Pub Date : 2006-12-04DOI: 10.1109/INTLEC.2006.251644
A. Kwasinski, W. Weaver, P. Chapman, P. Krein
This paper extends knowledge of disaster impact on the telecommunications power infrastructure. It presents results both from an on-site survey conducted in October 2005 in the area affected by Hurricane Katrina and from industry and government sources. The analysis includes observations about power infrastructure damage to wire-line networks, wireless networks, transmission links, cable TV grids, and TV and radio facilities along a wide section of the U.S. Gulf Coast. In general, the impact on centralized network elements was more severe than on the distributed portion of the grids. The main cause of outage was lack of power due to fuel supply disruptions, flooding and security issues. This work also describes the means used to restore telecommunications services and proposes ways to improve logistics, such as coordinating genset deployment between different network operators and reducing genset fuel consumption by installing permanent photovoltaic systems at certain sites where long electric outages are expected
{"title":"Telecommunications Power Plant Damage Assessment Caused by Hurricane Katrina - Site Survey and Follow-Up Results","authors":"A. Kwasinski, W. Weaver, P. Chapman, P. Krein","doi":"10.1109/INTLEC.2006.251644","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251644","url":null,"abstract":"This paper extends knowledge of disaster impact on the telecommunications power infrastructure. It presents results both from an on-site survey conducted in October 2005 in the area affected by Hurricane Katrina and from industry and government sources. The analysis includes observations about power infrastructure damage to wire-line networks, wireless networks, transmission links, cable TV grids, and TV and radio facilities along a wide section of the U.S. Gulf Coast. In general, the impact on centralized network elements was more severe than on the distributed portion of the grids. The main cause of outage was lack of power due to fuel supply disruptions, flooding and security issues. This work also describes the means used to restore telecommunications services and proposes ways to improve logistics, such as coordinating genset deployment between different network operators and reducing genset fuel consumption by installing permanent photovoltaic systems at certain sites where long electric outages are expected","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132242254","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251617
B. Maher, J. Dogterom, T. Fisher
Hydrogenics Corporation has collaborated with Maxwell Technologies to demonstrate the viability of fuel cells and ultracapacitors for extended run backup power systems. Both companies have been working together to develop new products in combination that provide increased availability and backup power runtime to address the demanding standards and requirements of the telecommunication industry. Based on proton exchange membrane (PEM) technology, the fuel cell and ultracapacitor solution utilizes hydrogen for energy storage and has demonstrated the flexibility to meet real telecom load backup power needs. These rack-mountable and space efficient backup generators utilize hydrogen to offer high quality extended run backup power, zero emissions and are turnkey solutions capable of replacing incumbent technology. The paper will discuss how the system has been designed to meet telecommunication industry benchmarks requirements including the design philosophy and functionality, and the technical configuration and specification
{"title":"Fuel Cells and Ultracapacitors: a Proven Value Proposition versus Incumbent Technologies","authors":"B. Maher, J. Dogterom, T. Fisher","doi":"10.1109/INTLEC.2006.251617","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251617","url":null,"abstract":"Hydrogenics Corporation has collaborated with Maxwell Technologies to demonstrate the viability of fuel cells and ultracapacitors for extended run backup power systems. Both companies have been working together to develop new products in combination that provide increased availability and backup power runtime to address the demanding standards and requirements of the telecommunication industry. Based on proton exchange membrane (PEM) technology, the fuel cell and ultracapacitor solution utilizes hydrogen for energy storage and has demonstrated the flexibility to meet real telecom load backup power needs. These rack-mountable and space efficient backup generators utilize hydrogen to offer high quality extended run backup power, zero emissions and are turnkey solutions capable of replacing incumbent technology. The paper will discuss how the system has been designed to meet telecommunication industry benchmarks requirements including the design philosophy and functionality, and the technical configuration and specification","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"455 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115620955","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251636
M. K. Rahmat, S. Jovanovic, K. Lo
This paper investigates the application of the Boolean truth table modelling method in estimating the reliability parameters such as the system's failure rates and mean time between failures (MTBF), for the uninterruptible power supply (UPS) systems. All possible state combinations (operating and failed states) of the major components in the UPS systems were listed and their effects on overall system were studied. The method was applied to five UPS configurations and the results obtained were compared to the results from other reliability estimation method such as the reliability block diagram (RBD) method and field data estimation method
