锁相环在智能超声电源中的应用  

The Application of PLL for Intelligent Ultrasonic Power

作　　者：黄文剑[1] 蔡锦恩[1] 

机构地区：[1]杭州电子科技大学机电工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2005年第4期9-11,共3页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(50275043)

摘　　要：简要介绍了锁相环的工作原理,并采用PIC16C73单片机、8254可编程计数器、74HC4046合成了分辨率为4Hz的超声频率,单片机通过检测超声电源负载的电流、电压相位差来改变74HC4046的输出频率,以达到跟踪振动系统的谐振频率的目的。The principle of PLL is introduced in this paper. Based of PLL, we synthesize a kind of ultrasonic frequency with capture ratio of 4HZ by PIC16C73, 8254 and 74HCA046. Single- chip computer changes output frequency of 74HCA046 by detecting phase difference of current and voltage of load. Making use of this way, the syntonic frequency of vibration system is tracked accurately.

关 键 词：锁相环 超声电源 自动跟踪 

分 类 号：TM921.52[电气工程—电力电子与电力传动]