KR900008546B1 - Electronic apparatus for discharge lamps - Google Patents

Electronic apparatus for discharge lamps Download PDF

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KR900008546B1
KR900008546B1 KR1019880004363A KR880004363A KR900008546B1 KR 900008546 B1 KR900008546 B1 KR 900008546B1 KR 1019880004363 A KR1019880004363 A KR 1019880004363A KR 880004363 A KR880004363 A KR 880004363A KR 900008546 B1 KR900008546 B1 KR 900008546B1
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output
resistor
amplifier
voltage
circuit composed
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KR890016882A (en
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임채돈
김종오
이경재
오명환
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임채돈
김종오
이경재
오명환
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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
    • 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
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency

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Abstract

내용 없음.No content.

Description

전자식 형광등 안정기Electronic fluorescent ballast

제1도는 본 발명의 전체적인 블록다이아그램(BLOCK DIAGRAM)1 is a block diagram of the present invention (BLOCK DIAGRAM)

제2도는 본 발명의 전체회로도.2 is an overall circuit diagram of the present invention.

제3도는 본 발명의 제어회로도.3 is a control circuit diagram of the present invention.

본 발명은 입력전압의 변동하에서도 일정한 출력을 유지하도록 하고 안정기 주변온도의 상승 및 과부하시 안정기를 보호하며 전원입력시 형광등부하로 흐르는 과전류를 제한하여 차등으로 점등시킴에 따라 형광등의 램프와 안정기수명을 길게 연장할 수 있음을 특징으로 한 전자식 형광등용 안정기에 관한 것이다.The present invention is to maintain a constant output even when the input voltage fluctuates, to protect the ballast when the ambient temperature rises and overload of the ballast, and to limit the over-current flowing to the fluorescent lamp load when the power supply is turned on by the differential lighting lamp and ballast life It relates to an electronic fluorescent ballast characterized in that it can be extended for a long time.

종래의 전자식 형광등용 안정기를 살펴보면 초기 전원입력시 입력전압의 변동에 대하여 출력전류의 변화가 심하게 되므로 출력전류상승시 형광등 부하로 과전류가 흐르게 되어 형광등의 안정기 및 램프의 파손과 특히 램프의 흑화현상을 초래하여 형광등의 수명을 단축시키는 요인이 되었다.In the conventional electronic ballasts for the fluorescent lamp, the output current changes significantly with respect to the change in the input voltage at the initial power supply, so that overcurrent flows to the fluorescent lamp load when the output current rises, thereby causing damage to the ballast and the lamp, especially the blackening of the lamp. This resulted in a shortening of the lifetime of the fluorescent lamp.

[표 1]TABLE 1

[기존전자식 안정기][Existing Electronic Ballast]

Figure kpo00001
Figure kpo00001

[표 2]TABLE 2

[초기 상승시 안정기 관전류][Stabilizer tube current at initial rise]

Figure kpo00002
Figure kpo00002

표 1과 표 2는 종래의 전자식 안정기로서, 초기점등시 약 1.5초간 방전하는 동안의 입력전압이 정상 전압보다 높아진 상태에서 서서히 일정한 전류로 변하기 때문에 램프의 흑화현상과 형광등 안정기의 수명을 단축시킴은 물론 주위온도의 영향을 받아 화재의 위험성마저 내포하고 있다.Table 1 and Table 2 show the conventional electronic ballasts, which shorten the blackening of the lamps and the lifespan of the fluorescent ballasts because the input voltage during discharge for about 1.5 seconds during initial light-up changes gradually to a constant current. Of course, the risk of fire is also affected by the ambient temperature.

본 발명은 상기 한 종래의 제반 문제점을 해결코자 창출된 것으로서 이를 첨부도면에 의거 상세히 설명하면 다음과 같다.The present invention is created in order to solve the above-mentioned conventional problems, which will be described in detail based on the accompanying drawings.

