KR100829238B1 - Free Wattage Electronic Ballast for Fluorescent Lamp - Google Patents

Free Wattage Electronic Ballast for Fluorescent Lamp Download PDF

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KR100829238B1
KR100829238B1 KR1020060083126A KR20060083126A KR100829238B1 KR 100829238 B1 KR100829238 B1 KR 100829238B1 KR 1020060083126 A KR1020060083126 A KR 1020060083126A KR 20060083126 A KR20060083126 A KR 20060083126A KR 100829238 B1 KR100829238 B1 KR 100829238B1
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South Korea
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fluorescent lamp
voltage
frequency
electronic ballast
microcontroller
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KR1020060083126A
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Korean (ko)
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KR20080020127A (en
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강진성
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(주) 아원
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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
    • 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
    • H05B41/282—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
    • H05B41/2821—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 by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—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 by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation

Abstract

본 발명은 프리와트형 형광램프용 전자식 안정기에 관한 것으로, 형광램프의 점등 전압을 검출하여 해당 점등전압을 갖는 형광램프의 종류를 감지하고, 인버터를 펄스 주파수 변조 방식으로 제어하여 형광램프에 맞는 주파수를 출력할 수 있도록 하여 형광램프를 안정적으로 점등시키는 것이다.The present invention relates to an electronic ballast for a pre-watt fluorescent lamp, detects the lighting voltage of the fluorescent lamp, detects the type of fluorescent lamp having the lighting voltage, and controls the inverter by a pulse frequency modulation method to match the frequency of the fluorescent lamp. It is to reliably turn on the fluorescent lamp by outputting.

그리고 고주파에서 저주파로 주파수를 변환시켜 형광램프를 점등시킴으로 소프트스타트가 가능하게 하여 형광램프의 수명을 연장하는 것이다.In addition, by converting the frequency from high frequency to low frequency, the fluorescent lamp is turned on to enable soft start, thereby extending the life of the fluorescent lamp.

형광램프, 안정기, 전압, 펄스주파수변조 Fluorescent Lamp, Ballast, Voltage, Pulse Frequency Modulation

Description

프리와트형 형광램프용 전자식 안정기{Free Wattage Electronic Ballast for Fluorescent Lamp}Electronic ballast for free watt fluorescent lamps {Free Wattage Electronic Ballast for Fluorescent Lamp}

도 1은 종래의 전자식 안정기를 나타내는 블록도1 is a block diagram showing a conventional electronic ballast

도 2는 본 발명에 따른 프리와트형 형광램프용 전자식 안정기를 나타내는 블록도Figure 2 is a block diagram showing an electronic ballast for pre-watt fluorescent lamp according to the present invention

도 3은 도 2의 역률 개선 회로를 나타내는 회로도3 is a circuit diagram illustrating a power factor correction circuit of FIG. 2.

도 4는 도 2의 인버터와 마이크로 컨트롤러를 나타내는 회로도4 is a circuit diagram illustrating an inverter and a microcontroller of FIG. 2.

도 5는 도 2의 전압/전류 검출부를 나타내는 회로도5 is a circuit diagram illustrating a voltage / current detector of FIG. 2.

본 발명은 프리와트형 형광램프용 전자식 안정기에 관한 것으로, 보다 상세하게는 형광램프의 전압을 검출하여 형광램프의 종류를 파악한 후 인버터부의 구동을 제어하여 해당 형광램프에 맞는 주파수로 동작되도록 하여 다양한 형광램프에 공통으로 적용할 수 있는 프리와트형 형광램프용 전자식 안정기에 관한 것이다.The present invention relates to an electronic ballast for pre-watt fluorescent lamps, and more particularly, by detecting the voltage of the fluorescent lamp to grasp the type of fluorescent lamp and controlling the driving of the inverter unit to operate at a frequency suitable for the fluorescent lamp. The present invention relates to an electronic ballast for pre-watt fluorescent lamps that can be commonly applied to fluorescent lamps.

