This paper presents analysis, design and experimentation of a high voltage DC power supply (HVDCPS) with power factor correction based on LLC resonant converter. For power factor correction improvement, the proposed topology has an input rectifier with two filter capacitors, two inductors with a bus capacitor (Cbus) and a resonant tank. To prevent the reverse current flow towards the source diodes (D9 & D10) are employed. A couple of power switches are inserted in a single leg that makes a half-bridge network. To form an LLC resonance circuit, a capacitor and two inductors are connected to the primary winding of the high voltage transformer (HVT). To rectify the high frequency and high voltage, a full-bridge rectifier is inserted to secondary side of high voltage transformer (HVT). The secondary diodes always get on and off under zero current switching (ZCS) due to discontinuous conduction mode of proposed topology. It is found that due to power factor correction, less cost, lower losses and smaller size, the proposed topology achieves several major improvements over the conventional high voltage power supply. To obtain zero voltage switching (ZVS) the converter operate in a narrow frequency range. The output voltage can be varied or regulate through pulse width modulation of power switches. Due to ZVS and ZCS, the proposed topology has minimum switching losses and therefore higher efficiency. To verify the feasibility of the proposed topology a prototype is being implemented and verified by simulation & experimental results for 1.5KV prototype of the proposed topology. The results make sure the achievement, good efficiency and successful operation of the proposed topology.

本文介绍了一种基于LLC谐振转换器的功率因数校正高压直流电源（HVDCPS）的分析，设计和实验。为了改善功率因数校正，建议的拓扑结构具有一个输入整流器，该整流器具有两个滤波电容器，两个带总线电容器（Cbus）的电感器和一个谐振回路。为防止反向电流流向源极二极管（D9＆D10）。一对半桥网络中的单个支路中插入了几个电源开关。为了形成LLC谐振电路，将一个电容器和两个电感器连接到高压变压器（HVT）的初级绕组。为了对高频和高压进行整流，将全桥整流器插入高压变压器（HVT）的次级侧。由于所建议拓扑的不连续导通模式，次级二极管始终在零电流开关（ZCS）下导通和截止。可以发现，由于功率因数校正，成本更低，损耗更低，尺寸更小，因此所提出的拓扑结构相对于传统的高压电源实现了几项重大改进。为了获得零电压开关（ZVS），转换器必须在狭窄的频率范围内工作。输出电压可以通过功率开关的脉冲宽度调制来改变或调节。由于ZVS和ZCS，所提出的拓扑具有最小的开关损耗，因此效率更高。为了验证拟议拓扑的可行性，正在对拟议拓扑的1.5KV原型进行仿真并通过实验和实验结果验证了原型。结果确保了成就，