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Efficiency and stray magnetic field are two important factors for coils design in inductive power transfer. By adding passive shields to the coils, stray magnetic field is significantly attenuated. However, coils' efficiency is reduced due to losses of the shields. Both efficiency and stray magnetic field should be considered for fair comparison of shields' performances. Four kinds of passive shields...
Efficiency and stray magnetic field are influenced simultaneously by design of planar coils in inductive power transfer. Their synergetic optimization is lacking in previous literature. Parametric sweep in finite-element simulation is one method for optimization but it's time-consuming because thousands of simulations are required. A faster method using matrix calculation is described in this paper...
In order to achieve a generalized and non-iterative design methodology of coils in inductive power transfer, parameters are normalized as coupling coefficient, coil quality factor, load quality factor, and normalized switching frequency. They are designed sequentially to meet the required voltage gain, zero-voltage switching, and coils' efficiency. Physical design of coils' dimensions, number of turns,...
Coils' efficiency and stray magnetic field should be optimized together when designing coils for inductive power transfer. Multi-objective optimization using Pareto front is a suitable method. It also provides a straightforward and accurate insight of the relationship between coils' efficiency and stray magnetic field since all the solutions along the fronts are optimized structures. In this paper,...
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