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首页> 外文会议>MELECON 2010;IEEE Mediterranean Electrotechnical Conference >Extended first harmonic approximation in case of LLCC converters with capacitive output filter
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Extended first harmonic approximation in case of LLCC converters with capacitive output filter

机译：具有电容性输出滤波器的LLCC转换器的扩展的一次谐波近似

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摘要

The analysis of resonant converters is in general more cumbersome than in case of PWM converters, as often a multitude of modes has to be regarded and resonant oscillations with durations impossible to calculate directly are encountered. Therefore, approximations are required in order to facilitate the design process. An extended approximation in the frequency domain for the steady-state solution of the multi-resonant LLCC converter with capacitive output filter is presented in this paper, with a new degree of simplification regarding the resulting closed-form solution. By means of this approximation, the design of the fourth-order resonant LLCC converter is significantly simplified, providing a tool for rapid simulation combined with a very high accuracy. The accuracy of the investigated approach was double-checked by means of exact calculations.
机译：通常，与PWM转换器相比，谐振转换器的分析更为麻烦，因为通常必须考虑多种模式，并且会遇到无法直接计算持续时间的谐振。因此，需要近似值以便于设计过程。本文针对具有电容输出滤波器的多谐振LLCC转换器的稳态解，在频域中给出了扩展近似，并对所得的闭式解进行了新的简化。通过这种近似，可以明显简化四阶谐振LLCC转换器的设计，从而为快速仿真提供了非常高精度的工具。通过精确计算对所研究方法的准确性进行了双重检查。

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