无刷励磁是同步发电机励磁系统的一种重要发展,是励磁技术的一项重大改革。由于这种励磁方式把“无刷”结构(取消滑环和炭刷)和半导体技术相结合,因而具有无火花、无机械磨损、运行可靠、维修工作量小、调节性能好、以及便于加工等优点。此外,直流励磁机,在现场条件下,极易改造为交流励磁机,因而把无刷励磁技术应用来改造废旧励磁系统,同样可以获得相当大的技术经济效益。 Brushless excitation is an important development of synchronous generator excitation system and is a major reform of excitation technology. Since this excitation method combines a “brushless” structure (slip ring and carbon brush) with semiconductor technology, it has no sparking, no mechanical wear, reliable operation, small maintenance workload, good adjustability and ease of processing advantage. In addition, the DC exciter can be easily transformed into an AC exciter under field conditions. Therefore, applying the brushless excitation technology to rebuild the waste exciter system can also obtain considerable technical and economic benefits.