Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351828
Shinya Hiromitsu, M. Ogawa, S. Abe, M. Shoyama, Y. Yonezawa, N. Mishima
In this paper, a transient current circuit is introduced. The circuit evidently reduces switching loss of buck converter main switch dramatically. This topology enables to operate high-frequency. The validity of the transient current circuit is verified through simulations and experiments.
{"title":"Transient current circuit for switching loss reduction in buck converters","authors":"Shinya Hiromitsu, M. Ogawa, S. Abe, M. Shoyama, Y. Yonezawa, N. Mishima","doi":"10.1109/INTLEC.2009.5351828","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351828","url":null,"abstract":"In this paper, a transient current circuit is introduced. The circuit evidently reduces switching loss of buck converter main switch dramatically. This topology enables to operate high-frequency. The validity of the transient current circuit is verified through simulations and experiments.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123098309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351760
J. Aguillon-Garcia, G. Moon
For galvanic isolation of a three-phase power supply, the common choice for cost and volume is the three-legged core. Unfortunately this type of core has an inherent power flux asymmetry attributable to the core geometry. This work focuses on a singular geometrical symmetric-flux core, which naturally solve asymmetry problem due to equal mutual impedances between phases. Magnetic circuit theory, finite-element analysis (FEA), and metric analysis of symmetric and three-legged core are used to illustrate the use and extent of the analytical results.
{"title":"Examination for a symmetric-flux ferrite core for three-phase converter applications","authors":"J. Aguillon-Garcia, G. Moon","doi":"10.1109/INTLEC.2009.5351760","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351760","url":null,"abstract":"For galvanic isolation of a three-phase power supply, the common choice for cost and volume is the three-legged core. Unfortunately this type of core has an inherent power flux asymmetry attributable to the core geometry. This work focuses on a singular geometrical symmetric-flux core, which naturally solve asymmetry problem due to equal mutual impedances between phases. Magnetic circuit theory, finite-element analysis (FEA), and metric analysis of symmetric and three-legged core are used to illustrate the use and extent of the analytical results.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124854334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351915
Shohei Otsu, Terukazu Sato, T. Nabeshima, K. Nishijima
In order to have a power supply with high voltage conversion ratio for low voltage and high current digital ICs, this paper presents a new two stage converter combined with a coupling capacitor. A bottom switch of the first stage is removed and the switching nodes of the first stage and the second stage are coupled together by the coupling capacitor. The steady state analysis is performed and the voltage conversion ratio is derived which is found to be larger than single stage converter. A 12V to 1V prototype converter is implemented to confirm the analysis. The higher power efficiency compared with conventional converter is achieved.
{"title":"Steady state analysis of two stage converter combined with coupling capacitor","authors":"Shohei Otsu, Terukazu Sato, T. Nabeshima, K. Nishijima","doi":"10.1109/INTLEC.2009.5351915","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351915","url":null,"abstract":"In order to have a power supply with high voltage conversion ratio for low voltage and high current digital ICs, this paper presents a new two stage converter combined with a coupling capacitor. A bottom switch of the first stage is removed and the switching nodes of the first stage and the second stage are coupled together by the coupling capacitor. The steady state analysis is performed and the voltage conversion ratio is derived which is found to be larger than single stage converter. A 12V to 1V prototype converter is implemented to confirm the analysis. The higher power efficiency compared with conventional converter is achieved.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125547382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351909
A. Kiri, Kouta Ohara, Y. Tomita, Seiji Shukuri, T. Yasukouchi, T. Suetsugu
A switching power amplifier which can be operated as a class D amplifier and a class E amplifier is proposed. The proposed circuit can be operated as a high efficiency soft switching power amplifier at a high operating frequency and it also can be operated as a class D amplifier at a low operating frequency.
