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A novel synchronous PWM method for three-phase AC/DC/AC converter without DC-link capacitor

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4 Author(s)
Congwei Liu ; Key Lab. of Power Electron. & Electr. Drive, Inst. of Electr. Eng., Beijing, China ; Zhandong Sun ; Ningzi Cheng ; Yaohua Li

Three-phase AC/DC/AC converter without DC-link capacitor provides decreased switching loss on inverter side of the converter, in the price of slightly increased conduction loss on additional four diodes. Comparing with conventional back-toback PWM converter, the total efficiency of the AC/DC/AC converter can be con or pro, depending on the operation conditions of the both converters. This paper proposed a novel synchronous PWM algorithm for rectifier and inverter side of the AC/DC/AC converter, by which the high efficiency operation of the converter is extended from high power factor load to any power factor load in inverter side.

Published in:

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society

Date of Conference:

25-28 Oct. 2012