{"title":"Reliability Estimation of Uninterruptible Power Supply Systems: Boolean Truth Table Method","authors":"M. K. Rahmat, S. Jovanovic, K. Lo","doi":"10.1109/INTLEC.2006.251636","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251636","url":null,"abstract":"This paper investigates the application of the Boolean truth table modelling method in estimating the reliability parameters such as the system's failure rates and mean time between failures (MTBF), for the uninterruptible power supply (UPS) systems. All possible state combinations (operating and failed states) of the major components in the UPS systems were listed and their effects on overall system were studied. The method was applied to five UPS configurations and the results obtained were compared to the results from other reliability estimation method such as the reliability block diagram (RBD) method and field data estimation method","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125810812","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251675
D. Garinto
In low voltage and high current application, specially for future microprocessors, there is a serious challenge to present voltage regulators with high efficiency, high power density, fast transient response and low-cost. As previously identified, multiphase interleaving buck converter is not enough to meet the power challenges because the technical conflicts of duty cycle and switching frequency impair the efficiency. In this paper, new converter architectures with multi-interleaving technique are proposed to remove the technical conflicts. Multiphase buck converters with multi-interleaving technique perform better than with interleaving technique because the multi-interleaving technique can improve current ripple cancellation effect. Moreover, the multi-interleaving technique can extend duty cycle, can improve transient response without increasing current ripple in each cell, and can raise the switching frequency with low switching, gate drive and body diode losses. Losses analysis and simulation results show that the proposed converter architectures provide an opportunity to resolve the power challenges. As a result, extending Moore's Law without increasing power consumption can be realized
{"title":"New Converter Architectures with Multi-interleaving Technique for Future Microprocessors","authors":"D. Garinto","doi":"10.1109/INTLEC.2006.251675","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251675","url":null,"abstract":"In low voltage and high current application, specially for future microprocessors, there is a serious challenge to present voltage regulators with high efficiency, high power density, fast transient response and low-cost. As previously identified, multiphase interleaving buck converter is not enough to meet the power challenges because the technical conflicts of duty cycle and switching frequency impair the efficiency. In this paper, new converter architectures with multi-interleaving technique are proposed to remove the technical conflicts. Multiphase buck converters with multi-interleaving technique perform better than with interleaving technique because the multi-interleaving technique can improve current ripple cancellation effect. Moreover, the multi-interleaving technique can extend duty cycle, can improve transient response without increasing current ripple in each cell, and can raise the switching frequency with low switching, gate drive and body diode losses. Losses analysis and simulation results show that the proposed converter architectures provide an opportunity to resolve the power challenges. As a result, extending Moore's Law without increasing power consumption can be realized","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134520890","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251622
W. Phipps, R. Duke, M. Harrison
This paper describes the development of a new generation of DC converter used to supply power to telecommunications equipment. Traditional topologies have been single-phase two-stage designs. As a consequence of having a two-stage design there are losses across both stages, resulting in a cascading effect. A new type of converter is proposed that utilizes a three-phase single-stage design and as a result, has efficiency advantages over the traditional approach. Output regulation is normally achieved by means of a PI feedback control. However, under conditions of a step load change there is considerable overshoot. A control technique, known as pseudo-derivative feedback control (PDF) is introduced, and simulation results show an improved response to a step load change
{"title":"A Proposal for a New Generation Power Converter With Pseudo-Derivative Control","authors":"W. Phipps, R. Duke, M. Harrison","doi":"10.1109/INTLEC.2006.251622","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251622","url":null,"abstract":"This paper describes the development of a new generation of DC converter used to supply power to telecommunications equipment. Traditional topologies have been single-phase two-stage designs. As a consequence of having a two-stage design there are losses across both stages, resulting in a cascading effect. A new type of converter is proposed that utilizes a three-phase single-stage design and as a result, has efficiency advantages over the traditional approach. Output regulation is normally achieved by means of a PI feedback control. However, under conditions of a step load change there is considerable overshoot. A control technique, known as pseudo-derivative feedback control (PDF) is introduced, and simulation results show an improved response to a step load change","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"79 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134531154","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251633
A. Cannone, W. Cantor, D. Feder
