KR940010862A

KR940010862A - Electronic Ballasts for Metal Halide Lamps

Info

Publication number: KR940010862A
Application number: KR1019920019763A
Authority: KR
Inventors: 조성권; 최수현
Original assignee: 오정무; 한국에너지기술연구소
Priority date: 1992-10-26
Filing date: 1992-10-26
Publication date: 1994-05-26
Also published as: KR950005284B1

Abstract

본 발명은 입력전압변동과 온도변화를 검출하여 램프출력을 정격으로 유지시키도록 대응하는 출력주파수로 변환시키도록 하므로서 메탈할라이드 램프 및 램프안정기를 보호하고, 고주파 점등시의 음향적 공명현상을 제거할 수 있도록 한 메탈할라이드 램프용 전자식 안정기에 관한 것으로서, 이는 쵸크코일의 철심과 동선의 무게 및 체적이 상대적으로 커지는 관계로 동손에 의한 전력손실은 물론 심한 발열로 인한 안정기의 내구성에 악영향을 주게되며, 아울러 설치면적을 많이 차지하게 되므로서 관리하기가 용이하지 않은 종래기술의 문제점을 해소하고자 하는 것이다.The present invention protects metal halide lamps and lamp stabilizers by detecting input voltage fluctuations and temperature changes and converts them to corresponding output frequencies to maintain the lamp output at rated voltage, and eliminates acoustic resonance during high frequency lighting. The electronic ballast for the metal halide lamp, which is made to allow the weight and volume of the iron core and copper wire of the choke coil to be relatively large, adversely affects the power loss caused by copper loss and the durability of the ballast due to severe heat generation. In addition, since it takes up a lot of installation area is to solve the problems of the prior art that is not easy to manage.

따라서 본 발명은 전압변동에 의한 조건과 온도변화에 의한 조건을 모두 만족할 수 있도록 전압에 의한 변화를 가변수단을 두어 주파수가 높아지면 임피던스가 커지고, 낮아지면 적어지게 되어 설정된 범위의 높은전압과 낮은전압에서도 균일한 광출력으로 램프를 점등할 수가 있고, 아울러 전압변동과 온도변화를 동시에 검지하는 2중보호구성에 의해 출력주파수를 안정적으로 변환시켜 주므로 자체적으로 보호기능을 갖는 동시에 램프출력을 정격으로 유지할 수강 있을뿐만 아니라 메탈할라이드 램프를 고주파로 점등할시 저주파 생성부에 의해 음향적 공명현상을 제거할 수가 있어 쇼윈도우나 실내조명, 특히 어선의 잡어등용에 적용할 경우 크게 기여할 수가 있다는 효과를 제공하는 것으로, 쇼윈도우나 실내조명 내지는 집어등용 안정기로 채용할 수가 있다.Therefore, in the present invention, the impedance is increased when the frequency is increased, and is decreased when the frequency is increased so that the change caused by voltage is satisfied so that both the condition caused by the voltage change and the condition caused by the temperature change are satisfied, the high voltage and the low voltage of the set range are reduced. The lamp can be turned on with a uniform light output, and the output frequency is stably converted by a double protection scheme that detects voltage fluctuations and temperature changes at the same time. As well as attending the lecture, the low frequency generator can remove the acoustic resonance when the metal halide lamp is turned on at high frequency, so that it can contribute greatly when applied to show windows or indoor lighting, especially fishing boats. Is used as a ballast for show windows or indoor lighting Can.

Description

Electronic Ballasts for Metal Halide Lamps

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명장치에 적용되는 전원회로의 상세회로도,3 is a detailed circuit diagram of a power supply circuit applied to the apparatus of the present invention;

제4도는 본 발명장치에 적용되는 인버터 구동용 발진회로도,4 is an oscillation circuit diagram for driving an inverter applied to the apparatus of the present invention;

제5도는 본 발명장치에 적용되는 램프출력 및 시동회로도.5 is a lamp output and a starting circuit diagram applied to the apparatus of the present invention.

