• Title/Summary/Keyword: A high voltage igniter circuit

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A Study on the Power Supply System for the Arc Lamp (아크램프를 위한 전원공급 시스템의 연구)

  • La, Jae Du
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.67 no.3
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    • pp.125-130
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    • 2018
  • Arc lamps are now widely utilized as illumination sources for a large number of investigations in wide-field fluorescence microscopy. Among many power converters for the lamp, the PSFB (Phase-Shift Full-Bridge) converter with the ZVS (Zero Voltage Switching) is the most widely used soft switched circuit in high-power applications. Also, in the most luminaries, the power factor has to be more and more important. Thus, the power factor correction(PFC) must be included in the power system. A new igniter module using the switching power device and the transformer is proposed instead of the conventional igniter using the mechanical contactor. The proposed converter with the high power factor and high efficiency is verified through the experimental works.

The Development of Electric Ballast for a Instant Start/Restart of Metalhalide Lamp (메탈핼라이드램프용 순시점등/재점등 전자식안정기 개발)

  • Kim, Su-Kyoung;Jang, Woo-Jin
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.5
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    • pp.9-15
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    • 2004
  • The most shortcoming of metalhalide lamps is what the instant restarting cannot be realized when the arc tube is in the hot condition. The discharge starting voltage of arc tube in the hot condition is much higher than in the cold condition. Therefore it takes about five minutes to restart the metalhalide lamps, that is to say, it is possible to start when the pressure and the temperature are decreased. But, if the lamp is restarted in the hot condition, we must supply the high voltage pulse with 20[kV] at the both electrode of lamp. The proposed electronic ballast is consist of a electromagnetic interference(EMI) filter, a power factor correction(PFC) circuit, a flyback converter, a half-bridge inverter, and a high voltage igniter circuit. By this composition we can start/restart the lamp with the voltage 20[kV], even if the lamp is in the hot condition.

The Development of Electric Ballast for a Instant Restart of Metalhalide Lamp (메탈헬라이드램프용 순시재점등 전자식안정기 개발)

  • 김수경;장우진
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2003.11a
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    • pp.185-190
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    • 2003
  • The most shortcoming of metalhalide lamps is what the instant restarting cannot be realized when the arc tube is in the hot condition. The discharge starting voltage of arc tube in the hot condition is much higher than in the cold condition. Therefore it takes about five minutes to restart the metalhalide lamps, that is to say, it is possible to start when the pressure and the temperature are decreased. But, if the lamp is restarted in the hot condition, we must supply the high voltage pulse with 20kV at the both sides of lamp. The proposed electronic ballast is consist of a electromagnetic interference (EMI) filter, a power factor correction (PFC) circuit, a flyback converter, a half-bridge inverter, and a high voltage igniter circuit. By this composition we can restart the lamp with the voltage 20kV, even if the lamp is in the hot condition.

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Analysis and Design of the ignitor for Metal Halide Lamp driven by Full-Bridge Inverter (풀 브리지 인버터에 적합한 메탈 핼라이드 램프용 점화기의 해석 및 설계)

  • Park, Chong-Yun;Lee, Bong-Jin
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.8
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    • pp.20-26
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    • 2007
  • A high ignition voltage is required to turn on the metal halide discharge(MHD) lamp. The igniter with high frequency resonance circuit needs more devices, such as sidac, arc-gab, SCR(silicon control rectifier), DIAC and so of which increase the complexity and decrease the reliability of the ignitor. This paper analyzes and designs a simple LC resonance type igniter without any extra switch devices. Moreover, the igniter will not influence the steady-state operation of the lamp. Through the mathematical analysis, the computer simulation and experiment results of a prototype ballast for 1[kW] metal halide lamp(MHL) lamp, the proposed igniter was verified to be effective.

Characteristics of High Voltage Discharge using Triggered Spark Gap (Trigged Spark Gap의 고전압 방전제어특성 연구)

  • Son, Yoon-Gyu;Kim, Kwang-Gi;Park, Sang-Wook;Cho, Moo-Hyun
    • Proceedings of the KIEE Conference
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    • 1997.07e
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    • pp.1816-1818
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    • 1997
  • A triggered sparkp gap switch was fabricater and its high-voltage discharge characteristics were studied. The switch is composed of two main electrodes and one trigger electrode which is placed perpendicular to the main one. Spark gap distance was fixed by 25 mm. This device has been operated without self firing at the pulse repetition frequency from 1 to 20 Hz limited by the charging current, and the hold-off voltage from 10 to 30kV. An IGBT switch and igniter coil (originally used in a car) were adopted for a trigger circuit. In this article preliminary switch characteristics of the spark gap switch are reported with the emphasis on the description of the trigger circuit.

