Pulse frequency modulation LLC series resonant X-ray power supply

Author

Zhang, Zhengmao ; Tang, Zhide

Author_Institution

Coll. of Electr. Eng., Chongqing Univ., Chongqing, China

fYear

2011

fDate

16-18 April 2011

Firstpage

1532

Lastpage

1535

Abstract

To broaden the output voltage adjustment range of the X-Ray high voltage dc power supply and to make control circuit simple, a high frequency high voltage X-ray power supply with full bridge LLC (FB-LLC) series resonant converter is proposed. FB-LLC series resonant, high voltage transformer and bipolar single-phase symmetrical voltage multiplier are used in the main circuit. The parameters of the main circuit are selected with FHA (first harmonic approximation) model. The correspondent control circuit is designed through simulation software. First get approximate open-loop transfer function of the main circuit with the aid of the simulation software, and then design adjustor parameters. The simulation results of the X-Ray power supply show that the output voltage can be adjusted continuously within 40kV~120kV with rise time less than 2ms and ripple factor less than 2%.

Keywords

X-ray tubes; electric generators; open loop systems; power convertors; power supplies to apparatus; power transformers; pulse frequency modulation; transfer functions; voltage multipliers; zero voltage switching; FB-LLC series resonant converter; FHA model; X-ray tube; ZVS; bipolar single-phase symmetrical voltage multiplier; first harmonic approximation model; full bridge LLC series resonant converter; high voltage transformer; open-loop transfer function; pulse frequency modulation; resonant X-ray high voltage DC power supply; voltage 40 kV to 120 kV; Converters; Integrated circuit modeling; Power supplies; RLC circuits; Resonant frequency; Transfer functions; Voltage control; HVDC; LLC series resonant; X-ray power supply; ZVS; voltage multiplier;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on

Conference_Location

XianNing

Print_ISBN

978-1-61284-458-9

Type

conf

DOI

10.1109/CECNET.2011.5769095

Filename

5769095