交错并联Buck中耦合电感的设计  

Design of coupled inductor in interleaved Buck

作　　者：李祥忠 朱彬[2] 王善良 卢俊龙[3] 

机构地区：[1]深圳市中兴昆腾有限公司 [2]中国人民解放军96623部队 [3]哈尔滨工业大学深圳研究生院

出　　处：《电子设计工程》2014年第15期116-118,121,共4页Electronic Design Engineering

基　　金：深圳市科技创新计划项目(CXZZ20120615163423014)

摘　　要：针对开关电源系统对功率密度等级不断提高的要求,为进一步发挥交错并联技术的优势,本文以减小输出电流纹波和改善动态特性为目标,对大占空比条件下交错并联Buck电路中的耦合电感进行了详细分析和计算。通过软件仿真验证,得出了耦合系数和占空比对电路性能的具体影响,耦合系数的取值应尽量接近-1,从而为耦合电感的设计提供了理论依据。In order to solve the problem of power density in switching power supply and further develop the advantages of interleaving techniques, this paper carries out a detailed analysis and calculation on the coupled inductor of Interleaved Buck circuit with the target of reducing the output current ripple and improving the dynamic characteristics. By studying the principle of circuit and simulating in software, a conclusion on how to determine the coupling coefficient and the duty cycle of the specific impact on circuit performance is gotten, it is important that the value of the coupling coefficient is close to-1.

关 键 词：交错并联 耦合电感 开关电源 电流纹波 

分 类 号：TN712[电子电信—电路与系统]