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A new t-type direct AC/AC converter

Khodabandeh, M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1109/PEDSTC.2015.7093282
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2015
  4. Abstract:
  5. In this paper a novel T type scheme for 1-phase direct ac/ac converters is proposed. In this topology, frequency changing takes place directly (without common DC voltage bus) through three converters that are connected in a T structure. Unity power factor and precise output voltage regulation is achieved through appropriate control of these three converters. H-bridge converters are implemented, as the basic unit, in each branches of T to make the proposed converter. The converter is controlled such that the average active power of each H-bridges remains zero. So capacitors are implemented in DC links of H-bridges. In comparison to conventional back-to-back converters, life time of each capacitor increases due to capacitor current ripples reduction. Principle of operation and control scheme is explained. Simulation results verify performance of the converter while operating as a power supply at different frequencies
  6. Keywords:
  7. AC-AC power converters ; Active filters ; Capacitors ; Electric power factor ; Power electronics ; Voltage regulators ; AC/AC converter ; Back-to-back converter ; Different frequency ; Direct AC/AC converters ; frequency changing converter ; Operation and control ; Output voltage regulation ; Unity power factor ; Power converters
  8. Source: 6th Annual International Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2015, 3 February 2015 through 4 February 2015 ; February , 2015 , Pages 247-252 ; 9781479976539 (ISBN)
  9. URL: http://ieeexplore.ieee.org/document/7093282/?arnumber=7093282