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作者： Li, H. Ding, H.F. Peng, T. Xiao, H.X. Jiang, C.X. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

At the Wuhan National High Magnetic Field Center, a 135 MW rectifier power supply is being installed nearby a 11 MJ capacitor bank power supply. By combining the two power supplies, a 60 T / 100 ms quasi-continuous magnetic field can be achieved in a monolithic copper coil magnet with a 22 mm diameter bore. Comsol Multiphysics 3.5a and Matlab 7.11.0 were adopted to verify the performance of the magnet and the hybrid power supply system. Details of the designed magnet, the power supply and the simulation results are presented. © 2012 Springer Science+Business Media New York.

关键词： Magnets

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A dual-capacitors type energy recovery power system for repetitive pulsed high magnetic fields

A dual-capacitors type energy recovery power system for repe...

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作者： Xu, Y. Xiang, Y.M. Wan, Q. Yang, R. Xiao, H.X. Ding, H.F. Li, L. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology 430074 Wuhan China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology 430074 Wuhan China

As a flexible and convenient tool, a repetitive pulsed high magnetic field (RPHMF) would be employed for scientific research and industrial applications. A novel RPHMF system design adopting a dual-capacitors type energy recovery power system is introduced in this paper. The energy stored in the magnet can be fed back to the capacitor by a choke coil and a resonant capacitor while the energy dissipated in the discharge will be replenished to the capacitor through a high frequency resonant capacitor charging power system (CCPS). The main advantages of the design are as followed: first, the energy feedback make the system more efficient;second, during the whole process there is no reverse voltage on the metalized film capacitors, improving the energy storage capacitors' service lifetime and reliability remarkably;finally, convenience can be brought to the high frequency CCPS's application. In this paper, theoretic analysis of RPHMF system is described and an experimental device with a bitter magnet as the load is built to test the design for its verification. A 1.2 Hz, 8 T repetitive pulsed high magnetic field is generated. Experimental results show that there is no reverse voltage on the energy storage capacitors in the whole process. The factors influencing the efficiency and frequency of the system are analyzed in detail. © 2012 Springer Science+Business Media New York.

关键词： Recovery

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Effect of High Electric Field on Lifetime Performance of Metalized Film Capacitor in Pulsed-power Applications

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高电压技术 2013年第8期39卷 2000-2005页

作者： LI Hua CHEN Yaohong WANG Bowen LI Zhiwei ZHANG Qin LIN Fuchang HE Wei State Key Laboratory of Advanced Electromagnetic Engineering and Technology College of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China Research Center of Laser Fusion China Academy of Engineering Mianyang 621900 China

High energy density capacitor is a key device to power supply source for electromagnetic gun (EMG) system, and extending its lifetime is important for increasing the reliability of the power source. Working in high electric field could affect the capacitor lifetime, and this effect on metallized polypropylene film capacitors (MPPFCs) in pulsed-power applications is studied and presented. Experimental re- sults show that the lifetime of MPPFCs decreases with the increasing peak value of charged electric field, and this decrease could be described by function (L/L0) ∝ (E/E0)–m, where, m=7.32. The lifetime of MPPFCs also decreases with the increase of the reversal coeffi- cients in underdamped circuits, which could be described by (L/L0) ∝ (ln(1/K0)/(ln(1/K))–b, where, b=0.7. These results provide a basis for the lifetime prediction of MPPFCs in pulsed-power applications.

关键词：金属化薄膜电容器寿命预测脉冲功率高电场应用性能高能量密度电力供给

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Safety analysis and protection measures of the control system of the pulsed high magnetic field facility in WHMFC

Safety analysis and protection measures of the control syste...

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作者： Shi, J.T. Han, X.T. Xie, J.F. Yao, L. Huang, L.T. Li, L. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan Hubei China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei China

A Pulsed High Magnetic Field Facility (PHMFF) has been established in Wuhan National High Magnetic Field Center (WHMFC) and various protection measures are applied in its control system. In order to improve the reliability and robustness of the control system, the safety analysis of the PHMFF is carried out based on Fault Tree Analysis (FTA) technique. The function and realization of 5 protection systems, which include sequence experiment operation system, safety assistant system, emergency stop system, fault detecting and processing system and accident isolating protection system, are given. The tests and operation indicate that these measures improve the safety of the facility and ensure the safety of people. © 2012 Springer Science+Business Media New York.

