Boost变换器非线性电流控制方法

基于输入输出线性化，提出一种新型Boost变换器非线性电流控制及其改进方法。通过研究该系统的内动态稳定性，指出对于电流控制(current control method，CCM) Boost变换器，当采用电压模式控制时，其内动态不稳定；当采用电流模式控制时，其内动态稳定，可通过直接控制电感电流间接控制输出电压。因此，采用输入输出线性化非线性控制方法，推导出新的电流控制律。实验结果表明，该方法能够保证电感电流有效精确的跟踪给定值，但输出电压存在稳态误差，需对所给控制方案进行修正。进而考虑实际电路附属参数的影响，推导出了修正后的控制律，实验验证了修正方案的正确性，改进后控制系统动稳态性能良好。

Nonlinear Current Control Method for Boost Converter

Based on input-output linearization theory, a novel nonlinear current control method for Boost converter and its modification was proposed. Through stability analyzing the internal dynamics of the system, it was pointed out that the internal dynamics of the system is unstable under voltage control mode and it is stable under current control mode. It is feasible to control the output voltage indirect through the regulation of the inductor current. Then, a novel current control law was derived. Experimental results show that under the proposed current control law the inductor current can follow the setting value precisely, while there exists steady-state error of the output voltage. Further, under consideration of the adjunct parameters of the practical circuit, a modified control scheme was proposed. The validity of the modified current control law was verified by experimental results. The controlled system has excellent steady-state and dynamic characteristics.