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Design and Analysis of LLC Resonant Converter for X-Ray High-Voltage Power

机译：X射线高压电源LLC谐振变换器的设计与分析

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摘要

Aiming at the problems of low frequency and large volume of LCC resonant topology of X-ray high voltage power supply, the main circuit design of X-ray high voltage power supply is realized by the combination of full bridge LLC resonant converter and bidirectional symmetric voltage doubling rectification. Based on the analysis of the working principle of LLC resonant converter and the output characteristics of the voltage doubling rectifying circuit, the fundamental wave equivalent model of the converter is improved. And the parameters of the main circuit are designed with the aim of improving the power supply efficiency, so as to realize the high frequency miniaturization and low ripple of the X-ray high voltage power supply. The simulation results show that the output voltage of X-ray high voltage power supply is continuously adjustable from 60 kV to 180 kV, the highest working frequency can reach 728 kHz, and the ripple rate of output voltage is less than 0.03%. The correctness and feasibility of the proposed topology are proved.
机译：针对X射线高压电源LCC谐振拓扑结构低频，体积大的问题，结合全桥LLC谐振变换器和双向对称电压，实现了X射线高压电源的主电路设计。整顿加倍。通过分析LLC谐振变换器的工作原理和倍压整流电路的输出特性，改进了变换器的基波等效模型。为了提高电源效率，设计主电路参数，以实现X射线高压电源的高频小型化和低纹波。仿真结果表明，X射线高压电源的输出电压可在60 kV至180 kV范围内连续可调，最高工作频率可达到728 kHz，输出电压的纹波率小于0.03％。证明了所提拓扑结构的正确性和可行性。

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