摘要
对利用锁相环的原理使变频电源快速跟踪并锁定到工频电源上的方法进行了深入的研究,给出了工业环境下的电路实施框图,并对系统的传递函数进行了分析。根据功能,认为变频器输出电压滤波器的传递函数需要使用群时延概念,为更精确地分析这类问题提供了依据。控制实验表明,从起动到同步建立的时间在100 MS以内。
Deep research has been launched on the method of synchronizing VFD＇s output to the power line. A practical circuit for industry circumstances is put out. The system＇ s transfer function is analyzed, especially the one of the filter which is connected between VFD and the phase detector, and it should be established on the group delay concept. This offers the basis on which analyses can be processed more accurately. Experiments show that the synchronizing procedure is less than 100 ms.
出处
《电机与控制学报》
EI
CSCD
北大核心
2005年第5期436-438,442,共4页
Electric Machines and Control
关键词
变频器
锁相环
同步切换
正弦脉宽调制
群时延
variable frequency device
phase locked loop
synchronized transfer
spwm
group delay
