(79)의 동작을 제어한다. 타이머회로(7)는 제 1 정류다이오드(37)와 제 2 정류다이오드(39)의 접속점에 저항(41)와 콘덴서(43)을 거쳐 트랜지스터(49)가 연결되고 트랜지스터(49)의 콜렉터는 트랜지스터(51)의 콜렉터는 트랜지스터(55)의 베이스에 연결되고 트랜지스터(55)의 콜렉터는 릴레이(RLY)와 저항(57)을 거쳐 스위칭회로(3)와 정류회로(1)의 접점에 연결되고 에미터는 접지된 구조로 되어 있다. 또 저항(41)와 콘덴서(43)의 접속점에는 제너다이오드(45)가 연결되어 접지되어 있으며 또 트랜지스터(49)의 에미터와 트랜지스터(51)의 에미터의 접속점에 연결되어 있다. 또 트랜지스터(49)의 베이스는 저항(47)을 거쳐 접지된다. 이때 형광등회로(5)의 접점(b)는 릴레이(RLY)에 의하여 ON, OFF된다. 본 발명의 동작은 다음과 같다.The contact point b controls the operation of the preheating capacitor 79 by the relay RLY of the timer circuit. The timer circuit 7 has a transistor 49 connected to the connection point of the first rectifier diode 37 and the second rectifier diode 39 via a resistor 41 and a capacitor 43 and the collector of the transistor 49 is a transistor. The collector of 51 is connected to the base of transistor 55 and the collector of transistor 55 is connected to the contacts of switching circuit 3 and rectifier circuit 1 via relay RLY and resistor 57 and The rotor is grounded. The zener diode 45 is connected and grounded at the connection point of the resistor 41 and the capacitor 43 and is connected to the connection point of the emitter of the transistor 49 and the emitter of the transistor 51. The base of the transistor 49 is grounded via a resistor 47. At this time, the contact b of the fluorescent lamp circuit 5 is turned on and off by the relay RLY. The operation of the present invention is as follows.

전원스위치를 ON시키면 저항(33), 콘덴서(31)과 코일(45)를 통해 전류가 흐르게 되어 트랜스포머의 제 3 권선(41)에 전압을 유기시키므로 트랜지스터(25)을 OFF시킨다. 그러나 콘덴서(61)을 전원이 충전시키고 다이악에 전류가 흐르지 않게 되면, 제 3 권선(41)에 역기전력이 생겨 트랜지스터(25)을 ON시키므로, 전류가 다이오드(65)와 제 1 트랜지스터(25)와 제 2부분권선(43)을 거쳐 형광등회로(5)에 흐르게 되고, 제 1 권선(45)와 제 2 권선(43)에 전압을 유기시켜 제 1 트랜지스터(61)과 제 2 트랜지스터(63)의 ON, OFF에 따라 발진을 계속한다. 이 스위칭회로(3)의 출력은 트랜스포머의 제 2 부분권선(43)를 거쳐 형광등회로(5)에 인가된다. 형광등회로(5)은 형광등의 한쪽의 필라멘트와 다른쪽의 필라멘트 사이에는 병렬로 코일(81)과 콘덴서(79)와 접점(b)이 연결되어 있으므로 전원이 인가되는 초기에는 타이머회로가 동작하지 않아서 접점이 OFF되어 있고 따라서 두 필라멘트 사이에 예열용전류가 형성되어 필라멘트가 순간적으로 예열되므로 순간점등이 가능하다.When the power switch is turned ON, current flows through the resistor 33, the capacitor 31, and the coil 45, thereby inducing a voltage to the third winding 41 of the transformer, thereby turning off the transistor 25. However, when the power supply is charged to the capacitor 61 and no current flows in the diaak, a counter electromotive force is generated in the third winding 41 to turn on the transistor 25, so that the current flows through the diode 65 and the first transistor 25. And the second partial winding 43 flow to the fluorescent lamp circuit 5, and the first and second transistors 61 and 63 are induced by inducing a voltage to the first and second windings 45 and 43. Start oscillation according to ON and OFF. The output of this switching circuit 3 is applied to the fluorescent lamp circuit 5 via the second partial winding 43 of the transformer. In the fluorescent lamp circuit 5, the coil 81, the capacitor 79, and the contact point b are connected in parallel between one filament of the fluorescent lamp and the other filament, so that the timer circuit does not operate at an initial stage when power is applied. The contact is off, so a preheating current is formed between the two filaments, and the filament is preheated momentarily, so instantaneous lighting is possible.