형광램프는 방전관의 일종으로 방전에 필요한 열전자를 방출하기 위하여 초기에 높은 전압이 필요하며 방전 후 형광램프에 인가된 전압은 램프전류가 커지면 반대로 감소하는 부성 저항 특성을 갖고 있다.Fluorescent lamps are a type of discharge tube that require a high voltage initially to emit hot electrons for discharge, and have a negative resistance characteristic that the voltage applied to the fluorescent lamp after discharge decreases as the lamp current increases.

안정기는 초기에는 점등에 필요한 고전압을 공급하여 램프를 점등시키고, 점등 후에는 램프의 전류를 제어하여 일정한 밝기를 유지시켜주는 역할을 한다. 따라서 안정기는 형광램프의 효율과 수명에 직접적인 영향을 준다. The ballast turns on the lamp by supplying the high voltage required for lighting at the beginning and maintains the constant brightness by controlling the current of the lamp after lighting. The ballast thus directly affects the efficiency and lifetime of the fluorescent lamp.

일반적인 전자식 안정기의 원리를 하기에서 살펴본다.The principle of a general electronic ballast is discussed below.

도 1은 종래의 전자식 안정기를 나타내는 블록도이고, 도 2는 종래의 역률 개선 회로를 나타내는 회로도이다.1 is a block diagram showing a conventional electronic ballast, and FIG. 2 is a circuit diagram showing a conventional power factor correction circuit.

종래의 전자식 안정기는 반도체 부품과 수동전자 부품으로 구성된 전자회로를 사용하여 교류 50Hz/60Hz의 전원을 고주파(20kHz~100kHz)로 변환 후 램프전원으로 사용하는 것으로, 도 1에 나타내는 바와 같이 입력측 필터, 정류부, 역률개선회로, 인버터부, 공진부로 구성된다.Conventional electronic ballasts convert an AC 50 Hz / 60 Hz power source into a high frequency (20 kHz to 100 kHz) using an electronic circuit composed of a semiconductor component and a passive electronic component, and then use the lamp power as shown in FIG. 1. It is composed of rectifier, power factor improvement circuit, inverter and resonator.

상기한 구성에서 입력측 필터는 모든 전자기기에 발생하는 전자파장해(EMI)를 억제함으로써 EMI규정에 위배되지 않도록 함과 동시에 타 전자기기에 미치는 악영향을 최소화하는 역할을 하고, 정류부는 상용교류전압(100V~220V/60Hz)을 직류전압으로 변환시켜준다.In the above configuration, the filter on the input side suppresses electromagnetic interference (EMI) generated in all electronic devices so as not to violate the EMI regulations and at the same time minimizes adverse effects on other electronic devices. ~ 220V / 60Hz) is converted into DC voltage.

역률개선회로는 정류부의 직류전압을 승압하는 것이며, 인버터부는 역률개선회로에서 생성된 고주파신호로 입력 직류전압을 고주파전압(구형파)으로 변환 시켜주는 회로이며, 공진부는 인버터부에서 발생된 고주파전압(구형파)을 코일(L), 콘덴서(C)로 구성된 필터를 통하여 정현파로 변환 시켜주는 회로이다.The power factor improvement circuit boosts the DC voltage of the rectifier. The inverter part is a high frequency signal generated by the power factor improvement circuit and converts the input DC voltage into a high frequency voltage (square wave), and the resonator part generates a high frequency voltage ( Square wave) is a circuit that converts a sine wave through a filter composed of a coil (L) and a capacitor (C).

이러한 종래의 안정기는 형광램프에 따라 각 특성에 맞게 설계, 제작되어 있 으며 형광램프 교체시 반드시 안정기에 맞는 정격의 형광램프를 교체해야만 하므로, 사용이 불편하고 형광 램프 설치비가 많이 소요되며 자원 낭비 및 환경오염의 문제점이 있었다.These conventional ballasts are designed and manufactured according to their characteristics according to the fluorescent lamps, and when replacing the fluorescent lamps, the fluorescent lamps rated for the ballast must be replaced. There was a problem of environmental pollution.

