Evaluation Study of Different Integration Methods of LCC Compensation Network for Various Types of Magnetic Structures of Wireless Power Transfer

Nowadays, wireless power transfer (WPT) plays an essential function in the power electronics systems, due to its significant reliability and efficiency. Majority of electrical devices which using batteries can have a chance of charge wirelessly, for instance, most of the electric home devices and electric vehicles (EVs). However, owing to the size and structure of the devices as well as applications, which want to use the wireless power transfer system, compactness is an important part for designers. Some magnetic structures use the large size of coils, or some compensation methods utilize more inductive and capacitive elements, which are affected the size of the whole WPT system. One solution for the size issue is integrated the compensation elements such as placing the compensation coils into the main coils of the WPT. Therefore, the system reaches more compactness and requires lesser spaces compared to the non-integrated one. In this paper, the various types of magnetic structures for WPT applications are magnetically analyzed, and different methods for integrating the compensation coils are evaluated with 3D finite element analysis. Hence, this paper assists the engineers in a way that they can use these integration methods for each type of magnetic structures as well as the compensation networks directly and accurately, to have a compact WPT system.