Abstract
An interleaved pulse width modulation (PWM) can be employed in a parallel operation of three-phase converters because the interleaved PWM increases the equivalent switching frequency and significantly enhances the output current harmonics. However, interleaved voltage pulse patterns provoke a huge circulating current, and a coupled inductor is employed to suppress the circulating current. Therefore, this study aims to improve the harmonics of voltage and current in parallel operation with a coupled inductor. For the aim, the harmonics of the interleaved PWM have been analyzed. Based on the analysis, a new PWM strategy has been devised by modifying the interleaved carrier. The proposed PWM improves the harmonics of voltage and current. However, unintended additional device switching occurs in the proposed method. Accordingly, a cost index (CI) is defined to show the improvement in the harmonics considering the additional device switching. The validity, feasibility, and effectiveness of the proposed method have been demonstrated by using CI. As a result, the computer simulation and experimental results show that the proposed PWM has efficiently improved the harmonics in various modulation indices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
