Influence of Slotting Structure Design on Cogging Torque in Inset Permanent Magnet Synchronous Generator
| Autor: | TAJUDDIN NUR, 陳玉成 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 Inset-Permanent Magnet Synchronous Generator is one of electrical machines which has been used in wind turbine generator. The advantage of using Inset-Permanent Magnet Synchronous Generator structure is the fact that the permanent magnets are placed in the rotor core hub in Inset System, so that the construction become stronger compared with the surface system and used as direct driven. However, the problem of cogging torque is still challenging, which has negative effects leading to vibrations, noise and bad performance. Many cogging torque reduction methods have been reported but less effective in cogging torque reduction, especially for wind turbine generator applications. The literature review examined different methods in detail but gave special focus on magnet structures, slot and pole combination, as well as types of magnet design. This dissertation proposed an integration concept of five cogging torque reduction methods such as fractional slot number, bread loaf magnet, optimized pole arc, magnet shape and magnet edge slotting. Two stage design process of the Inset-Permanent Magnet Generator is proposed based on the fractional slot number and bread-loaf design. A two-step of slotting in the magnet edge and magnet shaping with optimized pole arc can achieve cogging torque reduction as much as 99.64 % of the rated torque by using the design of experiment method. Finally magnetic shaping in the surface of the proposed magnet is redesigned for curvier edge. The simulation tool used to investigate the proposed structure is Finite Element Method Magnetics (FEMM) |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|