즉 첨부도면중 제2도에 있어서, 안정기입력전원전압(VC1)은 다이오드(D1-D4)로 구성된 브리지회로와, 다이오드(D5-D7)및 콘덴서(C5), (C6)로 구성된 슬라이서회로에서 형성하게 되는데, 이 전압(VC1)이 회로에 인가되면 콘덴서(C3), (C4) 및 사이리스터(Q2)로 구성된 트리거회로의 출력으로 트랜지스터(TR2)를 트리거시켜 트랜스(T), 검출장치(CB), 콘덴서(C7-C9)로 구성된 공진회로가 형성되므로 상기 공진회로에서 스위칭주파수를 공진시켜 형광등 부하를 방전시킨다.That is, in FIG. 2 of the accompanying drawings, the ballast input power supply voltage (V C1 ) is a bridge circuit composed of diodes (D 1 -D 4 ), diodes (D 5 -D 7 ), and capacitors (C 5 ), (C there is formed in the slicer circuit configured to 6), when the voltage (V C1) is applied to the circuit capacitor (C 3), (C 4) and a thyristor (transistor to the output of the trigger circuit composed of Q 2) (TR 2) Since a resonant circuit composed of a transformer (T), a detector (CB), and a capacitor (C 7 -C 9 ) is formed, the switching frequency is resonated in the resonant circuit to discharge the fluorescent load.

이때 형광등으로 흐르는 관전류는 저항(RB)을 통하여 흐르게 되므로 일정치로 제한되게 되며 이 제한된 관전류는 정상전류의 1/2값으로 초기점등시 형광등 부하로 과전류의 흐름을 억제하게 되어 형광등의 램프도 제한되게 점등되어 형광등의 램프는 일정시간(예컨데 1.5초)동안 서서히 밝아지면서 완전점등이 이루어지게 되는 것이다.At this time, the tube current flowing through the fluorescent lamp is limited to a constant value because it flows through the resistor (R B ), and this limited tube current is 1/2 of the normal current, and it suppresses the flow of overcurrent to the fluorescent load during initial lighting. The lamps of the fluorescent lamps are turned on in a limited manner, and the lamps of the fluorescent lamps gradually brighten for a predetermined time (for example, 1.5 seconds), thereby completely turning on.

제어회로(제3도)에 전압 (Vcc)이 인가되면 저항(R7), 제너다이오드(DZ)에서 기준전압을 만들고 저항(R5-R6), 콘덴서(C10)로 구성된 적분회로에 의해 증폭기(IC1)의 출력은 하이(HIGH)가 된다. 또한 이 증폭기(IC1)의 출력은 저항(R8)을 통해 사이리스터(Q1)를 트리거시키며, 사이리스터(Q1)이 트리거됨에 따라 저항(RB)을 통해 제한된 전류는 사이리스터(Q1)의 동작으로 저항(RB)이 단락되고, 이로 인하여 형광등부하의 제한된 전류를 정상전류로 흐르게 된다. 이러한 제어기능의 동작은 형광등부하의 과전류가 전원스위치 ON시, 관전류의 흐름을 억제하여 무접점 3단점등하게 되므로 형광등부하를 관전류로부터 보호하게 된다. 또한 이때의 증폭기(IC1)의 출력은 다음과 같다.When voltage Vcc is applied to the control circuit (FIG. 3), an integrated circuit composed of resistors (R 5 -R 6 ) and condensers (C 10 ) is made with a reference voltage from resistor (R 7 ) and zener diode (D Z ). As a result, the output of the amplifier I C1 becomes HIGH. The output of this amplifier I C1 also triggers the thyristor Q 1 through the resistor R 8 , and as the thyristor Q 1 is triggered, the limited current through the resistor R B causes the thyristor Q 1 . The resistance R B is short-circuited by the operation of, thereby causing the limited current of the fluorescent load to flow to the normal current. The operation of the control function protects the fluorescent lamp load from the tube current because the overcurrent of the fluorescent lamp load is turned on at the power switch ON, thereby suppressing the flow of the tube current so that the contactless three-stage lighting is performed. In addition, the output of the amplifier I C1 at this time is as follows.

Figure kpo00003
Figure kpo00003

* VZ는 저항(R7)과 제너다이오드 (DZ)로 설정되는 기준전압* V Z is the reference voltage set by resistor (R 7 ) and zener diode (D Z )

* t는 시간*C10(콘덴서), R5(저항)* t is the time * C 10 (capacitor), R 5 (resistance)

* IC1의 임피던스 R9

Figure kpo00004
R8 * Impedance R 9 of I C1
Figure kpo00004
R 8

식 ①에서 볼 수 있듯이 출력은 형광등부하를 완전점등시킨후에도 항상 하이를 유지한다.As can be seen from Equation ①, the output is always high even after the fluorescent lamp load is completely turned on.