상기한 바와 같은 문제점을 해결하기 위한 본 발명의 목적은 형광램프의 점등 전압을 검출하여 해당 점등전압을 갖는 형광램프의 종류를 감지하고, 인버터를 펄스 주파수 변조 방식으로 제어하여 형광램프에 맞는 주파수를 출력할 수 있도록 하여 형광램프를 안정적으로 점등시키는 데 있다.An object of the present invention for solving the above problems is to detect the lighting voltage of the fluorescent lamp to detect the type of fluorescent lamp having the corresponding lighting voltage, and to control the inverter by the pulse frequency modulation method to adjust the frequency corresponding to the fluorescent lamp It is possible to output the fluorescent lamp stably.

그리고 본 발명의 다른 목적은 고주파에서 저주파로 주파수를 변환시켜 형광램프를 점등시킴으로 소프트스타트가 가능하게 하여 형광램프의 수명을 연장하는 데 있다.Another object of the present invention is to extend the life of the fluorescent lamp by enabling a soft start by turning on the fluorescent lamp by converting the frequency from high frequency to low frequency.

상기한 목적을 달성하기 위한 본 발명에 따른 프리와트형 형광램프용 전자식 안정기는, 형광램프에 인가되는 램프 전압과 전류를 검출하는 전압/전류 검출부와, 상기한 전압/전류 검출부로부터 출력되는 신호에 따라 형광램프의 종류를 판단하고, 해당 형광램프에 맞도록 기 설정된 주파수로 인버터부를 구동시키는 마이크로 컨트롤러를 포함하여 구성된다. The electronic ballast for a pre-watt fluorescent lamp according to the present invention for achieving the above object is a voltage / current detection unit for detecting the lamp voltage and current applied to the fluorescent lamp, and the signal output from the voltage / current detection unit described above. The microcontroller is configured to determine the type of fluorescent lamp and to drive the inverter unit at a predetermined frequency to match the fluorescent lamp.

이상과 같은 특징을 갖는 본 발명의 실시예를 하기에서 첨부된 도면을 참조하여 살펴본다.An embodiment of the present invention having the above characteristics will be described with reference to the accompanying drawings.

도 2는 본 발명에 따른 전자식 안정기를 나타내는 블록도이다.2 is a block diagram showing an electronic ballast according to the present invention.

본 발명에 따른 안정기는 전자파 장해를 억제하는 입력측 필터(10), 입력된 상용교류전압을 직류전압으로 변환시켜주는 정류부(20), 정류된 직류전압을 승압시키는 역률개선회로(30), 역률개선회로(30)의 출력전압을 구형파로 변환시키는 인버터부(40), 구형파를 정현파로 변환시키는 공진부(50), 형광램프(60)에 인가되는 전압과 전류를 검출하는 전압/전류 검출부(70)와, 상기한 전압/전류 검출부(70)로부터 출력되는 신호에 따라 형광램프(60)의 종류를 판단하고, 해당 형광램프(60)에 맞도록 기 설정된 주파수로 인버터부(40)를 구동시키는 마이크로 컨트롤러(80)로 구성된다.The ballast according to the present invention, the input filter (10) for suppressing electromagnetic interference, the rectifier 20 for converting the input commercial AC voltage into a DC voltage, the power factor improvement circuit 30 for boosting the rectified DC voltage, power factor improvement Inverter unit 40 for converting the output voltage of the furnace 30 into square waves, resonator unit 50 for converting square waves into sinusoidal waves, and voltage / current detector 70 for detecting voltage and current applied to fluorescent lamp 60. And the type of the fluorescent lamp 60 according to the signal output from the voltage / current detector 70, and drives the inverter unit 40 at a preset frequency to match the fluorescent lamp 60. It consists of a microcontroller 80.

상기한 구성에서 역률개선회로(30)는 도 3에 나타내는 바와 같이 직류전압을 승압하는 것으로, 출력전압(Vo)은 전파 정류된 파형이고 직류전압(VDC)은 인덕터(L)에 의해 승압된 DC 전압이다.In the above configuration, the power factor improving circuit 30 boosts the DC voltage as shown in FIG. 3, and the output voltage Vo is a waveform that is full-wave rectified and the DC voltage V DC is boosted by the inductor L. DC voltage.

