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Journal articles on the topic 'Inductive transfer'

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Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Madzharov, Nikolay D., Raycho T. Ilarionov, and Anton T. Tonchev. "System for Dynamic Inductive Power Transfer." Indian Journal of Applied Research 4, no. 7 (October 1, 2011): 173–76. http://dx.doi.org/10.15373/2249555x/july2014/52.

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2

Covic, Grant A., and John T. Boys. "Inductive Power Transfer." Proceedings of the IEEE 101, no. 6 (June 2013): 1276–89. http://dx.doi.org/10.1109/jproc.2013.2244536.

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3

Liu, Xiaobo. "Ensemble Inductive Transfer Learning." Journal of Fiber Bioengineering and Informatics 8, no. 1 (June 2015): 105–15. http://dx.doi.org/10.3993/jfbi03201510.

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4

Pantic, Zeljko, Kibok Lee, and Srdjan M. Lukic. "Multifrequency Inductive Power Transfer." IEEE Transactions on Power Electronics 29, no. 11 (November 2014): 5995–6005. http://dx.doi.org/10.1109/tpel.2014.2298213.

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5

Haroswati Che Ku Yahaya, Cik Ku, Syed Farid Syed Adnan, Murizah Kassim, Ruhani Ab Rahman, and Mohamad Fazrul Bin Rusdi. "Analysis of Wireless Power Transfer on the inductive coupling resonant." Indonesian Journal of Electrical Engineering and Computer Science 12, no. 2 (November 1, 2018): 592. http://dx.doi.org/10.11591/ijeecs.v12.i2.pp592-599.

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Wireless power transfer through inductive coupling is proposed in this paper. Based on the concept of Tesla, the circuit was designed using two parallel inductors that are mutually coupled. The designed was split into two which are transmitter part and receiver part. The circuit was simulated using proteus simulation software. The results had shown that the changes in a number of turn of the inductor coils and distance of the two resonators affecting the efficiency of the power transfer. The wireless power transfer can be described as the transmission of electrical energy from the power source to the electrical load without any current-carrying wire connecting them. Wireless power transfer is deemed to be very useful in some circumstances where connecting wires are inconvenient. Wireless power transfer problems are different from wireless telecommunications such as radio. Commonly, wireless power transfers are conducted using an inductive coupling and followed by magnetic induction characteristics. In this project, we use magnetic induction using copper wire with a different diameter. By using these different diameters of wires, we are going to see the power transfer performance of each wire. It is possible to achieve wireless power transfer up to 30 centimeters between the transmitter and the receiver with a higher number of coil's turn. As concern as it may seem, the wireless power transfer field would be in high demand for electric power to be supplied in the future.

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6

Madzharov, Nikolay D., and Valentin S. Nemkov. "Technological inductive power transfer systems." Journal of Electrical Engineering 68, no. 3 (May 1, 2017): 235–44. http://dx.doi.org/10.1515/jee-2017-0035.

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Abstract Inductive power transfer is a very fast expanding technology with multiple design principles and practical implementations ranging from charging phones and computers to bionic systems, car chargers and continuous power transfer in technological lines. Only a group of devices working in near magnetic field is considered. This article is devoted to overview of different inductive power transfer (IPT) devices. The review of literature in this area showed that industrial IPT are not much discussed and examined. The authors have experience in design and implementation of several types of IPTs belonging to wireless automotive chargers and to industrial application group. Main attention in the article is paid to principles and design of technological IPTs

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7

Raval, Pratik, Dariusz Kacprzak, and Aiguo P. Hu. "3D inductive power transfer power system." Wireless Power Transfer 1, no. 1 (March 2014): 51–64. http://dx.doi.org/10.1017/wpt.2014.7.

