基于LLC谐振变换器的X光机高压电源设计与仿真

Design and Simulation of High Voltage Power Supply for X-Ray Machine Based on LLC resonant Converter[JZ)][HS)]

摘要:

针对X光机高压电源系统稳定性差、效率低等缺点,设计了一种基于LLC串并联谐振变换器的高压电源;介绍了LLC谐振变换器的基本原理,并对其拓扑结构进行基波近似分析,得出电路的增益特性；采用正负双向对称倍压整流电路,有效抑制了输出纹波；最后,采用Saber仿真软件进行了电路建模和仿真分析,得出的仿真结果验证了控制电路的有效性和可行性。

Abstract:

Aiming at the problems of poor stability and low frequency in the high voltage power supply for X-Ray machine, a kind of high voltage power supply based on LLC series-parallel resonant converter is designed. The basic principle of LLC resonant converter is introduced in this paper, and its topology structure is analyzed using fundamental harmonic approximation. Then the gain characteristics of the circuit are obtained. The design uses positive and negative double-phase symmetrical voltage multiplier, effectively reducing the high voltage output ripple. Finally, the Saber simulation software is used for circuit modeling and simulation analysis. It is concluded that the simulation results verify the feasibility and effectiveness of the control circuit.