单电感双输出Boost变换器的复合控制方案

Compound Control Scheme for Single-inductor Dual-output Boost Converter

为减小单电感双输出Boost变换器的交叉调节,提出一种复合控制方案。建立变换器仿射非线性数学模型,基于微分几何理论证明所建模型满足精确反馈线性化条件,构造出相应输出函数实现系统的线性化和解耦,进而分别为线性系统设计内模控制器和状态反馈控制器,并对满足控制系统稳定要求的反馈系数选取进行分析。与现有控制方法进行仿真比较,结果表明,所提控制方案具有更好的动态调节特性、更优的控制性能和更小的交叉调节。实验结果进一步验证了所提控制方案的可行性。

To reduce the cross-regulation of a single-inductor dual-output Boost converter,a compound control scheme is proposed in this paper.An affine nonlinear mathematical model of the converter is established,and it is proved that this model satisfies the exact feedback linearization condition based on the differential geometry theory.The corresponding output function is constructed to realize the linearization and decoupling of the original system,and an internal model controller and a state feedback controller are designed for the linear system,respectively.In addition,the selection of feedback coefficients that meet the stability requirements of the control system is analyzed.Simulation results show that compared with the existing control method,the proposed control scheme has better dynamic regulation characteristics,better control performance and smaller cross-regulation.Moreover,experimental results verified its feasibility.