• 제목/요약/키워드: Resonant Zero voltage switching

검색결과 358건 처리시간 0.021초

Analysis and Design of a Bidirectional Cycloconverter-Type High Frequency Link Inverter with Natural Commutated Phase Angle Control

  • Salam, Zainal;Lim, Nge Chee;Ayo, Shahrin Md.
    • Journal of Power Electronics
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    • 제11권5호
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    • pp.677-687
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    • 2011
  • In this paper a cycloconverter-type high frequency transformer link inverter with a reduced switch count is analyzed and designed. The proposed topology consists of an H-bridge inverter at the transformer's primary side and a cycloconverter with three bidirectional switches at the secondary. All of the switches of the cycloconverter operate in non-resonant zero voltage and zero current switching modes. To overcome a high voltage surge problem resulting from the transformer leakage inductance, phase angle control based on natural commutation is employed. The effectiveness of the proposed inverter is verified by constructing s 750W prototype. Experimentally, the inverter is able to supply a near sinusoidal output voltage with a total harmonic distortion of less than 1%. For comparison, a PSpice simulation of the inverter is also carried out. It was found that the experimental results are in very close agreement with the simulation.

Electronic Ballast Using a Symmetrical Half-bridge Inverter Operating at Unity-Power-factor and High Efficiency

  • Suryawanshi Hiralal M.;Borghate Vijay B.;Ramteke Manojkumar R.;Thakre Krishna L.
    • Journal of Power Electronics
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    • 제6권4호
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    • pp.330-339
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    • 2006
  • This paper deals with novel electronic ballast based on single-stage power processing topology using a symmetrical half-bridge inverter and current injection circuit. The half-bridge inverter drives the output parallel resonant circuit and injects current through the power factor correction (PFC) circuit. Because of high frequency current injection and high frequency modulated voltage, the proposed circuit maintains the unity power factor (UPF) with low THD even under wide variation in ac input voltage. This circuit needs minimum and lower sized components to achieve the UPF and high efficiency. This leads to an increase in reliability of ballast at low cost. Furthermore, to reduce cost, the electronic ballast is designed for two series-connected fluorescent lamps (FL). The analysis and experimental results are presented for ($2{\times}36$ Watt) fluorescent lamps operating at 50 kHz switching frequency and input line voltage (230 V, 50 Hz).

고역률 단일 전력단 고주파 공진 AC-DC 컨버터의 특성해석 (A Characteristic Analysis of Single-Power-Stage High Frequency Resonant AC-DC Converter with High Power Factor)

  • 남승식;원재선;황계호;오경섭;박재욱;김동희;오승훈
    • 전력전자학회논문지
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    • 제9권4호
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    • pp.372-380
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    • 2004
  • 본 논문은 기존의 2개의 전력 처리단을 갖는 컨버터를 단일 전력단으로 구성하고, ZVS기법을 이용한 고역률 단일전력단 고주파 공진 AC-DC 컨버터를 제안하고 있다. 입력단에 승압형 역률개선 인덕터를 연결하여 일정 듀티비와 가변 스위칭 주파수로 입력전류를 불연속 모드로 제어함으로써 입력 역률을 개선하는 것이 가능하였다. 종래의 2개 전력 처리단을 가지는 컨버터의 경우 역률 제어용 스위치가 별도로 필요하지만 전력 처리단을 하나로 단일화 시키므로써 컨버터의 구성이 간략화 되어져, 비용의 저감과 신뢰성을 증가시킬 수 있는 등의 장점이 있다. 본 연구는 고역률 단일전력단 AC-DC 컨버터의 동작원리와 무차원화 파라미터를 이용한 특성평가를 범용성 있게 행하여, 특성평가에서 산출한 특성값을 기초로 하여 실험장치를 제작하였으며, 실험치와 이론치를 비교ㆍ검토하여 제안 회로의 특성해석의 정당성을 입증하고 있다.

Analysis of a New Parallel Three-Level Zero-Voltage Switching DC Converter

  • Lin, Bor-Ren;Chen, Jeng-Yu
    • Journal of Electrical Engineering and Technology
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    • 제10권1호
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    • pp.128-137
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    • 2015
  • A novel parallel three-level zero voltage switching (ZVS) DC converter is presented for medium voltage applications. The proposed converter includes three sub-circuits connected in parallel with the same power switches to share load current and reduce the current stress of passive components at the output side. Thus, the size of the output chokes is reduced and the switch counts in the proposed converter are less that in the conventional parallel three-level DC/DC converter. Each sub-circuit combines one half-bridge converter and one three-level converter. The transformer secondary windings of these two converters are connected in series in order to reduce the size of output inductor. Due to the three-level circuit topology, the voltage stress of power switches is equal to $V_{in}/2$. Based on the resonant behavior by the output capacitance of power switches and the leakage inductance (or external inductance) at the transition interval, each switch can be turned on under ZVS. Finally, experiments based on a 2 kW prototype are provided to verify the performance of the proposed converter.

Design of Capacitive Power Transfer Using a Class-E Resonant Inverter

  • Yusop, Yusmarnita;Saat, Shakir;Nguang, Sing Kiong;Husin, Huzaimah;Ghani, Zamre
    • Journal of Power Electronics
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    • 제16권5호
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    • pp.1678-1688
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    • 2016
  • This paper presents a capacitive power transfer (CPT) system using a Class-E resonant inverter. A Class-E resonant inverter is chosen because of its ability to perform DC-to-AC inversion efficiently while significantly reducing switching losses. The proposed CPT system consists of an efficient Class-E resonant inverter and capacitive coupling formed by two flat rectangular transmitter and receiver plates. To understand CPT behavior, we study the effects of various coupling distances on output power performance. The proposed design is verified through lab experiments with a nominal operating frequency of 1 MHz and 0.25 mm coupling gap. An efficiency of 96.3% is achieved. A simple frequency tracking unit is also proposed to tune the operating frequency in response to changes in the coupling gap. With this resonant frequency tracking unit, the efficiency of the proposed CPT system can be maintained within 96.3%-91% for the coupling gap range of 0.25-2 mm.