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To date, the technique of inductive power transfer has found applications in industry including two-dimensional battery charging. However, this restricts any load to planar movements. This paper proposes custom designed magnetic structures of a loosely magnetically coupled three-dimensional inductive power transfer system. This is done via computational software utilizing the finite-element-method. More specifically, single-phase and multi-phase primary magnetic structures are proposed to distribute a power transfer window along three orthogonal axes. Next, a secondary magnetic structure is custom designed to induce electromotive force in three-dimensions. The proposed system is simulated to demonstrate power transfer for charging an AA-battery cell. Finally, the thermal effects upon the secondary load are considered.

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8

Nietschke, Wilfried, Frank Fickel, and Steffen Kümmell. "Inductive Energy Transfer for Electric Vehicles." ATZautotechnology 11, no. 2 (April 2011): 42–47. http://dx.doi.org/10.1365/s35595-011-0024-5.

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9

Covic, Grant A. "Inductive power transfer: Powering our future." Journal of Physics: Conference Series 476 (December 4, 2013): 012001. http://dx.doi.org/10.1088/1742-6596/476/1/012001.

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10

Lawson, James, Manuel Pinuela, David C. Yates, Stepan Lucyszyn, and Paul D. Mitcheson. "Long range inductive power transfer system." Journal of Physics: Conference Series 476 (December 4, 2013): 012005. http://dx.doi.org/10.1088/1742-6596/476/1/012005.

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11

Illiano, Enzo, and Christian Stutz. "E-Machine with Inductive Energy Transfer." ATZelektronik worldwide 8, no. 1 (February 2013): 20–24. http://dx.doi.org/10.1365/s38314-013-0143-4.

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12

Nietschke, Wilfried, Frank Fickel, and Steffen Kümmell. "Inductive Energy Transfer for Electric Vehicles." ATZ worldwide eMagazine 113, no. 4 (March 25, 2011): 22–27. http://dx.doi.org/10.1365/s38311-011-0039-y.

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13

Luis, Roger, L. Enrique Sucar, and Eduardo F. Morales. "Inductive transfer for learning Bayesian networks." Machine Learning 79, no. 1-2 (December 22, 2009): 227–55. http://dx.doi.org/10.1007/s10994-009-5160-4.

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14

Stevens, Christopher J. "A magneto-inductive wave wireless power transfer device." Wireless Power Transfer 2, no. 1 (March 2015): 51–59. http://dx.doi.org/10.1017/wpt.2015.3.

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Magneto-inductive waves are a form of propagation which only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. We present an investigation of their potential as contactless power transfer devices capable of carrying power along a surface between suitably prepared terminals while simultaneously offering a broadband data channel. Input impedances and their matching conditions are explored with a view to offering a simple power system design. A device with 75% peak and 40% minimum efficiency is demonstrated and designs with potential for better than 70% mean and 90% peak are reported. The product of planar magnetic coupling and metamaterial cell Q factor is determined to be a key optimization parameter for high efficiency.

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15

Kamiński, Bartłomiej, Marcin Nikoniuk, and Łukasz Drązikowski. "A concept of propulsion and power supply systems for PRT vehicles." Archives of Transport 27-28, no. 3-4 (December 31, 2013): 81–93. http://dx.doi.org/10.5604/01.3001.0004.0110.

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An innovative propulsion and power supply topology for Personal Rapid Transit is presented. The concept is based on application of linear induction motor for propulsion and hybrid power supply using Contactless Energy Transfer supported by a supercapacitor energy storage. Proposed solution is based on the application of linear induction motor as a propulsion and inductive contactless energy transfer.

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16

Bertoluzzo, Manuele, and Giuseppe Buja. "Frequency Tuning in Inductive Power Transfer Systems." Electronics 9, no. 3 (March 23, 2020): 527. http://dx.doi.org/10.3390/electronics9030527.

