Abstract
In this paper, parameter analysis of the inductive coils is evaluated for low power Wireless Power Transfer (WPT) applications. Inductive coils are the major element used in the WPT systems, in which different shaped coils are employed. The selection of coils is very critical, depends purely on the fundamental characteristics (shape and geometry) of the coils. In order to design a better system, three different shapes of coils, namely, circular, square and rectangular are designed and analysed. The vital parameters such as self-inductance, mutual inductance, quality factor, magnetic field and efficiency are evaluated for all three coils. It is observed that these parameters are maximal for circular as compared to the other two shapes. The circular coils produce higher voltage efficiency of 29% as compared to rectangular (25%) and square (23%) shaped coils. Thus, this paves a way to other researchers to suitably select circular inductive coils for wireless electricity applications.
Highlights
Nikolas Tesla [1] for the first time perceives a method of inductively coupled Wireless Power Transfer (WPT)
Chandrasekharan NATARAJ et al.: General Analysis of Resonance Coupled Wireless Power Transfer (WPT) Using Inductive Coils pulse outputs from the pulse generator are passed as an input to H- Bridge based signal conditioning circuit
As per the current ratio shown in Eq (14), the power transfer efficiency is significantly governed by the coil parameters such as coupling factor, quality factor, coil inductances and so on
Summary
Nikolas Tesla [1] for the first time perceives a method of inductively coupled Wireless Power Transfer (WPT). The basic principle is to use two coils in appropriate orientation and maximized to its peak at resonant frequency Such coils could be able to transfer maximum power to remote devices located centimeters range apart, a phenomenon called strongly coupled resonance mode [2, 3]. The applications in view are such as biomedical implants, portable devices, robots, consumer electronics, and electrical vehicles [8] In this WPT scheme, the most significant consideration is power transfer efficiency and distance coverage both for non-oriented or properly oriented two coils. There is still a requirement to conduct a detailed investigation and analysis for proving circular coil as the best suitable choice for the WPT environment It brings great benefit for the future research works to use the different shapes of coils according to their scope and intended application.
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