{"title":"Class D and class E selectable power amplifier","authors":"A. Kiri, Kouta Ohara, Y. Tomita, Seiji Shukuri, T. Yasukouchi, T. Suetsugu","doi":"10.1109/INTLEC.2009.5351909","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351909","url":null,"abstract":"A switching power amplifier which can be operated as a class D amplifier and a class E amplifier is proposed. The proposed circuit can be operated as a high efficiency soft switching power amplifier at a high operating frequency and it also can be operated as a class D amplifier at a low operating frequency.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351790
Sanggon Lee, Sanghoon Kim, Y. Jeong, Sang-Yong Jung
This paper deals with modeling and characteristic analysis of a large powered electric ship propulsion system. Particularly, electric power system modeling has been accomplished in accordance with the electric power network mainly composed of generators, switchboards, variable frequency devices, electric motors, and etc. In addition, electric power system analysis has been performed via load flow analysis. In particular, abnormal operating condition of the short circuited network is thoroughly investigated for estimating the short circuited current with the short time rating and implementing the system safety with the protection relay(IEEE Std. 141–1993).
{"title":"Power system modeling and analysis of electric ship propulsion system","authors":"Sanggon Lee, Sanghoon Kim, Y. Jeong, Sang-Yong Jung","doi":"10.1109/INTLEC.2009.5351790","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351790","url":null,"abstract":"This paper deals with modeling and characteristic analysis of a large powered electric ship propulsion system. Particularly, electric power system modeling has been accomplished in accordance with the electric power network mainly composed of generators, switchboards, variable frequency devices, electric motors, and etc. In addition, electric power system analysis has been performed via load flow analysis. In particular, abnormal operating condition of the short circuited network is thoroughly investigated for estimating the short circuited current with the short time rating and implementing the system safety with the protection relay(IEEE Std. 141–1993).","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114477303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352004
Byeong-Hwa Lee, Fangliang, Jung-Pyo Hong, H. Nam
This paper deals with double-layer rotor design and design method of a single-phase line-start permanent magnet (LSPM) motor considering the efficiency and maximum torque with d-and q-axis equivalent circuit and finite element method (FEM). The motor parameters meeting the required efficiency, starting and maximum torque are determined by the characteristic map obtained by the d-q axis equivalent circuit analysis, then the geometric shape design satisfying the motor parameters are performed with FEM. In the end, the improved double-layer LSPM motor is fabricated and tested in order to measure the efficiency and maximum torque.
{"title":"Double-layer rotor design for improving characteristics of single-phase LSPM motor","authors":"Byeong-Hwa Lee, Fangliang, Jung-Pyo Hong, H. Nam","doi":"10.1109/INTLEC.2009.5352004","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352004","url":null,"abstract":"This paper deals with double-layer rotor design and design method of a single-phase line-start permanent magnet (LSPM) motor considering the efficiency and maximum torque with d-and q-axis equivalent circuit and finite element method (FEM). The motor parameters meeting the required efficiency, starting and maximum torque are determined by the characteristic map obtained by the d-q axis equivalent circuit analysis, then the geometric shape design satisfying the motor parameters are performed with FEM. In the end, the improved double-layer LSPM motor is fabricated and tested in order to measure the efficiency and maximum torque.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129700006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352009
Jong-Hyen Baek
KORAIL carries out an improvement project of railway signaling system for the conventional line from the existing method which permits a train to move within limited speed the ground signal of ATS(Automatic Train Stop) system. The proposed system makes possible that a train can be driven using a speed profile created by onboard signaling system(ATP) with the movement authority from ground balise. A driving test over 100,000km is being executed by developing a tilting train for the speed elevation on the conventional line. And, the introduction of the tilting train by ATP system to the Jung-ang line is expected. However, a speed elevation on a curved line section has a restriction. Therefore, research on safety braking model and train separation control technology for the localization of ATP system is required preferentially. In this paper, we presented a safety braking model of ATP system and a train separation control method that use ground balise as variable information provider, and executed a performance simulation.
