NDLI: High efficiency buck and boost type AC-AC converters

Content Provider	IEEE Xplore Digital Library
Author	Khan, A.A. Honnyong Cha Ahmed, H.F.
Copyright Year	2015
Description	Author affiliation: Power Electron. & Energy Conversion Lab., Kyungpook Nat. Univ., Daegu, South Korea (Khan, A.A.; Honnyong Cha; Ahmed, H.F.)
Abstract	In this paper, buck and boost type AC-AC converters are proposed which are derived from the recently developed switching cell (SC) AC-AC converters. The volume of magnetic components of the SC AC-AC converters is large, and they are also associated with circulating current. The proposed AC-AC converters are free of circulating current and have smaller magnetic volume, therefore they can realize high efficiency. In addition, the proposed converters can effectively eliminate the loss due to revere recovery of body diode of MOSFETs, therefore they can make best use of power MOSFETs and fast freewheeling diodes which allow the proposed converters to get higher efficiency by reducing losses. The proposed converters are free of commutation problem, because the dead and overlap time cannot damage its switching devices. Furthermore, the proposed converters are not require to use sensing modules or resistive snubbers for commutation, and therefore they can be adopted with highly distorted input voltage and inductive load. A 250 W prototype of proposed boost type converter is tested to verify the analysis and operation of the proposed converters. It is found from the experimental results that the proposed boost type converter can get 97.7% efficiency for 50 kHz switching frequency.
Starting Page	1
Ending Page	10
File Size	379416
Page Count	10
File Format	PDF
e-ISBN	9789075815221
DOI	10.1109/EPE.2015.7309136
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-08
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	EPE Association and IEEE
Subject Keyword	efficiency Pulse Width Modulation (PWM) AC-AC converters Snubbers Switches reliability Logic gates Pulse width modulation AC-AC converter renewable energy systems Inductors Switching circuits
Content Type	Text
Resource Type	Article

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