| 航天器DC/DC变换器启动特性建模分析研究 |
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| 引用本文： | 孟宪会,何宇,熊晓英. 航天器DC/DC变换器启动特性建模分析研究[J]. 航天器工程, 2010, 19(1): 17-23 |
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| 作者姓名： | 孟宪会 何宇 熊晓英 |
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| 作者单位： | 北京空间飞行器总体设计部,北京,100094;北京空间飞行器总体设计部,北京,100094;北京空间飞行器总体设计部,北京,100094 |
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| 摘 要： | 介绍和分析了单管正激型DC/DC变换器的工作原理,指出变换器内置输入滤波器决定了其启动瞬间阻抗特性;提出变换器内置滤波器构成了二阶欠阻尼系统,当有阶跃电压输入时,滤波电容充电电流会产生衰减振荡,即为浪涌电流产生的根本原因。在此基础上,文章运用＂拉普拉斯变换＂对浪涌电流的计算公式进行了推导,并推导出浪涌电流的时域公式。提出了单管正激型DC/DC变换器启动特性仿真模型的建立方法,并通过试验验证了仿真模型建立的有效性。
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| 关 键 词： | 航天器 DC/DC 变换器 浪涌电流 产生机理 仿真模型 抑制 |
Research on DC/DC Converters'Start Characteristics on-satellite Devices |
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| MENG Xianhui HE Yu XIONG Xiaoying. Research on DC/DC Converters'Start Characteristics on-satellite Devices[J]. Spacecraft Engineering, 2010, 19(1): 17-23 |
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| Authors: | MENG Xianhui HE Yu XIONG Xiaoying |
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| Affiliation: | Beijing Institute of Spacecraft System Engineering;Beijing 100094;China |
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| Abstract: | The paper introduces and analyses the operational principle of single-ended forward DC/DC converters,and points out that the input filter built in converters dominates their input load impedance characteristics at turn-on.The paper proposes that the input filter composes a 2 pole underdamped system,in which the capacitor's charging current will be exponentially damped sinusoid.The capacitor's charging current is an inrush current.Based on this,the paper gives the derivation fomula in time domain.The paper a... |
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| Keywords: | spacecraft DC/DC converter inrush current generation mechanism simulation model limiting |
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