Characteristics of a New Series-Resonant Converter with a Parallel Resonant Circuit

Author

Kuwata, Yutaka ; Ohashi, Yasuo ; YOtsumoto, Katsuichi

Author_Institution

NTT Electrical Communications Laboratories, 3-9-11, Midori-cho, Musashino-shi, Tokyo, 180 JAPAN

fYear

1987

fDate

14-17 June 1987

Firstpage

204

Lastpage

210

Abstract

Conventional series-resonant converters suffer from wide variations in conversion frequency during constant voltage regulation, resulting in audible noise under light-load conditions. A new series-resonant converter has been developed in order to eliminate this problem. The converter uses a parallel resonant circuit with a resonant frequency of over 20 kHz installed in series with the load circuit. The output voltage is thus regulated by varying the conversion frequency in a higher area than that of a conventional series-resonant converter. An efficient, lightweight small-sized rectifier is developed using this new series-resonant converter. The rectifier unit can convert 200-volt AC to 48-volt DC and is capable of supplying an output current of 30 amps. Efficiency for 50 to 100% output current is 92%. The new rectifier is also free from any audible noise.

Keywords

Capacitors; Clamps; Diodes; Frequency conversion; RLC circuits; Rectifiers; Resonance; Resonant frequency; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1987. INTELEC '87. The Ninth International

Conference_Location

Stockholm, Sweden

Print_ISBN

91-7810-916-7

Type

conf

DOI

10.1109/INTLEC.1987.4794555

Filename

4794555