상기한 역률개선회로의 기초 동작은 역률개선 아이씨(PFC IC)가 모스에프이티(MOSFET)를 턴온하게 되면 인덕터(L)에 전류가 흐르게 되어 에너지를 축적했다가 모스에프이티(MOSFET, Q1)가 턴오프할 때 인덕터(L)에 흐르던 전류가 다이오드(D1)를 타고 직류전압(VDC)의 콘덴서에 전압을 축적하는 부스트 업 컨버터 동작을 한다.The basic operation of the power factor improvement circuit is that when the PFC IC turns on the MOSFET, a current flows through the inductor L to accumulate energy, and then the MOSFET When turned off, the current flowing in the inductor (L) is a boost-up converter operation to accumulate the voltage in the capacitor of the DC voltage (V DC ) via the diode (D1).

이때 다이오드(D1)는 모스에프이티(MOSFET)가 고속 스위칭을 할 때 빨리 스위칭 동작을 할 수 있도록 품질이 좋은 고속 복구 다이오드(Fast recovery diode)를 사용해야 하며 만일 품질이 좋지 못한 다이오드를 사용했을 경우 소자가 파괴되 거나 변환 효율이 저하되고 또한 역률이 나빠지게 된다.At this time, the diode D1 should use a fast recovery diode of high quality so that the switching operation can be performed quickly when the MOSFET switches at a high speed. Is destroyed or the conversion efficiency is lowered and the power factor is worsened.

그리고 상기한 구성에서 마이크로 컨트롤러(80)는 도 4에 나타내는 바와 같이 펄스주파수변조부(90)를 통해서 인버터부(40)를 구동하는데, 상기한 펄스주파수변조부(90)는 포토커플러로 구성된다.In the above configuration, the microcontroller 80 drives the inverter unit 40 through the pulse frequency modulator 90 as shown in FIG. 4, wherein the pulse frequency modulator 90 is configured as a photocoupler. .

아울러, 형광램프(60)의 초기 점등(이하 1차 점등이라 함)에서 마이크로 컨트롤러(80)는 인버터부(40)를 제어하여 공진부(50)의 공진 주파수보다 높은 주파수로 스위칭시키고 표 1에 나타내는 바와 같이 단계별로 낮은 주파수로 스위칭시켜 포토커플러(U5)를 통하여 펄스주파수변조를 하여 인버터부(40)를 구성하는 하프 브릿지 제어부(U2)의 CT단자를 통하여 하프 브릿지를 구성하는 모스에프이티(Q2,Q3)를 번갈아 온/오프(ON/OFF)하여 형광램프에 적정한 주파수를 인가하여 1차 점등을 완료함으로써, 소프트 스타트가 가능하게 하여, 형광램프의 수명을 연장할 수 있도록 한다.In addition, in the initial lighting (hereinafter referred to as primary lighting) of the fluorescent lamp 60, the microcontroller 80 controls the inverter 40 to switch to a frequency higher than the resonance frequency of the resonator 50, and As shown, by switching to a low frequency step by step to modulate the pulse frequency through the photocoupler (U5) through the CT terminal of the half bridge control unit (U2) constituting the inverter unit 40 By alternately turning on / off Q2 and Q3, applying an appropriate frequency to the fluorescent lamp to complete the primary lighting, soft start is possible and the life of the fluorescent lamp can be extended.

Figure 112006062846387-pat00001
Figure 112006062846387-pat00001

전압/전류 검출부의 구성을 도 5를 참조하여 살펴보면, 형광램프(60)에 1차측이 직렬연결된 트랜스포머(TL2,TL3)와, 애노드가 상기한 트랜스포머(TL2,TL3)의 2차측을 향하여 직렬 연결되고 캐소드가 마이크로 컨트롤러(80)의 입력단과 접속된 다이오드(D13,D16)로 구성되어, 트랜스포머(TL2,TL3)에서 전압을 감지하여 다이오드(D13,D16)를 통해 DC전압 신호를 안정화하여 마이크로 컨트롤러(80)로 입력한다.Looking at the configuration of the voltage / current detection unit with reference to Figure 5, the transformer (TL2, TL3) in which the primary side is connected to the fluorescent lamp 60 in series, the anode is connected in series toward the secondary side of the transformer (TL2, TL3) described above. And the cathode is composed of diodes D13 and D16 connected to the input terminal of the microcontroller 80, and senses the voltage at the transformers TL2 and TL3 to stabilize the DC voltage signal through the diodes D13 and D16. Enter (80).

