Pub Date : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055554
E. Shi, Erik Centeno, Rafael R. Figueroa, Cheng Qi, G. Durgin
In Space Solar Power (SSP), a satellite collects and transmits solar energy to a terrestrial station via a 5.8 GHz microwave signal. The ground station rectifies this power to direct current, providing sustainable power to an energy grid. The main implementation barrier for SSP is cost. This paper investigates plain silica glass as a low cost and transparent alternative ground station substrate. Transparency allows for simultaneous use of the land for supplemental economic activities like agriculture that can offset the overall cost. Glass along with adhesive copper foil and discrete components are used to construct a rectifying antenna circuit with up to 7.4 % efficiency for use in a SSP ground station implementation.
{"title":"A Rectenna Using Copper Foil on Glass to Reduce Cost of Space Solar Power","authors":"E. Shi, Erik Centeno, Rafael R. Figueroa, Cheng Qi, G. Durgin","doi":"10.1109/WPTC45513.2019.9055554","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055554","url":null,"abstract":"In Space Solar Power (SSP), a satellite collects and transmits solar energy to a terrestrial station via a 5.8 GHz microwave signal. The ground station rectifies this power to direct current, providing sustainable power to an energy grid. The main implementation barrier for SSP is cost. This paper investigates plain silica glass as a low cost and transparent alternative ground station substrate. Transparency allows for simultaneous use of the land for supplemental economic activities like agriculture that can offset the overall cost. Glass along with adhesive copper foil and discrete components are used to construct a rectifying antenna circuit with up to 7.4 % efficiency for use in a SSP ground station implementation.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125445443","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055643
M. Elkayam, Yotam B. Frechter, Idan Sassonker, A. Kuperman
In contactless electromagnetic levitation technology, one of the main challenges is that the amount of power delivered to the load depends significantly on parameters of the transformer and therefore is very sensitive to system impedance variations. In this paper, a systematic design procedure based on virtual impedance control strategy is proposed to obtain high transfer efficiency and achieve maximum power transfer. A contactless electromagnetic levitation melting system was used to validate the proposed method. Both theoretical analysis and simulation results indicate the effectiveness of the proposed structure.
{"title":"Virtual Impedance Control for Efficient Power Transfer in Electromagnetic Levitation Melting System","authors":"M. Elkayam, Yotam B. Frechter, Idan Sassonker, A. Kuperman","doi":"10.1109/WPTC45513.2019.9055643","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055643","url":null,"abstract":"In contactless electromagnetic levitation technology, one of the main challenges is that the amount of power delivered to the load depends significantly on parameters of the transformer and therefore is very sensitive to system impedance variations. In this paper, a systematic design procedure based on virtual impedance control strategy is proposed to obtain high transfer efficiency and achieve maximum power transfer. A contactless electromagnetic levitation melting system was used to validate the proposed method. Both theoretical analysis and simulation results indicate the effectiveness of the proposed structure.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130470682","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055639
Junghoon Kim, B. Clerckx, P. Mitcheson
We build a realistic Simultaneous Wireless Information and Power Transfer (SWIPT) prototype and experimentally analyse the harvested energy and throughput trade-off. Both time-switching and power splitting receiver architectures are implemented, and the performance comparison is carried out. Systematic SWIPT transmission signal design methods are also considered and implemented on the prototype. The harvested energy-throughput (E-T) performance with different transmission signal designs, modulation schemes, and receiver architectures are evaluated and compared. The combination of the power splitting receiver architecture and the superposition transmission signal design technique shows significant expansion of the E-T region. The experimental results fully validate the observations predicted from the theoretical signal designs and confirm the benefits of systematic signal designs on the system performance. The observations give important insights on how to design a practical SWIPT system.
{"title":"Experimental Analysis of Harvested Energy and Throughput Trade-off in a Realistic SWIPT System","authors":"Junghoon Kim, B. Clerckx, P. Mitcheson","doi":"10.1109/WPTC45513.2019.9055639","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055639","url":null,"abstract":"We build a realistic Simultaneous Wireless Information and Power Transfer (SWIPT) prototype and experimentally analyse the harvested energy and throughput trade-off. Both time-switching and power splitting receiver architectures are implemented, and the performance comparison is carried out. Systematic SWIPT transmission signal design methods are also considered and implemented on the prototype. The harvested energy-throughput (E-T) performance with different transmission signal designs, modulation schemes, and receiver architectures are evaluated and compared. The combination of the power splitting receiver architecture and the superposition transmission signal design technique shows significant expansion of the E-T region. The experimental results fully validate the observations predicted from the theoretical signal designs and confirm the benefits of systematic signal designs on the system performance. The observations give important insights on how to design a practical SWIPT system.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130310363","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055634
D. Masotti, M. Shanawani, A. Costanzo
This paper offers a computationally efficient strategy for the delicate analysis of frequency-diverse arrays. This family of radiating systems shows a radiation mechanism dependent on both angle and range thanks to the different frequency radiated by each array element: for this reason, it can simultaneously focus and steer its beam, thus providing a strategic capability for wireless power transfer applications. Despite the array architecture described in this paper is the standard one, it represents a cumbersome task from the circuit analysis point of view. The full-wave analysis combined with an effective exploitation of the Harmonic Balance technique allows, for the first time, the accurate estimation of the dynamic behavior of this promising radiating system.
