Temat: inductive power transfer

Skocz do pozycji: 1.

Tytuł:: A Review of Methods and Challenges for Improvement in Efficiency and Distance for Wireless Power Transfer Applications
Autorzy:: Kuka, Sokol
Ni, Kai
Alkahtani, Mohammed
Tematy:: wireless power transfer
inductive power transfer technique
efficiency
distance
safety
security; Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/1193899.pdf Link otwiera się w nowym oknie
Źródło:: Power Electronics and Drives; 2020, 5, 40; 1-25
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Opis:: Over the past few years, interest and research in wireless power transfer (WPT) have been rapidly incrementing, and as an effect, this is a remarkable technology in many electronic devices, electric vehicles and medical devices. However, most of the applications have been limited to very close distances because of efficiency concerns. Even though the inductive power transfer technique is becoming relatively mature, it has not shown near-field results more than a few metres away transmission. This review is focused on two fundamental aspects: the power efficiency and the transmission distance in WPT systems. Introducing the principles and the boundaries, scientific articles will be reviewed and discussed in terms of their methods and respective challenges. This paper also shows more important results in efficiency and distance obtained, clearly explaining the theory behind and obstacles to overcome. Furthermore, an overlook in other aspects and the latest research studies for this technology will be given. Moreover, new issues have been raised including safety and security.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Robust H∞ output feedback control of bidirectional inductive power transfer systems
Autorzy:: Swain, A.
Almakhles, D.
Neath, M. J.
Nasiri, A.
Tematy:: inductive power transfer
wireless power transfer
robust control
linear matrix inequalities
sensitivity analysis; Pokaż więcej
Data publikacji:: 2017
Powiązania:: https://bibliotekanauki.pl/articles/230097.pdf Link otwiera się w nowym oknie
Źródło:: Archives of Control Sciences; 2017, 27, 1; 41-62
1230-2384
Pojawia się w:: Archives of Control Sciences
Opis:: Bidirectional Inductive power transfer (IPT) systems behave as high order resonant networks and hence are highly sensitive to changes in system parameters. Traditional PID controllers often fail to maintain satisfactory power regulation in the presence of parametric uncertainties. To overcome these problems, this paper proposes a robust controller which is designed using linear matrix inequality (LMI) techniques. The output sensitivity to parametric uncertainty is explored and a linear fractional transformation of the nominal model and its uncertainty is discussed to generate a standard configuration for μ-synthesis and LMI analysis. An H∞ controller is designed based on the structured singular value and LMI feasibility analysis with regard to uncertainties in the primary tuning capacitance, the primary and pickup inductors and the mutual inductance. Robust stability and robust performance of the system is studied through μ-synthesis and LMI feasibility analysis. Simulations and experiments are conducted to verify the power regulation performance of the proposed controller.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis and investigations of inductive power transfer (IPT) systems in terms of efficiency and magnetic field distribution properties
Autorzy:: Miśkiewicz, R. M.
Anczewski, P.
Moradewicz, A. J.
Tematy:: contactless energy transfer
inductive power transfer
resonant compensation circuits
electromagnetic field distribution; Pokaż więcej
Data publikacji:: 2019
Powiązania:: https://bibliotekanauki.pl/articles/202253.pdf Link otwiera się w nowym oknie
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 4; 789-797
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Opis:: The problems connected to developing inductive power transfer IPT systems in aspects of high efficiency and suppression of electromagnetic field (EMF) emission are discussed. It is shown how important it is to compensate for large leakage impedance of IPT coils (air transformer) to improve efficiency of high power transfer. Such compensation circuits operating with resonant frequencies at soft switching conditions additionally allow for reduction of switching losses in power semiconductor devices of converters. The consideration has been illustrated and verified by experimental results measured on two different test stands (50 kW with planar coils and with two 12 kW receiver coils) built in a laboratory of the Łukasiewicz Research Network – Electrotechnical Institute.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: An Efficient Inductive Coil Link Design for Wireless Power Transfer to Visual Prostheses
Autorzy:: Celik, M.
Aydin, E.
Tematy:: wireless power transfer
inductive link
magnetic field
telemetry
visual prosthesis; Pokaż więcej
Data publikacji:: 2017-09
Powiązania:: https://bibliotekanauki.pl/articles/1031436.pdf Link otwiera się w nowym oknie
