**Author details**

"WPT 1" category according to the "SAE TIR J2954" wireless charging station

*Evaluation of the values of magnetic field around shielded (system) and non-shielded system (right) during*

*Output power characteristic (left) and efficiency characteristic (right) for shielded system and 20 cm power*

*Wireless Power Transfer – Recent Development, Applications and New Perspectives*

To verify the shielding efficiency, a scattering magnetic field was also measured (measurement uncertainty <2%) around the coupling coils using a calibrated Narda ELT 400 probe. The values were recorded in the cutting plane with a regular step of 10 cm in length (**Figure 33**). The values of the magnetic induction relevant for hygienic limits are boarded by red dashed line (**Figure 33** left). It is seen, that specified limits are achieved approximately 20 cm from the top surface of the coils. Compared to unshielded system (**Figure 33** right), it is reduction of approximately

Based on the received and verified results it was achieved, that with the use of presented methodology, it is possible to design wireless charger, whose characteris-

The paper has given a brief recapitulation of most important standards and regulations relating to the high-power wireless charging systems. It has proposed the magnetic couplers to be designed exactly according to optimal operation to the

tics will meet standards and normative defined by regulatory companies.

standard.

**Figure 33.**

**Figure 32.**

*transfer distance.*

**5. Conclusions**

specific load.

**70**

60 cm considering the spherical distance.

*experimental measurement at full power of proposed system.*

Vladimir Kindl<sup>1</sup> , Michal Frivaldsky<sup>2</sup> \*, Jakub Skorvaga<sup>2</sup> and Martin Zavrel<sup>1</sup>

1 Faculty of Electrical Engineering, University of West Bohemia, Pilsen, Czech Republic

2 Faculty of Electrical Engineering and Information Technologies, University of Zilina, Zilina, Slovakia

\*Address all correspondence to: michal.frivaldsky@feit.uniza.sk

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
