Open AccessInductive power transfer system with constant current and constant voltage outputs for battery charging based on double‐channel T‐circuit
Author(s) -
Wu Yong,
Yang Bin,
Chen Yonghong,
Chen Yang,
Mai Ruikun
Publication year - 2021
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/pel2.12190
Subject(s) - constant current , voltage , power (physics) , maximum power transfer theorem , inverter , constant (computer programming) , electrical engineering , battery (electricity) , current (fluid) , constant voltage , control theory (sociology) , channel (broadcasting) , time constant , computer science , physics , engineering , control (management) , quantum mechanics , artificial intelligence , programming language
To ensure the safety and effectiveness of charging a battery, constant current and constant voltage (CC‐CV) charging is widely used in inductive power transfer (IPT) systems. A double‐channel T‐circuit (DT) is proposed to obtain CC output or CV output by selecting different work modes with a simple feedback control for various power demands. With the merit of the proposed circuit, fewer components are employed compared to previous work with zero phase angle (ZPA) of inverter in the whole charging process. Besides, an IPT system using DT cascaded with LCC‐S (DTLS) is proposed to improve design freedom of the charge current and charge voltage with the constraints of the magnetic coupler (MC) parameters for CC‐CV charging. Finally, a prototype with 60 V/2 A output was built to verify the theoretical analysis. The experimental results show that the fluctuation of the charging current is less than 2% in CC mode, and that of charging voltage in CV mode is within 4% with the maximum efficiency up to 93.36% during the whole charging process.