Claims

Rectifying and smoothing the AC input power to output a DC main power supply (MC Vcc) and a circuit operation auxiliary power supply (B ₂ ), and a main voltage (MS Vcc) output from the power supply unit (10). A reference input voltage detector 11 that detects and adjusts an impedance value correspondingly according to a change of an input frequency to obtain a uniform optical output voltage in a set range, and the input AC voltage detected by the reference input voltage detector 11. And a variable frequency drive oscillator 12 function for varying the output frequency to stabilize the light output change of the lamp according to the fluctuation. The voltage variation and temperature change of the reference input voltage detector 11 and the temperature detection circuit 17 The power conversion circuit unit 13 which detects and converts the output frequency of the lamp into the rated output frequency, and detects the output temperature of the power conversion circuit unit 13 so as not to be affected by the rated frequency output of the power conversion circuit unit 13. Start-up at high pressure by superimposing the high voltage pulse on the peak value of the output frequency voltage provided from the temperature detection circuit unit 17 to compensate the fire temperature and the variable frequency drive oscillation unit 12 of the power conversion circuit unit 13. And a lamp output unit 14 which alternately switches the DC bias of the secondary voltage output from the rated conversion circuit unit 13 and the circuit portion 15 to maintain a constant balance between the polarization of the output voltage and the magnetic flux density. And a metal halide lamp configured to interconnect the output feedback unit 16 for feeding back the voltage output from the lamp output unit 14 to the variable frequency drive oscillation unit 12 of the power conversion circuit unit 13. Electronic ballast for.

The power supply unit 10 of claim 1, wherein the power supply unit 10 filters the power supply circuit 10a including the surge absorber TNR, the noise filter coil T, and the capacitors C _{1 to} C ₃ , and then the bridge rectifying unit 10 b. DC power by the high power factor smoothing circuit (10c) consisting of the variable power factor (VR ₁ ), smoothing capacitor (C ₄ , C ₅ ), diodes (D ₁ , D ₂ ) and constant voltage diode (ZD ₁ ) Auxiliary power circuit consisting of variable resistor (VR ₂ ), zener diode (ZD ₁ ), transistor (Tr ₁ ), diode (D ₃ , D ₄ ) and capacitor (C ₇ ) in addition to 250V of voltage (M / S Vcc) An electronic ballast for metal halide lamps, characterized in that a constant voltage of DC 20V (B) is obtained by 10d).

2. The temperature detecting circuit unit 17 according to claim 1, wherein the temperature detecting circuit unit 17 includes a variable resistor VR ₂ for setting the reference potential, an on sensor TS, a constant voltage diode ZD ₃ , a capacitor C ₉ , and resistors R ₃ and R ₄ Electronic ballast for metal halide lamp, characterized in that consisting of.

The reference input voltage detector 11 includes a voltage divider (R ₅ , R ₆ ), a potentiometer (PM ₁ ) (PM ₂ ), a constant voltage diode (ZD ₄ ), a capacitor (C ₉ ), and a diode. (D ₅ ) and a resistor (R ₈ ), and the low frequency generator 18 is placed at the output terminal of the power conversion circuit unit 13 so as to eliminate the acoustic resonance caused by the high frequency when the lamp is lit. An electronic ballast for a metal halide lamp, characterized in that the power conversion circuit unit (13) is operated as a synthesized signal obtained by dividing a high frequency output of a voltage-frequency converter (VFC) as necessary.

2. The lamp output unit 14 according to claim 1, wherein the lamp output unit 14 has a diode D ₉ -D ₁₂ , a capacitor C ₁₃ -C ₁₆ , and a resistor for each inverter transistor Tr ₃ -Tr ₆ , as shown in FIG. 5. R ₁₆ -R ₁₉ ) are respectively provided to configure the first to fourth on and off snubber circuits 20 to 23 in a full bridge manner, and the first to fourth on and off snubber configured in the full bridge manner. The output of the circuit (20-23) is an electronic ballast for the metal halide lamp, characterized in that configured to be applied to the primary coil (T ₂ a) of the output transformer (T ₂ ) through a capacitor (C ₁₇ ).

※ Note: The disclosure is based on the initial application.