V^2控制Buck转换器的预测无差拍控制器设计

Predictive dead-beat controller design for V^2 controlled Buck converter

为了提高DC-DC开关电源的瞬态响应速度,针对Buck转换器提出了一种V2预测无差拍控制算法.基于V2预测无差拍控制的Buck转换器系统结构,根据输出电压纹波的特点提出了适用于V2控制Buck转换器的预测无差拍控制.进一步提出了改进的V2预测无差拍控制器,使该算法更易于数字实现.Simulink仿真验证结果表明:与传统电压模式控制相比,V2控制算法在输入电压变化2V条件下,调整时间缩短60%;在负载变化2Ω条件下,调整时间缩短58.3%.

In order to improve transient response speed of direct current-direct current（DC-DC）switching power supplies,a V^2 predictive dead-beat control algorithm was proposed.Based on the system structure of V^2 predictive dead-beat controlled buck converter and according to the characteristics of the output voltage ripple,apredictive dead-beat control applied to V^2 controlled buck converter was introduced.An improved predictive dead-beat controller was further investigated,which was easier to implement by digital devices.The Simulink simulation results show that compared with conventional voltage control mode,the response time is reduced by 60% when input voltage changes 2Vand by58.3% when load changes 2Ω.