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Inductive power transfer systems (IPTSs) systems are equipped with compensation networks that resonate at the supply frequency with the inductance of the transmitting and receiving coils to both maximize the power transfer efficiency and reduce the IPTS power sizing. If the network and coil parameters differ from the designed values, the resonance frequencies deviate from the supply frequency, thus reducing the IPTS efficiency. To cope with this issue, two methods of tuning the IPTS supply frequency are presented and discussed. One method is aimed at making resonant the impedance seen by the IPTS power supply, the other one at making resonant the impedance of the receiving stage. The paper closes by implementing the first method in an experimental setup and by testing its tuning capabilities on a prototypal IPTS used for charging the battery of an electric vehicle.

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17

Kwan, Christopher H., James Lawson, David C. Yates, and Paul D. Mitcheson. "Position-insensitive long range inductive power transfer." Journal of Physics: Conference Series 557 (November 27, 2014): 012053. http://dx.doi.org/10.1088/1742-6596/557/1/012053.

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18

Besuchet, Romain, Christophe Auvigne, Dan Shi, Christophe Winter, Yoan Civet, and Yves Perriard. "Optimisation of an inductive power transfer structure." Journal of international Conference on Electrical Machines and Systems 2, no. 3 (September 1, 2013): 349–55. http://dx.doi.org/10.11142/jicems.2013.2.3.349.

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19

Silver, Daniel L., Ryan Poirier, and Duane Currie. "Inductive transfer with context-sensitive neural networks." Machine Learning 73, no. 3 (October 21, 2008): 313–36. http://dx.doi.org/10.1007/s10994-008-5088-0.

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20

Huttegger, Simon M., and Brian Skyrms. "Emergence of Information Transfer by Inductive Learning." Studia Logica 89, no. 2 (July 2008): 237–56. http://dx.doi.org/10.1007/s11225-008-9123-8.

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21

Zhaksylyk, Yelzhas, Einar Halvorsen, Ulrik Hanke, and Mehdi Azadmehr. "Analysis of Fundamental Differences between Capacitive and Inductive Impedance Matching for Inductive Wireless Power Transfer." Electronics 9, no. 3 (March 13, 2020): 476. http://dx.doi.org/10.3390/electronics9030476.

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Inductive and capacitive impedance matching are two different techniques optimizing power transfer in magnetic resonance inductive wireless power transfer. Under ideal conditions, i.e., unrestricted parameter ranges and no loss, both approaches can provide the perfect match. Comparing these two techniques under non-ideal conditions, to explore fundamental differences in their performance, is a challenging task as the two techniques are fundamentally different in operation. In this paper, we accomplish such a comparison by determining matchable impedances achievable by these networks and visualizing them as regions of a Smith chart. The analysis is performed over realistic constraints on parameters of three different application cases both with and without loss accounted for. While the analysis confirms that it is possible to achieve unit power transfer efficiency with both approaches in the lossless case, we find that the impedance regions where this is possible, as visualized in the Smith chart, differ between the two approaches and between the applications. Furthermore, an analysis of the lossy case shows that the degradation of the power transfer efficiencies upon introduction of parasitic losses is similar for the two methods.

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22

Agbinya, Johnson Ihyeh. "A MAGNETO-INDUCTIVE LINK BUDGET FOR WIRELESS POWER TRANSFER AND INDUCTIVE COMMUNICATION SYSTEMS." Progress In Electromagnetics Research C 37 (2013): 15–28. http://dx.doi.org/10.2528/pierc12120511.

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23

Alhamrouni, Ibrahim, M. Iskandar, Mohamed Salem, Lilik J. Awalin, Awang Jusoh, and Tole Sutikno. "Application of inductive coupling for wireless power transfer." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (September 1, 2020): 1109. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1109-1116.

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Considering the massive development that took place in the past two decades, wireless power transfer has yet to show the applicability to be used due to several factors. This work focuses on determining the main parameters like, mutual inductance, and coupling coefﬁcient for a pair of helical coils for wireless power transfer applications. These parameters are important in designing and analyzing a wireless power transfer system based on the phenomenon of inductive/ resonant inductive coupling. Here presents a simple approach based on fundamental laws of physics for determining the coupled coil parameters for single layered helical coils. The results conducted by computer simulation which is MATLAB. Furthermore, this analysis is used to study the effect of change in coil diameter, mutual inductance coefficient and change in distance between coils on parameters like self and mutual inductance of coupled coils which is of great importance in Wireless Power Transfer applications. The research yielded promising results to show that wireless power transfer has huge possibility to solve many existing industrial problems.

