High power density capacitor charging power supply
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摘要: 针对高压脉冲电容器充电电源高功率小型化的发展需求，采用谐振软开关技术和热设计技术研制了开关频率为50 kHz的充电电源，要求在电源10 kV的额定输出电压下充电速率达到20 kJ/s（额定输出电压下峰值功率40 kW），功率密度达到2 MW/m3。分析了分布参数的存在对高频逆变器工作特性的影响，介绍了针对不同分布参数影响的应对措施。初步试验研究了间歇工况下高功率小型化电源热设计技术，基于电源间歇工作特点，结合不同电源组件发热特性，设计了不同的散热措施，给出了各器件的温升数据。完成了充电电源性能测试实验，实验结果表明:电源功率密度达到2.15 MW/m3。Abstract: To meet the miniaturization requirement, a high-voltage capacitor charging power supply(CCPS) has been developed, which is capable of charging the load capacitor at 20 kJ/s at 10 kV output voltage (40 kW peak power output at 10 kV rated output voltage). This power supply adopts series resonant, soft-switching technology and thermal design technology and its switching frequency is 50 kHz. The effect of distributed parameters on its operating characteristic was analyzed, and solutions were introduced according to different distributed parameters. The thermal design technology of high power density CCPS at interval working condition was experimentally studied. On the basis of the interval operating and thermal characteristics of sub-units in the CCPS, cooling measures were designed and experimental results of temperature rise were provided. The performance test of the CCPS has been carried out, and it demonstrates that, with above designs the power density of the CCPS reaches 2.15 MW/m3.
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