An improved three-level LCC converter with a novel control strategy for high-frequency high-power-density capacitor-charging power supplies

Author

Fu, Dianbo ; Qiu, Yang ; Lu, Bing ; Wang, Fred ; Lee, Fred C.

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

2006

Abstract

In this paper, the power factor concept of resonant converters is proposed and analyzed. A novel constant power factor control scheme for high-frequency high-power-density charging applications is proposed and studied. Based on this control scheme, the circulating energy of resonant converters is considerably reduced. Low switching losses are also achieved with very low turn off current. High efficiency can be obtained for high-frequency high-power (several kilowatts) charging applications. A 700 kHz, 10 kV three-level LCC resonant converter is designed to validate the proposed control scheme. The power density of 50W/inch³ is achieved with over 88% efficiency at full load.

Keywords

power capacitors; power factor; power system control; resonant power convertors; switched mode power supplies; 10 kV; 700 kHz; 88 percent; capacitor-charging power supply; high-frequency charging; high-frequency power supply; high-power charging; high-power-density power supply; low switching loss; power factor concept; resonant converters; three-level LCC converter; Capacitors; Power conversion; Power generation; Power supplies; Pulse power systems; Pulsed power supplies; Reactive power; Resonance; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2006. APEC '06. Twenty-First Annual IEEE

Print_ISBN

0-7803-9547-6

Type

conf

DOI

10.1109/APEC.2006.1620723

Filename

1620723