The Analyzing Of A Cascaded Multilevel Class-D Power Amplifier With the Carrier-Based Phase-Shifted Modulation

摘要：

This paper presents a switch-mode power amplifier based on a cascaded multicell multilevel circuit topology. Amplifiers based on the single-phase inverter topology or H-bridge is most easily accomplished by the direct series, or parallel, connection of multiple H-bridge power-stages. Operating these with the phase-shifted PWM control gives higher output power and produces an improved output voltage spectrum and significantly lowers output current-ripple. Two carrier-based PWM schemes, phase-shifted and level-shifted modulations, are analyzed and their performance is compared. A multilevel class-D amplifiers mathematic model is analyzed. The results of measurements taken from a laboratory setup are presented which prove the proposed amplifier improves the dynamic system behavior and have wide bandwidth.

关键词： Class-D amplifiers Multilevel Phase-shifted PWM Modulation

作者: YingZhang MingDong LingCa QingdeMeng

作者单位: China Marine Development & Research Center Beijing, China China Marine Development & Research Center Beijing, Chinai

会议类型: 国际会议

会议名称: 2011 International Conference on Electronic & Mechanical Engineering and Information Technology(EMEIT 2011)(2011年机电工程与信息技术国际会议)

会议地点: 哈尔滨

会议语种:英文

页码: 1283-1286

在线出版日期: 2011-08-12（万方平台首次上网日期，不代表论文的发表时间）