基于复形法的LLC谐振变换器最优设计方法及其实现

以效率为优化目标,以品质因数Q、励磁电感与谐振电感的比值h以及磁性元件的工作磁通B_(max)为优化变量,详细给出了实现最优设计的各个步骤,包括损耗建模、边界条件的推导以及最优解的求解流程.最后制作了一台100 kHz、300 W的样机.给出了最优设计与可行设计的理论与实验对比结果.实验结果证明了该最优设计方法的有效性和准确性.

Optimum design of LLC resonant converter based on complex method and its realization

In the process of optimization, the $Q$ factor of the
converter, the $h$ ratio of magnetizing inductance to resonant
inductance and the maximum flux $B_{rm max}$ were chosen as the
optimal parameters, the details on the power loss of the converter
was presented, the boundary conditions was deduced and the process
of getting optimum solution was proposed. Finally, a
three-hundred-watt prototype was build; the theoretical and
experimental comparison result verified the feasibility and accuracy
of the design method.