그리고, 상기한 마이크로 컨트롤러(80)는 전압/전류 검출부(70)로부터 입력된 전압을 기준으로 형광램프(60)의 종류를 판단하는데, 이는 마이크로 컨트롤러(80)에 구비된 메모리에 표 2와 같이 전압별 형광램프 종류 테이블이 기록되어 있어서 형광램프의 종류를 판단한다.In addition, the microcontroller 80 determines the type of the fluorescent lamp 60 on the basis of the voltage input from the voltage / current detector 70, as shown in Table 2 in the memory provided in the microcontroller 80. The fluorescent lamp type table for each voltage is recorded to determine the type of fluorescent lamp.

Figure 112006062846387-pat00002
Figure 112006062846387-pat00002

이와 같이 형광램프의 종류가 판단되면, 해당 형광램프별로 기 설정된 출력 주파수에 따른 PFM(Pulse Frequency Modulation) 신호를 마이크로 컨트롤러(80)가 인버터부(40)로 출력하여 형광램프(60)를 2차 점등시키는데, 그 예로서 20W 형광램프의 경우 50KHz주파수 대역으로 32W 램프의 경우 60KHz로 40W램프의 경우 70KHz로 주파수를 조정한다.When the type of the fluorescent lamp is determined as described above, the microcontroller 80 outputs a PFM (Pulse Frequency Modulation) signal according to a preset output frequency for each fluorescent lamp to the inverter unit 40 to secondary the fluorescent lamp 60. For example, adjust the frequency to 50KHz frequency band for 20W fluorescent lamp, 60KHz for 32W lamp and 70KHz for 40W lamp.

상기한 바와 같이 구성된 본 발명에 의하면 램프전압/전류를 감지하고 감지 전압을 A/D변환하여 최초 설정된 램프의 종류에 맞는 값을 수 msec 안에 찾을 수 있어서, 램프의 종류를 빠르게 파악하여 램프를 안정하게 구동시킬 수 있는 효과가 있다.According to the present invention configured as described above, by detecting the lamp voltage / current and A / D conversion of the detection voltage can find a value suitable for the type of the lamp initially set within a few msec, to quickly determine the type of lamp to stabilize the lamp There is an effect that can be driven.

또한 램프의 종류별로 여러 가지 안정기들을 만들 필요 없이 사용이 가능하여 자원낭비 및 환경오염을 줄일 수 있으며, 생산자 측에서도 램프 종류별로 여러 가지 안정기들을 만들어야 하는 폐단을 없애고 범용적으로 램프를 수용하도록 안정기를 일원화 할 수 있어 원가 절감 효과가 크다.In addition, it is possible to use without having to make various ballasts for each type of lamp, which can reduce resource waste and environmental pollution.In addition, producers unify ballasts to eliminate lamps and make lamps universally The cost saving effect is large.

더욱이, 전자식 안정기에서 마이크로 컨트롤러를 이용하게 됨에 따라 회로의 유연성 및 설계의 폭이 넓어지며, 다양한 기능을 별도의 회로를 구성하지 않고 프로그램에 의하여 제어가 가능하게 되었다.Furthermore, as the microcontroller is used in the electronic ballast, the flexibility of the circuit and the width of the design are widened, and various functions can be controlled by a program without configuring a separate circuit.

