Hybrid multi-carrier PWM technology based on carrier reconstruction

被引：0

作者：

Ye M.-Y. ^{[1
]}

Chen L. ^{[1
]}

Kang L.-X. ^{[1
]}

Zhang J.-F. ^{[1
]}

Wu H. ^{[1
]}

机构：

[1] School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2020年 / 24卷 / 10期

关键词：

Carrier reconstruction; Cascaded H-bridge; Harmonic analysis; Hybrid multi-carrier PWM; Multilevel inverter; Power balance;

D O I：

10.15938/j.emc.2020.10.007

中图分类号：

学科分类号：

摘要：

The carrier phase shift PWM (CPS-PWM) and in-phase disposition PWM (IPD-PWM) modulation technologies are applied to cascaded H-bridge. The H-bridge (CHB) inverter has the problems of poor output voltage harmonic performance and unbalanced output power. To reconstruct the triangular carrier in CPS-PWM technology, a hybrid multi carrier PWM modulation technology based on carrier reconstruction is proposed. The triangle carrier in CPS-PWM was replaced by the waist of small triangle which was vertically stacked in IPD-PWM technology. Based on the state space average method, the fundamental amplitude of the output voltage of the inverter and the output voltage of each cascade unit under the reconstructed carrier were calculated, and compared with the output voltage of the inverter under the CPS-PWM and IPD-PWM technologies. Taking the seven-level CHB inverter as an example, the simulation and experimental results show that the harmonic performance of output line voltage is exactly the same as that of IPD-PWM, and the equivalent switching frequency of the inverter can be increased and the power between cascaded cells can be naturally balanced as that of CPS-PWM, and the fundamental amplitude of output voltage is also the same as that of IPD-PWM and CPS-PWM technology. © 2020, Harbin University of Science and Technology Publication. All right reserved.

引用

页码：59 / 68

页数：9

共 14 条

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