그런데, 제3도는 제어회로로서, 저항(R1-R4), 더미스터(RT1), (RT2)로 구성된 과전압검출회로에서 안정기의 입력전원전압(VC1)이 정상전압 이상으로 상승하게 되면 이 전압을 검출하여 입력전압은 저항(R1), (R2), 더미스터(RT1)과 저항(R3), (R4), 더미스터(RT2)로 분할되어 증폭기(IC2)의 (+)비교입력전압을 유도하고 (+)비교입력전압을 유도하고 (+)비교입력전압은 저항(R7)과 제너다이오드(DZ)에 의해 형성된

Figure kpo00005
비교입력기준전압과 증폭기(IC2)에서 비교함으로서
Figure kpo00006
입력전압이
Figure kpo00007
기준전압(VZ)보다 크게 되면 증폭기(IC2)의 출력은 하이가 된다.3 is a control circuit, in which an input power supply voltage VC 1 of a ballast rises above a normal voltage in an overvoltage detection circuit composed of resistors R 1 -R 4 , dummysters RT 1 , and RT 2 . When the voltage is detected, the input voltage is divided into resistors (R 1 ), (R 2 ), dummy (RT 1 ), resistors (R 3 ), (R 4 ) and dummy (RT 2 ). I C2 ) induces a positive comparison input voltage and induces a positive comparison input voltage and a positive comparison input voltage is formed by a resistor R 7 and a zener diode D Z.
Figure kpo00005
By comparing the reference input voltage with the amplifier (I C2 )
Figure kpo00006
Input voltage
Figure kpo00007
When the reference voltage V Z is greater than the output of the amplifier I C2 becomes high.

또한 증폭기(IC2)의 출력은 저항(R9) 콘덴서(C11), 트랜지스터(Tr3)와 제어부(CB)를 동작시키게 되는데 입력전압의 미소한 변동을 제거하여 출력제어부(CB)의 제어특성을 개선하는 콘덴서(C11)및 트랜스(Tr3)와 출력제어부(CB)를 동작시켜 트랜지스터 (Tr3)가 TURN ON되면 트랜지스터(Tr3)의 콜렉터에 연결된 릴레이(RELAY) 가 동작하여 출력제어부가 동작하게 되며 출력제어부(CB)를 통하게 되는 형광등 관전류는 감소하게 되어 스위칭트랜지스터의 스위칭전류도 감소한다.In addition, the output of the amplifier (I C2 ) operates the resistor (R 9 ), the capacitor (C 11 ), the transistor (Tr 3 ), and the control unit (CB). The control of the output control unit (CB) is eliminated by removing a small change in the input voltage. When the transistor Tr 3 is turned on by operating the capacitor C 11 and the transformer Tr 3 and the output control unit CB to improve the characteristics, the relay connected to the collector of the transistor Tr 3 operates and outputs the result. The control unit operates and the fluorescent tube tube current passing through the output control unit CB is reduced, thereby reducing the switching current of the switching transistor.

따라서 스위칭트랜지스터의 출력을 떨어뜨리며 형광등부하를 과전류에서의 동작을 제어해 스위칭트랜지스터에서의 열발생을 억제하며 출력제어 과정중에 입력전압이 정상전압으로 환원되면

Figure kpo00008
비교입력전압은 기준 전압 (VZ)보다 작아져 증폭기(IC2)의 출력은 하이에서 로우(Low)로 된다. 증폭기((IC2)의 출력은 트랜지스터(Tr3)을 TURN OFF시켜 출력제어부(CB)를 멈추게 하며 그 출력은 다음과 같다.Therefore, the output of the switching transistor is reduced and the fluorescent load is controlled by over current to suppress the heat generation in the switching transistor. When the input voltage is reduced to the normal voltage during the output control process,
Figure kpo00008
The comparison input voltage is less than the reference voltage (V Z ) so that the output of the amplifier (I C2 ) goes from high to low. The output of the amplifier I C2 turns the transistor Tr 3 OFF to stop the output control unit CB, and its output is as follows.