关键词： Fault tree analysis

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Design and realization of the control and measurement system of the long pulsed high magnetic field facility supplied by battery

Design and realization of the control and measurement system...

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作者： Xie, J.F. Xiong, Y.D. Han, X.T. Ding, T.H. Shi, J.T. Li, L. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan Hubei China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei China

A Control and Measurement System (CMS) is designed to ensure the reliable operation in the long pulsed high magnetic field facility supplied by lead-acid batteries. The CMS is mainly composed of a Programmable Logic Controller (PLC), a fault monitor and protection circuit, a signal processing and data acquisition unit, a local triggering sequence generator and the main control program. The system architecture and kernel parts of the CMS are analyzed and described in detail. The results prove that the designed CMS could perform efficiently and reliably. © 2012 Springer Science+Business Media New York.

关键词： Digital signal processors

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Test and operation of the WHMFC 12.6 MJ capacitor bank power supply system

Test and operation of the WHMFC 12.6 MJ capacitor bank power...

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作者： Ding, H.F. Jiang, C.X. Xu, Y. Ding, T.H. Zou, X.T. Li, L. Pan, Y. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

The 12.6 MJ capacitor bank power supply system of the Wuhan National High Magnetic Field Center (WHMFC) at Huazhong University of Science and technology (HUST) consists of 11 independent 1 MJ modules and 2 independent 0.8 MJ modules;it was tested and put into operation in October 2010. The capacitor bank power supply system connects to 8 measurement cells through three current collectors and four selectors. A number of nondestructive magnets for different bore sizes and peak fields have been energized by this system, including an 83 T dual stage magnet. The results of tests and operation are presented in this paper. © 2012 Springer Science+Business Media, LLC.

关键词： Electric power systems

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Research of the Soft Start Circuit for the High Voltage Power Supply Based on PSM technology

Research of the Soft Start Circuit for the High Voltage Powe...

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IEEE Symposium on Fusion engineering

作者： L.L. Xia M. Zhang S.X. Ma K.X. Yu State Key laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9781479901708

The power supply based on pulse step modulation (PSM) technology has been widely used as the high voltage power supply for additional heating systems, such as RF H&CD and NBI in tokamaks. The topology contains numbers of converters and multi-secondary transformers. For the magnetic inrush of the transformer and the charge current of the converters connecting with the secondary windings of transformer, the power up of the power supply system is quite complex. PSM power supply starts up by two steps: the soft start of transformer and the pre-charge of the converters. Resistor branches series with the transformer and each converter are used to limit the inrush current. A lot of resister branches and parallel contactors in the converter modules are required, as a result the dissipation and electromagnetic interference (EMI) are serious. In this paper, the soft start circuit is simplified to only one step for decreasing the dissipation and EMI. The pre-charge circuits of the converters which are connected to the secondary at first are diverted to the primary winding of transformer can also limit the magnetic inrush current. Since the multisecondary transformer powers up as the same time as converters, the capacitors in all converters will limit the ramp up rate of the transformer voltage, and the magnetic inrush current can be ignored. To analyze the characters of the pre-charge branches, all converters can be equaled as parallel during the soft start process. The equivalent circuit, a series RLC circuit, is proposed in this paper. A 1.2kV power supply, contains 12 converters, with soft-start has been built up in laboratory. Simulation and experiment results are shown to verify the theoretical analysis. A new soft start circuit of 100kV high voltage power supply system was designed.

关键词： power supply pulse step modulation soft start multi-secondary transformer capacitor

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Fungal diversity notes 367-490:taxonomic and phylogenetic contributions to fungal taxa

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Fungal Diversity 2016年第5期80卷 1-270页

