Mechanical Design and Simulation for Axial-field Permanent-magent Direct Current Generator

　　Mechanical Design and Simulation for Axial-field Permanent-magent Direct Current Generator
　　Since the global warming effect and the energy crisis, renewable energy such as tide energy, wind energy, and solar energy has become more and more important. Thus, wind power generation with outstanding performance in energy generation, has become research Special shape NdFeB magnets emphasis in many countries. Specially, the direct-drive, variable-speed, constant-frequency generation technology is paid great attention for its relatively high efficiency.The axial-field permanent-magnet direct current generator is well known for compact structure, excellent ventilation, and high efficiency. The generator is often driven directly by windmill, which means that it is extremely suitable for direct-drive variable-speed constant-frequency wind turbine.In this thesis, the axial-field permanent-magnet direct current generator is mainly discussed combined with the traditional wind power technology. The key items are as follows:(1) Background information collecting part contains summary of the research status of the wind power generator and introductions about the history and future of the axial-field permanent-magnet direct current generator.(2) Theory preparation http://www.999magnet.com part includes study in the structure, principle, and electromagnetism theory of the axial-field permanent-magnet direct current generator. The feasibility and superiority of the generator is explained.(3) The parameter calculation part contains the parameter calculation and design using equivalent magnetic current analytical method.(4) The simulation part: Ansoft Maxwell 3D has been using to analyze the static electromagnetic field and transient electromagnetic field of the generator. The detail-included result is then compared with the ideal parameter calculated in chapter 3.