Abstract
For an inductive power transfer system, high transfer quality factor means that the system can obtain large theoretical transmission efficiency. In this paper, a method of coil optimization in a limited space to improve the transfer quality factor for a series-series compensated inductive power transfer system is presented. High transfer quality factor in a limited space can be achieved by determining the optimal number of turns with equal turn spacing coil, and then optimizing the distance between adjacent turn. The results of finite element simulation and experimental measurement show that the method proposed in this paper can obtain a higher transfer quality factor than the conventional method of winding coil with equal turn spacing. The method proposed in this paper can be used to guide the optimal design of coils in a limited space.
Highlights
Wireless power transfer (WPT) has been widely used because there is no need for wire connection between power supply and equipment [1,2]
The method proposed in this paper can be used to guide the optimal design of coils in a limited space
The objective of this paper is to study how to design coils to obtain a relatively high transfer quality factor in a limited space
Summary
Wireless power transfer (WPT) has been widely used because there is no need for wire connection between power supply and equipment [1,2]. The inductive WPT technology based on magnetic coupling can realize power transmission under misaligned conditions [7]. It is favored in some scenes where it is difficult to use wired power supply, such as industrial manufacturing facilities, autonomous underwater vehicles, and medical implants. A compensation network is usually needed for efficient power transmission. In addition to the compensation network, there are research on control methods [15], simultaneous transmission of power and data [16], and design of electromagnetic coils for the WPT system
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