새로운 고효율 소프트 스위칭 3상 PWM 정류기

문상필,서기영,이현우,권순걸,Mun Sang-Pil,Suh Ki-Young,Lee Hyun-Woo,Kwon Soon-Kurl 대한전자공학회 2005 電子工學會論文誌-SC (System and control) Vol.42 No.2

새롭게 개발되어진 소프트 스위칭 3상 PM 정류기는 간단한 회로 구성과 고효율을 가지고 있다. 제안한 회로는 ARCP 컨버터의 한 종류이다. 기존의 ARCP 컨버터는 3상 보조 리액터와 소프트 스위칭 보조 회로를 6개의 보조 스위치, 각 스위치의 게이트 구동 회로, 제어회로가 필수적이나 결과적으로 이 회로는 높은 손실을 가지고 있다. 본 논문에서 제안한 주 회로는 두 개의 보조 리액터와 두 개의 스위치와 각각의 다이오드로 구성되는 보조 소프트 스위칭 회로이다. 부가적으로 두 개의 주 스위치와 간단한 보조 스위치의 제어회로는 PWM 제어 회로로 만들어지며, 공통으로 사용하였다. 소프트 스위칭 보조 회로의 작용을 의미하며, 주 스위치는 WS로 동작되고, 보조스위치는 ZCS로 동작된다. 본 논문에서 제안한 회로의 구성과 동작 원리를 설명하였으며, 실험결과에 의해서 증명하였다 용랑5[kW]의 시작품을 사용하여 변환효율은 최대$98.8[\%]$과 역률$99[\%]$를 얻었다. A new soft switching three-phase PWM rectifier with simple circuit configuration and high efficiency has been developed. The proposed circuit is a kind of the auxiliary resonant commutated Pole(ARCP)converter The conventional ARCP converter requires three-auxiliary reactors and six-auxiliary switches for the soft switching auxiliary circuit and for these switching elements, a gate drive circuit and a control circuit are required, resulting in high part as a disadvantage. In the main circuit proposed in this paper, the auxiliary soft switching circuit is composed of two-auxiliary reactors, two-auxiliary switches and several diodes. In addition, common use of the PWM control circuit for two-switches will make the control circuit of the auxiliary switches simple. By means of function of the soft switching auxiliary circuit, the main switching element performs zero voltage switching operation and the auxiliary switches perform the zero current switching. In this paper, the circuit configuration and the operational analysis of the proposed circuit are described at first and then, experimental results will be reported. By using a prototype with 5[kW] capacity, the conversion efficiency of maximum $98.8[\%]$ and the power factor of $99[\%]$ or higher were obtained.

에어컨 전력변환장치의 고조파 개선에 관한 연구

문상필,서기영,이현우,정상화,Mun, Sang-Pil,Suh, Ki-Young,Lee, Hyun-Woo,Jung, Sang-Hwa 대한전자공학회 2002 電子工學會論文誌-SC (System and control) Vol.39 No.5

To improve the current waveform of diode rectifiers, we propose a new operating principle for the voltage -doubler diode rectifiers. In the conventional voltage-doubler rectifier circuit, relatively large capacitors are used to boost the output voltage, while the proposed circuit uses smaller ones and a small reactor not to boost the output voltage but improve the input current waveform. A high input power factor of 97[%] and an efficiency of 98[%] are also obtained. The harmonic guide lines of proposed rectifier is no interfered with inverter switching, resulting in a simple, reliable and low-cost ac-to dc converters in comparison with the boost-type current-improving circuits.It compared conventional pulse-widthmodulated(PWM)inverter with half pulse-widthmodulated (HPWM) inverter. Proposed HPWM inverter eliminated dead-time by lowering switchingloss and holding over-shooting. 다이오드 정류회로의 전류 파형을 향상시키기 위해서 배전압 다이오드 정류회로에 대한 새로운 동작원리를 제안하였다. 기존의 배전압 정류회로는 대용량 캐패시터를 이용하여 출력전압을 높였으나 제안한 회로는 소용량의 캐패시터와 리액터를 이용하기 때문에 출력전압은 높아지지 않지만 입력전류의 파형을 개선할 수 있다. 그리고 역률과 효율이 각각 97[%], 98[%]을 얻을 수 있다. 제안한 정류기는 고조파 규제값과 스위치가 서로 영향을 미치지 않고 다이오드와 인덕터 그리고 콘덴서로 구성된 비선형 임피턴스 회로이다. 또한 일반적인 펄스 폭 변조 인버터와 하프 펄스 폭 변조 인버터를 비교하여 설명하였으며 제안된 하프 펄스 폭 변조 인버터에 의해서 낮은 스위칭 손실과 오버슈팅을 제어할 수 있다.

상용주파의 LC공진회로를 이용한 입력전류파형 개선

문상필,김칠용,권순걸,서기영,Mun, Sang-Pil,Kim, Chil-Ryong,Kwon, Soon-Kurl,Suh, Ki-Young 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.5

본 논문에서는 일반적으로 사용되어지는 배전압 단상 정류회로에 LC 공진회로를 첨가하여, 고조파의 성분을 저감시키는 고역률 단상 정류회로를 제안하였다. 제안한 회로는 다이오드 브리지에 병렬로 커패시터를 접속하고, 입력에 인덕터L을 추가하여 접속시키므로써 상용주파수에서 LC 공진현상을 이용하여, 수동소자만으로 입력전류를 정현파화한다. 그리고 고조파 제어 규제값의 여유도 만족시킨다. 이 모든 사항에 대해 실험과 시뮬레이션 결과를 비교, 분석을 통하여 그 타당성을 확인하였다. We propose a power factor correction scheme using a LC resonant circuit in commercial frequency without switching devices. In this method, It makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency, Hence, the harmonic characteristics can be significantly improved, where the lower order harmonics, such as the fifth and seventh orders are much reduced. The result are confirmed by the theoretical and experimental implementations

