2013 IEEE ECCE Asia Downunder最新文献_第2页

Analysis and design of Boost-LLC converter for high power density AC-DC adapter 高功率密度交直流适配器Boost-LLC变换器的分析与设计

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579066

Jun-Ho Kim, Moonsoo Kim, C. Yeon, G. Moon

引用次数: 25

Dynamic model and dynamic characteristics of solar cell 太阳能电池的动态模型及动态特性

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579170

Ling Qin, Shaojun Xie, Chen Yang, Jiankun Cao

引用次数: 22

Wireless power transmission using LC cancellation 无线电力传输采用LC对消

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579236

Y. Kawamura, M. Shoyama

{"title":"Wireless power transmission using LC cancellation","authors":"Y. Kawamura, M. Shoyama","doi":"10.1109/ECCE-ASIA.2013.6579236","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579236","url":null,"abstract":"In recent years, research on wireless power transmission technologies has been attracting more attention after MIT introduced the magnetic resonance technology in 2007. Wireless power transmission technology enables flexible comfortable supplying energy needs to electric devices. However, the wireless power transmission technologies that use the magnetic field resonance method have various problems. This method has been uniformly investigated from different directions. Therefore, it is difficult to understand the principle for such new technology phenomenon. Much of the research is often focused on the efficiency between resonators. Moreover, the relationship between the internal resistance and efficiency is not clear. Furthermore, the efficiency at high output power is not well understood. Practically, adding an internal resistance as an equivalent of both of rectifier and inverter losses is important for efficiency calculations. Even if the wireless power transmission has high efficiency, it is not suitable for practical use if the output power rating is very small. In this study, at first, the drawbacks of using the electromagnetic induction method for wireless power transmission are described in detail. Then, we indicate that we can increase the transmission power in accordance to the principles of the LC cancellation by using the resonance phenomenon even at a small coupling coefficient. After that, the difference between the overall efficiency considered of entire system and the transmission efficiency between the resonators is clearly distinguished. Then a theoretical formula has been developed for the overall efficiency and the output power in terms of the characteristic impedance. Finally, the theoretical results are compared with the experimental results and discusses in detail.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"30 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129630461","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

Current control based on zero-placement strategy for grid-connected LCL-filtered inverters 基于置零策略的并网lcl滤波逆变器电流控制

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579254

Jinming Xu, Shaojun Xie

引用次数: 4

Design of flux-switching hybrid excitation machine with bypass-bridges 带旁路桥的磁通开关混合励磁机的设计

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579169

Zegang Xu, Shaojun Xie, Jiankun Cao

引用次数: 1

A parallel-series connected four-transformer half bridge DC-DC converter for electric vehicle application 一种用于电动汽车的并联串联四变压器半桥DC-DC变换器

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579179

SeungWoon Lee, Je-Hyun Yi, Woosup Kim, B. Cho

引用次数: 1

A new virtual-flux-vector based droop control strategy for parallel connected inverters in microgrids 基于虚拟磁通矢量的微电网并网逆变器下垂控制新策略

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579157

Jiefeng Hu, Jianguo Zhu, Y. Qu, J. Guerrero

{"title":"A new virtual-flux-vector based droop control strategy for parallel connected inverters in microgrids","authors":"Jiefeng Hu, Jianguo Zhu, Y. Qu, J. Guerrero","doi":"10.1109/ECCE-ASIA.2013.6579157","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579157","url":null,"abstract":"Voltage and frequency droop method is commonly used in microgrids to achieve proper autonomous power sharing without control wire interconnections. This paper proposes a new control strategy for parallel connected inverters in microgrid applications by drooping the flux instead of the inverter output voltage. Firstly, the relation between the inverter flux and the active and reactive powers is mathematically obtained. Secondly, a novel flux droop method is then developed in order to regulate active and reactive powers by drooping the flux amplitude and the phase angle, respectively. In addition, a small-signal model is developed in order to design the main control parameters and study the system dynamics and stability. The proposed control scheme includes a direct flux control (DFC) algorithm, which avoids the use of PI controllers and PWM modulators. The obtained results shows that the proposed flux droop strategy can achieve active and reactive power sharing with much lower frequency deviation and better transient performance than the conventional voltage droop method, thus highlighting the potential use in microgrid applications.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114809009","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: 15

Consideration about novel cell voltage equalization circuit for battery / EDLC 新型电池/ EDLC电池电压均衡电路的思考

