基于动态补偿的CCM Boost变换器的最优控制

Optimal control of CCM Boost converter based on dynamic compensation

针对Boost DC/DC变换器在抑制干扰方面存在的不足,建立了CCM(电流连续型)Boost变换器的以控制目标为平衡点的状态反馈精确线性化模型,得到反馈控制律。对于变换后的线性模型,引入了基于动态补偿扰动抑制的最优控制器的设计算法。实验结果表明,所述控制策略不仅能对变换器进行有效控制,使系统具有理想的稳态特性,在系统启动与负载干扰抑制方面也优于传统的PI控制策略。

The deficiencies in suppressing disturbance of Boost converters operating in CCM （current conduction mode） was considered, then the nonlinear affine model of CCM （current conduction mode） converter based on the equilibrium point was formed. The feedback coefficient was achieved. The state variable feedback exact linearization model grounded on the concept of diffeomorphism and the phase of design of a linear quadratic cost function based on dynamic compensation were introduced. Simulation and experimental results show that the converter can be controlled efficiently, and a stable-state performance can be achieved. And it could be more reliable than conventional PI control.