Pub Date : 2015-10-01DOI: 10.1109/INTLEC.2015.7572421
W. Martínez, J. Imaoka, Yuki Itoh, Masayoshi Yamamoto, K. Umetani
Nowadays, high power density has become essential in networking, telecommunications and computing applications. Additionally, the electronic equipment used in these applications requires a very-low voltage feeding even when its power supply has a much higher voltage rating. Therefore, high step-down converters with high power density performance are required for these applications. Consequently, a novel two-phase interleaved high step-down converter is proposed in order to fulfill the requirements of high power density and high step-down conversion ratio of these applications. The proposed converter addresses the objective by a particular coupled inductor where three windings are only installed in one core. As a result, the proposed converter can achieve higher step-down ratio than the conventional topologies by adding a winding and two switches to the interleaved two phase buck converter, besides the coupled-inductor configuration. In this paper, the novel topology is introduced and analyzed in order to find its conversion ratio operation. Then, the proposed topology is compared to conventional topologies and some improved high step-down converters recently proposed. Finally, the proposed converter is experimentally validated and the results revealed that the proposed converter shows higher step-down conversion ratio than the conventional buck converter with a further increment of 40% in the conversion ratio when the converter is operating at a duty cycle of 30% and ratio of turns of 2.
{"title":"A novel high step-down interleaved converter with coupled inductor","authors":"W. Martínez, J. Imaoka, Yuki Itoh, Masayoshi Yamamoto, K. Umetani","doi":"10.1109/INTLEC.2015.7572421","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572421","url":null,"abstract":"Nowadays, high power density has become essential in networking, telecommunications and computing applications. Additionally, the electronic equipment used in these applications requires a very-low voltage feeding even when its power supply has a much higher voltage rating. Therefore, high step-down converters with high power density performance are required for these applications. Consequently, a novel two-phase interleaved high step-down converter is proposed in order to fulfill the requirements of high power density and high step-down conversion ratio of these applications. The proposed converter addresses the objective by a particular coupled inductor where three windings are only installed in one core. As a result, the proposed converter can achieve higher step-down ratio than the conventional topologies by adding a winding and two switches to the interleaved two phase buck converter, besides the coupled-inductor configuration. In this paper, the novel topology is introduced and analyzed in order to find its conversion ratio operation. Then, the proposed topology is compared to conventional topologies and some improved high step-down converters recently proposed. Finally, the proposed converter is experimentally validated and the results revealed that the proposed converter shows higher step-down conversion ratio than the conventional buck converter with a further increment of 40% in the conversion ratio when the converter is operating at a duty cycle of 30% and ratio of turns of 2.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121977817","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572447
B. Kumar, Neeta Khare, P. K. Chaturvedi
A battery management system (BMS) is a system that manages a rechargeable battery (cell or battery pack), by protecting the battery to operate beyond its safe limits and monitoring its state of charge (SoC) & state of health (SoH). BMS has been the essential integral part of hybrid electrical vehicles (HEVs) & electrical vehicles (EVs). BMS provides safety to the system and user with run time monitoring of battery for any critical hazarder conditions. In the present work, design & simulation of BMS for EVs is presented. The entire model of BMS & all other functional blocks of BMS are implemented in Simulink toolbox of MATLAB R2012a. The BMS presented in this research paper includes Neural Network Controller (NNC), Fuzzy Logic Controller (FLC) & Statistical Model. The battery parameters required to design and simulate the BMS are extracted from the experimental results and incorporated in the model. The Neuro-Fuzzy approach is used to model the electrochemical behavior of the Lead-acid battery (selected for case study) then used to estimate the SoC. The Statistical model is used to address battery's SoH. Battery cycle test results have been used for initial model design, Neural Network training and later; it is transferred to the design & simulation of BMS using Simulink. The simulation results are validated by experimental results and MATLAB/Simulink simulation. This model provides more than 97% accuracy in SoC and reasonably accurate SoH.
