Pub Date : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055610
A. Diet, M. Biancheri-Astier, Y. Bihan, Pablo Pérez-Nicoli, M. Bouklachi, O. Meyer, F. Silveira, L. Pichon
This paper focuses on the wireless powering of implanted medical devices (IMDs) thanks to the widely used technology NFC (Near Field Communications). This technology uses a magnetic coupling at 13.56 MHz. In this work, the IMD is represented by a titanium case with a coil wound around it. CST simulations and VNA measurements are performed with two titanium samples (grade 2, G2, and grade 5, G5) for evaluating the impact of the titanium case on the electrical parameters, mainly the impedance Z parameters matrix. The human body is modeled in simulation and represented in measurements thanks to a phantom. Evaluation of the Z parameters in simulation and measurements are shown in a first step and used in a second one for defining the efficiency reachable in our case of study. The efficiency is computed with simulated and measured results and allows to quantify the ability to consider the NFC link for powering. As the distance between transmitting and receiving coils is in the range of 50 mm, including a distance between reader and human tissue of 30 mm, the efficiency (custom) is in the range of 10 to 20% depending on the load impedance of the IMDs. This work shows a fruitful agreement between simulation and measurements for designing NFC link in the context of IMDs powering. Conclusions are given for improving this physical link by modifying the structure of the reader, and the definition of the efficiency given can be used as a fruitful figure of merit.
{"title":"13.56 MHz Near Field magnetic coupling efficiency evaluation for IMDs powering","authors":"A. Diet, M. Biancheri-Astier, Y. Bihan, Pablo Pérez-Nicoli, M. Bouklachi, O. Meyer, F. Silveira, L. Pichon","doi":"10.1109/WPTC45513.2019.9055610","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055610","url":null,"abstract":"This paper focuses on the wireless powering of implanted medical devices (IMDs) thanks to the widely used technology NFC (Near Field Communications). This technology uses a magnetic coupling at 13.56 MHz. In this work, the IMD is represented by a titanium case with a coil wound around it. CST simulations and VNA measurements are performed with two titanium samples (grade 2, G2, and grade 5, G5) for evaluating the impact of the titanium case on the electrical parameters, mainly the impedance Z parameters matrix. The human body is modeled in simulation and represented in measurements thanks to a phantom. Evaluation of the Z parameters in simulation and measurements are shown in a first step and used in a second one for defining the efficiency reachable in our case of study. The efficiency is computed with simulated and measured results and allows to quantify the ability to consider the NFC link for powering. As the distance between transmitting and receiving coils is in the range of 50 mm, including a distance between reader and human tissue of 30 mm, the efficiency (custom) is in the range of 10 to 20% depending on the load impedance of the IMDs. This work shows a fruitful agreement between simulation and measurements for designing NFC link in the context of IMDs powering. Conclusions are given for improving this physical link by modifying the structure of the reader, and the definition of the efficiency given can be used as a fruitful figure of merit.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"12 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":"122283147","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/WPTC45513.2019.9055702
Kamotesov Sergkei, P. Lombard, V. Semet, B. Allard, M. Moguedet, Michel Cabrera
Omni-directional inductive wireless power transfer to a movable target inside a half-meter cubic emitter box is studied. The innovative point is to use 3D Molded Interconnect Device (3D-MID) coils at the surface of the target with a 3D shape. Transmission of energy at 6.78 MHz is performed experimentally and characterized in terms of power and efficiency. The 3D design of the coils allows maintaining power when the receiver target is translated and rotated inside the emitter box (that is to say allows compensating to a certain extent the misalignment between the emitters and the receivers). A comparison with a simplified model is performed. Lastly, the potential of this technology is discussed.