Figure kpo00009
Figure kpo00009

Figure kpo00010
증폭기(IC2)입력임피이던스는 ∞로 함
Figure kpo00010
Amplifier (I C2 ) input impedance is ∞

Figure kpo00011
VZ는 저항(R7)과 제너다이오드(DZ)로 형성된 기준전압
Figure kpo00011
V Z is the reference voltage formed by resistor (R 7 ) and zener diode (D Z )

Figure kpo00012
VC1은 안정기 전원전압
Figure kpo00012
V C1 is ballast supply voltage

Figure kpo00013
R1-R4는 저항
Figure kpo00013
R 1 -R 4 is the resistance

또한 더미스터(RT1)의 저항값은 수명이 오래된 형광램프에 관전류가 과도하게 흐르게 되면 스위칭트랜지스터의 스위칭유도 증대하게 되어 트랜지스터에서 열이 발생되며 이 열은 저항(R1-R2), 더미스터(RT1)의 저항값을 감소시켜 저항(R3-R4)전압강하를 상승시킨다.Further more the resistance value of the MR (RT 1) is when the life of the flow tube current is excessive to the old fluorescent lamp is to increase the switching of the switching transistor induction heat is generated in the transistor column resistance (R 1 -R 2), more The resistance value of the MR (RT 1 ) is decreased to increase the resistance (R 3 -R 4 ) voltage drop.

이때 안정기 내부의 온도가 상승하여, 저항(R3-R4)의 상승전압은 기준전압(VZ)보다 크게 되며 이때의 증폭기(IC2)의 출력은 하이로된다. 또한(R3·R4)와 병렬접속되는 더미스터(RT2)는 정특성 저항값을 갖는 회로에서는 더미스터(RT1·RT2)와 공히 사용할 수 있고 어느 하나를 사용해도 특성에는 차이가 없으며 더미스터(RT2)는 정특성 저항값으로 인한 온도상승에 대해 저항(R3·R4)의 전압강하를 시키며 이때, 증폭기(IC2)의 하이출력은 출력제어부를 동작시킨다. 이때의 증폭기(IC2)의 출력 QC는 다음과 같다.At this time, the temperature inside the ballast rises, and the rising voltage of the resistors R 3 -R 4 is greater than the reference voltage V Z , and the output of the amplifier I C2 at this time becomes high. In addition, the dummyster (RT 2 ) connected in parallel with (R 3 · R 4 ) can be used together with the dummyster (RT 1 · RT 2 ) in a circuit having a static resistance value. In addition, the dummyster RT 2 causes the voltage drop of the resistor R 3 · R 4 to rise in temperature due to the static resistance value, and at this time, the high output of the amplifier I C2 operates the output controller. The output Q C of the amplifier I C2 at this time is as follows.

Figure kpo00014
Figure kpo00014

Figure kpo00015
C12는 무시함
Figure kpo00015
Ignore C 12

Figure kpo00016
증폭기(IC2)의 입력임피이던스는 ∞함
Figure kpo00016
Input impedance of amplifier I C2 is ∞

Figure kpo00017
RT1＜R2
Figure kpo00017
RT 1 <R 2

Figure kpo00018
VC1는 안정기 전원전압
Figure kpo00018
VC 1 is ballast supply voltage

Figure kpo00019
RT1는 더미스터
Figure kpo00019
RT 1 is dummyster

[표 3]TABLE 3

[본 발명의 안정기][Stabilizer of the present invention]

Figure kpo00020
Figure kpo00020

[표 4]TABLE 4

[초기 점등시 안정기 관전류][Stabilizer tube current at initial lighting]

Figure kpo00021
Figure kpo00021

표 3과 표 4는 본 발명의 사용상태를 나타낸 특성표로서, 초기점등시 입력전압을 약 1초간 1/2값으로 제한된 관전류가 형광등의 램프를 방전시켜 0.5초간 서서히 밝아지게 하며 0.5초 후에는 일정전압을 공급하므로서 흑화현상은 물론 형광등의 램프와 안정기의 수명을 연장시킬 수 있다.Table 3 and Table 4 are characteristics tables showing the state of use of the present invention.In the initial lighting, the tube current limited to 1/2 of the input voltage for about 1 second discharges the fluorescent lamp and gradually brightens it for 0.5 seconds. By supplying a constant voltage, it is possible to prolong the life of black lamps and fluorescent lamps and ballasts.

위에서 설명한 바와 같이 본원 발명의 특징은 크게 3가지로 나눌 수 있는데 다음과 같다.As described above, the features of the present invention can be divided into three types as follows.

