Open AccessRepeater coil‐based wireless power transfer system powering multiple gate drivers of series‐connected IGBTs
Author(s) -
Cheng Chenwen,
Wang Chao,
Zhou Zhe,
Li Weiguo,
Deng Zhanfeng,
Mi Chunting Chris
Publication year - 2020
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.2019.0982
Subject(s) - repeater (horology) , insulated gate bipolar transistor , electrical engineering , wireless power transfer , maximum power transfer theorem , electromagnetic coil , power (physics) , engineering , voltage , gate driver , bipolar junction transistor , electronic engineering , transistor , physics , mechanical engineering , quantum mechanics , coupling (piping)
It is challenging to power a large number of gate drivers of the series‐connected insulated gate bipolar transistors (IGBTs) in a high‐voltage application because multiple isolated power supplies are needed. In this study, a novel wireless power transfer (WPT) system using repeater coils is designed to solve this problem. Every two repeater coils form a repeater unit, which transfers power to one load. With multiple repeater units in the system, multiple loads can obtain power simultaneously. To eliminate undesirable magnetic couplings between these coils, bipolar coils are used and the two bipolar coils in the same repeater unit are placed perpendicularly. It is derived that constant voltage can be obtained for all the loads, which is especially suitable for powering the IGBT's gate driver. Moreover, the variation of one load power will not affect others. The receiving circuit is designed to transform the received power to the DC voltage compatible with the driving circuits. An experimental setup with six loads has been constructed to validate the proposed WPT system.