改进平均电流自动均流法及其在Boost变换器并联系统中的应用

改进了基于平均电流模式的自动均流法，并应用于并联Boost变换器均流控制中，理论分析表明在低于右半平面零点的低频域内将Boost变换器外部环路的二阶系统降为一阶系统，使得控制回路易于设计,并保证了并联Boost变换器的动态响应。该文给出基于平均电流模式的自动均流控制系统分析方法，提出其控制回路的设计原则，并指出该控制方法同样适合于多并联模块，原则上并联模块数量不限。论文还建立了２台40V/120V/4.2A的Boost变换器并联实验系统，实验证明理论分析的正确性。

Improved Automatic Current-sharing Control Based on Average Current Mode for Parallel Boost Converters

This paper presents an improved automatic current-sharing control method based on average current mode for parallel Boost converters. With the proposed method, the second-order system of the external loop of Boost converter is reduced to a first-order under the right-half-plane zero, that makes the design of the control circuit easy and improves the dynamic response of parallel Boost converters. This paper presents detail analysis and design guidelines of the proposed control system. The multi-module parallel number is limitless in theory. Two 40V/120V/4.2A Boost converters have been designed for parallel experiment, verifying the correctness of the theory analysis.