For centuries, reference electrodes have been the tool of choice for laboratory electrochemists, in their attempts to obtain a more basic understanding of fundamental electrochemical processes. In the first half of the 20th century, lead antimony stationary batteries were in widespread use for reserve power back-up. Their life-limiting, progressively increasing antimony poisoning effect so dominated the electrochemical depolarization characteristics of these batteries as to allow simple cell voltage and specific gravity measurements to serve as suitable diagnostics of proper float and aging behavior, effectively obviating the need for reference electrode use. With the introduction of low corrosion, low float current, antimony-free lead electrode technology at mid-century, diagnostics became more complex. Individual cell float voltage and specific gravity became virtually meaningless as a diagnostic, useful only to detect shorted cells. Float voltage variations were dominated by the negative electrode, telling the user little if anything about the condition of the life-limiting positive electrode. Reference electrodes were found to be useful in laboratory studies of positive plate polarization and suggested the possible benefit of field studies. Several published papers have demonstrated their benefit in the understanding of previously incomprehensible voltage variations. In this paper field reference electrode readings, taken on float, are compared with the results of actual discharge capacity test information, to determine the utility of reference electrode readings in predicting the performance and life of reserve backup lead acid stationary batteries
{"title":"Reference Electrode Measurements, Field Experience, Use and Analysis","authors":"A. Cannone, W. Cantor, D. Feder","doi":"10.1109/INTLEC.2006.251633","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251633","url":null,"abstract":"For centuries, reference electrodes have been the tool of choice for laboratory electrochemists, in their attempts to obtain a more basic understanding of fundamental electrochemical processes. In the first half of the 20th century, lead antimony stationary batteries were in widespread use for reserve power back-up. Their life-limiting, progressively increasing antimony poisoning effect so dominated the electrochemical depolarization characteristics of these batteries as to allow simple cell voltage and specific gravity measurements to serve as suitable diagnostics of proper float and aging behavior, effectively obviating the need for reference electrode use. With the introduction of low corrosion, low float current, antimony-free lead electrode technology at mid-century, diagnostics became more complex. Individual cell float voltage and specific gravity became virtually meaningless as a diagnostic, useful only to detect shorted cells. Float voltage variations were dominated by the negative electrode, telling the user little if anything about the condition of the life-limiting positive electrode. Reference electrodes were found to be useful in laboratory studies of positive plate polarization and suggested the possible benefit of field studies. Several published papers have demonstrated their benefit in the understanding of previously incomprehensible voltage variations. In this paper field reference electrode readings, taken on float, are compared with the results of actual discharge capacity test information, to determine the utility of reference electrode readings in predicting the performance and life of reserve backup lead acid stationary batteries","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130894727","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251647
H. Al-Atrash, M. Pepper, I. Batarseh
This paper proposes an integrated single-stage three-port DC-DC converter. The proposed converter interfaces two bidirectional source/storage ports, and a galvanically isolated loading port. The power topology is based on the integration of a bi-phase boost pre-regulator stage into a phase-shift controlled full-bridge converter. The four bridge switches play the combined role of realizing synchronous boost conversion, and driving the transformer. The proposed topology is conditionally able to achieve zero-voltage switching of all bridge switches. Compared to the cascaded converter approach, this topology alleviates the cost overhead associated with introducing a switching leg for boost operation, and saves the switching loss it would exhibit. A constant-frequency switching scheme is adopted that presents two degrees of freedom necessary for proper control. The duty-cycle of the two phase-legs of the bridge is varied to control energy flow in the boost section, while the relative phase-shift between the legs is utilized to regulate the power pushed to the loading port. The operation of the topology is verified using an experimental 1 kW prototype, designed to handle a photovoltaic source, a storage battery bank, and a regulated DC load
{"title":"A Zero-Voltage Switching Three-Port Isolated Full-Bridge Converter","authors":"H. Al-Atrash, M. Pepper, I. Batarseh","doi":"10.1109/INTLEC.2006.251647","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251647","url":null,"abstract":"This paper proposes an integrated single-stage three-port DC-DC converter. The proposed converter interfaces two bidirectional source/storage ports, and a galvanically isolated loading port. The power topology is based on the integration of a bi-phase boost pre-regulator stage into a phase-shift controlled full-bridge converter. The four bridge switches play the combined role of realizing synchronous boost conversion, and driving the transformer. The proposed topology is conditionally able to achieve zero-voltage switching of all bridge switches. Compared to the cascaded converter approach, this topology alleviates the cost overhead associated with introducing a switching leg for boost operation, and saves the switching loss it would exhibit. A constant-frequency switching scheme is adopted that presents two degrees of freedom necessary for proper control. The duty-cycle of the two phase-legs of the bridge is varied to control energy flow in the boost section, while the relative phase-shift between the legs is utilized to regulate the power pushed to the loading port. The operation of the topology is verified using an experimental 1 kW prototype, designed to handle a photovoltaic source, a storage battery bank, and a regulated DC load","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130910074","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251582
O. Matsuo, H. Matsuo, M. Tuji, K. Kobayashi, Y. Sekine
