| dc.description.abstract | Wireless Power Transfer (WPT) is a fascinating technology that enables the transmission of electrical power without the need for physical connections. It offers various advantages and applications, making it an area of great interest. This section aims to provide an overview of WPT, exploring its historical background, advantages, and applications. By understanding the principles of WPT, including inductive coupling, resonant inductive coupling, and radio frequency energy harvesting, we can delve deeper into the technologies and methods used in this field. These technologies include magnetic resonance coupling, near-field communication (NFC), and microwave power transmission. However, despite its potential, WPT faces several challenges, such as the transfer distance (TD), the power transfer efficiency (PTE) and power loss due to coil design, electromagnetic interference, environmental factors, material properties etc., safety considerations, integration with the Internet of Things (IoT) and smart devices. The widespread acceptance of the technology largely depend on the success in addressing these challenges and exploring future and the advancement of WPT. Researchers have done some work and are still working continually to ensure that the problems currently associated with the total integration of the technology in the global economy are addressed. The most notable improvements are based on coil structure for uniform magnetic field distribution and circuit parameters modification and optimization for improved power transfer distance.
This thesis is a novel approach to shaping the electromagnetic field to improving the magnetic field strength and the magnetic field uniformity for the enhancement of the transfer distance using the Electromagnetic Halbach Array (EHA). To realize this objective, a multi-faceted approach was adopted. Firstly, an exhaustive examination of existing systems was undertaken, focusing on understanding the core challenges and analysing their efficacy. Subsequently, a critical evaluation of the proposed system was conducted, juxtaposing it against existing systems to discern the disparities and enhancements achieved. Lastly, an energy management system tailored for the EHA WPT system was conceptualized. Lastly, an energy management system for the EHA WPT system was studied.
The magnetic field shaping for the novel system has been done. An analytical model that can be used to identify trends, which can be used to optimize more complex design, and project and estimate the magnetic field without the need for more sophisticated FEM software. With simulation, different EHA with different coil geometries have been analyzed and results compared with fabricated experimental verification. An analytical model for the design of variable pitch EHA has also been developed where the coil pitch is uniform in the conventional model.
Varied modifications were done by combining the modified pitch coils in building sets of hybrid-EHA combinations of variable and uniform pitch coils. Finally, optimization has been done using the analytical model, verified with FEM software, and validated by fabricating and experimenting. | en_GB |
