Selection of Carrier Waveforms for PWM Inverter

作     者：陈国呈 屈克庆 许春雨 孙承波 CHEN Guo-cheng;QU Ke-Qing;XU Chun-yu;SUN Cheng-bo

作者机构：School of Electromechanical Engineering and Automation Shanghai UniversityShanghai 200072 China 

出 版 物：《Journal of Shanghai University(English Edition)》 (上海大学学报（英文版）)

年 卷 期：2003年第7卷第4期

页      面：389-394页

学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：theNationalNaturalScienceFoundationofChina (GrantNo .5 99770 12 )andDeltaPowerElectronicsRe search&EducationFoundation 2 0 0 2 

主　　题：hard-switching soft-switching resonance zero voltage switching zero current switching dead time. 

摘      要：In this paper the influence of different carrier waveforms upon the output characteristics of PWM inverter is described in detail. When a triangular carrier waveform is used in hard-switching PWM inverters, harmonics exist in the neighborhood of the output frequency of the inverter output voltage and current due to the dead time. The triangular carrier waveform used in soft-switching PWM inverter will cause difficulties in controlling resonance-trigger time, higher loss in the resonant circuit, and less utilization of the DC bus voltage. If a sawtooth carrier is used in hard-switching PWM inverter, there will be severe distortion in the current waveform. When sawtooth carriers with alternate positive and negative slopes are used in soft-switching PWM inverters, the resonance-trigger time is easy to control, and distortion in the output voltage and current caused by the dead time will not appear.