三级励磁的六相电机直流发电系统研究  

Research on DC Power System with Three-stage Excited Six-phase Generator

作　　者：王伟华[1] 肖曦[1] 

机构地区：[1]清华大学,北京100084

出　　处：《电力电子技术》2011年第2期35-37,共3页Power Electronics

摘　　要：三级励磁的六相电机直流发电系统的时间常数较大,采用传统的基于电压闭环的控制方法,调节性能不太理想,主要表现在建压、加卸载等暂态过程中输出电压存在较大的过冲或振荡。对励磁机励磁电流进行直接控制是提高输出电压动态控制性能的有效方法,为此提出一种基于励磁机励磁电流闭环的控制方法。仿真和实验表明,引入励磁电流闭环控制可实现快速、无超调地建压,能对负载突变等暂态过程进行良好的控制。This paper deals with the control of a three-stage brushless DC generator.Due to its big time-constant,the results show that the transient performance is not perfect enough if traditional PI algorithm based on output direct voltage is adopted.To avoid great voltage disturbance, a PI algorithm based on the exciting current of the exciter is proposed.The simulation result shows that the method put forward brings great improvement on the voltage set up process,and better dynamic performance is expected during load sudden change.The experiments also verify the effectiveness of the proposed method.

关 键 词：无刷直流发电机 电压超调 负载突变 软启动 

分 类 号：TM33[电气工程—电机]