{"title":"Energy Focusing through Layout-based Frequency-Diverse Arrays","authors":"D. Masotti, M. Shanawani, A. Costanzo","doi":"10.1109/WPTC45513.2019.9055634","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055634","url":null,"abstract":"This paper offers a computationally efficient strategy for the delicate analysis of frequency-diverse arrays. This family of radiating systems shows a radiation mechanism dependent on both angle and range thanks to the different frequency radiated by each array element: for this reason, it can simultaneously focus and steer its beam, thus providing a strategic capability for wireless power transfer applications. Despite the array architecture described in this paper is the standard one, it represents a cumbersome task from the circuit analysis point of view. The full-wave analysis combined with an effective exploitation of the Harmonic Balance technique allows, for the first time, the accurate estimation of the dynamic behavior of this promising radiating system.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130843900","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055701
Jianchao Li, Liming Wang, F. Yin
A serials PCB coil matrix for UAV wireless charging that can operate effectively under misalignment condition was proposed. The simulation model taking into account the mutual inductance change was built and the impedance characteristic of coil was studied by simulation under different misalignment conditions. Based on dynamic impedance method, the transmission characteristics under different misalignment condition was also studied. The system with transmitting (TX) coil matrix at 3×3 and 4×4, which allowed for 6 cm and 8 cm deviation separately, was compared to analyze the size-match influence between TX and receiving (RX) coils. According to the characteristics of the coil matrix, a ferrite matrix that saves material and improved structure strength was proposed. This new structure was proved a better performance than a full ferrite plate. A final 4×4 matrix PCB coil prototype were made and the experiment verified the design that at different misalignment condition, 31.5 W to 62.7 W wireless charging power was presented.
提出了一种可在不对准条件下有效工作的无人机无线充电用串行PCB线圈矩阵。建立了考虑互感变化的仿真模型，仿真研究了不同不对中条件下线圈的阻抗特性。基于动态阻抗法，研究了不同不对准条件下的传输特性。将发送(TX)线圈矩阵分别为3×3和4×4，允许偏差分别为6cm和8cm的系统进行比较，分析了发送(TX)线圈和接收(RX)线圈尺寸匹配的影响。根据线圈基体的特点，提出了一种节省材料、提高结构强度的铁氧体基体。实验证明，这种新结构比全铁氧体板具有更好的性能。最终制作了4×4矩阵PCB线圈原型，并通过实验验证了该设计，在不同的不对中条件下，可获得31.5 W ~ 62.7 W的无线充电功率。
{"title":"Study on Series Printed-Circuit-Board Coil Matrix for Misalignment-Insensitive Wireless Charging","authors":"Jianchao Li, Liming Wang, F. Yin","doi":"10.1109/WPTC45513.2019.9055701","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055701","url":null,"abstract":"A serials PCB coil matrix for UAV wireless charging that can operate effectively under misalignment condition was proposed. The simulation model taking into account the mutual inductance change was built and the impedance characteristic of coil was studied by simulation under different misalignment conditions. Based on dynamic impedance method, the transmission characteristics under different misalignment condition was also studied. The system with transmitting (TX) coil matrix at 3×3 and 4×4, which allowed for 6 cm and 8 cm deviation separately, was compared to analyze the size-match influence between TX and receiving (RX) coils. According to the characteristics of the coil matrix, a ferrite matrix that saves material and improved structure strength was proposed. This new structure was proved a better performance than a full ferrite plate. A final 4×4 matrix PCB coil prototype were made and the experiment verified the design that at different misalignment condition, 31.5 W to 62.7 W wireless charging power was presented.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127383947","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055536
O. Dardeer, H. Elsadek, E. Abdallah, H. Elhennawy
This paper presents a 2×2 planar circularly polarized (CP) antenna array for RF energy harvesting in IoT system applications. The single element is a slot antenna with coplanar waveguide (CPW) feed line. It consists of a main slot radiator, a grounded-L strip, a stepped impedance matching stub, two chamfered corners, and an asymmetric U-shaped strip acting as a perturbed element. A voltage doubler rectifier is designed and assembled with the slot antenna to complete a rectenna structure. Then, the 2×2 planar antenna array is designed based on the CPW feed antenna element. The array is fed by a corporate feeding network with equal phase feeding behaviour and all the elements are oriented to the same direction. A microstrip to CPW transition by via holes is used for connecting the microstrip Wilkinson power divider to CPW feed antenna elements. A prototype of the proposed array is fabricated and measured. Good agreement is obtained between measured and simulated reflection coefficients. Front and back radiation is noticed and two main lobes at 0° and 180° are depicted. The array axial ratio bandwidth (ARBW), for AR < 3 dB, is about 180 MHz. The gain, directivity, and radiation efficiency of the array are 6.605 dBi, 9.604 dBi, and 50.12 %, respectively at 2.45 GHz. The RF power received by the proposed array is about −9.37 dBm at 2.445 GHz which greatly exceeds the single element harvested power.
