LLC谐振变换器的轨迹控制

Study of trajectory control of LLC resonant converter

针对LLC谐振变换器谐振槽有多个谐振元件,工作过程复杂,难以对其实现有效控制的问题,提出一种最优轨迹控制方法.根据变换器的具体谐振过程,给出其多谐振过程的时域方程,并以此推导出其轨迹方程,绘制其状态轨迹图,并给出详细的控制法则.软件仿真和实验结果表明系统动态性能良好,验证了该控制方法的可行性和有效性.

Aimed at the problems in LLC resonant converter such as multiple resonance elements in its resonant tank, complicated working process, and difficult implementation of effective control, an optimal trajectory control method was proposed. According to the specific resonance mode of the converter, a time-domain equation of its multi-resonant process was given, so that its trajectory equations were de- rived, state trajectory diagram plotted, and then a detailed trajectory control rule was given. It was shown by the software simulation and experimental results that the system dynamic performance was excellent and the feasibility and validity of this trajectory control method were verified.