应用于宽输入范围的变模态LLC电路设计

Variable Modal LLC Circuit Used in Design of Wide Input Voltage Range

在风力、光伏发电等新能源发电系统中,电压输出范围变化很大,为此提出一种变模态的LLC电路,其拓扑或者控制方式随着输入电压的变化而变化。电路由数字信号处理器DSP进行数字控制,控制简单方便,不需要增加额外的模拟电路。通过分析、仿真和实验验证,与传统LLC相比,变模态LLC在宽输入场合,其频率变换范围小,全范围内效率较高。

In the new energy power generation system such as wind power, photovoltaic power generation system,the voltage output range is very wide, therefore a kind of variable modal LLC circuit is put forward, which the topology or control mode changes with the change of the input voltage. The circuit uses digital signal processor（DSP）, which is simple and conve nient and no need to add additional analog circuit. Through analysis, simulation and experiment validation, compared with the traditional LLC, variable modal LLC used in wide input variable can narrow the scope of frequency conversion and improve efficiency in the scope of whole input range.