The low energy storage quadratic boost converter (LES-QBC) was recently proposed as an advantageous topology in terms of reduced output voltage ripple and fast dynamic response, besides high power density and reduced energy storage. The topological configuration can be exploited mainly through a 180° phase shift between the controlled switch gate signals. Nevertheless, this feature imposes a relevant challenge in terms of modeling, since traditional averaging an ripple estimation techniques cannot provide an accurate approximation to the actual switching dynamics of the converter. Motivated by this issue, in this article, we provide a complete quantitative analysis of both the steady-state and dynamic behavior of the LES-QBC, giving a fine understanding of their operation in continuous conduction mode when a pulse width modulator is used. The voltage gain, ripple factor, and dynamic behavior are modeled considering parasitic resistances and a wide operation range for the input voltage and the load. The demonstrated performance corroborates the high value of the converter for several applications in the industry. Every theoretical prediction is fully validated via simulations and experimental results.

中文翻译：

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低能量存储二次升压转换器的精确建模


低能量存储二次升压转换器（LES-QBC）最近被提出作为一种有利的拓扑结构，除了高功率密度和减少能量存储之外，还可以减少输出电压纹波和快速动态响应。主要通过受控开关栅极信号之间的 180° 相移来利用拓扑配置。然而，此功能在建模方面提出了相关挑战，因为传统的平均纹波估计技术无法提供转换器实际开关动态的准确近似值。受此问题的启发，在本文中，我们对 LES-QBC 的稳态和动态行为进行了完整的定量分析，以便更好地了解使用脉宽调制器时它们在连续导通模式下的操作。电压增益、纹波系数和动态行为的建模考虑了寄生电阻以及输入电压和负载的宽工作范围。所展示的性能证实了转换器对于行业中多种应用的高价值。每个理论预测都通过模拟和实验结果得到充分验证。