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Analysis of a high step-up ratio flyback converter with active clamp and voltage multiplier 有源箝位加电压倍增器的高升压比反激变换器分析
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5617972
G. Spiazzi, P. Mattavelli, A. Costabeber
{"title":"Analysis of a high step-up ratio flyback converter with active clamp and voltage multiplier","authors":"G. Spiazzi, P. Mattavelli, A. Costabeber","doi":"10.1109/ECCE.2010.5617972","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5617972","url":null,"abstract":"In this paper, an isolated high step-up ratio dc-dc converter aimed to be used in interface systems between low voltage renewable energy sources, like photovoltaic panels and fuel-cells, and the utility grid is presented. The converter is based on the active clamp flyback topology with a voltage multiplier at the transformer secondary side. Such configuration, while naturally clamping the rectifier diode voltages thus avoiding the use of dissipative snubber circuits, allows to reduce the circulating current during the active clamp operation, thanks to the resonance involving the transformer leakage inductances and the diode parasitic capacitances. Experimental results taken from a 300W rated prototype are reported, showing a good agreement with the theoretical expectations.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882657","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}
引用次数: 3
Modeling the inter-electrode capacitances of Si CoolMOS transistors for circuit simulation of high efficiency power systems 用于高效电源系统电路仿真的Si CoolMOS晶体管电极间电容建模
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5618009
Nanying Yang, J. M. Ortiz, T. Duong, A. Hefner, K. Meehan, J. Lai
{"title":"Modeling the inter-electrode capacitances of Si CoolMOS transistors for circuit simulation of high efficiency power systems","authors":"Nanying Yang, J. M. Ortiz, T. Duong, A. Hefner, K. Meehan, J. Lai","doi":"10.1109/ECCE.2010.5618009","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5618009","url":null,"abstract":"The CoolMOS™+ transistor is a power MOSFET type device that utilizes a “super-junction” embedded within its drift region in order to improve the trade-off between on-resistance and breakdown voltage. The super-junction results in unique inter-electrode capacitance characteristics that require an advanced modeling approach to accurately represent switching performance. This paper describes a new compact circuit simulator model for the CoolMOS™ transistor and demonstrates the model performance using the Saber† simulator for a 650 V, 60 A device. The model is suitable for implementation in the Saber simulator that accurately describes all three inter-electrode capacitances (i.e., gate-drain, gate-source, and drain-source capacitances) for the full operating range of the device. The model is derived using the actual charge distribution within the device rather than assuming a lumped charge or one-dimensional charge distribution. Simulation results show excellent agreement with measurement results in contrast to previous modeling approaches used for this device. The compact model developed in this work is going to be utilized in the design of a high efficiency soft-switching inverter for electric vehicle motor drives and a high efficiency bidirectional DC-DC converter at zero-voltage switching (ZVS) operation.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129906500","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}
引用次数: 10
Analysis of an electromechanical battery for rural electrification in sub-Saharan Africa 撒哈拉以南非洲农村电气化用机电电池分析
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5617722
R. Okou, M. A. Khan, P. Barendse, B. Sebitosi, P. Pillay
{"title":"Analysis of an electromechanical battery for rural electrification in sub-Saharan Africa","authors":"R. Okou, M. A. Khan, P. Barendse, B. Sebitosi, P. Pillay","doi":"10.1109/ECCE.2010.5617722","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5617722","url":null,"abstract":"This paper presents the thermal and structural analysis of an electromechanical battery energy storage system designed to enhance rural electrification in sub-Saharan Africa. The system consists of a flywheel rotor, an electrical machine, bearings and a containment structure. The flywheel rotor was constructed from E-glass fiber, the machine from imported NdFeB magnets and commercial energy efficient bearings. With the exception of the power electronics and magnets, local materials were used for the manufacture of the flywheel system. The system was designed to operate between 8,000 rpm to 25,000 rpm with a rated storage capacity of 300Wh. Numerical stress analysis was performed during the design stage to ensure that the maximum tensile strength is not exceeded. A lumped parameter thermal model was used to estimate the temperature distribution to ensure safe operating conditions of the flywheel system and environment. The results of both analyses are presented.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128324333","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}
