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开关输出电容在飞跨电容多电平变换器被动平衡中的作用

On the Role of Switch Output Capacitance on Passive Balancing Within the Flying Capacitor Multilevel Converter

语言:

中文摘要

飞跨电容多电平(FCML)变换器通常依赖自然平衡机制实现电容电压均衡。然而,在特定电平数和占空比组合下,电压无法自然平衡。本文研究了开关输出电容对被动平衡的影响,揭示了其在提升变换器运行稳定性与可靠性方面的关键作用。

English Abstract

Flying capacitor multilevel (FCML) converters typically rely on natural balancing to achieve a balanced distribution of flying capacitor voltages. The mechanisms by which the flying capacitor voltages are able to balance have been extensively studied and theoretically there are certain combinations of level count and duty cycle at which the flying capacitor voltages do not balance. Although the fl...
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SunView 深度解读

FCML拓扑在高功率密度光伏逆变器和储能变流器(PCS)中具有显著优势,能有效降低滤波器体积并提升效率。阳光电源在组串式逆变器及PowerTitan系列储能系统中,对功率密度和效率有极致追求。本文关于开关输出电容对被动平衡影响的研究,对于优化高频化、多电平变换器的控制策略及硬件设计具有重要指导意义,有助于在宽禁带半导体(如SiC/GaN)应用中进一步提升系统可靠性,减少对复杂主动平衡电路的依赖,从而降低系统成本。