Lee C.H. Design, Analysis and Application of Magnetless Doubly Salient Machines

Springer Nature Singapore Pte Ltd., 2018. — 215 p. – (Springer Theses) — ISBN: 9811070768.This thesis investigates the key characteristics of magnetless doubly salient machines, evaluates their design philosophies, and proposes new topologies for various applications. It discusses the background of and previous research on magnetless machines, while also outlining upcoming trends and potential future developments.
The thesis begins by presenting various torque-improving structures - namely the multi-tooth structure, the double-rotor (DR) structure, the axial-field (AF) structure, and the flux-reversal (FR) structure - for magnetless machines. It subsequently addresses the idea of merging the design philosophies of two different machines to form new dual-mode machines. Thanks to a reconfigured winding arrangement and controllable DC-field excitation, the proposed machines can further extend their operating range to meet the extreme demands of applications in electric vehicles and wind power generation. Lastly, the thesis employs the finite element method (FEM) to thoroughly analyze the proposed machines' key performance parameters and develops experimental setups to verify the proposed concepts.Overview of Magnetless Doubly Salient Brushless Machines
Modeling, Numerical Analysis and Experimental Verification of Torque Improving Topologies
Multi-tooth Machines—Design and Analysis
Double-Rotor Machines—Design and Analysis
Development of Singly Fed Mechanical-Offset Machine for Torque Ripple Minimization
Design, Analysis and Application of Advanced Magnetless Machines on Wind Power Generations
Proposed Flux-Reversal DC-Field Machine for Wind Power Generation
Proposed Dual-Mode Machine for Wind Power Harvesting
A Comprehensive Study of Advanced Magnetless Machines on Electric and Hybrid Vehicles
Proposed Axial-Field Machine for Range-Extended Electric Vehicles
Proposed Reliable Gearless Machine for Magnetic Differential System
Proposed Electronic-Geared Machine for Electric Vehicle Applications
Conclusions and Future Works.