Claims (5)

삭제delete 전자파 장해를 억제하는 입력측 필터, 입력된 상용교류전압을 직류전압으로 변환시켜주는 정류부, 정류된 직류전압을 승압시키는 역률개선회로, 역률개선회로의 출력전압을 구형파로 변환시키는 인버터부, 구형파를 정현파로 변환시키는 공진부를 포함하여 구성되는 형광램프용 전자식 안정기에 있어서,Input side filter that suppresses electromagnetic interference, Rectifier for converting input commercial AC voltage into DC voltage, Power factor improvement circuit for boosting rectified DC voltage, Inverter part for converting output voltage of power factor improvement circuit to square wave, Sine wave In the electronic ballast for a fluorescent lamp comprising a resonator to convert to 상기한 형광램프에 인가되는 전압과 전류를 검출하는 전압/전류 검출부와, A voltage / current detector for detecting voltage and current applied to the fluorescent lamp; 상기한 전압/전류 검출부로부터 출력되는 신호에 따라 메모리에 저장된 전압별 형광램프 종류 테이블에 따라서 형광램프의 종류를 판단하고, 해당 형광램프 종류에 따라 메모리에 기 설정된 주파수로 인버터부를 구동시키는 마이크로 컨트롤러로 구성되고,The microcontroller is configured to determine the type of fluorescent lamp according to the fluorescent lamp type table for each voltage stored in the memory according to the signal output from the voltage / current detector and to drive the inverter unit at a frequency preset in the memory according to the corresponding fluorescent lamp type. Composed, 상기한 전압/전류 검출부는 형광램프에 1차측이 직렬연결된 트랜스포머와, 애노드가 상기한 트랜스포머의 2차측을 향하여 직렬 연결되고 캐소드가 마이크로 컨트롤러와 접속된 다이오드로 구성되는 것을 특징으로 하는 프리와트형 형광램프용 전자식 안정기. The voltage / current detector includes a transformer whose primary side is connected in series to a fluorescent lamp, and a diode whose anode is connected in series toward the secondary side of the transformer and whose cathode is connected to a microcontroller. Electronic ballasts for lamps. 제 2항에 있어서, 상기한 마이크로 컨트롤러는 형광램프의 초기 점등시에 인버터부를 제어하여 공진부의 공진 주파수보다 높은 주파수로 스위칭시킨 후, 단계별로 낮은 주파수로 스위칭시키는 것을 특징으로 하는 프리와트형 형광램프용 전자식 안정기.The prewatt fluorescent lamp of claim 2, wherein the microcontroller controls the inverter unit when the fluorescent lamp is initially turned on, switches to a frequency higher than the resonance frequency of the resonance unit, and then switches to a low frequency step by step. Electronic ballast for. 제 2항에 있어서, 상기한 마이크로 컨트롤러는 펄스주파수변조부를 통해서 인버터부를 제어하는 것을 특징으로 하는 프리와트형 형광램프용 전자식 안정기.The electronic ballast of claim 2, wherein the microcontroller controls the inverter unit through a pulse frequency modulator. 제 4항에 있어서, 상기한 펄스주파수변조부는 포토커플러를 사용하는 것을 특징으로 하는 프리와트형 형광램프용 전자식 안정기.The electronic ballast of claim 4, wherein the pulse frequency modulator uses a photocoupler.
KR1020060083126A 2006-08-30 2006-08-30 Free Wattage Electronic Ballast for Fluorescent Lamp KR100829238B1 (en)

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JPH10106784A (en) 1996-09-25 1998-04-24 Matsushita Electric Works Ltd Discharge lamp lighting device
KR20000017945A (en) * 1999-12-30 2000-04-06 주덕영 Free Wattage Electronic Ballast for Fluoresent Lamp
KR100404267B1 (en) 2001-05-25 2003-11-05 화인테크주식회사 Electronic ballast heated at a constant current level

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10106784A (en) 1996-09-25 1998-04-24 Matsushita Electric Works Ltd Discharge lamp lighting device
KR20000017945A (en) * 1999-12-30 2000-04-06 주덕영 Free Wattage Electronic Ballast for Fluoresent Lamp
KR100404267B1 (en) 2001-05-25 2003-11-05 화인테크주식회사 Electronic ballast heated at a constant current level

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