【摘要】 为了提高大型汽轮发电机组励磁系统的运行可靠性和响应速度,我们研制了一台70千伏安、400赫芝,3000转/分的稀土永磁发电机,作为副励磁机。在研制过程中,设计了新颖的混合式磁路结构;推导了与之相应的电磁场分析与等效磁路相结合的计算公式。从而,既保证了所要求的技术性能,又减少了稀土永磁体的用量。与另一台铝镍钴副励磁机相比,其技术经济性能是优越的。这台作为典型机的稀土永磁励磁机的研制成功,将促进容量达数百千瓦的更大容量稀土永磁发电机的发展。更多还原

【Abstract】 In order to increase the reliability of the excitation system for large turbogenerator and improve its response,a 70 KVA, 3,000 rpm and 400 Hz rare earth-cobalt permanent magnet (REPM) generator has been built as a pilot exciter. A new type of composite magnetic circuit structure has been developed. The calculation formula based upon the electromagnetic field analysis in combination with the epuivalent magnetic circuit analysis relevant to this design have been derived.It ensures the specified technical performance and decreases the amount of Permanent magents. Compared with an Alnico exciter, the technical and economical features of the REPM exciter have been found to be excellent. The successful development of this REPM exciter,as a typical machine, will contribute to the production of the REPM generators of still higher rating up to hundreds KVA.更多还原