指挥控制与仿真2013，Vol.35Issue(1)：135-140,6.DOI:10.3969/j.issn.1673-3819.2013.01.031
多电平D类功率放大器的工作原理
Cascade Multilevel Class-D Power Amplifier With the Carrier-Based Phase-Shifted Modulation
摘要
Abstract
A novel switch-mode power amplifier based on a cascade multicell multilevel circuit topology is introduced. By applicating of the multicell topology concept being operated in a unipolar phase-shifted PWM control switch-mode amplifier system, the effective switching of output results is 2N times the switching frequency of each full-bridge. Due to the Carrier-Based phase-shifted modulation of the individual switching cells, the output voltage ripple of the total system is considerably small. The paper analyzes the advanced characteristic of cascade multilevel technique. Two carrier-based PWM schemes, phase-shifted and level-shifted modulations are analyzed and their performance is compared, and then a cascade multilevel class-D power amplifier is built in the laboratory. The results of measurements show an excellent response and stability.关键词
D类功率放大器/多电平控制/相移PWM模式Key words
class-D amplifiers/ multilevel control/ phase-shifted PWM modulation分类
信息技术与安全科学引用本文复制引用
宋昕,张缨,徐鲁威,董明..多电平D类功率放大器的工作原理[J].指挥控制与仿真,2013,35(1):135-140,6.