作者： Kevin D.Hyde Sinang Hongsanan Rajesh Jeewon D.Jayarama Bhat Eric H.C.McKenzie E.B.Gareth Jones Rungtiwa Phookamsak Hiran A.Ariyawansa Saranyaphat Boonmee Qi Zhao Faten Awad Abdel-Aziz Mohamed A.Abdel-Wahab Supharat Banmai Putarak Chomnunti Bao-Kai Cui Dinushani A.Daranagama Kanad Das Monika C.Dayarathne Nimali Ide Silva Asha J.Dissanayake Mingkwan Doilom Anusha H.Ekanayaka Tatiana Baptista Gibertoni Aristóteles Góes-Neto Shi-Ke Huang Subashini C.Jayasiri Ruvishika S.Jayawardena Sirinapa Konta Hyang Burm Lee Wen-Jing Li Chuan-Gen Lin Jian-Kui Liu Yong-Zhong Lu Zong-Long Luo Ishara S.Manawasinghe Patinjareveettil Manimohan Ausana Mapook Tuula Niskanen Chada Norphanphoun Moslem Papizadeh Rekhani H.Perera Chayanard Phukhamsakda Christian Richter AndréL.C.Mde A.Santiago E.Ricardo Drechsler-Santos Indunil C.Senanayake Kazuaki Tanaka T.M.D.S.Tennakoon Kasun M.Thambugala Qing Tian Saowaluck Tibpromma Benjarong Thongbai Alfredo Vizzini Dhanushka N.Wanasinghe Nalin N.Wijayawardene Hai-Xia Wu Jing Yang Xiang-Yu Zeng Huang Zhang Jin-Feng Zhang Timur S.Bulgakov Erio Camporesi Ali H.Bahkali Mohammad A.Amoozegar Lidia Silva Araujo-Neta Joseph F.Ammirati Abhishek Baghela R.P.Bhatt Dimitar Bojantchev Bart Buyck Gladstone Alves da Silva Catarina Letícia Ferreira de Lima Rafael JoséVilela de Oliveira Carlos Alberto Fragoso de Souza Yu-Cheng Dai Bálint Dima Tham Thi Duong Enrico Ercole Fernando Mafalda-Freire Aniket Ghosh Akira Hashimoto Sutakorn Kamolhan Ji-Chuan Kang Samantha C.Karunarathna Paul M.Kirk Ilkka Kytovuori Angela Lantieri Kare Liimatainen Zuo-Yi Liu Xing-Zhong Liu Robert Lücking Gianfranco Medardi Peter E.Mortimer Thi Thuong Thuong Nguyen Itthayakorn Promputtha K.N.Anil Raj Mateus A.Reck Saisamorn Lumyong Seyed Abolhassan Shahzadeh-Fazeli Marc Stadler Mohammad Reza Soudi Hong-Yan Su Takumasa Takahashi Narumon Tangthirasunun Priyanka Uniyal Yong Wang Ting-Chi Wen Jian-Chu Xu Zhong-Kai Zhang Yong-Chang Zhao Jun-Liang Zhou Lin Zhu Institute of Biotechnology and Germplasm Resources Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation Ministry of AgricultureYunnan Provincial Key Laboratory of Agricultural BiotechnologyYunnan Academy of Agricultural SciencesKunming 650223YunnanPeople’s Republic of China Key Laboratory of Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanPeople’s Republic of China Center of Excellence in Fungal Research Mae Fah Luang University333 M.1T.ThasudMuangChiang Rai 57100Thailand State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesNo 31st West Beichen RoadChaoyang DistrictBeijing 100101People’s Republic of China Department of Botany and Microbiology College of ScienceKing Saud UniversityP.O.Box:2455Riyadh1145Saudi Arabia Department of Botany and Microbiology Faculty of ScienceSohag UniversitySohag 82524Egypt Faculty of Agriculture and Life Sciences Hirosaki University3 Bunkyo-choHirosakiAomori 036-8561Japan The United Graduate School of Agricultural Sciences Iwate University18-8 Ueda 3 ChomeMorioka 020-8550Japan Guizhou Key Laboratory of Agricultural Biotechnology Guizhou Academy of Agricultural SciencesXiaohe DistrictGuiyang CityGuizhou Province 550006People’s Republic of China School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Department of Plant Pathology College of AgricultureGuizhou UniversityGuiyang 550025GuizhouPeople’s Republic of China Department of Botany Goa UniversityTaleigãoGoaIndia No.128/1-J Azad Housing SocietyCurcaGoa Velha 403108India Department of Biology Faculty of ScienceChiang Mai UniversityChiang Mai 50200Thailand World Agroforestry Centre East and Central AsiaKunming 650201YunnanPeople’s Republic of China Centre of Mountain Ecosystem Studies Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanPeople’s Republic of China Department of Microbial Drugs Helmholtz Centre for Infection Res

