New Aspects on the Frequency Splitting and Bifurcation Phenomena in Wireless Power Transfer Systems
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2016, Vol 40, Issue 40
Abstract
This paper focuses on the frequency splitting and bifurcation phenomena that appear in the wireless power transfer systems. These two phenomena are analyzed for different possible configurations of the magnetically coupled circuits of the system, through electric circuit methods and mathematical calculus. Considering two printed spiral coils with similar geometrical properties, the study started with a calculus of the splitting frequency. It was made for the series-series connection, but also for series-parallel, parallelseries and parallel-parallel connections. The graphical representations of the load voltage as function of the frequency revealed that this phenomenon is visible only for the series-series and series-parallel connections; even if one or two peaks appear in all cases they are not directly connected to the frequency splitting phenomena, respectively to the spitting factor. The bifurcation phenomenon is analyzed starting from the bifurcation equation defined for the input admittance of the wireless power transfer system. The four types of configurations are analyzed from the graphical representations of the imaginary part of the admittance as function of the frequency. Because an important factor in the frequency splitting and bifurcation phenomena appearance is the ratio between the input resistance and the load resistance, in the last part of the paper the splitting coupling factor as function of the input resistance – load resistance ratio is depicted. The paper brings new contributions in the field through a comparative study on the frequency splitting and bifurcation phenomena for all the four types of configuration of the wireless power transfer systems. Through mathematical calculations, formulas for estimating the frequency (angular frequency) of occurrence of each phenomenon are obtained. The results are validated by comparative simulations related to a system of identical spiral coupled coils. The results of the analysis were commented comparatively and some conclusions could be drawn.
Authors and Affiliations
Mihai Iordache, Andrei Marinescu, Ioana-Gabriela Sîrbu, Lucian Mandache, Dragoş Niculae, Lavinia Iordache
Keywords
Related Articles
- EP ID EP263618
- DOI -
- Views 154
- Downloads 0
Analyzing of the Air Preheater Operation of the Steam Generators in Power Plants
The paper presents, in the firs part, the importance of the steam generator in the operation of power plants, especially, the importance of the air preheater, the last heat exchange surface on the route of the flue ga...
COMPARATIVE ACTIVE CURRENT CALCULATION BY p-q AND CPC THEORIES
This paper studies the possibilities of decomposition of the current in three-phase, three-wire systems based on the classic p-q theory proposed by Akagi and further developed and, respectively, on the Czarnecki’s theory...
THE SIMULINK MODEL OF A MULTILAYER WALL FOR THE STUDY OF THE THERMAL TRANSFER IN TRANSIENT REGIME
The problem of modeling and simulation of the dynamic regimes of the electrical ovens and of the electro-thermal plants in general, proves to be extremely complex. Such a simulation must take into consideration many para...
COMPUTATIONAL ANALYSIS OF HYDRODYNAMIC EFFECTS IN HYDRAULIC FLOW TURBINES (PART 1)
Research and elaboration of the systems for conversion of renewable energy sources (RSE) as a research objective present great interest and importance. Hydraulic energy currently is one of the most used, cheap and clean...
A MATRIX APPROACH TO MODEL SHIPPING TYPE COLORED PETRI NETS WITH PRIORITIES ON COLOR MARKS
This paper presents a transport model which allows coverage in a single model of various components, actions, attributes, priorities of a transport system (military or civilian). A description of the complexity of shippi...