摘要
以工作在断续导电模式(DCM)的脉冲跨周期调制(PSM)Buck变换器为例,基于一个控制脉冲序列循环周期内输出电压变化量为零的理论,推导出功率脉冲与跨周期脉冲数量比的关系式,进而得到功率开关管驱动信号的有效工作频率计算公式。通过详细分析输出电压纹波的产生机理,推导出不同控制脉冲序列循环周期下的输出电压纹波计算公式。电路仿真和实验结果很好地验证了理论分析的正确性。
Pulse skipping modulation （PSM） Buck converter operating in discontinuous mode （DCM） is taken as an example.Based on zero variation of output voltage in a control pulse train repeated cycle, the number ratio of power pulses and skipping pulses is derived, and then the effective operating frequency of the drive signal for the power switch is formulated.Through detailed analysis to forming mechanism of output voltage ripple, the formulas of output voltage ripple under different control pulse train repeated cycles are deduced.Circuit simulations and experimental results verify the correctness of theoretical analysis.
出处
《电力电子技术》
CSCD
北大核心
2013年第6期86-88,共3页
Power Electronics
基金
国家自然科学基金(51177140
51277017)
江苏省常州市自然科学基金(CJ20120004)~~
关键词
变换器
脉冲跨周期调制
输出电压纹波
converter
pulse skipping modulation
output voltage ripple
