http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Vassilios G. Agelidis (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Steady-State Harmonic Domain Matrix-Based Modeling of Four-Quadrant EMU Line Converter
Wang, Hui,Wu, Mingli,Agelidis, Vassilios G.,Song, Kejian The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.3
As a non-linear time variant system, the four-quadrant line converter of an electric multiple unit (EMU) was expressed by linear time periodic functions near an operating point and modeled by a steady-state harmonic domain matrix. The components were then combined according to the circuit connection and relations of the feedback control loops to form a complete converter model. The proposed modeling method allows the study of the amplitude of harmonic impedances to explore harmonic coupling. Moreover, the proposed method helps provide a better design for the converter controllers, as well as solves the problem in coordination operation between the EMUs and the AC supply. On-site data from an actual $CRH_2$ high-speed train were used to validate the modeling principles presented in the paper.
-
Steady-State Harmonic Domain Matrix-Based Modeling of Four-Quadrant EMU Line Converter
Hui Wang,Mingli Wu,Vassilios G. Agelidis,Kejian Song 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.3
As a non-linear time variant system, the four-quadrant line converter of an electric multiple unit (EMU) was expressed by linear time periodic functions near an operating point and modeled by a steady-state harmonic domain matrix. The components were then combined according to the circuit connection and relations of the feedback control loops to form a complete converter model. The proposed modeling method allows the study of the amplitude of harmonic impedances to explore harmonic coupling. Moreover, the proposed method helps provide a better design for the converter controllers, as well as solves the problem in coordination operation between the EMUs and the AC supply. On-site data from an actual CRH2 high-speed train were used to validate the modeling principles presented in the paper.
-
1-MHz Isolated Bipolar Half-bridge GaN gate driver for SiC MOSFETs
Taekyun Kim,Minsoo Jang,Vassilios G. Agelidis 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
In this paper, 1-MHz isolated bipolar halfbridge SiC MOSFET gate drivers using GaN semiconductors are proposed. To realise the 1 MHz switching capability of the gate driver for SiC MOSFET, the half-bridge topology is used in conjunction with Digital Isolators. The design of the gate drivers takes into consideration the capability of driving SiC MOSFET at 1 MHz switching with less driving power loss and propagation delay. The proposed gate driver is designed and experimentally validated to drive SiC MOSFET at 1 MHz in the 1 kW boost converter. Satisfactory operation of the SiC gate drivers without significant self-heating and with less propagation delay at 1 MHz demonstrates their suitability for high-frequency, high-power applications.
-
Operation of a Modular Multilevel Converter with Selective Harmonic Elimination PWM
Georgios S. Konstantinou,Mihai Ciobotaru,Vassilios G. Agelidis 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
The modular multilevel converter (MMC) is based on the cascaded interconnection of half-bridge switching sub-modules and features modular characteristics that allow its expandability while providing high quality voltage and current output waveforms and removing the need for filtering. The switching frequency of each of the individual converter sub modules being maintained low and the balancing of the capacitor voltages are important requirements for the operation of the converter. Two different modulation approaches of the converter are discussed. Selected simulation and experimental results taken from a low-power laboratory prototype are presented.
-
Application of Valley-Current-Mode Control in High Step-up Converters
Dylan D. C. Lu,Grace M. L. Chu,Vassilios G. Agelidis 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper presents the application of valley-current-mode (VCM) control in a dc-dc converter with high voltage conversion ratio. In contrast with the conventional peak current mode (PCM) control, VCM control programs the valley of the inductor current and is inherently stable during operation under a duty cycle greater than 50 % without slope compensation. VCM control also results in a larger load-and-line regulation range than PCM control. In this paper, the operation of the VCM is revisited and its small-signal characteristics are analyzed. With the use of a high step-up flyback converter as an example, the performance of VCM control in controlling a high step-up converter is evaluated and compared with that of PCM control. Practical implementation and experimental results taken from a 60 W VCM-controlled flyback converter prototype are also presented to confirm the effectiveness of the VCM control in controlling high step-up dc-dc converters.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