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24

Niedermeier, Florian, Marius Hassler, Josef Krammer, and Benedikt Schmuelling. "The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems." Wireless Power Transfer 6, no. 2 (June 7, 2019): 77–84. http://dx.doi.org/10.1017/wpt.2019.7.

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AbstractThe characteristic transfer parameters of inductive power transfer systems highly depend on the relative position of the coils to each other. While translational offset has been investigated in the past, the effect of rotatory offset on the transfer parameters is widely unclear. This paper contains simulation results of an inductive power transfer system with a rotatory offset in three axes and shows the possible improvements in the coupling coefficient. As a result, rotation angles can be used as control parameters and thereby increase the system efficiency. Alternatively, the allowed misalignment area of the secondary coil can be increased while maintaining the functionality and same dimensions.

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25

Zhang, Xu, and Guo Ying Meng. "Theoretical Analysis of Power Transfer Performance of Primary and Secondary Compensation Topology of Inductive Coupled Power Transfer System." Advanced Materials Research 529 (June 2012): 43–48. http://dx.doi.org/10.4028/www.scientific.net/amr.529.43.

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Inductive coupled power transfer system is based on the principle of electromagnetic induction to transfer power from the primary side to the secondary side of a loosely coupled transformer, which can transfer electricity wirelessly. The loosely coupled transformer has large leakage inductance, which reduces the power transfer efficiency. In order to reduce the leakage inductance, a capacitance is used at the primary side and secondary side of a loosely coupled transformer, which can increase the power transfer efficiency. For four different compensation structures, this paper analyses the coupling coefficient and the secondary quality factor’s influence on the voltage gain, current gain and transfer efficiency, and also compares different compensation structures

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26

Kaczmarczyk, Zbigniew, Marcin Kasprzak, Adam Ruszczyk, Kacper Sowa, Piotr Zimoch, Krzysztof Przybyła, and Kamil Kierepka. "Inductive Power Transfer Subsystem for Integrated Motor Drive." Energies 14, no. 5 (March 4, 2021): 1412. http://dx.doi.org/10.3390/en14051412.

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An inductive power transfer subsystem for an integrated motor drive is presented in this paper. First, the concept of an integrated motor drive system is overviewed, and its main components are described. Next, the paper is focused on its inductive power transfer subsystem, which includes a magnetically coupled resonant circuit and two-stage energy conversion with an appropriate control method. Simplified complex domain analysis of the magnetically coupled resonant circuit is provided and the applied procedure for its component selection is explained. Furthermore, the prototype of the integrated motor drive system with its control is described. Finally, the prototype based on the gallium nitride field effect transistors (GaN FET) inductive power transfer subsystem is experimentally tested, confirming the feasibility of the concept.

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27

Rayes, Mohamed El, Gihan Nagib, and Wahied G. Ali Abdelaal. "Performance Enhancement for Inductive Coupling Wireless Power Transfer." Research Journal of Applied Sciences, Engineering and Technology 16, no. 4 (September 15, 2019): 140–52. http://dx.doi.org/10.19026/rjaset.16.6018.

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28

Madzharov, Nikolay D., and Anton T. Tonchev. "Inductive High Power Transfer Technologies for Electric Vehicles." Journal of Electrical Engineering 65, no. 2 (March 1, 2014): 125–28. http://dx.doi.org/10.2478/jee-2014-0019.

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Abstract Problems associated with ”how to charge the battery pack of the electric vehicle” become more important every passing day. Most logical solution currently is the non-contact method of charge, possessing a number of advantages over standard contact methods for charging. This article focuses on methods for Inductive high power contact-less transfer of energy at relatively small distances, their advantages and disadvantages. Described is a developed Inductive Power Transfer (IPT) system for fast charging of electric vehicles with nominal power of 30 kW over 7 to 9 cm air gap.

