摘要
随着工业的发展,同步电机由于其功率因数超前、可以向电网提供无功功率,从而提高电网功率因数、运行转速稳定、低转速设计简单等优点,被越来越多地应用于空气压塑机,球磨机等需要大容量电机的场合。介绍了多重电压高压变频的原理及其优点,分析了在多重电压型高压变频调速系统中同步电机的变频启动方式,研究了同步电机在稳态运行时的励磁控制。
With the development of industrial,synchronous motor has been widely used in the occasions needing large-capacity such as air pressure presses,ball mills because its high power factor,stable rotation speed,simple design while low speed and other advantages.First of all,the paper describes the principle and advantages of the high voltage frequency conversion base on cascaded multilevel.Secondly,it analyses the frequency conversion startup of the large capacity synchronous motor based on cascaded multilevel.Lastly,it researches the control of excitation system while synchronous motor is in steady-state.
出处
《信息技术》
2010年第11期40-43,共4页
Information Technology
关键词
多重电压
同步电机
变频启动
励磁控制
cascaded multilevel
synchronous motor
frequency conversion startup
control of excitation system