{"title":"The Study on train separation control & safety braking model technology using balise for conventional lines","authors":"Jong-Hyen Baek","doi":"10.1109/INTLEC.2009.5352009","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352009","url":null,"abstract":"KORAIL carries out an improvement project of railway signaling system for the conventional line from the existing method which permits a train to move within limited speed the ground signal of ATS(Automatic Train Stop) system. The proposed system makes possible that a train can be driven using a speed profile created by onboard signaling system(ATP) with the movement authority from ground balise. A driving test over 100,000km is being executed by developing a tilting train for the speed elevation on the conventional line. And, the introduction of the tilting train by ATP system to the Jung-ang line is expected. However, a speed elevation on a curved line section has a restriction. Therefore, research on safety braking model and train separation control technology for the localization of ATP system is required preferentially. In this paper, we presented a safety braking model of ATP system and a train separation control method that use ground balise as variable information provider, and executed a performance simulation.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129753028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352038
C. Nge, O. Midtgård, L. Norum, T. O. Saetre
This paper presents a method for power loss analysis applied on single-phase grid-connected PV inverter. The often neglected current ripple effects are included in power device switching and conduction losses. The relationships amongst component losses, output inductance, switching frequency and dc-link voltage are investigated. It is shown that current ripple effect is important to power loss analysis due to varying irradiation. The closed form solutions of component losses are proposed and verified with SPICE simulation results.
{"title":"Power loss analysis for single phase grid-connected PV inverters","authors":"C. Nge, O. Midtgård, L. Norum, T. O. Saetre","doi":"10.1109/INTLEC.2009.5352038","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352038","url":null,"abstract":"This paper presents a method for power loss analysis applied on single-phase grid-connected PV inverter. The often neglected current ripple effects are included in power device switching and conduction losses. The relationships amongst component losses, output inductance, switching frequency and dc-link voltage are investigated. It is shown that current ripple effect is important to power loss analysis due to varying irradiation. The closed form solutions of component losses are proposed and verified with SPICE simulation results.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128417191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351999
Ho-Kyoung Lim, Jae-Woo Jung, Jung-Pyo Hong
Hydraulic system of commercial vehicle is switched electromechanical system for development of next generation vehicle recently. For example electric steering system and electric break system. This paper proposes the structural of magnetic suspension for next generation vehicle and deals with optimization of geometry of magnetic suspension. Two main characteristics are required in design of magnetic suspension. Firstly, magnetic motive force (MMF) by armature winding should have linearity. Secondly, identical magnitude of output force should be produced as direction of MMF for easily control. In this paper, axis-symmetric finite element analysis is used for analysis of magnetic field analysis. In order to optimize magnetic suspension, response surface methodology combined with experimental design is applied to investigate the characteristics and optimize the magnetic suspension.
{"title":"Optimization of magnetic suspension using response surface methodology","authors":"Ho-Kyoung Lim, Jae-Woo Jung, Jung-Pyo Hong","doi":"10.1109/INTLEC.2009.5351999","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351999","url":null,"abstract":"Hydraulic system of commercial vehicle is switched electromechanical system for development of next generation vehicle recently. For example electric steering system and electric break system. This paper proposes the structural of magnetic suspension for next generation vehicle and deals with optimization of geometry of magnetic suspension. Two main characteristics are required in design of magnetic suspension. Firstly, magnetic motive force (MMF) by armature winding should have linearity. Secondly, identical magnitude of output force should be produced as direction of MMF for easily control. In this paper, axis-symmetric finite element analysis is used for analysis of magnetic field analysis. In order to optimize magnetic suspension, response surface methodology combined with experimental design is applied to investigate the characteristics and optimize the magnetic suspension.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128214888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5352086
M. Anwari, A. Hidayat, M. I. Hamid, Taufik
This paper presents a wireless system for monitoring the input and output of the array in a photovoltaic generation plant. The system comprises of sensors, data acquisition system, wireless access point and user computer that enable the users to access the array parameter wirelessly. Description and function of set up equipment are presented as well as the application program that supports the system.
{"title":"Wireless data acquisition for photovoltaic power system","authors":"M. Anwari, A. Hidayat, M. I. Hamid, Taufik","doi":"10.1109/INTLEC.2009.5352086","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352086","url":null,"abstract":"This paper presents a wireless system for monitoring the input and output of the array in a photovoltaic generation plant. The system comprises of sensors, data acquisition system, wireless access point and user computer that enable the users to access the array parameter wirelessly. Description and function of set up equipment are presented as well as the application program that supports the system.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123833970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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