Power factor improvement and closed loop control of an AC-to-DC resonant converter

Author

Suryawanshi, H.M. ; Thakre, K.L. ; Tarnekar, S.G. ; Kothari, D.P. ; Kothari, A.G.

Author_Institution

Dept. of Electr. Eng., Visvesvaraya Regional Coll. of Eng., Nagpur, India

Volume

149

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

101

Lastpage

110

Abstract

This paper presents the characteristics and dynamic performance of a modified series-parallel resonant converter (MSPRC) with a capacitive output filter and operating on the utility line. The power factor of this converter is very high, even with no active control of the input line current. Fixed frequency control is used to regulate the magnitude of the output voltage and power. The sampled-data modelling technique of the MSPRC is used along with a small signal model to achieve excellent voltage regulation. The HF transformer nonidealities (i.e. leakage inductance and winding capacitance) are used as part of a resonant tank circuit. Thus, this converter is most suitable for high-voltage DC applications. Based on complex AC circuit analysis, the AC-to-DC MSPRC is designed for a 500 W, 1 kV output rating. Finally, simulation results are compared with experimental results

Keywords

AC-DC power convertors; closed loop systems; control system analysis; control system synthesis; high-frequency transformers; power factor correction; rectifying circuits; resonant power convertors; transformer windings; voltage control; 1 kV; 500 W; AC circuit analysis; AC-DC resonant converter; HF transformer nonidealities; characteristics; closed loop control; dynamic performance; modified series-parallel resonant converter; power factor improvement; resonant tank circuit; sampled-data modelling technique; voltage regulation;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20020288

Filename

997800