数字开关功率放大器动态性能分析与实验验证  

Dynamic Performances Analysis and Experimental Verification of the Digital Switching Power Amplifier

作　　者：王森 朱高峰 程鑫[2,3] 程百新 WANG Sen;ZHU Gaofeng;CHENG Xin;CHENG Baixin(TPV Display Technology(Wuhan)Co.Ltd.,Wuhan 430070,China;School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Provincial Engineering Technology Research Center for Magnetic Suspension,Wuhan 430070,China)

机构地区：[1]冠捷显示科技(武汉)有限公司,湖北武汉430058 [2]武汉理工大学机电工程学院,湖北武汉430070 [3]湖北省磁悬浮轴承工程技术研究中心,湖北武汉430070

出　　处：《数字制造科学》2020年第3期194-199,共6页

基　　金：国家自然科学基金资助项目(51205300);国家自然科学基金资助项目(51575411)

摘　　要：针对基于数字信息处理器DSP实现的数字开关功率放大器,分析了其总体构成结构与电流的变化过程;用阶跃信号激励下的上升时间、超调量以及输出纹波精度特性来描述其动态特性,并从理论上分析了母线电压、PI参数、调制频率和负载特性对上述动态性能的影响机理;最后搭建了实验平台,并用单一变量法进行验证,为数字开关功率放大器的参数设计提供了方法。In this paper,the configuration structures and the change process of current are analyzed for the digital switching power amplifier based on DSP.The rising time,overshoot,and output current ripple accuracy under the step signal excitation are used to describe its dynamic characteristics.The influence mechanism of bus bar voltage,in terms of PI parameters,modulation frequency,and load characteristics on the dynamic performance has been experimentally verified.The study of this paper provides a method for the parameter design of digital switching power amplifier.

关 键 词：数字功率放大器 动态性能 数字信号处理器(DSP) PWM调制 

分 类 号：TN722.75[电子电信—电路与系统]