A micro-fuel cell power supply system realizes an electronic ubiquitous society. Especially, the micro-fuel cell power supply is promoted to apply mobile systems such as small personal computer, cellular phone and so forth. In this case, it is attracted strongly to employ both of the micro-fuel cell and battery as the hybrid power supply system. This paper proposes a hybrid type DC-DC converter with new control strategy for the micro-fuel cell power supply system, and provides the operation principle, the experimental result and so forth. The new hybrid type DC-DC converter has a new output power compensation and new optimum operating point tracker using the microcomputer. As a result, the new hybrid type DC-DC converter can operate stably against the variation of power from the micro-fuel cell and the variation of the load current
{"title":"A Hybrid Type DC-DC Converter with New Control Strategy for a Micro-Fuel Cell Power Supply System","authors":"O. Matsuo, H. Matsuo, M. Tuji, K. Kobayashi, Y. Sekine","doi":"10.1109/INTLEC.2006.251582","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251582","url":null,"abstract":"A micro-fuel cell power supply system realizes an electronic ubiquitous society. Especially, the micro-fuel cell power supply is promoted to apply mobile systems such as small personal computer, cellular phone and so forth. In this case, it is attracted strongly to employ both of the micro-fuel cell and battery as the hybrid power supply system. This paper proposes a hybrid type DC-DC converter with new control strategy for the micro-fuel cell power supply system, and provides the operation principle, the experimental result and so forth. The new hybrid type DC-DC converter has a new output power compensation and new optimum operating point tracker using the microcomputer. As a result, the new hybrid type DC-DC converter can operate stably against the variation of power from the micro-fuel cell and the variation of the load current","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"449 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133964908","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251655
M.J. Ross, M. Durocher, T. Beaird
Vulnerability of remote terminal locations (such as huts, CEVs and cabinets) to power failures from increased demand, ice storms, hurricanes and grid malfunction has caused many Telcos to rethink their traditional approach to backup power in the network. One technology now being considered as potential replacement for traditional back-up battery power sources and portable generators is PEM fuel cells. Verizon has formed a cross functional team (CFT) to oversee fuel cell pilot trials in order to assess deployment of PEM fuel cells for backup power in outside plant. Verizon plans to issue an RFI in mid-2006, and to make recommendations regarding the potential of PEM technology. This paper will present trial results at the designated test sites, review test documentation developed in support of the trials, discuss operational considerations learned when deploying fuel cells, and identify next steps to be taken in order to deploy PEM fuel cells in the Verizon network
{"title":"Trial Assessment of PEM Fuel Cells for Backup Power in Telco Networks","authors":"M.J. Ross, M. Durocher, T. Beaird","doi":"10.1109/INTLEC.2006.251655","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251655","url":null,"abstract":"Vulnerability of remote terminal locations (such as huts, CEVs and cabinets) to power failures from increased demand, ice storms, hurricanes and grid malfunction has caused many Telcos to rethink their traditional approach to backup power in the network. One technology now being considered as potential replacement for traditional back-up battery power sources and portable generators is PEM fuel cells. Verizon has formed a cross functional team (CFT) to oversee fuel cell pilot trials in order to assess deployment of PEM fuel cells for backup power in outside plant. Verizon plans to issue an RFI in mid-2006, and to make recommendations regarding the potential of PEM technology. This paper will present trial results at the designated test sites, review test documentation developed in support of the trials, discuss operational considerations learned when deploying fuel cells, and identify next steps to be taken in order to deploy PEM fuel cells in the Verizon network","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115511640","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 : 2006-12-04DOI: 10.1109/INTLEC.2006.251672
F. Lee, Shuo Wang, Ming Xu, B. Lu, Chuanyun Wang, P. Kong
This paper first discussed the EMI issues and solutions for boost PFC converters. The parasitic cancellation technique is then introduced to improve EMI filter's high frequency performance. A two-stage PFC topology is introduced to improve the power density of PFC. LLC topology is recommended for front-end DC/DC converters due to it high efficiency. For onboard DC/DC converters, one-stage approach is first proposed. A self-driven full-bridge resonant circuit and a current tripler are introduced to improve the current density and switching frequencies. The paper also discussed the two-stage approach and intermediate bus architecture
{"title":"Optimized Design of Distributed Power Systems for High Efficiency, High Power Density and Low EMI Noise","authors":"F. Lee, Shuo Wang, Ming Xu, B. Lu, Chuanyun Wang, P. Kong","doi":"10.1109/INTLEC.2006.251672","DOIUrl":"https://doi.org/10.1109/INTLEC.2006.251672","url":null,"abstract":"This paper first discussed the EMI issues and solutions for boost PFC converters. The parasitic cancellation technique is then introduced to improve EMI filter's high frequency performance. A two-stage PFC topology is introduced to improve the power density of PFC. LLC topology is recommended for front-end DC/DC converters due to it high efficiency. For onboard DC/DC converters, one-stage approach is first proposed. A self-driven full-bridge resonant circuit and a current tripler are introduced to improve the current density and switching frequencies. The paper also discussed the two-stage approach and intermediate bus architecture","PeriodicalId":356699,"journal":{"name":"INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122444905","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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