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Analysis and Design of the Ladder Resonant Switched-Capacitor Converters for Regulated Output Voltage Applications

机译:用于稳压输出电压应用的梯形谐振开关电容转换器的分析和设计

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The traditional Ladder switched-capacitor converters have the issues of hard-switching operation and poor line regulation capability. By adding a resonant inductor and substituting a bulky capacitor bank with a small resonant capacitor, its resonant configuration can be obtained and the aforementioned issues could be solved. In addition, by operating the Ladder resonant switched-capacitor converters (RSCs) above the resonance, the optimized operation region is found and some transformational changes can be obtained: the transistors can be operated with zero voltage switching turn-on and diodes are zero current switching turned on/off; the line regulation range is increased significantly for regulated output voltage applications; the instability issue of transition between discontinuous current mode and continuous current mode can be avoided with closed loop; and the voltage/current stress of the resonant tank is reduced. Extensive analysis above and below the resonance is presented to reveal the converter operation modes, voltage-gain curves, output characteristics, and voltage/current stress of the resonant tank. A 3X Ladder RSC prototype for an electronic fuel injection application with maximum output voltage 150 V, maximum power 140 W and peak efficiency 97.6% was designed to be operating in the optimized operation region. The analysis is verified by experimental results.
机译:传统的梯形开关电容器转换器具有硬开关操作和较差的线路调节能力的问题。通过添加谐振电感器并用小的谐振电容器代替笨重的电容器组,可以获得其谐振配置,并且可以解决上述问题。此外,通过在谐振上方操作梯形谐振开关电容器转换器(RSC),可以找到最佳的工作区域并获得一些转换变化:晶体管可以零电压开关导通来工作,二极管的电流为零。开关打开/关闭;对于调节的输出电压应用,线路调节范围显着增加;闭环可以避免不连续电流模式和连续电流模式之间转换的不稳定性。谐振槽的电压/电流应力减小。给出了谐振上方和下方的详尽分析,以揭示转换器工作模式,电压增益曲线,输出特性以及谐振回路的电压/电流应力。设计用于电子燃油喷射应用的3X Ladder RSC原型,其最大输出电压为150 V,最大功率为140 W,峰值效率为97.6%,旨在在优化的运行区域内运行。实验结果验证了该分析。

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