Pulse Density Modulation for Maximum Efficiency Point Tracking of Wireless Power Transfer Systems

Abstract

Pulse density modulation for maximum efficiency point tracking of wireless power transfer systems

Maximum efficiency point tracking control method for series–series compensated wireless power transfer system

“…During the process of obtaining the MEPT control method, there are approximate treatments in (14) and (16). So an inherent tracking error exists.…”

“…Compared to the traditional DC/DC converter with the tightly coupled transformer, the transmission efficiency of the WPT system is relatively low. Therefore, improving the efficiency of the WPT system has always been a research hotspot [10][11][12][13][14][15][16][17][18][19][20][21][22]. The efficiency of the WPT system is strongly affected by the variations of the system load and the coupling coefficient between the coils [17][18][19][20][21][22].…”

“…ii. Active rectifier [12][13][14]21]. The active rectifier realises impedance conversion by shunting the energy transferred into the load.…”

Analysis and Design of an Air-Coupled DC Transformer with a Hybrid Modulation Control Method

“…Introducing the small signal into the state equation of the system, the plant transfer function G p (s) between the output voltage and frequency is obtained as (14). The parameters already been considered.…”

“…Wireless power transfer (WPT) technology provides a feasible way for isolated protection [6][7][8][9][10][11][12]. The idea behind this technology is to convert electric power into spatial magnetic power, which can be coupled to the load via different means [13][14][15][16][17][18]. The known three major means to implement WPT are the inductive power transfer, resonant power transfer and radiational power transfer [19][20][21][22][23][24][25].…”