입력전류 파형 개선형 단상 정류기의 토폴로지

이상현(Sang-Hyun Lee),박진민(Jin-Min Park),문상필(Sang-Pil Mun),서기영(Ki-Young Suh) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-

For small capacity rectifier circuits such as these for consumer electronics and appliances, capacitor input type rectifier circuits are generally used. Consequently, various harmonics generated within the power system become a serious problem. Various studies of this effect have been presented previously. However, most of these employ switching devices, such as FETs and the like. The absence of switching devices makes systems more tolerant to over-load, and brings low radio noise benefits. We propose a power factor correction scheme using a LC resonant in commercial frequency without switching devices. In this method, it makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency, Hence the harmonic characteristics can be significantly improved, where the lower order harmonics, such as the fifth and seventh order are much reduced. The result are confirmed by the theoretical and experiment implementations.

유도가열용 ZCS PWM SEPP 고주파 인버터의 특성

문상필(Sang-Pil Mun),김칠용(Chil-Ryong. Kim),곽동걸(Dong-Kurl Kwak),김춘삼(Choon-Sam Kim),Mutsuo Nakaoka 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-

This research presented the new zero-current switching pulse width modulation SEPP(Single Ended Push-Pull)highfrequency inverter for solving the problem of the zero-current SEPP high frequency inverter circuit which is using widely in the practical application of an induction heating apparatus, the soft switching operation and power control are impossible when the lowest power supply in the zero-current switching pulse width modulation SEPP high frequency inverter. The inverter circuit which is attempted by on-off operation of a switch has the reduction effect of the power loss due to a soft switching and a high frequency switching. And it confirmed that the power regulation is possible continuously from 0.25[㎾] until 2.84[㎾] in the case the duty rate(D) changes from 0.08 to 0.3 under zero-current switching operating by a dissymmetry pulse width modulating control and the power conversion efficiency comes true the efficiency of 95[%]. Due to the result above, the ZCS PWM SEPP high frequency inverter will be effective as sources of an induction heating apparatus.

자동차용 AC 전원시스템에 적용되는 인터리브 고주파 절연형 소프트 스위칭 DC-DC 컨버터 시스템

문상필(Sang-Pil Mun),김영문(Young-Mun Kim) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.10

무손실 스너버회로를 이용한 새로운 소프트 스위칭 AC-DC승압형 컨버터

문상필(Sang-Pil Mun),서기영(Ki-Young Suh),김영문(Young-Mun Kim) 대한전기학회 2004 대한전기학회 학술대회 논문집 Vol.2004 No.7

승압 초퍼 기능이 내장된 새로운 태양광 발전용 파워컨디셔너의 개발

문상필(Sang-Pil Mun),이수행(Su-Haeng Lee),김영문(Young-Mun Kim) 대한전기학회 2014 전기학회논문지 P Vol.63 No.4

This paper is related to a new solar power conditioner for a built-in step-up chopper function. In the first step-up chopper proposed solar PV power conditioner for mutually connected in series with the input voltage of the bypass diodes are respectively connected to the positive terminal should install the mutual boosting chopper diode connected in series with the boost chopper switching element between the two power supply and at the same time the first and the second was connected to a second diode and a resonance inductor and a snubber capacitor in series with each other. And the common connection point between the bypass diode and the step-up chopper and the step-up chopper diode common connection point of the switching elements of the input voltage was set to the boost inductor for storing energy. In addition, between the step-up chopper and the step-up chopper diode and a switching element of a joint connection point of the first auxiliary diode and the second common connection point of the auxiliary diode was provided, the resonance capacitor. Between the step-up chopper and the step-up chopper diode and a switching element of a joint connection point and the common connection point of the resonance inductor snubber capacitor and connecting the third secondary diode, between two power supply lines is characterized by configuring the DC link capacitor bus lines in parallel. Therefore, it is possible to suppress the switching loss through, DC link bus lines, as well as there could seek miniaturization and weight reduction of the power conditioner itself by using a common capacitor of the non-polar non-polar electrolytic capacitor having a capacitor, the service life of the circuit can be extended and it is possible to greatly reduce the loss can be greatly improve the reliability of the product and the operation of the product itself.

에어컨 전원장치의 고조파 저감

문상필(Sang-Pil Mun),서기영(Ki-Young Suh),이현우(Hyun-Woo Lee),김영문(Young-Mun Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-

This paper proposes a nonlinear impedance circuit composed by diodes and inductors or capacitors. This circuit needs no control circuit and switches, and the impedance value is changed by the polarity of current or voltage. and this paper resents one of these applications to improve the input current of capacitor input diode rectifiers. The rectifier using the nonlinear impedance circuit id constructed with four diodes and four capacitors in addition to the conventional rectifiers, that is, it has eight diodes and five capacitors, including a DC link capacitor. It makes harmonic components of the input current reduce and the power factor improve. A circuit design method is shown by experimentation and confirmed simulation. It explained that compared conventional pulse width modulated(PWM) inverter with half pulse-width modulated (HPWM) inverter. Proposed HPWM inverter eliminated dead-time by lowering switching loss and holding over-shooting.<br/> <br/>

역률 개선회로를 갖는 배전반용 에어컨 시스템

문상필(Sang-Pil Mun),서기영(Ki-Young Suh),이현우(Hyun Woo Lee),권순걸(Soon-Kurl Kwon),김영문(Young-Mun Kim) 대한전자공학회 2001 대한전자공학회 학술대회 Vol.2001 No.6