즉 타이머회로는 초기에 콘덴서(43)을 충전할때까지 트랜지스터(49)는 OFF되므로 트랜지스터(51)는 ON이 되고 따라서 트랜지스터(55)가 ON이 되어 릴레이를 구동시켜 점점을 OFF시킨다. 그후 콘덴서(43)가 충전되어 트랜지스터(49)가 ON이 되면 트랜지스터(51)가 OFF되므로 트랜지스터(55) 역시 OFF되어 릴레이는 구동을 정지하므로 접점(b)은 ON된다. 이때 나머지 형광등회로의 동작을 보면 화살표 방향으로 방전등이 정류성을 갖고 있으면 콘덴서의 전압이 높게되나 다이오드를 개재하여 정류회로가 가능하므로 콘덴서의 전압은 정류전압과 다이오드의 ON전압의 합쳐진 전압으로 되지 않는다. 또 방전전류가 화살표에 대하여 역방향으로 정류성을 갖으면 콘덴서의 전압이 높게되나, 다이오드를 개재하여 된 정류가 가능하므로 마찬가지로 콘덴서의 전압은 억제된다. 따라서 이러한 회로구성은 방전등이 정류성을 갖고 있어도 콘덴서 전압을 억제하는 효과를 갖고 있다.That is, since the timer 49 initially turns off the transistor 49 until the capacitor 43 is charged, the transistor 51 is turned on, and thus the transistor 55 is turned on to drive the relay to turn off the signal gradually. After that, when the capacitor 43 is charged and the transistor 49 is turned on, the transistor 51 is turned off, so the transistor 55 is also turned off and the relay stops driving, so the contact point b is turned on. At this time, when the discharge lamp has rectification in the direction of the arrow, the voltage of the capacitor becomes high, but the rectifier circuit is possible through the diode, so the voltage of the capacitor does not become the sum of the rectified voltage and the ON voltage of the diode. . In addition, if the discharge current has rectification in the opposite direction to the arrow, the voltage of the capacitor becomes high, but the voltage of the capacitor is similarly suppressed since rectification through a diode is possible. Therefore, such a circuit structure has the effect of suppressing the capacitor voltage even if the discharge lamp has the rectification property.

따라서 본 발명은 필라멘트의 예열에 의하여 순간점등이 가능하고, 또 예열후에는 예열회로가 타이머에 의하여 자동으로 차단되므로 전력의 소모가 감소되고 또 형광등의 수명을 연장할 수 있는 것이다.Therefore, the present invention can be instantaneous light by the preheating of the filament, and since the preheating circuit is automatically cut off by the timer after the preheating, the power consumption is reduced and the life of the fluorescent lamp can be extended.

Claims (1)

정류회로(1), 스위칭회로(3) 및 형광등회로(5)로 구성된 형광등점등회로에 있어서, 형광등회로(5)에 콘덴서(79) 및 코일(81)과 병렬로 릴레이(RLY)에 의해 제어되는 접점(b)를 형성시키고, 릴레이(RLY)를 트랜지스터(55)에 의해 스위칭되도록 하되, 콘덴서(43)의 충전에 따라 트랜지스터(49)가 도통되게 하고 트랜지스터(49)의 도통으로 OFF되는 트랜지스터(51)에 의해 트랜지스터(55)가 OFF되어 릴레이(RLY)가 구동을 정지하여 접점(b)이 ON되도록 형성시킨 타이머회로(7)를 부가하여서된 형광등 점등회로.In the fluorescent lamp circuit consisting of the rectifier circuit 1, the switching circuit 3 and the fluorescent lamp circuit 5, the fluorescent lamp circuit 5 is controlled by a relay RLY in parallel with the capacitor 79 and the coil 81. A transistor b to be formed, and the relay RLY is switched by the transistor 55, but the transistor 49 is turned on as the capacitor 43 is charged, and the transistor is turned off by the conduction of the transistor 49. A fluorescent lamp lighting circuit is added by adding a timer circuit 7 in which the transistor 55 is turned off by the 51 and the relay RLY stops driving and the contact b is turned on.
KR1019870011903A 1987-10-26 1987-10-26 Circuit arrangement for discharge lamps KR900002210B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870011903A KR900002210B1 (en) 1987-10-26 1987-10-26 Circuit arrangement for discharge lamps

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Application Number Priority Date Filing Date Title
KR1019870011903A KR900002210B1 (en) 1987-10-26 1987-10-26 Circuit arrangement for discharge lamps

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KR890007616A KR890007616A (en) 1989-06-20
KR900002210B1 true KR900002210B1 (en) 1990-04-04

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