本文研究了数字式励磁控制器的原理，提出了高性能的数字式励磁控制器的设计方案。硬件方案采用MCU 建立高性能的硬件平台。软件方案采用同步交流采样算法，为高性能励磁控制提供精确的实时参数，励磁控制算法采用CMAC 神经网络＋经典的PID 控制智能算法，实现了很好的动态响应。关键词：柴油发电机组；数字励磁控制；PID；CMAC算法Abstract: This paper studies the digital excitation controller, and presents a high-performancedigital excitation controller design. MCU hardware has been used to establish high-performance hardware platform. Synchronous sampling algorithm for high-performance excitation control provides accurate real-time parameters. The excitation control algorithm uses the CMAC nerve network and PID intelligence control algorithm，and achieve a good dynamic response.Key words：Diesel generators; Digital Excitation; PID;CMAC algorithm