引用次数: 0
New method for current and voltage measuring offset correction in an induction motor sensorless drive 感应电机无传感器驱动中电流电压测量偏置校正的新方法
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5618152
Zeljko Pantic, S. Ballal, S. Lukic
{"title":"New method for current and voltage measuring offset correction in an induction motor sensorless drive","authors":"Zeljko Pantic, S. Ballal, S. Lukic","doi":"10.1109/ECCE.2010.5618152","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5618152","url":null,"abstract":"This paper presents a new algorithm for electromagnetic torque and flux estimation in a sensorless drive when uncompensated dc offset of current and/or voltage sensors are present. The novel feature of the offset error correction algorithm is an attempt not to eliminate the consequence of problem but to identify its source. The algorithm uses the first harmonic of estimated torque and dc value of estimated stator flux to identify the source and value of the current and/or voltage offset error. Identified values can be used for offset cancelation which improves estimation process.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128360986","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}
引用次数: 0
Implementation of a three-phase multilevel boosting inverter using switched-capacitor converter cells 使用开关电容变换器单元的三相多电平升压逆变器的实现
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5618271
A. Barnes, J. Balda
{"title":"Implementation of a three-phase multilevel boosting inverter using switched-capacitor converter cells","authors":"A. Barnes, J. Balda","doi":"10.1109/ECCE.2010.5618271","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5618271","url":null,"abstract":"Manufacturers of power electronic converters seek to increase not only power and voltage ratings but also power density. Inductorless converters help achieve the latter because capacitive energy storage has higher energy density than inductive energy storage. Multilevel topologies, which include some inductorless topologies, enable converters to operate at higher voltage levels by allowing voltage sharing between devices. This paper presents a novel multilevel inductorless boosting three-phase inverter that is constructed using a series configuration of switched-capacitor converter cells. This allows for the inverter to be used without an additional boost converter or output transformer when powered from a low-voltage dc source, such as the battery of a grid-connected energy storage system or an electric vehicle.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128450282","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}
引用次数: 5
Control of hybrid battery/ultra-capacitor energy storage for stand-alone photovoltaic system 独立光伏系统混合电池/超级电容器储能控制
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5618014
Xiong Liu, Peng Wang, P. Loh, F. Gao, F. Choo
{"title":"Control of hybrid battery/ultra-capacitor energy storage for stand-alone photovoltaic system","authors":"Xiong Liu, Peng Wang, P. Loh, F. Gao, F. Choo","doi":"10.1109/ECCE.2010.5618014","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5618014","url":null,"abstract":"Battery life is an important criterion in a stand-alone photovoltaic system operation due to intermittent characteristic of solar irradiation and demand. This paper presents a stand-alone photovoltaic system with Ni-MH battery and ultra-capacitor serving as its energy storage elements. A control strategy is proposed in this paper to reduce charging and discharging cycles and avoid deep discharges of battery. The battery converter is controlled in current mode to track a charging/discharging reference current which is given by energy management system, whereas the ultra-capacitor converter is controlled to corporate solar irradiation fluctuations, load spikes and variations to maintain a stable dc-link voltage. Isolated PV system with the proposed control schemes is created using MATLAB SIMULINK. An optimum performance is achieved to serve as both high power and high energy sources due to complementary characteristic of battery and ultra-capacitor.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128737075","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}
引用次数: 36
Development and validation of model for 95% efficiency, 220 W wireless power transfer over a 30cm air-gap 开发并验证了在30cm气隙内传输效率为95%、220 W无线电力的模型
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5617901
Seung-Hwan Lee, R. Lorenz
