Simple topologies of PWM AC-AC converters

Author

Peng, Fang Zheng ; Chen, Lihua ; Zhang, Fan

Author_Institution

Dept. of Electr. Eng. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA

Volume

1

Issue

1

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

10

Lastpage

13

Abstract

This letter proposes a new family of simple topologies of PWM AC-AC converters with minimal switches. With extension from the basic DC-DC converters, a series of AC-AC converters such as buck, boost, buck-boost, Cuk, and isolated converters are obtained. By PWM duty ratio control, they become a "solid-state transformer" with a continuously variable turns ratio. All the proposed AC-AC converters in this paper employ only two switches. Compared to the existing circuits that use six switches or more, they can reduce cost and improve reliability. The operating principle and control method of the proposed topologies are presented. Analysis and simulation results are given using the Cuk AC-AC converter as an example. The analysis can be easily extended to other converters of the proposed family.

Keywords

AC-AC power convertors; PWM power convertors; reliability; transformers; Cuk AC-AC converter; Cuk converters; PWM AC-AC converters; PWM duty ratio control; boost converters; buck converters; buck-boost converters; cost reduction; isolated converters; power line conditioning; reliability improvement; solid-state tansformer; solid-state transformer; Analytical models; Circuit topology; Costs; DC-DC power converters; Pulse width modulation; Pulse width modulation converters; Solid state circuits; Switches; Switching circuits; Switching converters;

fLanguage

English

Journal_Title

Power Electronics Letters, IEEE

Publisher

ieee

ISSN

1540-7985

Type

jour

DOI

10.1109/LPEL.2003.814961

Filename

1225180