{"title":"Advanced battery management system using MATLAB/Simulink","authors":"B. Kumar, Neeta Khare, P. K. Chaturvedi","doi":"10.1109/INTLEC.2015.7572447","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572447","url":null,"abstract":"A battery management system (BMS) is a system that manages a rechargeable battery (cell or battery pack), by protecting the battery to operate beyond its safe limits and monitoring its state of charge (SoC) & state of health (SoH). BMS has been the essential integral part of hybrid electrical vehicles (HEVs) & electrical vehicles (EVs). BMS provides safety to the system and user with run time monitoring of battery for any critical hazarder conditions. In the present work, design & simulation of BMS for EVs is presented. The entire model of BMS & all other functional blocks of BMS are implemented in Simulink toolbox of MATLAB R2012a. The BMS presented in this research paper includes Neural Network Controller (NNC), Fuzzy Logic Controller (FLC) & Statistical Model. The battery parameters required to design and simulate the BMS are extracted from the experimental results and incorporated in the model. The Neuro-Fuzzy approach is used to model the electrochemical behavior of the Lead-acid battery (selected for case study) then used to estimate the SoC. The Statistical model is used to address battery's SoH. Battery cycle test results have been used for initial model design, Neural Network training and later; it is transferred to the design & simulation of BMS using Simulink. The simulation results are validated by experimental results and MATLAB/Simulink simulation. This model provides more than 97% accuracy in SoC and reasonably accurate SoH.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121985831","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572472
Atsushi Sato, Nobuyuki Morii, Hidetaka Sato
A surge protective device (SPD) is used in low-voltage power systems to protect electrical equipment from surges induced by lightning. An SPD has a drawback that its impedance becomes low in case of SPD failure. This failure can cause not only the SPD, or other devices near it, to catch fire or make an upstream over current protection device (OCPD) operate unnecessary, and also can cause serious damage to power-supply facilities and lead to loss of reliability concerning customers. Using a conventional overcurrent protector such as a low-voltage fuse or molded-case circuit breaker (MCCB) cannot reduce this risk. Since an existing overcurrent protector cannot be applied to an SPD disconnector, a special-purpose fuse, called a “fuse-type SPD disconnector” (SFD), was developed. The specification of the developed SFD is described, and guidelines for selecting the appropriate SFD in combination with an OCPD to reduce serious risk in case of SPD failure are proposed.
{"title":"Development of a fuse-type SPD disconnector for power supply system and the application guide","authors":"Atsushi Sato, Nobuyuki Morii, Hidetaka Sato","doi":"10.1109/INTLEC.2015.7572472","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572472","url":null,"abstract":"A surge protective device (SPD) is used in low-voltage power systems to protect electrical equipment from surges induced by lightning. An SPD has a drawback that its impedance becomes low in case of SPD failure. This failure can cause not only the SPD, or other devices near it, to catch fire or make an upstream over current protection device (OCPD) operate unnecessary, and also can cause serious damage to power-supply facilities and lead to loss of reliability concerning customers. Using a conventional overcurrent protector such as a low-voltage fuse or molded-case circuit breaker (MCCB) cannot reduce this risk. Since an existing overcurrent protector cannot be applied to an SPD disconnector, a special-purpose fuse, called a “fuse-type SPD disconnector” (SFD), was developed. The specification of the developed SFD is described, and guidelines for selecting the appropriate SFD in combination with an OCPD to reduce serious risk in case of SPD failure are proposed.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121998293","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572312
Kosuke Sato, H. Haga, Seiji Kondo Nagaoka
This paper focuses on the circuit which is to reduce the number of switching elements in comparison to a common multi-level inverter NPC inverter. Increasing the number of levels of the output voltage at reduced circuit number switching elements, and performs waveform improvement. Typically, the ratio of the input voltage of the multi-level inverter is E1 : E2 = 1 : 1. When the ratio of the input voltage is 1 : 1, the number of the levels of the output voltage becomes only five-levels. Therefore, it increases the number of levels of the output voltage to a level seven by setting the ratio of the input voltage is E1 : E2=1 : 2. It is subjected to waveform improvement by increasing the number of levels of output voltage. Reducing the number of switching elements is advantageous for downsizing of the cost of the surface and the circuit. The simulated and experimental results demonstrate the effectiveness of seven-level operation in 6-switches inverter. Furthermore, this paper confirms same loss characteristics of the proposed multi-level inverter compare to the conventional NPC inverter.
