Heuristic Algorithm-Based Design Method for Class-E Switching Circuits
<Abstract> In this work, a novel numerical design strategy is presented for designing the class-E switching converters based on the heuristic algorithm. Compared with previous works, the heuristic algorithm requires no initial-value estimations and partial-difference derivations. Therefore, only circuit equations and evaluation functions are necessary for the proposed design method, which is independent of the design parameter number. In this research, a design of a 25 W, 13.56 MHz load-independent wireless power transfer (WPT) system is shown as an example. By defining the evaluation functions considering output-voltage tolerances against the load variations and the power-delivery efficiency, the designed WPT system has a function of load-independent characteristics. Namely, output load regulations and zero-voltage switching (ZVS) achievements can be achieved at any load resistance. It was confirmed that the prototype implemented system achieved the complete load-independent functions, which proved the effectiveness of the proposed design method. |