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29

Volk, T., S. Stöcklin, C. Bentler, S. Hussain, A. Yousaf, J. Ordonez, T. Stieglitz, and L. M. Reindl. "Inductive Micro-tunnel for an Efficient Power Transfer." Procedia Engineering 120 (2015): 511–15. http://dx.doi.org/10.1016/j.proeng.2015.08.687.

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30

Vu, Tuan Anh, Chi Van Pham, Anh-Vu Pham, and Christopher S. Gardner. "Wireless power transfer through metal using inductive link." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 4 (December 1, 2019): 1906. http://dx.doi.org/10.11591/ijpeds.v10.i4.pp1906-1913.

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<span style="color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">This paper presents a highly efficient power transfer system based on a co-design of a class-E power amplifier (PA) and a pair of inductively coupled Helical coils for through-metal-wall power transfer. Power is transferred wirelessly through a 3.1-mm thick aluminum barrier without any physical penetration and contact. Measurement results show that the class-E PA achieves a peak power gain of 25.2 dB and a maximum collector efficiency of 57.3%, all at 200 Hz. The proposed system obtains a maximum power transfer efficiency of 9% and it can deliver 5 W power to the receiver side through the aluminum barrier.</span>

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31

Madawala, U. K., and D. J. Thrimawithana. "Current sourced bi-directional inductive power transfer system." IET Power Electronics 4, no. 4 (2011): 471. http://dx.doi.org/10.1049/iet-pel.2010.0145.

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32

Zucker, O., J. Long, K. Lindner, D. Giorgi, and T. Navapanich. "Inductive energy transfer circuit proof of principle experiment." Review of Scientific Instruments 57, no. 5 (May 1986): 859–62. http://dx.doi.org/10.1063/1.1138825.

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33

Lawson, James, David C. Yates, and Paul D. Mitcheson. "High $Q$ Coil Measurement for Inductive Power Transfer." IEEE Transactions on Microwave Theory and Techniques 67, no. 5 (May 2019): 1962–73. http://dx.doi.org/10.1109/tmtt.2019.2901442.

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34

Pugi, Luca, Alberto Reatti, Rosa Anna Mastromauro, and Fabio Corti. "Modelling of inductive resonant transfer for electric vehicles." International Journal of Electric and Hybrid Vehicles 10, no. 2 (2018): 131. http://dx.doi.org/10.1504/ijehv.2018.095715.

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35

Corti, Fabio, Rosa Anna Mastromauro, Alberto Reatti, and Luca Pugi. "Modelling of inductive resonant transfer for electric vehicles." International Journal of Electric and Hybrid Vehicles 10, no. 2 (2018): 131. http://dx.doi.org/10.1504/ijehv.2018.10016874.

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36

Tomanek, Radek, Jan Martiš, and Pavel Vorel. "High Power Wireless Power Transfer with Inductive Coupling." ECS Transactions 99, no. 1 (December 12, 2020): 373–80. http://dx.doi.org/10.1149/09901.0373ecst.

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37

Brown, J. B., Yasushi Okuno, Gilles Marcou, Alexandre Varnek, and Dragos Horvath. "Computational chemogenomics: Is it more than inductive transfer?" Journal of Computer-Aided Molecular Design 28, no. 6 (April 27, 2014): 597–618. http://dx.doi.org/10.1007/s10822-014-9743-1.

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38

Sedwick, Raymond J. "Long range inductive power transfer with superconducting oscillators." Annals of Physics 325, no. 2 (February 2010): 287–99. http://dx.doi.org/10.1016/j.aop.2009.08.011.

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39

Adeeb, M. A., A. B. Islam, M. R. Haider, F. S. Tulip, M. N. Ericson, and S. K. Islam. "An Inductive Link-Based Wireless Power Transfer System for Biomedical Applications." Active and Passive Electronic Components 2012 (2012): 1–11. http://dx.doi.org/10.1155/2012/879294.

