Modeling Framework for Contactless Energy Transfer Systems for Linear Actuators

This paper presents a semianalytical modeling framework to evaluate the performance of a contactless energy transfer system which consists of multiple primary windings and a linear moving secondary winding. The modeling framework combines steady-state and electromagnetic analyses and is able to deal with different winding configurations, consisting of combinations of nonmagnetic materials, iron plates, and slotted structures. In this paper, the modeling framework is used to compare the geometrical dimensions of the six different winding configurations under the condition of a constant magnetic coupling. The analysis shows that flat and thin primary windings and a flat and wide secondary winding are favorable for a constant magnetic coupling.