جستجوی مقالات مرتبط با کلیدواژه "شارژر بدون سیم دینامیک" در نشریات گروه "فنی و مهندسی"

In this paper, resonance frequency changes in semi-dynamic wireless charging circuits and a method for improving soft switching range (ZVS) is presented. Due to the changes in the distance between the powers transmission pads, the amount of mutual inductance of the transmitter and receiver coils and as a result changes the resonant frequency of the converter. The structure of hard switching converters generally has high losses, low efficiency and limited frequency. There is an overlap between the voltage and current parameters of the non-linear elements in these converters, it makes these converters more vulnerable at high power levels. The proposed method for increasing the soft switching range in the dynamic wireless charger is presented. In order to perform better, have been presented different models of the function of keys and non-linear elements in different structures in this field. In these structures, by adding a number of additional elements to the circuit, the overlapping of the current and voltage of the switches at the moments of turning on and off is almost eliminated and are eliminated switching losses. In this article, is used LCC compensation structure. In this structure, by matching the primary inductor and capacitor in the compensator structure, the resonance frequency is smaller than the switching frequency and soft switching conditions are established in the converter. The proposed circuit is simulated in MATLAB software and are investigated the resonance frequency changes in different coupling coefficients and are presented the results.