{"title":"Omni-Directional Inductive Wireless Power Transfer with 3D MID inductors","authors":"Kamotesov Sergkei, P. Lombard, V. Semet, B. Allard, M. Moguedet, Michel Cabrera","doi":"10.1109/WPTC45513.2019.9055702","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055702","url":null,"abstract":"Omni-directional inductive wireless power transfer to a movable target inside a half-meter cubic emitter box is studied. The innovative point is to use 3D Molded Interconnect Device (3D-MID) coils at the surface of the target with a 3D shape. Transmission of energy at 6.78 MHz is performed experimentally and characterized in terms of power and efficiency. The 3D design of the coils allows maintaining power when the receiver target is translated and rotated inside the emitter box (that is to say allows compensating to a certain extent the misalignment between the emitters and the receivers). A comparison with a simplified model is performed. Lastly, the potential of this technology is discussed.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"531 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":"124510619","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/WPTC45513.2019.9055643
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/WPTC45513.2019.9055553
Maryam Heidarian, S. Burgess, R. Prabhu, Nazila Fough
Maximising power transfer efficiency (PTE) in resonant inductive power transfer (IPT) systems requires strong coupling between transmitter and receiver coils. In applications where system constraints yield a weak inductive link (e.g.: significant distance between coils.) or there is a requirement for a specific power level, then geometrically optimising the coils can enhance inductive linkage. To achieve this, a novel coil design method has been presented which provides maximum efficiency for both strongly- and loosely-coupled inductive links. A parameter (i.e.: Strong Coupling Factor.) has been introduced to assist the design procedure. Discussed results from a practical 1.06 MHz inductive link, developed using the proposed design method, show that with proper selection of strong coupling factor $(mathrm{e}.mathrm{g}.: mathrm{C}=220.)$ the designed coil geometry can provide maximum PTE of 86 %, which is in close correlation (F $approx$ 3 %) with theoretical analysis using MATLAB.
{"title":"Maximising Inductive Power Transmission using a Novel Analytical Coil Design Approach","authors":"Maryam Heidarian, S. Burgess, R. Prabhu, Nazila Fough","doi":"10.1109/WPTC45513.2019.9055553","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055553","url":null,"abstract":"Maximising power transfer efficiency (PTE) in resonant inductive power transfer (IPT) systems requires strong coupling between transmitter and receiver coils. In applications where system constraints yield a weak inductive link (e.g.: significant distance between coils.) or there is a requirement for a specific power level, then geometrically optimising the coils can enhance inductive linkage. To achieve this, a novel coil design method has been presented which provides maximum efficiency for both strongly- and loosely-coupled inductive links. A parameter (i.e.: Strong Coupling Factor.) has been introduced to assist the design procedure. Discussed results from a practical 1.06 MHz inductive link, developed using the proposed design method, show that with proper selection of strong coupling factor $(mathrm{e}.mathrm{g}.: mathrm{C}=220.)$ the designed coil geometry can provide maximum PTE of 86 %, which is in close correlation (F $approx$ 3 %) with theoretical analysis using MATLAB.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"17 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":"127067697","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/WPTC45513.2019.9055684
Jorg Heinrich, Philipp Präg, N. Parspour, David Maier
This paper proposes a simplified efficiency calculation method for contactless energy transmission systems, CET for short. The focus lies on the extension of the efficiency calculation for different reactive power compensated coil arrangements and the consideration of load dependencies. The proposed approach leads to simplified descriptions of the load-dependent efficiency based only on well-defined variables such as the coupling factor $k$, the quality factor of the coil arrangement $Q$ and the operating point. A validation by measurements shows the practicability of the approach presented here.
{"title":"Efficiency Factor Calculation for Contactless Energy Transfer Systems","authors":"Jorg Heinrich, Philipp Präg, N. Parspour, David Maier","doi":"10.1109/WPTC45513.2019.9055684","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055684","url":null,"abstract":"This paper proposes a simplified efficiency calculation method for contactless energy transmission systems, CET for short. The focus lies on the extension of the efficiency calculation for different reactive power compensated coil arrangements and the consideration of load dependencies. The proposed approach leads to simplified descriptions of the load-dependent efficiency based only on well-defined variables such as the coupling factor $k$, the quality factor of the coil arrangement $Q$ and the operating point. A validation by measurements shows the practicability of the approach presented here.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"48 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":"127885875","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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