Wireless Power Transfer最新文献_第3页

The application of GHz band charge pump rectifier and rectenna array for satellite internal wireless system GHz频段电荷泵整流器和矩形天线阵列在卫星内部无线系统中的应用

IF 4.2

Wireless Power Transfer Pub Date : 2019-09-01 DOI: 10.1017/wpt.2019.13

Ce Wang, Bo Yang, S. Kojima, N. Shinohara

引用次数: 3

The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems 旋转线圈错位对电感功率传输系统传输参数的影响

IF 4.2

Wireless Power Transfer Pub Date : 2019-06-07 DOI: 10.1017/wpt.2019.7

F. Niedermeier, Marius Hassler, J. Krammer, B. Schmuelling

引用次数: 2

Design of a wireless power transfer system for assisted living applications 用于辅助生活应用的无线电力传输系统的设计

IF 4.2

Wireless Power Transfer Pub Date : 2019-03-01 DOI: 10.1017/WPT.2019.2

Qassim Abdullahi, Rahil Joshi, S. Podilchak, Sadeque Reza Khan, Meixuan Chen, Jean Rooney, Jean Rooney, Danmei Sun, M. Desmulliez, A. Georgiadis, D. Anagnostou

{"title":"Design of a wireless power transfer system for assisted living applications","authors":"Qassim Abdullahi, Rahil Joshi, S. Podilchak, Sadeque Reza Khan, Meixuan Chen, Jean Rooney, Jean Rooney, Danmei Sun, M. Desmulliez, A. Georgiadis, D. Anagnostou","doi":"10.1017/WPT.2019.2","DOIUrl":"https://doi.org/10.1017/WPT.2019.2","url":null,"abstract":"Advances in material science and semiconductor technology have enabled a variety of inventions to be implemented in electronic systems and devices used in the medical, telecommunications, and consumer electronics sectors. In this paper, a wireless charging system is described as a wearable body heater that uses a chair as a transmitter (Tx). This system incorporates the widely accepted Qi wireless charging standard. Alignment conditions of a linear three-element coil arrangement and a 3 × 3 coil matrix array are investigated using voltage induced in a coil as a performance indicator. The efficiency obtained is demonstrated to be up to 80% for a voltage of over 6.5 Volts and a power transfer of over 5 Watts. Our results and proposed approach can be useful for many applications. This is because the wireless charging system described herein can help design seating areas for the elderly and disabled, commercial systems, consumer electronics, medical devices, electronic textiles (e-textiles), and other electronic systems and devices.","PeriodicalId":43105,"journal":{"name":"Wireless Power Transfer","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/WPT.2019.2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47983688","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: 11

A 3D wireless charging cube with externally enhanced magnetic field for extended range of wireless power transfer 一种具有外部增强磁场的3D无线充电立方体，可扩展无线电力传输范围

IF 4.2

Wireless Power Transfer Pub Date : 2019-03-01 DOI: 10.1017/WPT.2019.4

Qi Zhu, Hua Han, M. Su, A. Hu

{"title":"A 3D wireless charging cube with externally enhanced magnetic field for extended range of wireless power transfer","authors":"Qi Zhu, Hua Han, M. Su, A. Hu","doi":"10.1017/WPT.2019.4","DOIUrl":"https://doi.org/10.1017/WPT.2019.4","url":null,"abstract":"More mobile devices such as mobile phones and robots are wirelessly charged for convenience, simplicity, and safety, and it would be desirable to achieve three-dimensional (3D) wireless charging with high spatial freedom and long range. This paper proposes a 3D wireless charging cube with three orthogonal coils and supporting magnetic cores to enhance the magnetic flux outside the cube. The proposed system is simulated by Ansoft Maxwell and implemented by a downsized prototype. Both simulation and experimental results show that the magnetic cores can strengthen the magnitude of B-field outside the cube. The final prototype demonstrates that the power transfer distance outside the cube for getting the same induced electromotive force in the receiver coil is extended approximately by 50 mm using magnetic cores with a permeability of 2800. It is found that the magnitude of B-field outside the cube can be increased by increasing the width and the permeability of the magnetic cores. The measured results show that when the permeability of the magnetic cores is fixed, the induced electromotive force in the receiver coil at a point 300 mm away from the center of the cube is increased by about 2V when the width of the magnetic cores is increased from 50 to 100 mm. The increase in the induced electromotive force at an extended point implies a greater potential of wireless power transfer capability to the power pickup.","PeriodicalId":43105,"journal":{"name":"Wireless Power Transfer","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/WPT.2019.4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48806605","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: 4

Characterization of carbon-composite antennas for wireless charging 无线充电用碳复合材料天线的特性研究

IF 4.2

Wireless Power Transfer Pub Date : 2019-03-01 DOI: 10.1017/WPT.2018.5

Lucas Anthony Ciccarelli, C. Breckenfelder, C. Greb

引用次数: 1

RF-DC conversion efficiency improvement for microwave transmission with pulse modulation 提高脉冲调制微波传输的RF-DC转换效率

