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Alternative Approach to Analysis and Design of Series Resonant Converter at Steady State
IEEE Transactions on Industrial Electronics ( IF 7.7 ) Pub Date : 2019-06-01 , DOI: 10.1109/tie.2018.2860536
Mohammad Daryaei , Mohammad Ebrahimi , Sayed Ali Khajehoddin

In this paper, new steady-state analysis is proposed for a series resonant converter (SRC) that provides closed-form expressions for converter waveforms. Using the proposed analysis, explicit equations are obtained to design the converter components. It is shown that an SRC can be modeled through a nonlinear differential equation with discontinuous inputs. A Laplace-based theorem (LBT) is provided to obtain the steady-state analytic solution of the resonant converter differential equations. Using the LBT, a flowchart is proposed to analyze the converter where the nonlinearity of differential equation is removed by defining intermediate variables. The variable duty ratio SRC is analyzed using the proposed flowchart. Accurate, closed-form, and explicit equations for converter waveforms, voltage gain, current phase lag, zero voltage switching, and discontinuous conduction mode boundaries are derived. The proposed analysis is compared with conventional methods and its accuracy is validated through simulations and experimental results. Moreover, using the proposed method, a novel procedure is provided for the optimal design of the converter and is compared with conventional design approaches.

中文翻译:

稳态串联谐振转换器分析和设计的替代方法

在本文中,针对串联谐振转换器 (SRC) 提出了新的稳态分析,该转换器为转换器波形提供了闭式表达式。使用建议的分析,获得显式方程来设计转换器组件。结果表明,SRC 可以通过具有不连续输入的非线性微分方程建模。提供了基于拉普拉斯的定理 (LBT) 以获得谐振转换器微分方程的稳态解析解。使用LBT,提出了一个流程图来分析转换器,其中通过定义中间变量来去除微分方程的非线性。使用建议的流程图分析可变占空比 SRC。转换器波形、电压增益、电流相位滞后、零电压开关、和不连续的传导模式边界被推导出来。将所提出的分析与传统方法进行比较,并通过模拟和实验结果验证其准确性。此外,使用所提出的方法,为转换器的优化设计提供了一种新颖的程序,并与传统的设计方法进行了比较。
更新日期:2019-06-01
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