一种三级式同步电机起动过程励磁控制方法  

Excitation method in starting process for three-stage brushless synchronous machine

作　　者：马鹏[1] 刘卫国[1] 毛帅[1] 彭纪昌[1] 骆光照[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《电机与控制学报》2014年第10期68-73,80,共7页Electric Machines and Control

基　　金：国家自然科学基金(51277152)

摘　　要：为解决三级式同步电机在起动过程中所面临的主发电机转子励磁问题,分析励磁机分别采用单相交流励磁方式和直流励磁方式时,主发电机励磁电流随转速的变化特性,并根据Matlab的仿真结果,结合电机实验数据,提出一种应用于三级式同步电机起动过程的励磁机控制策略;为实现该控制策略中提出的交/直流励磁的过渡切换方法,分析了励磁机控制器逆变回路的开关状态及输出电压矢量的合成方式,提出一种单相交流/直流励磁一体化调制算法,解决了励磁机在起动过程中的励磁方式平稳切换问题。实验结果表明了所提出的励磁控制策略和调制算法的有效性。Considering the excitation switch problems in the starting process of three-stage brushless synchronous machine,characteristics of the excitation current of the main generator vs speed were analyzed when AC excitation mode and DC excitation mode applied in the exciter respectively.Based on the Matlab simulation results and the experiment data,an exciter control strategy in the starting process of motor was given.In order to realize the AC and DC switching method in this control strategy,the switch-status of the inverter circuit and the resultant method of output voltage vectors were analyzed.An integrated single phase AC/DC excitation modulation algorithm was proposed to realize the smooth switch between AC excitation mode and DC excitation mode.Experiment results verify the validity of the proposed excitation control strategy and modulation algorithm.

关 键 词：三级式同步电机 航空发动机起动 励磁控制 励磁切换 单相交流励磁 直流励磁 

分 类 号：TM341[电气工程—电机]