Open AccessLoad detection method for multiple‐receiver wireless power transfer systems
Author(s) -
Tan Linlin,
Pan Shulei,
Liu Han,
Xu Changfu,
Guo Jinpeng,
Huang Xueliang
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0987
Subject(s) - computer science , wireless power transfer , wireless , power (physics) , maximum power transfer theorem , computer network , telecommunications , physics , quantum mechanics
The influence of the changes in load quantity on a multiple‐receiver wireless power transfer (WPT) system should be minimised, so that the stability of received power for each load can be guaranteed. Here, a multiple‐receiver WPT system with an series–series topology is compared with that with an inductance‐capacitance‐inductance‐parallel (LCL‐P) topology, and a WPT system with an LCL‐P topology is selected to maintain the stability of load power. Then, the concept of effective working area is proposed. If the receivers are placed within the effective working area, the mutual inductances between receivers and transmitter are almost the same. Additionally, to realise the load detection method, which is convenient for system control purposes, reflection impedance theory is applied to detect the quantity of loads. Finally, the proposed circuit topology and detection method are practically verified in an experimental prototype.