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A wireless power transfer system using an inductive link has been demonstrated for implantable sensor applications. The system is composed of two primary blocks: an inductive power transfer unit and a backward data communication unit. The inductive link performs two functions: coupling the required power from a wireless power supply system enabling battery-less, long-term implant operation and providing a backward data transmission path. The backward data communication unit transmits the data to an outside reader using FSK modulation scheme via the inductive link. To demonstrate the operation of the inductive link, a board-level design has been implemented with high link efficiency. Test results from a fabricated sensor system, composed of a hybrid implementation of custom-integrated circuits and board-level discrete components, are presented demonstrating power transmission of 125 mW with a 12.5% power link transmission efficiency. Simultaneous backward data communication involving a digital pulse rate of up to 10 kbps was also observed.

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40

Pi, Jun, and Xi Peng Xu. "Design of Integration Tool-Holder System for Ultrasonic Vibration Machining Using Contactless Inductive Power Transfer." Advanced Materials Research 69-70 (May 2009): 520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.520.

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Contactless inductive power transfer system with conventional inductive technology was studied and a design method was presented after applying it to ultrasonic vibration machining systems. The compensation techniques are used for piezoelectricity transducer. Nodal plane support of transducer is researched and models of different structures for nodal plane support are got. Influence of rotary precision for different support due to centrifugal force and displacement vibration of nodal plane support to toolholder are analyzed. The system integrated with ultrasonic-vibration toolholder based on contactless inductive power transfer is designed. Power transfer and dynamic tests show that the design procedures and result based on theoretical analysis are comparative.

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41

Haerinia, Mohammad, and Reem Shadid. "Wireless Power Transfer Approaches for Medical Implants: A Review." Signals 1, no. 2 (December 16, 2020): 209–29. http://dx.doi.org/10.3390/signals1020012.

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Wireless power transmission (WPT) is a critical technology that provides an alternative for wireless power and communication with implantable medical devices (IMDs). This article provides a study concentrating on popular WPT techniques for IMDs including inductive coupling, microwave, ultrasound, and hybrid wireless power transmission (HWPT) systems. Moreover, an overview of the major works is analyzed with a comparison of the symmetric and asymmetric design elements, operating frequency, distance, efficiency, and harvested power. In general, with respect to the operating frequency, it is concluded that the ultrasound-based and inductive-based WPTs have a low operating frequency of less than 50 MHz, whereas the microwave-based WPT works at a higher frequency. Moreover, it can be seen that most of the implanted receiver’s dimension is less than 30 mm for all the WPT-based methods. Furthermore, the HWPT system has a larger receiver size compared to the other methods used. In terms of efficiency, the maximum power transfer efficiency is conducted via inductive-based WPT at 95%, compared to the achievable frequencies of 78%, 50%, and 17% for microwave-based, ultrasound-based, and hybrid WPT, respectively. In general, the inductive coupling tactic is mostly employed for transmission of energy to neuro-stimulators, and the ultrasonic method is used for deep-seated implants.

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42

Castanho Fernandes, Rodolfo, and Azauri Albano de Oliveira Jr. "Design Of Loosely Coupled Magnetic Systems Based On Finite Element Method For Inductive Power Transfer Applications." Eletrônica de Potência 20, no. 1 (February 1, 2015): 94–103. http://dx.doi.org/10.18618/rep.2015.1.094103.

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43

Hwang, Young Jin, and Jong Myung Kim. "A Double Helix Flux Pipe-Based Inductive Link for Wireless Charging of Electric Vehicles." World Electric Vehicle Journal 11, no. 2 (April 3, 2020): 33. http://dx.doi.org/10.3390/wevj11020033.

