A New Analytical Calculation of the Mutual Inductance of the Coaxial Spiral Rectangular Coils

Author

Cheng, Yuan Bing ; Shu, Y.

Author_Institution

Educ. Minist. Key Lab. of RF Circuits & Syst., Hangzhou Dianzi Univ., Hangzhou, China

Volume

50

Issue

4

fYear

2014

fDate

41730

Firstpage

1

Lastpage

6

Abstract

The mutual inductance between two coils is a key parameter in the inductively coupled wireless power transmission. The spiral rectangular coils are easier to implement than the circular ones, but the study of the mutual inductance of the spiral rectangular coils is not enough. In this paper, a new analytical calculation of the coaxial spiral rectangular coils is presented, which is simpler than the greenhouse method. The impact of the track thickness and width is also analyzed. The calculation results are verified by the existing methods and the experimental results. Based on these results, some guidelines for optimizing the coupling coefficient are given, when the received coil´s size is limited by space constraints.

Keywords

coils; inductance; inductive power transmission; coaxial spiral rectangular coils; coupling coefficient; greenhouse method; inductively coupled wireless power transmission; mutual inductance; track thickness; track width; Circuits and systems; Coils; Couplings; Inductance; Power transmission; Spirals; Wireless communication; Coaxial rectangular coils; Mutual inductance; coaxial rectangular coils; mutual inductance; spiral coils; track width;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2290972

Filename

6665159