摘要
针对功率变换器现有调制方法的不足,提出了一种用于非反相Buck-Boost功率变换器的调制方法,结合脉冲宽度调制和脉冲频率调制,使该功率变换器平滑地在Buck、Buck-Boost、Boost三种模式之间切换,从而在输入电压低于、高于或近似等于输出电压给定值的情况下,使输出电压稳定在给定电压。试验结果验证了该算法的可行性和有效性。
Aiming at the drawbacks of modulation method for power converter,a modulation method which combines pulse width modulation（PWM） with pulse frequency modulation（PFM） for the non-inverting buck-boost converter is proposed in the paper.The power converter can switch smoothly among buck working mode,buck-boost working mode and boost working mode in order to regulate the output voltage to the desired output voltage regardless of that the input voltage is less than,greater than or equal to the desired output voltage.The experimental results verify the feasibility and efficiency of the proposed algorithm.
出处
《水电能源科学》
北大核心
2011年第4期171-173,195,共4页
Water Resources and Power
基金
上海市优秀青年教师科研专项基金资助项目(shu09019)