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This paper presents a novel inductive link for wireless power transfer (WPT) system of electric vehicles (EVs). The WPT technology uses an alternating magnetic field to transfer electric power through space. The use of the WPT technology for charging electric vehicle provides an excellent alternative to the existing plug-in charging technology. It has been reported that the inductive link using planar coils such as the circular and rectangular coil are capable of transferring a high power with high efficiency. However, they have a poor tolerance for lateral misalignment, thus their power transfer efficiency decreases significantly with the misalignment. Due to the poor misalignment performance of the planar coil topology, extensive studies have been carried out on the flux pipe topology due to their excellent misalignment tolerance. To address this, in this paper, a novel inductive link using double helix flux pipe topology is proposed. The performances of the inductive link using the proposed double helix flux pipe are analyzed and compared with inductive links using conventional flux pipe. The proposed model has excellent characteristics in terms of the power transfer efficiency and tolerance against misalignments. The proposed model is capable of transferring over 1.6 kW of power with a coil-to-coil efficiency of over 98.5% at a load resistance of 20 Ω.

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44

Cho, Young Seek, Ji Hye Park, Yun Seo Nam, and Seyeong Choi. "Miniaturization of Inductive Resonator for Implementation of Wireless Power Transfer Technology Using Resonant Inductive Coupling." Journal of the Korea Institute of Information and Communication Engineering 18, no. 8 (August 31, 2014): 1798–804. http://dx.doi.org/10.6109/jkiice.2014.18.8.1798.

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45

Schmidt, Christian, Martin Buchholz, and Madhukar Chandra. "Optimization of loosely coupled inductive data transfer systems by non-Foster impedance matching." Advances in Radio Science 17 (September 19, 2019): 151–60. http://dx.doi.org/10.5194/ars-17-151-2019.

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Abstract. Wireless energy transfer is often used in industrial applications to power actors or sensors, for example in rotating applications as replacement for mechanical slip rings. In addition to the energy transfer, we have developed inductively coupled data transfer systems to expand the range of possible applications. The data transfer is accomplished by using loosely coupled coils on both sides of the power transfer system. In pure energy transfer systems, resonant coupling is used, meaning that the power transfer coils are both tuned to a common frequency to compensate the relatively small coupling factor between power transmitter and receiver and to achieve an impedance matching between both sides by compensating the inductive component of the transfer coils. In this case, capacitors can be connected in series or in parallel to the coils, leading to a sharp, narrow band resonance peak in the transfer function. In inductively coupled data transfer systems, this approach is often not useful because not just a pure sine wave has to be transferred but more likely a signal of a certain bandwidth. In one of our applications, a 100 Mbit s−1 Ethernet stream is transferred with an occupied bandwidth of 62.5 MHz. The coil structures used so far in our data transfer applications were intrinsically unmatched to the data transfer systems. Additionally, due to the small coupling factor between the data transfer coils, transfer losses in the range of up to 15 dB or worth had to be accepted. This is especially critical regarding the high noise level in vicinity of the energy transfer system and the cross coupling between the two transfer channels. For passive, lossless circuits, Foster's theorem states that the reactance increases monotonically with frequency. Subsequently, the inductive part of a circuit can just be exactly compensated with a capacitance for one single frequency. In contrast, active circuits like a negative impedance converter (NIC) can be used to achieve a non-Foster behaviour, for example a negative inductance can be realized. In theory, an inductance in series or parallel to a negative inductance of the same magnitude would be cancelled out for every frequency applied. For low power level applications like active receiving antennas, this approach has already been successfully used in the past to achieve improved matching of simple antenna structures over a comparably large bandwidth. We make use of non-Foster circuits, namely negative impedance converters, to compensate the inductive part of two loosely coupled inductors to achieve smaller transfer losses and better impedance matching, which should lead to a decreased transfer signal loss and higher signal to noise ratio. The results of this paper serve as a basis for this development. So far, we achieved almost complete cancellation of the reactive part introduced by the loosely coupled data transfer inductors. Unfortunately, the circuits active device used to form the negative impedance converter introduced a highly resistive element, greatly increasing the signal transfer losses. Nevertheless, the theory of loosely coupled inductors is shown in a compact form and a strategy to cancel the reactive part is presented. Simulations and measurements of a transfer system are carried out, both showing good agreement regarding the reactance cancellation. Based on this, optimised implementations will be developed in the future.

