【摘要】 本文研究了具有上下限电流控制的闭环DC/DC Boost变换器工作在周期及混沌状态下的频谱特征,证明了工作于混沌状态下的变换器可以有效的降低电磁干扰(EMI)水平。理论分析及仿真结果均证明,本文给出的电压、电流闭环反馈型变换器,既具有较低的电磁干扰水平,又能够保持输出电压稳定。使应用混沌控制降低开关电源电磁干扰水平的研究,更向实用化趋近。更多还原

【Abstract】 we have studied the frequency characteristic of closed-loop DC/DC Boost converter with maximum-minimum current limited control on different state in chaos and period .It demonstrates that chaos controlling is a method to depress EMI effective. The theory analysis and simulation result all indicate that the converter with both voltage and current feedback in this thesis not only has a low-er EMI lever, but can keep the output voltage steady. So the analysis result put the research to reduce electromagnetic interference level of switched-mode power supply by controlling chaos on the way to uitility.更多还原