This article is concerned with the asymmetrical control strategies of a four-channel dc/dc buck converter in the continuous current conduction mode (CCM). The converter has two input and four output channels. Energy equations of the converter are studied, and asymmetry of input voltages, output voltages, and loads are examined in the CCM. The proposed control strategy allows us to directly control the power flow in each channel without any unwanted consequences for the rest of the channels among these conditions. The main advantage is the direct control of the total transferred power by the positive sequence of the capacitor voltage, the power exchange among the input channels by the negative sequence of the capacitor voltage, and the power exchange among the output channels by the inductor currents. Calculating these currents also helps to determine whether the converter at a certain point operates in the CCM or in the boundary mode (where zero current switching is possible). Feasibility of zero-voltage switching is simplified by this method. Converter efficiency is showed to be 83% at asymmetrical output voltages in the CCM. Theoretical studies are confirmed by both numerical simulations and laboratory experiments on a 100-W prototype. The studied converter can be applied in supplying multilevel inverters.

中文翻译：

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非对称连续电流传导模式下的四通道降压转换器

本文关注的是连续电流传导模式 (CCM) 下四通道 DC/DC 降压转换器的非对称控制策略。该转换器有两个输入和四个输出通道。研究了转换器的能量方程，并在 CCM 中检查了输入电压、输出电压和负载的不对称性。所提出的控制策略允许我们直接控制每个通道中的功率流，而不会对这些条件中的其余通道产生任何不良后果。主要优点是通过电容电压的正序直接控制总传输功率，通过电容电压的负序控制输入通道之间的功率交换，通过电感电流在输出通道之间进行功率交换。计算这些电流还有助于确定转换器在某个点是在 CCM 还是在边界模式下工作（零电流开关是可能的）。这种方法简化了零电压切换的可行性。在 CCM 中的非对称输出电压下，转换器效率显示为 83%。理论研究得到了对 100 W 原型的数值模拟和实验室实验的证实。所研究的转换器可用于为多电平逆变器供电。理论研究得到了对 100 W 原型的数值模拟和实验室实验的证实。所研究的转换器可用于为多电平逆变器供电。理论研究得到了对 100-W 原型的数值模拟和实验室实验的证实。所研究的转换器可用于为多电平逆变器供电。