For pulse train (PT) controlled switching converter operating in continuous conduction mode (CCM), a problem of low frequency oscillation is existed, which enlarges the output voltage ripple. In order to solve this issue, a constant on/off time pulse train (COOT‐PT) control technique with a buck converter is proposed, and the working principle is introduced in detail. Based on the variation of the output voltage during one control pulse, the pulse train, output voltage ripple and dynamic behaviors of the COOT‐PT controlled buck converter are studied. The experimental results verify the theoretical analysis and indicate that the COOT‐PT controlled buck converter eliminates low frequency oscillation and enjoys smaller output voltage ripple compared with PT control technique. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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恒定开/关时间脉冲序列控制的降压转换器

对于以连续导通模式（CCM）工作的脉冲串（PT）控制的开关转换器，存在低频振荡问题，这会增大输出电压纹波。为了解决这个问题，提出了一种具有降压转换器的恒定开/关时间脉冲序列（COOT-PT）控制技术，并详细介绍了其工作原理。根据一个控制脉冲期间输出电压的变化，研究了COOT-PT控制的降压转换器的脉冲序列，输出电压纹波和动态特性。实验结果验证了理论分析，并表明与PT控制技术相比，COOT-PT控制的降压转换器消除了低频振荡，并具有较小的输出电压纹波。©2020日本电气工程师学会。