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基于单片机的UPS数字化锁相技术
引用本文:曹凤香,罗昉,康勇.基于单片机的UPS数字化锁相技术[J].电力电子技术,2007,41(6):86-88.
作者姓名:曹凤香  罗昉  康勇
作者单位:华中科技大学,湖北,武汉,430074
摘    要:为了使运行中的不间断电源(UPS)保持输入、输出的电压、频率和相位一致性,结合锁相环原理,并利用单片机实现了高精度的数字锁相环.通过捕获中断和周期中断获取的输入、输出相差,经过分段式变PI控制器,计算出载波周期的补偿量,采用分组线性插补再调制技术,改变了每个载波周期值,从而实现了高精度数字锁相功能.在此,给出了硬件实现电路及软件流程图.通过实验验证了该方案的可行性.

关 键 词:不间断电源  数字  锁相环控制
文章编号:1000-100X(2007)06-0086-03
修稿时间:2006-09-11

Digital Phase-Lock Technology for UPS based on MCU
CAO Feng-xiang,LUO Fang,KANG Yong.Digital Phase-Lock Technology for UPS based on MCU[J].Power Electronics,2007,41(6):86-88.
Authors:CAO Feng-xiang  LUO Fang  KANG Yong
Affiliation:Huazhong University of Science and Technology, Wuhan 430074, China
Abstract:In order to realize the frequency and phase of output voltage synchronized with input voltage when UPS works,in the paper,a digital phase locked loop based on MCU with high precision is presented.The phase error between output and input voltage is received by capture interrupt and period interrupt of MCU,a alterable PI controller is applied to calculate a compensation value of carried period which is changed by grouped linear interpolation remodulation tech-nique,and the high precision digital phase locked function is realized.The circuit and the flow chart of program are given.Experi-ment result proves the scheme is feasible.
Keywords:uninterrupted power supply  digital  phase-locked coop control
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