첫째 : 전원스위치를 ON시킬 때 전원스위치검출회로에서 스위치 ON상태를 검출하여 형광등 부하로 흐르는 전류를 제한하여 무접점 3단점등을 시킴으로 형광등 부하를 과전류에서의 방전을 방지하여 형광등 부하를 보호하고, 둘째 : 입력전압이 정상전압 이상으로 상승하게 되면 전압검출회로에서 이상전압을 검출하여 형광등 부하로 흐르는 전류를 제어하여 일정한 출력을 낼 수 있도록 하며, 셋째 : 형광램프가 오래되어 관전류가 과도하게 흐르게 되어 스위칭트랜지스터에서 열이 발생되거나, 안정기 주변온도가 설정온도 이상으로 되면 온도검출 회로에서 이상온도를 검출하여 형광등 부하로 흐르는 전류를 제한하여 스위칭트랜지스터의 파괴를 막고 안정기 내부에서의 열발생을 줄일 수 있는 효과가 있으며 형광등의 성능을 향상시킴과 동시에 그 수명을 장구히 할 수 있는 효과 등이 있다.First: When the power switch is turned on, the power switch detection circuit detects the switch ON state and restricts the current flowing to the fluorescent load to protect the fluorescent load by preventing the fluorescent load from discharging from overcurrent. Second: When the input voltage rises above the normal voltage, the voltage detection circuit detects the abnormal voltage and controls the current flowing to the fluorescent lamp load to produce a constant output. Third: The fluorescent lamp is old and the tube current flows excessively. When heat is generated in the switching transistor or when the ambient temperature of the ballast is higher than the set temperature, the temperature detection circuit detects the abnormal temperature and restricts the current flowing to the fluorescent lamp load to prevent destruction of the switching transistor and reduce heat generation inside the ballast. It is effective and improves the performance of fluorescent lamps. There is such an effect that people can Hebrews equipment.

Claims (1)

다이오드(D1-D4)로 구성된 브리지정류회로와, 다이오드(D5-D7)및 콘덴서(C5-C6)으로 구성된 슬라이서회로와, 콘덴서(C3), (C4)및 사이리스터(Q2)로 구성된 트리거회로와, 이 트리거회로의 출력에 의하여 트랜지스터(TR2)를 트리거시켜 트랜스(T), 검출장치(CB), 콘덴서(C7-C9)로 구성된 공진회로를 형성하고 저항(R7)및 제너다이오드(DZ)에 의한 비교기준전압(VZ)과, 저항(R5-R6)및 콘덴서(C10)으로 구성된 적부회로에 의해 설정되는 비교입력전압을 증폭기(IC1)에서 비교하여 사이리스터(Q1)를 ON, OFF하고, 저항(R2)및 더미스터(RT1)과 저항(R3), (R4)및 더미스터(RT2)에 의하여 (+)비교입력전압을 받은 증폭기(IC2)의 출력을 하이로 하여 저항(R9), 콘덴서(C11), 트랜지스터(Rr3)및 출력제어부(CB)를 제어하는 것을 특징으로 하는 전자식 형광등 안정기.Bridge rectifier circuit composed of diodes (D 1 -D 4 ), slicer circuit composed of diodes (D 5 -D 7 ) and capacitors (C 5 -C 6 ), and capacitors (C 3 ), (C 4 ) and thyristors A trigger circuit composed of (Q 2 ) and a transistor (TR 2 ) triggered by the output of the trigger circuit to generate a resonant circuit composed of a transformer (T), a detector (C B ), and a capacitor (C 7 -C 9 ). The comparison input voltage formed by the comparison circuit (V Z ) formed by the resistor (R 7 ) and the zener diode (D Z ), and by an appropriate circuit composed of the resistors (R 5 -R 6 ) and the capacitor (C 10 ). Is compared in the amplifier I C1 to turn on and off the thyristor Q 1 , and the resistor R 2 and the dummyster RT 1 and the resistors R 3 , R 4 and the dummyster RT 2 . It is characterized by controlling the resistor (R 9 ), the capacitor (C 11 ), the transistor (Rr 3 ) and the output control unit (C B ) by making the output of the amplifier (I C2 ), which has received a positive comparison input voltage, by high. Electronic fluorescent lamp ballast.
KR1019880004363A 1988-04-16 1988-04-16 Electronic apparatus for discharge lamps KR900008546B1 (en)

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