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A Study on an Effective Drive of High Intensity Discharge(HID) Lamp Ballast for Cars (자동차 고광도 방전 램프용 안정기의 효과적 드라이브에 관한 연구)

  • Jeong, Gang-Youl
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.4
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    • pp.231-237
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    • 2006
  • This paper proposes an effective drive of high intensity discharge (HID) lamp ballast for cars. All control functions of the proposed ballast are implemented using a low-cost single chip microcontroller, PIC16C73 to optimize the total system size and to minimize cost through minimization of total component number. The proposed ballast generates high open-circuit voltage to ignite the lamp and is controlled to supply effectively the power required to shorten warm-up period after the breakdown. The DC-DC converter of the DC-AC converter part of the ballast utilizes the flyback converter topology that can minimize component number. Also, because to more minimize the ballast size, the transformer size must be minimized, for this, PWM (Pulse Width Modulation) pulses are generated with high frequency using the PWM module of the microcontroller. An analysis for this is explained, briefly. As if the operation of the lamp and ballast arrives at steady-state, then the ballast must AC-control the lamp, for this, the microcontroller utilizes the other PWM module. And the part related to the igniter is explained, briefly. It is shown through experimental results that the controller of the proposed ballast has good performance for the HID lamp for cars.

The Design and Test of the Electronic Arm Fire Device Circuit (전자식 점화안전장치 회로부 설계 및 검증)

  • Gim, Hakseong;Hwang, Jung-Min;Jang, Seung-gyo;Kim, Jae-Hoon;Hwang, Dae-Gyu
    • Journal of the Korea Institute of Military Science and Technology
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    • v.21 no.6
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    • pp.857-864
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    • 2018
  • This paper describes about the circuit design and test of the electronic Arm Fire Device. Electronic arm fire device consists of igniter, circuit and housing case and it operates without the actuator such as torque motor or solenoid. A high-voltage DC-DC converter was used to generate the voltage for initiating the LEEFI(Low Energy Exploding Foil Initiator). The MEMS switch was used to detect the acceleration that occurs when missile is launched, and the circuit was designed considering the size, performance, and specification of the electronic devices. The performance test was conducted to verify the designed circuit and we confirmed that it operates well.

Design of Electronic Ballast for 35[W] Ceramic Metal Halide Lamp by DBI Structure (DBI 구조를 이용한 35[W] 세라믹 메탈 할라이드 램프용 전자식 안정기의 설계)

  • Park, Chong-Yun;Choe, Wang-Seop
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.9
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    • pp.1-7
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    • 2010
  • Ceramic metal halide lamps have been widely used due to long lifetime, high luminous efficiency and good colour rendering. 35[W] ceramic metal halide lamps has very different characteristics between ignition state and steady state. The developed electronic ballast is satisfied to both ignition state and steady state characteristics by using a micro-controller. The proposed electronic ballast is consists of EMI filter, Full-wave rectifier, Active PFC, DBI(Dual Buck Inverter), Igniter and control circuit. It enables to supply both low-frequency rectangular wave voltage and current to the lamp by using DBI(Dual Bcuk Inverter) structure.

A High Efficiency MHD Lamp Ballast with a Frequency Controlled Synchronous Rectifier (주파수 가변 동기 정류기를 이용한 고효율 MHD 램프 안정기)

  • Hyun B.C.;Lee I.K.;Cho B.H.
    • Proceedings of the KIPE Conference
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    • 2004.11a
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    • pp.71-75
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    • 2004
  • In this paper, in order to develop a simple and high efficient ballast without an external igniter, a half-bridge type ballast with a coupled inductor and a frequency controlled synchronous rectifier is proposed. The internal LC resonance of the buck converter is used In generate a high voltage pulse for the ignition, and the coupled inductor filter is used for steady state ripple cancellation. Also, a synchronous buck converter is applied for the DC/DC converter stage. In order to improve the efficiency of the ballast, a frequency control method is proposed. This scheme reduces a circulation current and turn off loss of the MOSFET switch on the constant power operation, which results in increase of the efficiency of the ballast system about $4\%$, compared to a fixed frequency control. It consists a 2-stage version ballast with a PFC circuit. The results are verified with hardware experiments.

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The Development of Buck Type Electronic Ballast for 250W MHL and Dimming System (250W MHL용 Buck Type 전자식 안정기 및 Dimming 시스템 개발)

  • 박종연;박영길;정동열;김한수
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.1
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    • pp.30-40
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    • 2002
  • This paper studies the electronic ballast development for 250w MH lamps. We have improved the input power factor using a PFC IC. To provide the rating voltage required In the lamps, we have used the buck type dc-dc converter By this method, the stress of switching devices in inverter can be reduced. The inverter is the Full-Bridge type. To eliminate the acoustic resonance phenomena of MH lamps, we have added the high frequency sinewave voltage to the low frequency square-wave voltage to the lamp. We hove developed the igniter circuit using the L, C devices. We could control dimming of the lamp by varying the output voltage of the buck converter. The time of illuminating lamps and luminous intensity could be adjusted by season and time band. The buck converter output voltage can be controlled and the no load and over current situation were Protected by the development of the microprocessor Program.