基于LC串联谐振的高压恒流充电电源设计

江进波; 徐林; 罗正; 杨文; 唐铭; 姚延东; 陈锐

doi:10.11884/HPLPB202436.230295

基于LC串联谐振的高压恒流充电电源设计

doi: 10.11884/HPLPB202436.230295

江进波^{1, 2,},
徐林¹,
罗正³,
杨文³,
唐铭³,
姚延东¹,
陈锐¹

1.
三峡大学电气与新能源学院，湖北宜昌 443002
2.
三峡大学湖北省输电线路工程技术研究中心，湖北宜昌 443002
3.
国网恩施供电公司，湖北恩施 445000

基金项目: 国家自然科学基金项目(51707105)；强脉冲辐射环境模拟与效应全国实验室专项(SKLIPR2008)

详细信息

作者简介:
江进波，jinbojiang@163.com

中图分类号: TN78
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- 被引次数: 0
出版历程
- 收稿日期: 2023-09-04
- 修回日期: 2024-01-12
- 录用日期: 2024-01-13
- 网络出版日期: 2024-03-02

Design of high voltage constant current charging power supply based on LC series resonance

1.
College of Engineering and New Energy, China Three Gorges University, Yichang 443002, China
2.
Hubei Provincial Engineering Research Center for Power Transmission Line, China Three Gorges University, Yichang 443002, China
3.
State Grid Enshi Power Supply Company, Enshi 445000, China

摘要

摘要: LC串联谐振式高压恒流充电电源能够实现电容器的高效快速充电，且具有较好的抗负载短路能力，在高重频脉冲功率系统中具有广阔的应用前景。充电电源的效率是决定系统重频运行能力的重要因素，提高效率是目前高压电容器充电电源设计的首要目标。根据LC串联谐振电路的工作原理，分析可知电源工作模式、逆变桥的开关频率以及高频变压器的分布参数是影响LC串联谐振电源效率的主要因素。针对功率为10 kW、输出电压为40 kV的直流电源，计算主电路参数并利用Pspice建立了电路模型验证其准确性，采用软开关技术减小开关损耗，设计了分布参数较小的高频变压器进一步提高效率，并在此基础上完成了电源整体结构设计。最后测试了电源的充电特性，结果表明该电源可将0.1 µF电容器在37 ms内充电至39.5 kV，其充电效率为87.1%。
- 高压直流电源 /
- LC串联谐振 /
- 恒流充电 /
- 充电效率 /
- 高压电容器充电
Abstract: LC series resonant high voltage constant current charging power supply can realize high efficiency and fast charging of the capacitor and has an excellent capacity of anti-load short-circuit, hence it has extensive application prospects in high repetition frequency pulsed power systems. The efficiency of the charging power supply is a crucial factor to determine the ability of the system to operate at repetition rate. Improving efficiency is the primary goal of designing high-voltage capacitor charging power supply. According to the working principle of LC series resonant circuit, it is analyzed that the operating mode of power supply, the switching frequency of the inverter bridge and the distribution parameters of the high-frequency transformer are the main ingredients affecting the efficiency. For a DC power supply with a power of 10 kW and an output voltage of 40 kV, the main circuit parameters were calculated and the circuit model was established using Pspice to verify its accuracy. The soft switching technology was used to reduce the switching loss, and the high frequency transformer with smaller distribution parameters was designed to further improve the efficiency. On this basis, the overall structure design of the power supply was completed. Finally, the charging characteristics of the power supply were tested. Experimental tests indicate that the power supply can charge a 0.1 µF capacitor to 39.5 kV within 37 ms, and the charging efficiency of the power supply is 87.1%.
- high voltage DC power supply /
- LC series resonance /
- constant current charging /
- charging efficiency /
- high voltage capacitor charging

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图 1 LC串联谐振变换器拓扑结构

Figure 1. Schematic diagram of LC series resonant converter

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图 2 DCM工作模式波形图

Figure 2. Main waveform of DCM, 0＜f_s≤f_r/2

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图 3 电源系统组成图

Figure 3. Power system composition diagram

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图 4 高频变压器等效模型

Figure 4. Equivalent model of high-frequency transformer

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图 5 LCC串并联谐振变换器拓扑结构

Figure 5. Topology diagram of LCC series parallel resonant converter

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图 6 高频高压变压器绕制过程

Figure 6. Winding process of high-frequency high-voltage transformer

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图 7 谐振电流仿真波形

Figure 7. Resonant current simulation waveforms

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图 8 充电电压波形

Figure 8. Charging voltage waveform

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图 9 谐振电流测试波形

Figure 9. Resonant current test waveforms

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图 10 0.1 µF电容充电电压波形

Figure 10. Charging voltage waveform of 0.1 µF capacitor

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表 1 目标参数

Table 1. Target parameters

charging voltage U/kV	charging power P₀/kW	charging current I/A	resonant frequency f_r/kHz	switching frequency f_s/kHz	efficiency η/%
40	10	0.25	40	10～20	80

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表 2 设计输出参数

Table 2. Design output parameters

parameter	charging voltage/kV	resonance frequency/kHz	switching frequency/kHz	linear and nonlinear charging turning point time/ms	peak resonant current/A
output value	40	40	16	18	56
design value	40	40	10～20	19.9	59.73

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