摘要
随着工业的发展,同步电机因其功率因数超前、可以向电网提供无功功率,从而提高了电网功率因数,具有运行转速稳定、低转速设计简单等优点,被越来越多的应用于空气压塑机、球磨机等需要大容量电机的场合。本文介绍了多重电压高压变频的原理及优点,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起动方式,研究了同步电机在稳态运行时的励磁控制。
With the development of industy,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 principle and advantages of the high voltage frequency conversion based on cascaded multilevel are described.Secondly,the frequency conversion starting of the large capacity synchronous motor is analyzed.It researches the control of excitation system while synchronous motor is in steady-state.
出处
《电气传动自动化》
2010年第5期1-4,共4页
Electric Drive Automation
关键词
多重电压
同步电机
变频起动
励磁控制
cascaded multilevel
synchronous motor
frequency conversion starting
control of excitation system