{"title":"2×2 Circularly Polarized Antenna Array with Equal Phases for RF Energy Harvesting in IoT System","authors":"O. Dardeer, H. Elsadek, E. Abdallah, H. Elhennawy","doi":"10.1109/WPTC45513.2019.9055536","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055536","url":null,"abstract":"This paper presents a 2×2 planar circularly polarized (CP) antenna array for RF energy harvesting in IoT system applications. The single element is a slot antenna with coplanar waveguide (CPW) feed line. It consists of a main slot radiator, a grounded-L strip, a stepped impedance matching stub, two chamfered corners, and an asymmetric U-shaped strip acting as a perturbed element. A voltage doubler rectifier is designed and assembled with the slot antenna to complete a rectenna structure. Then, the 2×2 planar antenna array is designed based on the CPW feed antenna element. The array is fed by a corporate feeding network with equal phase feeding behaviour and all the elements are oriented to the same direction. A microstrip to CPW transition by via holes is used for connecting the microstrip Wilkinson power divider to CPW feed antenna elements. A prototype of the proposed array is fabricated and measured. Good agreement is obtained between measured and simulated reflection coefficients. Front and back radiation is noticed and two main lobes at 0° and 180° are depicted. The array axial ratio bandwidth (ARBW), for AR < 3 dB, is about 180 MHz. The gain, directivity, and radiation efficiency of the array are 6.605 dBi, 9.604 dBi, and 50.12 %, respectively at 2.45 GHz. The RF power received by the proposed array is about −9.37 dBm at 2.445 GHz which greatly exceeds the single element harvested power.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134509720","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055652
Hao-Jiun Wu, Po-Ming Wang, Tzuen-Hsi Huang, Sheng-Fan Yang
This paper shows the operation of honeycomb-shaped inductors with or without micro-electromechanical systems (MEMS) post-process in Ku-band and their application to VCOs in terms of circuit performances like crosstalk and injection pulling effects. The unique layout pattern of honeycomb-shaped inductor can provide almost omnidirectional electromagnetic interference (EMI) suppression to adjacent noise interferes. In this work, MEMS process is adopted to remove the silicon substrate for improving the inductor quality factor. The honeycomb-shaped inductors either with or without MEMS postprocess and the single-turn octagonal inductor are implemented to Ku-band VCOs operated at 17 GHz, respectively, with the same dc power consumption of 5.29 mW at VDD = 1.8 V, as an experimental set for comparison. The experiment results indicate that the honeycomb-shaped inductor exhibits better injection pulling mitigation than the single-turn octagonal inductor by more than 15 dB. This feature would be helpful to the design of wireless-powered sensor integrated circuits (ICs) with more EMI suppression capability in 5G communication environment.
{"title":"EMI Suppression of MEMS Honeycomb-Shaped Inductor on Oscillators for Wireless-Powered IC Design","authors":"Hao-Jiun Wu, Po-Ming Wang, Tzuen-Hsi Huang, Sheng-Fan Yang","doi":"10.1109/WPTC45513.2019.9055652","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055652","url":null,"abstract":"This paper shows the operation of honeycomb-shaped inductors with or without micro-electromechanical systems (MEMS) post-process in Ku-band and their application to VCOs in terms of circuit performances like crosstalk and injection pulling effects. The unique layout pattern of honeycomb-shaped inductor can provide almost omnidirectional electromagnetic interference (EMI) suppression to adjacent noise interferes. In this work, MEMS process is adopted to remove the silicon substrate for improving the inductor quality factor. The honeycomb-shaped inductors either with or without MEMS postprocess and the single-turn octagonal inductor are implemented to Ku-band VCOs operated at 17 GHz, respectively, with the same dc power consumption of 5.29 mW at VDD = 1.8 V, as an experimental set for comparison. The experiment results indicate that the honeycomb-shaped inductor exhibits better injection pulling mitigation than the single-turn octagonal inductor by more than 15 dB. This feature would be helpful to the design of wireless-powered sensor integrated circuits (ICs) with more EMI suppression capability in 5G communication environment.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134553002","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055617
N. Kim, Dae-Geun Yang, Ju Yong Lee, D. Cho
In this paper, a method for simultaneously transmitting power and information using subcarrier allocation is proposed. The proposed scheme allocates the specific subcarriers which transmit power signals having a large energy in the orthogonal frequency division multiplexing system. Therefore, information signals can be loaded on subcarriers except power transmission subcarriers, so that information and power can be simultaneously transmitted in the same time and frequency domain. Because the transmitted power signals are located at specific subcarriers and have a constant power, the power signals can be used as pilot signals which supports a function such as channel estimation. To verify the performance of proposed scheme, we implemented a power transfer system with multiple RF antennas and a rectenna, and made an information transfer system using software defined radio equipment and Gnuradio software. Then, we confirmed the possibility of simultaneous transmission of information and power through the implemented test system.
