• Journal of Korean Institute of Fire Science & Engineering
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• v.3 no.2
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• pp.39-42
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• 2007

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.488-489
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• 2014

본 논문에서는 Z-소스 인버터 (ZSI)의 임피던스 네트워크 내 인덕터 및 커패시터 등 수동소자 수를 감소시키면서 전압 증폭율을 증가시키기 위하여 1개의 스위칭소자를 더 사용하는 스위치 인덕터 구조를 가지는 회로를 제시한다. 이 제시한 회로에서 암단락시간과 첨가된 스위칭소자의 스위칭을 위한 PWM제어방법을 기술한다. 시뮬레이션을 통하여 제시한 스위치 인덕터-스위치 부스터 ZSI의 동작 및 특성의 타당성을 확인한다.

• Proceedings of the KIPE Conference
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• 2010.11a
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• pp.341-342
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• 2010

본 논문에서는 종전의 3상 H-브리지 PWM 인버터와 다른 토폴로지를 갖는 3상 벅-부스트 DC-AC 인버터를 위한 제어 기법을 제안하였다. 이를 위하여 공간벡터 변조 방식(SVM : Space Vector Modulation) 및 PI 제어기를 벅-부스터 DC-AC 인버터에 적용하고 이를 PSIM 시뮬레이션 통하여 타당성을 검증하였다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1075-1076
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• 2008

이 논문에서는 전류형 MPPT(Maximum Power Point Tracking) 기법을 제안하고 적용하여 태양광 PCS(Power Conditioning System)의 기본적인 제어기를 설계하고 구현하였다. 기본적인 무변압기형 토폴로지에 전류 MPPT를 수행하고 이때에 얻어진 기준전류를 dc/dc 부스트 컨버터를 통해 dc-link에 전압을 충전하여 준다. 이 충전된 파워는 인버터를 통해 계통에 공급되게 된다. 이처럼 크게 MPPT제어, dc/dc컨트롤러, dc-link전류제어, 인버터 전류제어로 나뉘며 본 논문에서는 각 부분의 제어기를 살펴보고 실험을 통해 제어기의 성능을 확인하였다. 실험결과 제안된 전류 MPPT는 원활히 파워를 공급해주었고 dc/dc 부스터 컨버터를 거처 인버터 단까지 파워를 안정적으로 발전하는 것을 확인하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.7
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• pp.74-80
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• 2006

This paper describes a solar energy conversion strategy is applied to grid-connected single phase inverter by the maximum power point of conversion strategy. The maximum power point of tracking is controlled output power of PV(photovoltaic)modules, based on generated circuit control MOSFET switch of two boost converter for a connected single phase inverter with four IGBT's switch in full bridge. The generation control circuit allows each photovoltaic module to operate independently at peak capacity, simply by detecting of the output power of PV module. Furthermore, the generation control circuit attenuates low-frequency ripple voltage. which is caused by the full-bridge inverter, across the photovoltaic modules. The effectiveness of the proposed inverter system is confirmed experimentally and by means of simulation.

• 월간 기계설비
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• s.294
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• pp.128-130
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• 2015

한국의 제조, 공업, 건설시장의 성장에 따라 국내 펌프 수요도 날이 갈수록 늘고 있다. 이에 대한 수요에 대응하여 펌프전문기업인 한일펌프는 창립 50주년을 맞아 에너지 절감형 개별인버터 펌프 신제품인 쿨런트 펌프를 선보였으며, ALL스테인레스 환풍기 및 송풍기 외 양흡입 송풍기 인라인휀 포터블팬 등 다양한 풍력 제품들도 출시했다. 한일전기는 녹 발생이 없는 ALL스테인리스 펌프를 비롯해 현장 수요에 맞춰 필요 부품의 생산부터 조립 테스트 등 부스터 및 산업용 펌프 24시간 제품 출고 시스템을 구축하는 등 차별화된 서비스를 제공하고 있다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.17 no.1
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• pp.1-9
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• 2003

In this paper, prototype of high-power-factor single-stage electronic ballast for fluorescent lamp is designed and implemented. A new low cost single stage high power factor electronic ballast for fluorescent lamps is based on integration of two-boost converter and LC type high frequency resonant inverter. The proposed ballast is combined by simple construction, because full bridge rectifier diode is eliminated and simple control circuit is applied. Boost converter operate in the voltage of positive and negative half cycle respectively at line frequency (60㎐), operation in discontinuous conduction mode performs high power factor. The experimental results show the good performance as PF 0.99, THD 15.4%, and CF 1.65 at output 63.5〔W〕.

• Journal of Convergence for Information Technology
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• v.11 no.3
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• pp.14-19
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• 2021

In this paper, a method of constructing an inverter circuit that can generate negative voltage required to operate an IT device in a stable using an inexpensive buck device is presented. To do this, the problem of constructing the inverter circuit using the existing buck device was examined, the principle that could prevent this problem was analyzed, and a circuit that could solve this problem was presented. In order to prove the effectiveness of the proposed method, the experimental circuit was constructed and the experiment was conducted. Compared to the operation of the inverter circuit by the existing overcurrent prevention circuit, it was confirmed that the stable operation was performed without an overcurrent phenomenon. Accordingly, it is expected that the performance of the circuit can be greatly improved while a number of peripheral devices for configuring the devices for processing various analog signals used in IT devices as a single power supply can be omitted.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2000.11a
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• pp.169-172
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• 2000

This paper describes a Push-Pull type high frequency resonant inverter composed of consolidation of boost converter circuit and resonant inverter circuit. By using a boost converter circuit, the proposed inverter can obtain a twice input voltage of resonant circuit and reduce a secondary turn ratios. also, by using both switching device of boost-converter and resonant circuit, the number of switching device can be reduced by half, the analysis of the proposed circuit was generally described by using normalized parameter and operating characteristics have been evaluated as to switching frequency and parameters. In the future, this proposed inverter shows that is can be practically used as a power source system for the lighting equipment of discharge lamp, induction heating applications.

• Plant Journal
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• v.9 no.2
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• pp.42-45
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• 2013

The worldwide issue of greenhouse gas reduction has recently drawn great attention to carbon capture and storage(CCS). In this study, we developed a 10,000 ton/year pilot injection plant for geological storage of carbon dioxide. Major components of the pilot plant include a pressure pump, a booster pump, and an inline heater to bring liquid carbon dioxide into its supercritical state. The test results show that the pilot plant readily achieves the injection pressure and temperature, showing satisfactory control performance. The overall power consumption is 2,000 ~ 2,500 W, more than 75% of which consumed by the pressure pump. This study will facilitate varied research on greenhouse gas reduction as the only domestically developed system for geological injection.