IF 4.2

Wireless Power Transfer Pub Date : 2019-03-01 DOI: 10.1017/WPT.2019.3

Takashi Hirakawa, Ce Wang, N. Shinohara

{"title":"RF-DC conversion efficiency improvement for microwave transmission with pulse modulation","authors":"Takashi Hirakawa, Ce Wang, N. Shinohara","doi":"10.1017/WPT.2019.3","DOIUrl":"https://doi.org/10.1017/WPT.2019.3","url":null,"abstract":"Microwave power transfer (MPT) can solve certain types of problems. For example, Internet of Things requires a flexible configuration of sensor networks, which is hindered by wired-charging sensors. This problem can be overcome by MPT techniques. However, the transmission efficiency of MPT is lower than that of wired transmission. This study focuses on the operation of rectifiers having a pulse-modulated input signal. Although a pulse-modulated wave is effective for improving the RF-DC conversion efficiency, the output voltage waves of rectifiers have a high ripple content. Moreover, the harmonic balance method cannot be used to simulate the operation of a pulse-modulated rectifier. To reduce the ripple content, a smoothing capacitor should be connected in parallel to an output load. We investigated the influence of a smoothing capacitor, the general characteristics of rectifiers under pulse-modulated waves, and the effectiveness of using pulse-modulated waves for improving RF-DC conversion efficiency. In conclusion, we reveal a necessary condition of the smoothing capacitor for improvement, demonstrate the effectiveness of pulse modulation, and show that the optimum impedance with a pulse-modulated wave input is an inverse of duty ratio times as compared to that with continuous wave input.","PeriodicalId":43105,"journal":{"name":"Wireless Power Transfer","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/WPT.2019.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46054045","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: 7

A free-rotating ball-shaped transmitting coil with wireless power transfer system for robot joints 一种用于机器人关节的带有无线电力传输系统的自由旋转球形发射线圈

IF 4.2

Wireless Power Transfer Pub Date : 2019-03-01 DOI: 10.1017/WPT.2019.1

Yang Yang, Wenjie Chen, Liyu Dai, Rui Wang

{"title":"A free-rotating ball-shaped transmitting coil with wireless power transfer system for robot joints","authors":"Yang Yang, Wenjie Chen, Liyu Dai, Rui Wang","doi":"10.1017/WPT.2019.1","DOIUrl":"https://doi.org/10.1017/WPT.2019.1","url":null,"abstract":"Wireless power transmission (WPT) systems with moveable mechanical parts have been acquired more and more attention during the past decade. However, due to the moveable feature of transmitting coil and receiving coil, misalignment issue lead to extra power loss, decrease in efficiency, increase in control complexity, and unwanted performance degradation of the whole system. Moreover, it happened frequently than those traditional planar coils systems. The motivation for this paper is trying to have a deep understanding of quantitative relationship between ball-shaped coils mutual inductance and misalignment. Based upon that, engineers would know more detail of the coils position and mutual inductance. So, optimized design might be achieved. On considering that, this paper presents a WPT system with a ball-shaped coil for robot joints. A mutual inductance calculation based on filament method aimed at ball-shaped coil is proposed. Based on these, nine different ball-shaped coil solutions are calculated. Then, model with a minimized change rate of mutual inductance against the angular misalignment is chosen as the optimized design. Circuit analysis of the WPT system with the series–series resonant topology is conducted to choose a proper working frequency and load. Finally, an experimental platform is established. It demonstrates the feasibility of the proposed calculation method and the feasibility of the WPT prototype.","PeriodicalId":43105,"journal":{"name":"Wireless Power Transfer","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/WPT.2019.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45471491","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: 1

Experimental demonstration of multi-watt wireless power transmission to ferrite-core receivers at 6.78 MHz 6.78 MHz频段铁氧体铁芯接收机多瓦无线电力传输的实验演示

IF 4.2

Wireless Power Transfer Pub Date : 2018-12-11 DOI: 10.1017/WPT.2018.6

S. Chyczewski, Seahee Hwangbo, Y. Yoon, D. Arnold

引用次数: 2

Compact and efficient WPT systems using half-ring resonators (HRRs) for powering electronic devices 紧凑和高效的WPT系统使用半环谐振器(hrr)为电子设备供电

IF 4.2

Wireless Power Transfer Pub Date : 2018-09-01 DOI: 10.1017/WPT.2018.4

H. Atallah

引用次数: 3

Effect of tuning capacitance of passive power repeaters on power transfer capability of inductive power transfer systems 无源功率中继器调谐电容对感应功率传输系统功率传输能力的影响

IF 4.2

Wireless Power Transfer Pub Date : 2018-08-06 DOI: 10.1017/WPT.2018.3

Rong Hua, A. Hu

{"title":"Effect of tuning capacitance of passive power repeaters on power transfer capability of inductive power transfer systems","authors":"Rong Hua, A. Hu","doi":"10.1017/WPT.2018.3","DOIUrl":"https://doi.org/10.1017/WPT.2018.3","url":null,"abstract":"Power repeaters are used to extend the power transfer range or enhance the power transfer capability of Inductive Power Transfer (IPT) systems, but how to tune the power repeaters to improve the system power transfer performance remains an unsolved problem. In this paper, studies of the effect of the tuning capacitance of the power repeater of an IPT system on the power transfer capability are presented. A theoretical model is established to analyze the output power of the system with the primary coil and secondary coil tuned at a nominal resonant frequency, and a passive power repeater placed in between. By analyzing the relationship between the tuning capacitance of the power repeater and the output power, a critical tuning capacitance which sets up the boundary between enhancing and reducing the output power is determined, and the optimal tuning capacitances corresponding to the maximum and minimum output power are also obtained. A practical IPT system with a passive power repeater placed at 40, 80, and 104 mm from the primary coil is built. It has shown that the practically measured critical capacitance and the optimal tuning capacitance for maximum power transfer are in good agreement with the analytical results.","PeriodicalId":43105,"journal":{"name":"Wireless Power Transfer","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/WPT.2018.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47554669","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: 1