Performance Improvement Techniques of Axial Flux Machines

This thesis presents several techniques for improving the performance of Axial Flux Permanent Magnet (AFPM) machines. The goal is to make them compact, efficient, and useful in electric powertrains, robotics, home appliances, and wind turbines. The main goal is to make these machines produce more torque, run more efficiently, and work smoothly under different conditions. The thesis is divided into many different chapters; the first chapter gives an overview of the thesis, explaining the thesis's organization and structure. The second chapter gives the details about the classification of the axial flux machine and its topologies, as well as discusses the general equations for the design of electrical machines. The rest of the chapters discuss the performance improvement techniques, with each of them proposing a different technique to increase the performance of axial flux machines. The overall thesis aims to reduce cogging torque, improve winding methods using Phase Group Concentrated Coil (PGCC), increase torque capabilities by exploiting the tangential component of force in the airgap, design a high-temperature superconducting (HTS) machine with MgB2 magnets, and design a dual three-phase AFPM generator for better reliability. All these performance-improving techniques are discussed in chapters three to seven. 3D finite element analysis simulations were performed to analyze the performance of proposed performance improvement techniques. For the Dual three-phase axial flux PM and HTS machine, prototypes were developed, and testing was done to check voltage, current, power, and efficiency. A working model was built and tested under different speeds and loads. This work helps in building better AFPM machines for future use in modern technology.