高性能计算机总线变换器输出阻抗优化设计

摘要

针对中间母线架构分布式供电的高性能计算机电源稳定性问题,详细分析了三种不同控制方法总线变换器的输出阻抗特性,给出了负载点变换器输入阻抗低频值和总线变换器输出阻抗峰值的计算公式.建立了由一个总线变换器和两个负载点变换器组成的实验电路,对总线变换器输出阻抗进行了优化设计,并实际测量了输入和输出阻抗,验证了理论分析的正确性.实验和应用结果表明,输出阻抗优化设计可以有效解决高性能计算机电源稳定性问题.%To solve system stability of high-performance computer powered by intermediate-bus distributed power system, the output impedance characteristics of three control schemes of bus converters were analyzed in detail, and the input impedance low-frequency value of point of load converter and the output impedance peak of bus converter were presented. Based on impedance criterion, the output impedance of bus converter was optimized. Then, the input impedance and output impedance were measured by frequency response analyzer, which verified the theoretical analysis. The experimental and application results show that the output impedance optimization can effectively solve power system stability of high-performance computer.