{"title":"Single-phase 7-level inverter for reducing number of switches","authors":"Kosuke Sato, H. Haga, Seiji Kondo Nagaoka","doi":"10.1109/INTLEC.2015.7572312","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572312","url":null,"abstract":"This paper focuses on the circuit which is to reduce the number of switching elements in comparison to a common multi-level inverter NPC inverter. Increasing the number of levels of the output voltage at reduced circuit number switching elements, and performs waveform improvement. Typically, the ratio of the input voltage of the multi-level inverter is E1 : E2 = 1 : 1. When the ratio of the input voltage is 1 : 1, the number of the levels of the output voltage becomes only five-levels. Therefore, it increases the number of levels of the output voltage to a level seven by setting the ratio of the input voltage is E1 : E2=1 : 2. It is subjected to waveform improvement by increasing the number of levels of output voltage. Reducing the number of switching elements is advantageous for downsizing of the cost of the surface and the circuit. The simulated and experimental results demonstrate the effectiveness of seven-level operation in 6-switches inverter. Furthermore, this paper confirms same loss characteristics of the proposed multi-level inverter compare to the conventional NPC inverter.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122004410","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572290
Hiroshi Ishidate, K. Otomo, Toshihiro Sato
We verified that a large selective breaking capacity could be ensured without using high-performance breakers by conducting breaking tests as a distribution board rather than making the selection based on the catalog specifications of the breaker manufacturer when selecting a breaker for distribution boards in data centers.
{"title":"Verification of selective breaking performance by distribution board for data centers","authors":"Hiroshi Ishidate, K. Otomo, Toshihiro Sato","doi":"10.1109/INTLEC.2015.7572290","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572290","url":null,"abstract":"We verified that a large selective breaking capacity could be ensured without using high-performance breakers by conducting breaking tests as a distribution board rather than making the selection based on the catalog specifications of the breaker manufacturer when selecting a breaker for distribution boards in data centers.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122621288","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572288
Toshiaki Murakami, T. Kikuchi, K. Hirose
The multiple type of renewable energy system that combines solar power, fuel cell, battery was introduced for the purpose of power economic use of normal time and a stable power supply at the time of the disaster in Road Station, Gifu Prefecture Ibi town “Hoshinofurusato Fujihashi”. This paper presents the availability of its system in the ground of operational status of normal time and operational status on the behavior of the power failure and power recovery that occurred in the commercial system.
{"title":"Introduction and its operational status of multiple type of renewable energy system in regional disaster prevention base","authors":"Toshiaki Murakami, T. Kikuchi, K. Hirose","doi":"10.1109/INTLEC.2015.7572288","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572288","url":null,"abstract":"The multiple type of renewable energy system that combines solar power, fuel cell, battery was introduced for the purpose of power economic use of normal time and a stable power supply at the time of the disaster in Road Station, Gifu Prefecture Ibi town “Hoshinofurusato Fujihashi”. This paper presents the availability of its system in the ground of operational status of normal time and operational status on the behavior of the power failure and power recovery that occurred in the commercial system.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120982155","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572442
Mitsuru Sato, G. M. Dousoky, M. Shoyama
This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output. Proposed SR control scheme can properly achieve SR at full load condition a simple implementation. Furthermore, it is capable of suppressing circulating current from output to input than conventional SR control scheme in light load condition. Thus, proposed SR control scheme can improve efficiency rather than conventional SR control scheme.
{"title":"Improved digital control scheme of synchronous rectification for resonant converter at light load conditions","authors":"Mitsuru Sato, G. M. Dousoky, M. Shoyama","doi":"10.1109/INTLEC.2015.7572442","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572442","url":null,"abstract":"This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output. Proposed SR control scheme can properly achieve SR at full load condition a simple implementation. Furthermore, it is capable of suppressing circulating current from output to input than conventional SR control scheme in light load condition. Thus, proposed SR control scheme can improve efficiency rather than conventional SR control scheme.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121365487","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572401
Liping Sun, Z. Ding, Desheng Guo, Lihao Yan, Chao Yan
Efficiency and power density are the two most important index of the telecom rectifier development. During recent years, the efficiency of the telecom rectifier is pushed from 92% to 96% and now 98%, this paper however explores the design considerations of super high density (100W/inch3) telecom rectifiers in concert with high efficiency requirements (96%). Specifically, the design considerations of a high switching frequency (1MHz) and high efficiency interleaving totem pole PFC stage with DCM boundary control followed by a high resonant frequency (500kHz), PCB winding based LLC DCDC stage is explained. The wide band device 650V GaN HEMT is used for both PFC stage and D2D stage. Experimental results are presented to validate the design concept to meet the power density and efficiency target.
