• Title/Summary/Keyword: High frequency resonance type inverter

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The Development of the Buck Type Electronic Dimming Ballast for 250W MHL

  • Jung, Dong-Youl;Park, Chong-Yeon
    • Journal of Electrical Engineering and Technology
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    • v.1 no.4
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    • pp.496-502
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    • 2006
  • In this paper, we studied the development of the electronic ballast for 250W MH (Metal-Halide) lamps. We were able to improve the input power factor by using a PFC IC. To provide the lamp with the rated voltage required, we used the buck-type dc-dc converter. The stress of the switching devices in the inverter could be reduced by this method. To eliminate the acoustic resonance phenomena of MH lamps, the voltage of the lamp added the high frequency sine-wave to the low frequency square-wave by using the full bridge typed inverter. We have developed a simple igniter using the L and C elements. We could control the dimness of the lamp by varying the output voltage of the buck converter. The buck converter output voltage could be controlled by using a microprocessor.

A High Voltage Power Supply for X-Ray Tube Using High Frequency (고주파 인버터식 X-선관용 고전압 전원장치)

  • Kim, H.S.;Yoo, D.W.;Cho, J.G.;Back, J.W.;Rim, G.H.;Won, C.Y.
    • Proceedings of the KIEE Conference
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    • 1997.07f
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    • pp.2246-2248
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    • 1997
  • This paper presents a high-frequency inverter type high-voltage power supply for X-ray equipments. The high-voltage generator consist of an inverter unit including the SR(Series Resonance) type PSC(Phase-Shifted Control) PWM circuit adopting IGBT as the switching power device and high-voltage unit including the CW(Cockcroft Walton) circuit. When the X-ray equipment is radiographing at large power for a short time, this generator operates through feedback voltage mode control to obtain a high speed leading edge and low ripple. The operating modes and design consideration of the proposed power supply are given. Issues in the design of high-voltage divider for high voltage measuring. Experimental results are presented to verify the performance of the designed power supply for varying load conditions. The proposed apparatus has several advantages, e.g., the fast rising time of tube voltage, accuracy and reduced component size etc.

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A Parallel Resonant inverter linked type DC-DC Converter with active-c1amp circuits (능동클램프회로를 갖는 병렬공전 인버터 링크형 DC-DC 컨버터)

  • 오경섭;남승식;김동희;김희대;선우영호
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2003.11a
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    • pp.311-314
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    • 2003
  • In this paper, proposed circuit proposes that Active-Clamp-Circuits basis of a current-fed inverter linked type high frequency resonant dc-dc converter of conventional. and the paper the most of characteristics of the reduced high voltage stress main switches with active clamp circuits and output current constant with the resonant part consists of L, C resonant tank circuit. Also, the capacitor (C$_1$, C$_2$) connected in switches are a common using by resonance capacitor and ZVS capacitor. and circuit analysis used state equation of each part modes. Also we conform a rightfulness theoretical analysis by comparing a parameters values and simulation values obtained from simulation using Power MOS-FET as switching devices.

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Operation Characteristic of Transless type Grid-connected Inverter using Multi-level Switching circuit (멀티레벨 스위칭 회로를 이용한 트렌스리스형 계통 연계 인버터의 동작 특성)

  • Kim, Ju-Yong;No, Kwae-Hyeop;Jung, Tae-Uk
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.916-917
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    • 2008
  • In this paper, Switching damage of switches that is used to proposed power conversion system is reduced by soft switching way. dissipation by part resonance and my resonance stress for resonance of resonance circuit are decreased. Is acted by conversion system high effectiveness. Have following characteristic. Design snubber circuit that is used by switch protection in existent hard work rate Topology by resonant circuit for sogt switching, circuit structure was simple and control system is easy. Also, Can generate free output voltage by multi level Tuesday of output that use individuation Power Cell's Phase Shift PWM, and Low-end switching frequency the harmonic is few.

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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.