{"title":"Development and validation of model for 95% efficiency, 220 W wireless power transfer over a 30cm air-gap","authors":"Seung-Hwan Lee, R. Lorenz","doi":"10.1109/ECCE.2010.5617901","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5617901","url":null,"abstract":"Although 60W wireless power transfer was demonstrated in 2007, still there is no equivalent circuit model for a sub-meter air-gap, hundreds of Watts, high efficiency wireless system. A design-oriented circuit model is needed for this technology to evolve. This paper proposes an equivalent circuit model for the wireless system and analyzes the system based on the proposed model. The proposed model and its analysis are validated by means of FEA and experimental results. Furthermore, as a viable solution for high power (over 10kW) applications, losses in the wireless power transfer system are investigated in the following section. Because of the high operating frequency (MHz), skin- and proximity effect were shown to be dominant. New spatial layout of a coil is proposed that significantly reduces losses caused by skin- and proximity effect. Proposed coil design is evaluated by means of FEA.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129782775","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}
引用次数: 64
Power sequencing approach to fault isolation in dc systems: Influence of system parameters 直流系统故障隔离的功率排序方法:系统参数的影响
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5618075
P. Cairoli, R. Dougal, U. Ghisla, I. Kondratiev
{"title":"Power sequencing approach to fault isolation in dc systems: Influence of system parameters","authors":"P. Cairoli, R. Dougal, U. Ghisla, I. Kondratiev","doi":"10.1109/ECCE.2010.5618075","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5618075","url":null,"abstract":"We show that medium-voltage dc power buses can be protected against short circuit faults by coordinating the action of a converter that supplies power to the bus with the action of contactors that are used to reconfigure the bus connections. Following a fault, the bus is de-energized (so there is no large current to interrupt), one or more contactors are reconfigured, and the dc bus is then reenergized. For a typical industrial dc bus, we show that it is possible to execute this de-energize-reconfigure-re-energize process 10 times faster than an AC bus can be protected and reconfigured using traditional circuit breakers. We show how the de-energizing and reconfiguring times depend on the output capacitance of the main converter and on the distance to the fault, and we show how to size each hold-up capacitor so that loads on unfaulted circuits can ride through the process uninterrupted.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127432868","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}
引用次数: 35
Power SiC DMOSFET model accounting for JFET region nonuniform current distribution 考虑JFET区域非均匀电流分布的功率SiC DMOSFET模型
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5617830
Ruiyun Fu, A. Grekov, E. Santi, J. Hudgins, A. Mantooth
{"title":"Power SiC DMOSFET model accounting for JFET region nonuniform current distribution","authors":"Ruiyun Fu, A. Grekov, E. Santi, J. Hudgins, A. Mantooth","doi":"10.1109/ECCE.2010.5617830","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5617830","url":null,"abstract":"The main goal of this work is development of a new circuit-based SiC DMOSFET model which physically represents the mechanism of current saturation in power SiC DMOSFET. Finite element simulations show that current saturation for a typical device geometry is due to two-dimensional carrier distribution effects in the JFET region caused by the current spreading from the channel to the JFET region. For high drain-source voltages, most of the voltage-drop occurs in the current-spreading region located in the JFET region close to the channel.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125658973","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}
引用次数: 2
Malfunction mechanism of semiconductor circuit breaker in HVDC power supply system 高压直流供电系统中半导体断路器的故障机理
2010 IEEE Energy Conversion Congress and Exposition Pub Date : 2010-11-01 DOI: 10.1109/ECCE.2010.5617785
S. Abe, K. Fukushima, Sihun Yang, M. Ogawa, Kosuke Nomura, M. Shoyama, T. Ninomiya, A. Matsumoto, A. Fukui, M. Yamasaki
{"title":"Malfunction mechanism of semiconductor circuit breaker in HVDC power supply system","authors":"S. Abe, K. Fukushima, Sihun Yang, M. Ogawa, Kosuke Nomura, M. Shoyama, T. Ninomiya, A. Matsumoto, A. Fukui, M. Yamasaki","doi":"10.1109/ECCE.2010.5617785","DOIUrl":"https://doi.org/10.1109/ECCE.2010.5617785","url":null,"abstract":"This paper considers the malfunction mechanism of semiconductor circuit breaker in high voltage DC power supply system (HVDC). In HVDC system, the fast response breaker is required. Semiconductor circuit breaker is paid attention as one of the key technology in HVDC. However, in some condition, the semiconductor circuit is malfunctioned. When malfunction is happened, unexpected large current is flown to the other normal line. In this paper, the malfunction mechanism of semiconductor circuit breaker is considered. It demonstrated by using MATLAB/Simulink. Moreover, the demonstrated results are confirmed by experimentally.","PeriodicalId":161915,"journal":{"name":"2010 IEEE Energy Conversion Congress and Exposition","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576464","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}
引用次数: 0
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