새로운 ZVS 소프트 스위칭 H-Bridge 인버터 (A Novel ZVS Soft-Switching H-Bridge inverter)

  • 최광수;정두용;김재형;이수원;원충연;정용채
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 추계학술대회 논문집
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    • pp.130-132
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    • 2008
  • In this paper, we have proposed a novel zero-voltage-switching (ZVS) soft-switching H-bridge inverter. Because the conventional H-Bridge inverter generates switching losses at turn on and off, the efficiency is reduced. The proposed inverter operates ZVS switching using an auxiliary switch and resonant circuit to improve the efficiency. in the DC-DC converter stage, it can reduce not only switching loss but also capacity and size of passive devices due to the resonant elements. DC-AC inverter stage supplies load with energy through the ZVS operation of 4 switches. A detail mode analysis of operating is in presented. We have presented the inverter topology, principle of operation and simulation results obtained from the PSIM simulator.

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임펄스 Generator용 고주파 고압 전원장치 개발 (The Evolution of High Frequency and High Voltage Source Equipment for Impulse Generator)

  • 신병철;송두익;정창용;유동욱
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.573-576
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    • 1999
  • 본 논문은 다양한 분야에 적용이 가능한 고압 직류 전원장치를 개발에 관한 것이다. 개발된 이 장치는 soft switching 기술을 이용하여 인버터의 전력소자가 switching 때문에 발생하는 손실과 EMI를 감소시키기 위하여 영전압 스위칭(ZVS; Zero Voltage Switching) 방식을 채택하였다. 이러한 고주파 인버터의 구동방식을 단일 Chip 제어기로 쉽게 구현할 수 있는 영전압 스위칭 위상전이 제어 직렬 공진형(ZVS PSC-SRI; ZVS Phase Shifted Control Series Resonant Inverter)으로 선택하여 제어기의 신뢰도를 높였고 장치의 고효율화(90%이상) 확보와 장치의 소형화뿐만 아니라 실용화를 위한 저가격화를 절충할 수 있는 방법을 중점적으로 연구하였다. 본 논문에서 고주파 고압 직류 전원 장치의 구성 및 설계, ZVS PSC-SR 인버터의 설계 그리고 고주파 고압 변압기의 설계에 관한 내용을 자세히 설명하고 제작된 고주파 고압 전원장치의 실험결과 및 고찰을 기술한다.

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새로운 소프트 스위칭형 DC-DC 컨버터의 해석 (Analysis of Novel Soft Switching DC-DC Converter)

  • 곽동걸;서기영;권순걸;이수흠;이현우
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 추계학술대회 논문집 학회본부
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    • pp.144-146
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    • 1994
  • In this paper, the authors propose a so-called new soft switching circuit topology. The resonant circuit in new converter implements zero-current and zen-voltage for power switches without increasing voltage/current stresses. The proposed converter are deemed most suitable for high-power applications where the power switching devices are used. Some simulative results on computer are included to confirm the validity of the analytical results.

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새로운 무손실 스너버 커패시터를 이용한 고효율 스텝 업 AC-DC 초퍼에 관한 연구 (A Study on Novel Step-Up AC-DC Chopper of High Efficiency by using Lossless Snubber Capacitor)

  • 곽동걸;김상훈
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2008년도 하계종합학술대회
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    • pp.1103-1104
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    • 2008
  • In this paper, authors propose a novel step-up AC-DC chopper operated with power factor correction (PFC) and with high efficiency. The proposed chopper behaves with discontinuous current control (DCC) of input current. The input current waveform in the proposed chopper is got to be a discontinuous sinusoid form in proportion to magnitude of ac input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity and the control method is simple. In the general DCC chopper, the switching devices are turned-on with the zero current switching, but turn-off of the switching devices is switched at current maximum value. To achieve a soft switching of the switching turn-off, the proposed chopper is used a new partial resonant circuit. The result is that the switching loss is very low and the efficiency of chopper is high.

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동기 정류기를 이용한 위상 변위 제어 클램프 모드 포워드 다중 공진형 컨버터 (Phase Shift Controlled GM ZVS-MRC with Synchronous Rectifier)

  • 송종화;김창선;김희준
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 하계학술대회 논문집 F
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    • pp.2016-2019
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    • 1997
  • To solve the low efficiency problem of low-voltage power supplies, it has been studied to replace the schottky barrier diode with the MOSFET synchronous rectifier. In this paper, Phase Shift-Controlled Clamp Mode Zero Voltage Switching-Multi Resonant Converter with Synchronous Rectifier (PSC CM ZVS-MRC with SR) is presented to achieve high efficiency in low-voltage power supplies. The characteristics analysis of synchronous rectifier is established by using the MOSFET equivalent circuit and efficiency comparison is established between the Synchronous Rectifier and the schottky barrier diode. To verify the validity of the analysis, 33W(3.3V, 10A) PSC CM ZVS-MRC with self-driven synchronous rectifier at switching frequency of 1MHz is designed and tested. And it is confirmed that the experimental results are well consistent with the theoretical results. The maximum efficiency of the converter is 83.4% at full load, which is 3.3% higher than conventional schottky diode rectification.

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