DC Components and Subharmonics of Carrier-Based PWM

被引：0
|
作者：
Halasz, Sandor [1 ]
机构：
[1] Budapest Univ Technol & Econ, Dept Elect Power Engn, Budapest, Hungary
来源：
2012 15TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (EPE/PEMC) | 2012年
关键词：
Regular and natural PWM; DC component; Subharmonics;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
the use of ultra high speed ac drives has started in the last years e. g. in waste energy recovery systems. In these drives the ratio of the carrier frequency to fundamental one can be lower than 10 - 12. In this case the dc components and subharmonics of carrier-based PWM can have considerable negative effect on the quality of the drive. It is observed that the dc components occur only in case of naturally sampled PWM and they are absent in case of regular PWMs. The expressions for computation of dc voltage and subharmonics of naturally sampled sinusoidal PWM are given and it is observed that in case of space vector modulation the dc components' value is higher than in case of sinusoidal PWM. The theoretical results are confirmed by experiments.
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页数：7
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