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Wang, C. S., G. A. Covic, and O. H. Stielau. "Power Transfer Capability and Bifurcation Phenomena of Loosely Coupled Inductive Power Transfer Systems." IEEE Transactions on Industrial Electronics 51, no. 1 (February 2004): 148–57. http://dx.doi.org/10.1109/tie.2003.822038.

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Vittal, Doss Prakash, Umapathy Arunachalam, Vedachalam Narayanaswamy, Vadivelan Arumugam, Ramesh Raju, Gidugu Ananda Ramadass, and Malayath Aravindakshan Atmanand. "Analysis of Subsea Inductive Power Transfer Performances Using Planar Coils." Marine Technology Society Journal 50, no. 1 (January 1, 2016): 17–26. http://dx.doi.org/10.4031/mtsj.50.1.3.

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AbstractSubsea inductive power transfer is one of the reliable and efficient methods for limited electric power transfer between closely located subsea systems. A planar coiled system is modeled using the electromagnetic finite element analysis software MagNet, and the simulation results are compared with those of a developed prototype; it is found that 75‐125 kHz is the optimum frequency for electrical power transfer in sea water conditions. The power transfer performance for various water gaps and offsets is identified. The results indicate that the power transfer efficiencies vary from 63.4% to 0.9% for water gaps ranging from 50 to 500 mm at an operating frequency of 125 kHz. The model is also extrapolated to flux concentrated designs, and the coil dimensions required for higher power transfer applications are identified.

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Marais, Rian, Sara S. Grobbelaar, and Imke H. de Kock. "Healthcare Technology Transfer in Sub-Saharan Africa: An Inductive Approach." International Journal of Innovation and Technology Management 16, no. 08 (December 2019): 1950055. http://dx.doi.org/10.1142/s021987701950055x.

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The research addressed within this paper sets out to develop a framework towards facilitating health-related technology transfer (TT) to and within sub-Saharan African countries. In turn, this framework will attempt to alleviate healthcare burdens in developing nations through a combination of acquisitions and collaborative technology development. Systematic conceptual and comparative literature reviews have been conducted to identify the major characteristics of TT. The conceptual review has outlined the universal characteristics of TT such as TT methods, prominent stakeholders and the importance of knowledge transfer while the systematic comparative review exclusively evaluated sub-Saharan African healthcare TT characteristics such as infrastructure barriers and the marketability of the transfer object. The outcomes of the literature reviews have been clustered into five phases, forming the basis of the conceptual framework. This framework aims to guide a user through the phases of technology development, technology analysis, technology transfer method application, change management and commercialization by providing managerial best practices at each phase. The conceptual framework has been evaluated by incorporating the outcomes of 16 semi-structured interviews conducted with healthcare and TT industry experts. The final framework aims to provide guidelines for any stakeholder involved in healthcare technology transfer regardless of the healthcare implementation by highlighting best practices surrounding stakeholder co-creation, transfer method application and constructing a sustainable healthcare technology transfer venture.

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Kim, Min-Jung, Dong-Myoung Joo, Sang-Joon Ann, and Byoung-Kuk Lee. "Two-Stage Inductive Power Transfer Charger for Electric Vehicles." Transactions of the Korean Institute of Power Electronics 22, no. 2 (April 20, 2017): 134–39. http://dx.doi.org/10.6113/tkpe.2017.22.2.134.

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Mathumathi, T. "Bidirectional Full Bridge Configuration for Inductive Wireless Power Transfer." International Journal for Research in Applied Science and Engineering Technology 7, no. 3 (March 31, 2019): 835–38. http://dx.doi.org/10.22214/ijraset.2019.3146.

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