效率和功率密度是电信整流器发展的两个最重要的指标。近年来，电信整流器的效率从92%提高到96%，现在达到98%，但本文探讨了超高密度(100W/inch3)电信整流器的设计考虑，以满足高效率(96%)的要求。具体来说，解释了高开关频率(1MHz)和高效率交错图腾杆PFC级与DCM边界控制，然后是高谐振频率(500kHz)，基于PCB绕组的LLC DCDC级的设计考虑。宽带器件650V GaN HEMT用于PFC级和D2D级。实验结果验证了该设计理念能够满足功率密度和效率目标。
{"title":"High efficiency high density telecom rectifier with GaN device","authors":"Liping Sun, Z. Ding, Desheng Guo, Lihao Yan, Chao Yan","doi":"10.1109/INTLEC.2015.7572401","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572401","url":null,"abstract":"Efficiency and power density are the two most important index of the telecom rectifier development. During recent years, the efficiency of the telecom rectifier is pushed from 92% to 96% and now 98%, this paper however explores the design considerations of super high density (100W/inch3) telecom rectifiers in concert with high efficiency requirements (96%). Specifically, the design considerations of a high switching frequency (1MHz) and high efficiency interleaving totem pole PFC stage with DCM boundary control followed by a high resonant frequency (500kHz), PCB winding based LLC DCDC stage is explained. The wide band device 650V GaN HEMT is used for both PFC stage and D2D stage. Experimental results are presented to validate the design concept to meet the power density and efficiency target.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124152680","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572424
D. Talapko, S. Tesnjak
This paper addresses availability of power infrastructure in data centers and associated costs for downtime. Special attention is given to modeling of solar power sources in terms of availability as well as their implementation into critical infrastructure and the justification for their implementation from cost perspective. Influence on overall electrical reliability and availability of infrastructure is shown in different topologies. Architecture of the topologies is based on both alternating current (AC) and direct current (DC) 400V distributions. Results of reliability and availability calculations derive from models based on Dynamic Fault Tree Analysis (DFTA).
{"title":"Influence of availability on the cost analysis of solar powered data centers with AC and DC architecture and mirroring functionality","authors":"D. Talapko, S. Tesnjak","doi":"10.1109/INTLEC.2015.7572424","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572424","url":null,"abstract":"This paper addresses availability of power infrastructure in data centers and associated costs for downtime. Special attention is given to modeling of solar power sources in terms of availability as well as their implementation into critical infrastructure and the justification for their implementation from cost perspective. Influence on overall electrical reliability and availability of infrastructure is shown in different topologies. Architecture of the topologies is based on both alternating current (AC) and direct current (DC) 400V distributions. Results of reliability and availability calculations derive from models based on Dynamic Fault Tree Analysis (DFTA).","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126398775","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 : 2015-10-01DOI: 10.1109/INTLEC.2015.7572308
S. Abe, J. Yamamoto, T. Ninomiya
This paper proposes a PFM+PWM hybrid controlled soft-switching half-bridge converter which has both benefit of conventional half-bridge converter and LLC converter. Generally, conventional half-bridge converter has good constant current characteristic due to PWM control, however it has some drawbacks of (1) primary side switches and secondary side diodes operate under hard switching, (2) two magnetic components. Meanwhile, the LLC resonant converter has the benefit of achieving ZVS and ZCS, however it can't realize a constant current (CC) characteristic because of resonant fashion. In order to achieve soft-switching and CC characteristic using half-bridge converter, a DCM operation are employed, which can be controlled by PWM+PFM Hybrid Control. In this paper the operating characteristics of the proposed half-bridge converter are experimentally verified. The experimental results for 48Vin, 16Vo, 80W board achieves 90% efficiency and validated this method is useful practically.
{"title":"Hybrid controlled soft-switching half-bridge converter in DCM operation with voltage doubler rectifier for battery charge application","authors":"S. Abe, J. Yamamoto, T. Ninomiya","doi":"10.1109/INTLEC.2015.7572308","DOIUrl":"https://doi.org/10.1109/INTLEC.2015.7572308","url":null,"abstract":"This paper proposes a PFM+PWM hybrid controlled soft-switching half-bridge converter which has both benefit of conventional half-bridge converter and LLC converter. Generally, conventional half-bridge converter has good constant current characteristic due to PWM control, however it has some drawbacks of (1) primary side switches and secondary side diodes operate under hard switching, (2) two magnetic components. Meanwhile, the LLC resonant converter has the benefit of achieving ZVS and ZCS, however it can't realize a constant current (CC) characteristic because of resonant fashion. In order to achieve soft-switching and CC characteristic using half-bridge converter, a DCM operation are employed, which can be controlled by PWM+PFM Hybrid Control. In this paper the operating characteristics of the proposed half-bridge converter are experimentally verified. The experimental results for 48Vin, 16Vo, 80W board achieves 90% efficiency and validated this method is useful practically.","PeriodicalId":211948,"journal":{"name":"2015 IEEE International Telecommunications Energy Conference (INTELEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130406980","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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