Soft-switched high power factor boost type AC/DC converter and its fundamental analysis

Author

Nagao, Michihiko ; Harada, Koosuke

Author_Institution

Energy Electron. Lab., Kumamoto Inst. of Technol., Japan

Volume

2

fYear

1999

fDate

1999

Firstpage

681

Abstract

By a combination of a lossless snubber and a sensor for the current or voltage, soft-switched high power factor AC/DC converters are realized by a simple circuit construction. These converters need twice the input peak voltage for soft switching. In this paper, a new technique to spread the range of the soft switching is proposed. To derive circuit characteristics such as the power factor and output voltage as functions of the circuit parameters, a nonlinear differential equation for the output voltage is given and solved under the proper assumptions. These analytical results are then verified by the experiments

Keywords

AC-DC power convertors; harmonic distortion; nonlinear differential equations; power conversion harmonics; power factor correction; rectifying circuits; snubbers; switching circuits; circuit characteristics; current sensor; fundamental analysis; lossless snubber; nonlinear differential equation; output voltage; power factor; simple circuit construction; soft switching range; soft-switched high-power factor boost-type AC/DC power converter; voltage sensor; Capacitors; Circuits; Current transformers; DC-DC power converters; Inductors; Reactive power; Snubbers; Switches; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE

Conference_Location

Charleston, SC

ISSN

0275-9306

Print_ISBN

0-7803-5421-4

Type

conf

DOI

10.1109/PESC.1999.785583

Filename

785583