This article proposes a self-balanced cascaded H-bridge multilevel inverter with a binary asymmetric ratio. The inverter uses only one dc source per phase that will feed the H-bridge with the highest dc-link voltage (called main bridge). The dc links of all other H-bridges (called auxiliary bridges) are formed by floating capacitors. Floating capacitors converge to the corresponding steady-state voltages by the principle of a level-doubling network without using any closed-loop control technique. In a steady state, the dc-link voltage of each auxiliary bridge will be equal to half of the dc-link voltage of its preceding H-bridge. This will result in an inherent binary asymmetric ratio among all the dc-link voltages. Operation of the proposed topology is validated by MATLAB simulations and experimentation on the hardware prototype. Experimental results match well with simulation results.

中文翻译：

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每相具有单个直流电源的非对称级联 H 桥多电平逆变器

本文提出了一种具有二进制不对称比的自平衡级联 H 桥多电平逆变器。逆变器每相仅使用一个直流电源，以最高直流链路电压（称为主桥）为 H 桥供电。所有其他 H 桥（称为辅助桥）的直流链路由浮动电容器形成。浮动电容通过倍频网络的原理收敛到相应的稳态电压，无需使用任何闭环控制技术。在稳定状态下，每个辅助桥的直流母线电压将等于其前一个 H 桥直流母线电压的一半。这将导致所有直流链路电压之间存在固有的二进制不对称比率。通过 MATLAB 模拟和硬件原型实验验证了所提出拓扑的运行。