Źródło:: Acta Physica Polonica A; 2017, 132, 3; 535-537
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Opis:: Powering therapeutic devices plays a crucial role in the design phase of implantable electronic units. Batteries could not provide sufficient charge storage, used for the lifetime of the device, considering the space available for them. As sophisticated surgical procedures are required with the possible trauma to the patient such as material discrepancy and tissue damage, replacement is quite risky and not an option. Thus, therapeutic devices, especially visual prostheses, receive power wirelessly through inductive coil links which are connected to a battery outside the body. An inductive link is based on the main principle that there are two components such as primary and secondary units. Although primary unit includes the battery outside the body, power transmitter, and control unit, secondary unit under the skin contains amplifier, rectifier regulators, and power control unit. In this study, an inductive coil link is modelled to evaluate fundamental design specifications for visual prostheses. Inductive coil link parameters are quantitatively investigated so that maximum power transfer efficiency and miniaturization, which are critically important for electronics placed in intraocular region, are provided. Considering 20 mm distance, it is concluded that the separation and the size of the coil pair, loop diameter, frequency have a major role to determine the system performance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Estimation of the maximum load power in periodic WPT systems
Autorzy:: Stankiewicz, Jacek Maciej
Tematy:: wireless power transfer (WPT)
magnetic field
analytical methods
inductive elements; Pokaż więcej
Data publikacji:: 2021
Powiązania:: https://bibliotekanauki.pl/chapters/56896617.pdf Link otwiera się w nowym oknie
Źródło:: The problematic aspects of energy efficiency ’21; 111-124
9788366391697
Opis:: The article presents results for a proposed analytical solution to the analysis of the periodic Wireless Power Transfer (WPT) system. The model consists of transmitting and receiving plane coils. The analysis takes into account different variants geometry like distance between the transmitting and receiving coils and the number of turns. The influence of variable system geometry and the frequency on system efficiency is observed. The obtained results indicate at which system parameters wireless energy transfer is possible. The proposed systems can be used for wireless charging of mobile devices, and to shape the distribution of the magnetic field. The given solution allows for studying the influence of coil geometry on power transmission.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Sterowanie falownikiem napięcia w układzie cewek sprzężonych do zasilania pojazdów elektrycznych
Control of inverter for inductively powered electric vehicles
Autorzy:: Judek, S.
Karwowski, K.
Tematy:: pojazd elektryczny
bezstykowy przesył energii
cewki sprzężone
rezonans
electric vehicle
contactless power transfer
inductive coupling
power converter; Pokaż więcej
Data publikacji:: 2007
Powiązania:: https://bibliotekanauki.pl/articles/154075.pdf Link otwiera się w nowym oknie
Źródło:: Pomiary Automatyka Kontrola; 2007, R. 53, nr 4, 4; 60-63
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Opis:: Artykuł przedstawia analizę pracy oraz wybrane wyniki badania modelu laboratoryjnego układu bezstykowego przekazywania energii elektrycznej do pojazdów elektrycznych z wykorzystaniem cewek o słabym sprzężeniu magnetycznym. W szczególności omówiono warunki pracy układu w stanie rezonansu, dobór parametrów układu i metodę sterowania przekształtnika tranzystorowego w przypadku zmiany wielkości szczeliny powietrznej pomiędzy cewkami.
Most electrical equipment in common use is connected to the supply via plugs, flexible cables, slip rings, pantograph, etc. It can be useless in moist or explosion-endangered environment. This paper describes a technique, the contactless electrical energy transfer system, by which electrical energy may be transmitted through the large air gap. The transfer system is attractive especially for automatic battery charging stations and for energy supply of inductively powered electric vehicles and other movable consumers. In this case energy is transmitted via ironless transformer. Coupling between the windings is variables and depend on dimensions of air gap. The efficiency of system with large air gap (about 100 mm) can be considerably improved by using higher transmission frequencies in the range approximately 100 kHz. Large leakage inductances may be compensated also in resonance condition by adding capacitances to the windings. Paper presented analysis of power electronics converter with variable voltage frequency. These theoretical developments are compared with practical measurements from a prototype contactless system.
Dostawca treści:: Biblioteka Nauki

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