• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.360-362
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• 2008

In this paper, an improved full bridge inverter is presented to get multiple output for UV lamp and barrier discharge. It has a structure of two equivalent half bridge inverters and one full bridge inverter. The outputs of the proposed circuit can be controlled using frequency and PWM independently. To verify the proposed circuit, theoretical analysis and experimental results has been done using a prototype power supply.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.529-534
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• 1998

In this paper, control strategies of the bridge-type ZVT inverter for AC motor drive application were discussed. The topology of the ZVT inverter is analyzed with a description of the control conditions based on the load current. And a new resonant control algorithm by using load current feedback and modified SVM algorithm for the proposed ZVT inverter is proposed in order to achieve the ZVT switching condition in full control range. The detailed computer simulation and experimental results represent that ZVT and ZCT operation for the main and auxiliary switch, respectively, was achieved.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 A
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• pp.492-494
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• 1996

This paper describes a study on the series resonant inverter using the double full-bridge, and the output voltage of the proposed inverter is controlled by phase shift angle of the outputs of two inverters. These control schemes can be reduce the switching loss and EMI, etc, which the inverter is drived by auto following control of output frequency, because it is impossible for switching devices to be always turned on and off at zero voltage or zero current. Theoretical characteristics of the proposed double inverter circuit are compared with Pspice simulation and experimental results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(1)
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• pp.23-26
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• 2003

This paper presents a novel hybrid type multilevel inverter in order to improve the waveshape of output voltage. The proposed multilevel inverter is consist of two full-bridge modules for level creation and one full-bridge module for PWM operation. The generated levels are total 11-level: 9-level by the level inverter and 2-level by the PWM inverter. The operational principles and analysis are explained and validity of the proposed system is verified through the experimental results using a prototype.

• 전력전자학회논문지
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• 제14권4호
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• pp.307-314
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• 2009

본 논문에서는 풀-브리지 인버터의 앞단에 DC 전압원과 스위치를 추가하여 다단의 출력전압을 형성시킬 수 있는 멀티레벨 인버터를 제안한다. 제안된 회로에서 풀-브리지 인버터는 출력전압의 극성을 결정하게 되고 추가된 스위치의 동작에 의해 출력전안의 레벨 수를 정의할 수 있다. 제안된 방식은 동일 레벨의 출력전압을 형성시키는 경우 기존 멀티레벨 인버터에 비해 스위치 소자수를 저감 시킬 수 있는 장점을 가진다. 제안된 인버터의 타당성 검증을 위해 시뮬레이션 및 시작품을 이용한 실험 결과를 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 정기총회 및 학술대회 전문대학교육위원
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• pp.77-78
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• 2008

Recently, a fuel cell is remarkable for new generation system. The fuel cell generation system converts the chemical energy of a fuel directly into electrical energy. The fuel cell generation is characterized by low voltage and high current. For connecting to utility, it needs both a step up converter and an inverter. The step up converter makes DC link and the inverter changes DC to AC. In this paper, full bridge converter and the single phase inverter are designed and installed for fuel cell. Simulation and experiment verify that fuel cell generation system could be applied for the distributed generation. In this paper, the 1.5kW active clamp current-fed full bridge converter employing MOSFETs is operated to discharge the battery whereas a voltage-fed half bridge converter employing IGBTs is operated to charge the battery.

• 전력전자학회논문지
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• 제18권6호
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• pp.515-522
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• 2013

In this paper, a new PCS is proposed which is consisted of high boost dual converter and single phase half-bridge inverter. The proposed PCS is configured in parallel input / serial output, using two interleaved voltage doubler converter. Converter of the proposed PCS is distribute input current by configuring parallel input and reduced turn ratio of transformer by configuring serial output. Also, compositions of the inverter are composed of serial output capacitor of converter and half-bridge inverter. The dual converter and single phase half-bridge inverter is designed and characteristic of the new PCS is analysed. The system of the 1.5[kW] PCS is verified through an experimental about operation and stability.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2000년도 전력전자학술대회 논문집
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• pp.78-81
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• 2000

The backlight inverter used in a laptop computer is investigated in this paper. It has been difficult for the electromagnetic transformer in the inverter to have a high efficiency and compact profile. In this study the piezoelectric transformer(PT) is used to reduce the loss and volume compared to the standard electromagnetic transformer. Comparison with the experimental inverter with the PT has been shown to validated the simulation program using the equivalent circuit model of the PT. A simple dimming control circuit was experimentally demonstrated and shown to have broad control.

• 조명전기설비학회논문지
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• 제24권6호
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• pp.8-17
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• 2010

본 논문에서는 위상천이 풀브리지 인버터를 이용한 새로운 LCD CCFL 백라이트 전자식 안정기를 제안한다. 제안한 전자식 안정기는 소프트스타팅이 적용된 새로운 형태의 디지털 디밍제어를 이용하여 CCFL의 점화전압을 감소시키고 전류스파이크를 제거함으로써, CCFL의 점화 특성을 향상 시키며 나아가 CCFL의 수명을 연장시킨다. 이를 위하여 본 논문은 제안한 전자식 안정기의 풀브리지 인버터 토폴로지를 간략하게 분석하고 여기에 적용된 새로운 디지털 디밍제어 알고리즘을 간단하게 설명한다. 그리고 본 논문은 프로토타입 회로의 설계예를 보이고 단일칩 마이크로컨트롤러 상에 소프트웨어적으로 구현되는 디지털 디밍제어의 구현 방식을 설명한다. 이것은 실제 프로토타입 전자식 안정기로 구현되었으며, 그 실험 결과를 통하여 제안한 전자식 안정기가 정확하게 동작함을 보였다. 제안한 전자식 안정기 프로토타입의 디지털 디밍제어 동작 시의 점화전압은 기존의 전자식 안정기와 비교하여 약 30[%] 정도 감소되었으며 어떠한 전류스파이크도 나타나지 않았다.

• Journal of Electrical Engineering and Technology
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• 제13권1호
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• pp.345-351
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• 2018

This paper analyzes a resonant inverter to generate plasma. The resonant inverter consists of a full bridge converter, resonant network and reactor to generate a magnetic field for plasma generation. A plasma load has very distinct characteristics compared to conventional loads. The characteristics of plasma load are analyzed through experimental results. This paper presents the study on the resonant network, which was performed in order to determine how to achieve a constant current gain. Another important contribution of this study is the analysis of drop-out phenomenon observed in plasma loads which is responsible for unpredictable shutdown of the plasma generator that requires stable operation. In addition, the design process for the resonant network of a plasma generator is proposed. The validity of this study is verified through simulations and experimental results.