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Circuit Structure and Control Method to Reduce Size and Harmonic Distortion of Interleaved Dual Buck Inverter

Title
Circuit Structure and Control Method to Reduce Size and Harmonic Distortion of Interleaved Dual Buck Inverter
Authors
Cho, Min-GiLee,Sang-HoonLee,Hyeon-SeonkChoi, Yoon-GeolKANG, BONG KOO
Date Issued
Mar-2020
Publisher
MDPI
Abstract
A new circuit structure and control method for a high power interleaved dual-buck inverter are proposed. The proposed inverter consists of six switches, four diodes and two inductors, uses a dual-buck structure to eliminate zero-cross distortion, and operates in an interleaved mode to reduce the current stress of switch. To reduce the total harmonic distortion at low output power, the inverter is controlled using discontinuous-current-mode control combined with continuous-current-mode control. The experimental inverter had a power-conversion efficiency of 98.5% at output power = 1300 W and 98.3% at output power = 2 kW, when the inverter was operated at an input voltage of 400 V-DC, output voltage of 220 V-AC/60 Hz, and switching frequency of 20 kHz. The total harmonic distortion was < 0.66%, which demonstrates that the inverter is suitable for high-power dc-ac power conversion.
Keywords
DEAD-TIME COMPENSATION; PWM INVERTERS; SINGLE
URI
http://oasis.postech.ac.kr/handle/2014.oak/101943
ISSN
1996-1073
Article Type
Article
Citation
ENERGIES, vol. 13, no. 6, 2020-03
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 KANG, BONG KOO
Dept of Electrical Enginrg
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