This is a continuity of a series of taxonomic papers where materials are examined,described and novel combinations are proposed where necessary to improve our traditional species concepts and provide updates on their *** addition to extensive morphological descriptions and appropriate asexual and sexual connections,DNA sequence data are also analysed from concatenated datasets(rDNA,TEF-a,RBP2 and b-Tubulin)to infer phylogenetic relationships and substantiate systematic position of taxa within appropriate *** new species or combinations are being proposed,we apply an integrative approach(morphological and molecular data as well as ecological features wherever applicable).Notes on 125 fungal taxa are compiled in this paper,including eight new genera,101 new species,two new combinations,one neotype,four reference specimens,new host or distribution records for eight species and one alternative *** new genera introduced in this paper are Alloarthopyrenia,Arundellina,Camarosporioides,Neomassaria,Neomassarina,Neotruncatella,Paracapsulospora and *** new species are Alfaria spartii,Alloarthopyrenia italica,Anthostomella ravenna,***,Arthrinium paraphaeospermum,Arundellina typhae,Aspergillus koreanus,Asterina cynometrae,Bertiella ellipsoidea,Blastophorum aquaticum,Cainia globosa,Camarosporioides phragmitis,Ceramothyrium menglunense,Chaetosphaeronema achilleae,Chlamydotubeufia helicospora,Ciliochorella phanericola,Clavulinopsis aurantiaca,Colletotrichum insertae,Comoclathris italica,Coronophora myricoides,Cortinarius fulvescentoideus,***,***,***,Cunninghamella gigacellularis,Cyathus pyristriatus,Cytospora cotini,Dematiopleospora alliariae,***,Diaporthe aseana,***,Distoseptispora multiseptata,***,***,Dothiora buxi,Emericellopsis persica,Gloniopsis calami,Helicoma guttulatum,Helvella floriforma,***,Hermatomyces subiculosa,Ju

关键词： Ascomycota Basidiomycota Dothideomycetes Mortierellomycotina Mucoromycotina Pezizomycetes Phylogeny Taxonomy New genus New species New host records

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The preliminary design of Global Interlock System in J-TEXT

The preliminary design of Global Interlock System in J-TEXT

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2013 IEEE 25th Symposium on Fusion engineering, SOFE 2013

作者： Zheng, Guozhen Zheng, Wei Zhuang, Ge Zhang, Ming Ding, Tonghai State Key Laboratory of Advanced Electromagnetic Engineering and Technology College of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781479901715

J-TEXT COntrol, Data Access and Communication (CODAC) is an advanced control system designed for J-TEXT lab. In J-TEXT CODAC, some critical functions is implemented by some specialized Plant System. Global Interlock System (GIS) is a specialized Plant System of J-TEXT CODAC, which is responsible for coordinate the Plant Interlock Systems (PIS), in order to protect the experiment personnel occupational safety and instrument & equipment property safety. This paper gives a preliminary design of GIS. GIS is implemented with NI CompactRIO (CRIO). The FPGA module integrated in CRIO is used to handle input and output signals. The Real-Time controller in CRIO is responsible for accessing the EPICS network and configuring the onboard FPGA. Although currently the GIS is a small-scale prototype, the core functions, like fault handling and EPICS compatibility, are achieved. Now the GIS has been deployed in J-TEXT and serves in daily experiment. © 2013 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Circuit analysis and control of the DC power supply system for dynamic resonant magnetic perturbation coils on the J-TEXT tokamak

Circuit analysis and control of the DC power supply system f...

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第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： W.B.Zeng Yonghua Ding H.Y.Xu B.Yi B.Rao M.Zhang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

Four groups of in-vessel saddle coils have been installed on J-TEXT tokamak *** DC power supply(PS) system for dynamic resonant magnetic perturbation coils(DRMP) has been designed and put into operation *** non-circul... 详细信息

关键词： Circuit analysis and control of the DC power supply system for dynamic resonant magnetic perturbation coils on the J-TEXT tokamak

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