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RISS 인기검색어
- 검색키워드
- 저자 : Chunyang Gu (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Design of On-line UPS Based on Boost Converter
Chunyang Gu,Zhibing Yang,Chunling Yang,Mengda Yang 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Design and build up a new on-line digital UPS based on boost topological structure with a new kind of single-chip computer, STC12C5412AD, realizing sine wave and square wave output, and shifting among 50Hz, 60 Hz, and 400Hz of the supply for adopting into different industrial standards and applications. Such UPS system contains the module of intelligent charging from storage battery and thorough security functions, characterized by the output of un-interruption and high stability, low distortion, free of interference, low cost and multi-function.
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Chunyang Gu,Harish S. Krishnamoorthy,Prasad N. Enjeti,Zedong Zheng,Yongdong Li 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
A new type of topology with medium-frequency-transformer (MFT) isolation for medium voltage wind power generation systems is proposed in this paper. This type of converter is a high density power conversion system, with high performance features suitable for next generation wind power systems in either on-shore or off-shore applications. The proposed topology employs single-phase cascaded multi-level AC-AC converters on the grid side and three phase matrix converters on the generator side, which are interfaced by medium frequency transformers. This avoids DC-Link electrolytic capacitors and/or resonant L-C components in the power flow path thereby improving the power density and system reliability. Several configurations are given to fit different applications. The modulation and control strategy has been detailed. As two important part of the whole system, a novel single phase AC-AC converter topology with its reliable six-step switching technique and a novel symmetrical 11-segment modulation strategy for two stage matrix converter (TSMC) is proposed at the special situation of medium frequency chopping. The validity of the proposed concept has been verified by simulation results and experiment waveforms from a scaled down laboratory prototype.
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Gu, Chunyang,Krishnamoorthy, Harish S.,Enjeti, Prasad N.,Zheng, Zedong,Li, Yongdong The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
A new type of topology with medium-frequency-transformer (MFT) isolation for medium voltage wind power generation systems is proposed in this paper. This type of converter is a high density power conversion system, with high performance features suitable for next generation wind power systems in either on-shore or off-shore applications. The proposed topology employs single-phase cascaded multi-level AC-AC converters on the grid side and three phase matrix converters on the generator side, which are interfaced by medium frequency transformers. This avoids DC-Link electrolytic capacitors and/or resonant L-C components in the power flow path thereby improving the power density and system reliability. Several configurations are given to fit different applications. The modulation and control strategy has been detailed. As two important part of the whole system, a novel single phase AC-AC converter topology with its reliable six-step switching technique and a novel symmetrical 11-segment modulation strategy for two stage matrix converter (TSMC) is proposed at the special situation of medium frequency chopping. The validity of the proposed concept has been verified by simulation results and experiment waveforms from a scaled down laboratory prototype.
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A Study on the Psychology of College Students Suicide
WANG, Chen(왕첸),GU, Chunyang(구춘양),HEO, Gyun(허균) 동북아시아문화학회 2023 동북아시아문화학회 국제학술대회 발표자료집 Vol.2023 No.10
The psychological problem of college students suicide is getting more and more serious, and many scholars pay attention to it. Psychological problems are becoming more common among college students, and many people feel at a loss when faced with various pressures and challenges. Therefore, the in-depth study of college students psychology will not only help solve the existing problems, but also provide a better development direction for the future. In this paper, a preliminary study of suicide psychology was carried out in 36 college students.Through the design of questionnaires and research, the psychological status and needs of the 36 college students were investigated. In this paper, a preliminary study of suicide psychology was carried out in 36 college students.Through the design of questionnaires and research, the psychological status and needs of the 36 college students were investigated. Psychological research of university students is a complicated but very important field. In the future, we can better understand the needs and problems of college students through in-depth study of their psychology, and provide more precise psychological services and intervention programs for the future.
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