A Characteristic Analysis of Instantaneous Resonance Voltage Resultant Type DC-DC Converter (순시 공진 전압 합성형 DC-DC 컨버터의 특성해석)

  • Hwang, Gye-Ho;Oh, Kyeong-Seob;Ro, Chae-Gyun;Nam, Seung-Sik;Min, Byeong-Jae;Kim, Kyeong-Sik
    • Proceedings of the KIEE Conference
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    • 1998.07f
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    • pp.2033-2035
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    • 1998
  • This paper describes a DC-DC converter connected two unites inverters, a half-bridge type of high frequency resonance inverter, at the input with parallel. The proposed paper certified that theorem waveforms are equal to experiment waveforms, in addition, it estimated characteristics such as characteristic of average power, characteristic of average output voltage, characterisic of output voltage ripple etc., for designing the device with normalized parameter value.

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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.

Characteristic of Three-Phase Voltage Type Soft-Switching Inverter using the Novel Active Auxiliary Resonant DC Link Snubber (새로운 액티브 보조 공진 DC 링크 스너버를 이용한 3상 전압형 소프트 스위칭 인버터의 특성)

  • Sung, Chi-Ho;Heo, Young-Hwan;Mun, Sang-Pil;Park, Han-Seok
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.65 no.2
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    • pp.114-121
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    • 2016
  • This paper is Instant space vector PWM(Pulse Width Modulation)power conversion devices in switching power semiconductors from my generation to losses and switching when the voltage surge and current surge of electronic noise(EMI: Electro Magnetic Interference / RFI: Radio Frequency Interference)to effectively minimize the power soft-switching power conversion circuit topologies of auxiliary resonant DC tank for the purpose of high performance realization of the electric power conversion system by the high-speed switching of a semiconductor device(AQRDCT simultaneously : an active auxiliary resonance using auxiliary Quasi-resonant DC tank)DC link snubber switch has adopted a three-phase voltage inverter. AQRDCL proposed in this paper can reduce the effective and current peak stress of the power semiconductors of the auxiliary resonant snubber circuit compared to the conventional active-resonant DC link snubber, it is not necessary to install the clamp switch of the auxiliary resonant DC link, DC the peak current and power loss of the bus line can be reduced.

Development of DC-DC Converter for Arc Welding Machines using A Novel Half Bridge Soft Switching PWM Inverter (새로운 하프 브리지 소프트 스위칭 PWM 인버터를 이용한 용접기용 DC-DC 컨버터의 개발)

  • Kwon, Soon-Kurl;Mun, Sang-Pil
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.45 no.4
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    • pp.60-67
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    • 2008
  • This paper presents a new full-bridge soft switching PWM DC-DC converter circuit topology that adding two switcher, two lossless snubber quasi-resonance capacity, two diode to power source for general welding machine. This half bridge soft switching Is low voltage hight current output that first coil current is smaller than second coil current in high frequency transformer can be obtained with decreasing path loss in conventional DC bus line switcher. As it operate ZCS/ZVS in full range, high frequency, high efficiency and high output are implemented at low voltage and high DC current switching power supplies. All of this items are got from simulation and the result of experiment. If make up for the weak points of this proposed circuit, it will be used more easily for next generation TIG, MIG and MAG type of arc-welding machine.

Development of Arc Welding Machines DC-DC Converter using A Novel Full-Bridge Soft Switching PWM Inverter (새로운 풀-브리지 소프트 스위칭 PWM 인버터를 이용한 용접기용 DC-DC 컨버터의 개발)

  • Kwon, Soon-Kurl;Mun, Sang-Pil
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.6
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    • pp.26-33
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    • 2008
  • This paper presents a new full-bridge soft switching PWM DC-DC converter circuit topology that adding one switcher, one lossless snubber quasi-resonance capacity to power source for general welding machine This full-bridge soft switching DC-DC convoter· topology can applicable 600[V] switching device (IGBT)incase of AC 400[V] common power source because the voltage of active switcher is 1/2 of DC bus line voltage. And low voltage hight current out)ut that first coil current is smaller than second coil current in high frequency transformer can be obtained with decreasing path loss in conventional DC bus line switcher. As it operate ZCS/ZVS in full range, high frequency, high efficiency and high output are implemented at low voltage and high DC current switching power supplies. All of this items are got from simulation and the result of experiment. If make up for the weak points of this proposed circuit, it will be used more easily for next generation TIG, MIG and MAG type of arc-welding machine.