{"title":"Power Allocation Method using Pilot Signal for Simultaneous Transmission of Power and Information","authors":"N. Kim, Dae-Geun Yang, Ju Yong Lee, D. Cho","doi":"10.1109/WPTC45513.2019.9055617","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055617","url":null,"abstract":"In this paper, a method for simultaneously transmitting power and information using subcarrier allocation is proposed. The proposed scheme allocates the specific subcarriers which transmit power signals having a large energy in the orthogonal frequency division multiplexing system. Therefore, information signals can be loaded on subcarriers except power transmission subcarriers, so that information and power can be simultaneously transmitted in the same time and frequency domain. Because the transmitted power signals are located at specific subcarriers and have a constant power, the power signals can be used as pilot signals which supports a function such as channel estimation. To verify the performance of proposed scheme, we implemented a power transfer system with multiple RF antennas and a rectenna, and made an information transfer system using software defined radio equipment and Gnuradio software. Then, we confirmed the possibility of simultaneous transmission of information and power through the implemented test system.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133013210","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055704
Tom van Nunen, Esmee Huismans, R. Mestrom, M. Bentum, H. Visser
To perform biomedical Wireless Power Transfer experiments at UHF and microwave frequencies, a need exists for recipes and procedures to construct human tissue mimicking phantoms. This paper outlines the procedure for realizing body-mimicking phantoms and provides some recipes based on demineralized water, sugar (sucrose) and salt (NaCl). Even without using preservatives all samples made for this research maintained the dielectric characteristics for at least ten days when stored at room temperature. A procedure to construct a low-cost RG405 semi-rigid coaxial waveguide-based measurement probe and calibration method are discussed as well. The absolute error in obtained relative permittivity, using this probe, relative to using a Commercially Off The Shelf probe is less than 2.0.
{"title":"DIY Electromagnetic Phantoms for Biomedical Wireless Power Transfer Experiments","authors":"Tom van Nunen, Esmee Huismans, R. Mestrom, M. Bentum, H. Visser","doi":"10.1109/WPTC45513.2019.9055704","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055704","url":null,"abstract":"To perform biomedical Wireless Power Transfer experiments at UHF and microwave frequencies, a need exists for recipes and procedures to construct human tissue mimicking phantoms. This paper outlines the procedure for realizing body-mimicking phantoms and provides some recipes based on demineralized water, sugar (sucrose) and salt (NaCl). Even without using preservatives all samples made for this research maintained the dielectric characteristics for at least ten days when stored at room temperature. A procedure to construct a low-cost RG405 semi-rigid coaxial waveguide-based measurement probe and calibration method are discussed as well. The absolute error in obtained relative permittivity, using this probe, relative to using a Commercially Off The Shelf probe is less than 2.0.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128296179","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055682
C. Roth, D. Gerling
In this paper a novel model for calculation of losses in bunched litz wires is proposed. Since the model is based on analytical equations, the calculation effort is low compared to pure numerical methods. Therefore it can be used to calculate the circulating currents and losses in litz wires with a high number of single strands. Although the basic model can be used for arbitrary twisting schemes, this work focuses on bunched litz wires since this is the most common type in practice. The model is validated by different measurements. Results show that the model is sufficiently accurate to predict losses for different litz wire configurations.
{"title":"Novel Calculation Model for Bunched Litz Wires","authors":"C. Roth, D. Gerling","doi":"10.1109/WPTC45513.2019.9055682","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055682","url":null,"abstract":"In this paper a novel model for calculation of losses in bunched litz wires is proposed. Since the model is based on analytical equations, the calculation effort is low compared to pure numerical methods. Therefore it can be used to calculate the circulating currents and losses in litz wires with a high number of single strands. Although the basic model can be used for arbitrary twisting schemes, this work focuses on bunched litz wires since this is the most common type in practice. The model is validated by different measurements. Results show that the model is sufficiently accurate to predict losses for different litz wire configurations.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128404194","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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