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About this book

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.

Table of Contents

Frontmatter

2018 | OriginalPaper | Chapter

Chapter 1. Introduction

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 2. Overview of Magnetless Doubly Salient Brushless Machines

Christopher H. T. Lee

Modeling, Numerical Analysis and Experimental Verification of Torque Improving Topologies

Frontmatter

2018 | OriginalPaper | Chapter

Chapter 3. Multi-tooth Machines—Design and Analysis

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 4. Double-Rotor Machines—Design and Analysis

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 5. Development of Singly Fed Mechanical-Offset Machine for Torque Ripple Minimization

Christopher H. T. Lee

Design, Analysis and Application of Advanced Magnetless Machines on Wind Power Generations

Frontmatter

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Chapter 6. Proposed Flux-Reversal DC-Field Machine for Wind Power Generation

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 7. Proposed Dual-Mode Machine for Wind Power Harvesting

Christopher H. T. Lee

A Comprehensive Study of Advanced Magnetless Machines on Electric and Hybrid Vehicles

Frontmatter

2018 | OriginalPaper | Chapter

Chapter 8. Proposed Axial-Field Machine for Range-Extended Electric Vehicles

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 9. Proposed Reliable Gearless Machine for Magnetic Differential System

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 10. Proposed Electronic-Geared Machine for Electric Vehicle Applications

Christopher H. T. Lee

2018 | OriginalPaper | Chapter

Chapter 11. Conclusions and Future Works

Christopher H. T. Lee
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