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579205

Daiki Satou, N. Hoshi, J. Haruna

{"title":"Consideration about novel cell voltage equalization circuit for battery / EDLC","authors":"Daiki Satou, N. Hoshi, J. Haruna","doi":"10.1109/ECCE-ASIA.2013.6579205","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579205","url":null,"abstract":"When using lithium-ion batteries or electric double-layer capacitors (EDLCs) as a storage module for electric vehicles, the cells of those storage devices are often connected in series. When a number of cells of the storage devices are connected in series, the cell voltage imbalance occurs by individual specificity such as the capacity, the rate of self-discharge, internal impedance, and temperature. In the state of the cell voltage imbalance, the amount of available electrical energy of total cells is decreased. Therefore, cell voltage equalization circuit is essential in order to derive maximum performance of lithium-ion battery or EDLC. This paper proposed the novel cell voltage equalization circuit for battery and EDLC. The proposed circuit not uses resistors; thus, the efficiency of the cell voltage equalizing operation can be improved. In addition, only one inductor and sensor are used in this circuit. Therefore, the cost of circuit can be reduced. Moreover, it can limit the current value of each battery cell in the voltage equalizing operation by use of only one current sensor. This paper explained the operation scheme, and conducted the characteristics comparison with the conventional circuits. Moreover, the effectiveness of this circuit was examined in simulation and experiment. The experiment was conducted using the three and eight EDLC cells (1.5F); and each cell voltage was equalized within finite time. In addition, the standard deviation of each cell voltage was reduced to a sufficient low value below 10mV after finite time. Therefore, the each cell was equalized in sufficient i.e. the effectiveness of the proposed circuit was shown.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125698033","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: 6

Comparison of two advanced modulation strategies for a hybrid cascaded converter 混合级联变换器两种高级调制策略的比较

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579283

G. Adam, I. Abdelsalam, S. Finney, D. Holliday, B. Williams, J. Fletcher

{"title":"Comparison of two advanced modulation strategies for a hybrid cascaded converter","authors":"G. Adam, I. Abdelsalam, S. Finney, D. Holliday, B. Williams, J. Fletcher","doi":"10.1109/ECCE-ASIA.2013.6579283","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579283","url":null,"abstract":"This paper summarises an investigation into two modulation strategies that enable a hybrid cascaded multilevel converter to reduce on-state losses and extend the modulation index linear range independent of load power factor, and without capacitor voltage balancing problems. The first modulation strategy exploits unconventional triplen harmonics in combination with a hybrid modulation strategy to optimally reduce the number H-bridge cells required to minimize semiconductor losses, and improve capacitor voltage balancing of the H-bridge cells. The second modulation strategy is based on level-shifted multilevel carriers and exploits 3rd harmonic subtraction to modify the modulating signals in order to extend the regions around zero voltage crossing where cell capacitor voltage balancing can be achieved, with a minimum number of cells. It is shown that both modulation strategies overcome the traditional limitations of hybrid cascaded converter such as dependency of the capacitor voltage balancing on modulation index and load power factor. Also they extend the modulation linear range virtually up to 1.27 in real power applications. Simulation and experimental results at several operating points are used to substantiate the strategies presented in this paper.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121725568","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: 12

Conducted EMI from SiC BJT boost converter and its dependence on the output voltage, current, and heatsink connection 研究了SiC BJT升压变换器的电磁干扰及其与输出电压、电流和散热器连接的关系

2013 IEEE ECCE Asia Downunder Pub Date : 2013-06-03 DOI: 10.1109/ECCE-ASIA.2013.6579249

K. Kostov, J. Rąbkowski, H. Nee

{"title":"Conducted EMI from SiC BJT boost converter and its dependence on the output voltage, current, and heatsink connection","authors":"K. Kostov, J. Rąbkowski, H. Nee","doi":"10.1109/ECCE-ASIA.2013.6579249","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579249","url":null,"abstract":"In comparison to their Silicon (Si) counterparts, the Silicon Carbide (SiC) power transistors have lower on-state resistance and higher switching speed, power and temperature ratings. These advantages make it possible to build smaller, lighter and more efficient power converters. Unfortunately, all these benefits come at the price of higher conducted and radiated electromagnetic interference (EMI). This paper investigates the conducted disturbances from a 6 kW boost converter with SiC bipolar junction transistors (BJTs). The results show that the conducted emissions at the input of the converter are approximately proportional to the output voltage, but almost independent on the load current. The effect of the heatsink on the conducted EMI was studied as well. It was found that using separate heatsinks for the diode and the BJT did not affect the level of conducted emissions significantly, but the way of connecting the heatsink does. A floating heatsink is bad from an EMI point of view, and in many cases it may not be allowed for safety reasons. When the heatsink is grounded, alone or together with the negative terminal, the common-mode noise increases the EMI measured at the positive line and decreases the EMI on the negative line. However, this appears only in the lower frequency range. At higher frequencies, connecting the heatsink in any way is better than letting it float. Therefore, the best option is to connect the heatsink to the negative line of the boost converter, and if grounding is required, it may be grounded as well. This may not be possible in systems where the negative voltage bus is at non-zero potential.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130434290","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: 19