电压模式Buck变换器的分岔控制

Bifurcation Control of the Voltage-mode Buck Cnverter

设计一个二阶非线性ADRC控制器来控制输入电压阶跃变化时电压模式Buck变换器中的周期2分岔。将输入电压的阶跃变化看作扰动,建立闭环控制系统的数学模型。基于该模型,通过数值仿真验证ADRC控制器是否能够控制电压模式Buck变换器中的分岔行为。结果表明,ADRC控制器能够将电压模式Buck变换器中的周期2分岔调节到设定点,能够估计并补偿输入电压的阶跃变化。闭环控制系统对输入电压的阶跃变化具有良好的鲁棒性。

A second-order nonlinear ADRC controller is designed to control the period-2 bifurcation in the voltage-mode Buck converter when the input voltage has a step change.Considering the step change of the input voltage as a disturbance,a model of the closed-loop control system is established.Based on this model,whether the ADRC controller can control the bifurcation behavior in the voltagemode Buck converter is verified by numerical simulations.Results show that the ADRC controller can control the period-2 bifurcation in the voltage-mode Buck converter to the set point.Moreover,the ADRC controller can estimate and compensate the step change of the input voltage.The closed-loop control system has good robustness to the step change of the input voltage.