Open AccessSegmental switching strategy with zero output pulsation for dynamic EV wireless charging system
Author(s) -
Zhu Qingwei,
Guo Yanjie,
Li Shufan,
Wang Lifang,
Liao Chenglin
Publication year - 2019
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.2018.5032
Subject(s) - decoupling (probability) , electromagnetic coil , wireless , computer science , inductive charging , zero crossing , electric vehicle , electrical engineering , control theory (sociology) , fast switching , power (physics) , engineering , voltage , telecommunications , physics , control engineering , control (management) , artificial intelligence , quantum mechanics
In practical dynamic electric vehicle (EV) wireless charging applications, the charging roadway is segmented and the segments are switched on and off along with the passing‐by EVs, which often causes output power pulsations. Here, the decoupling characteristics of two general inductively coupled coils are investigated. Based on which, an easy‐implement switching strategy to minimise the output power pulsation in the repeatedly occurring segmental switches is proposed. Each segment is to be switched on when a coming EV passes the entry‐end decoupling point of that segment, and to be cut‐off when the vehicle passes the other decoupling point as it leaves from the other end. Practical issues regarding to the coil dimensions have also been studied to investigate the compatibility of the proposed method. Dynamic charging and segmental switching experiments on a predesigned 2.5 kW dynamic wireless charging prototype were conducted to testify the proposed method. Smooth transition with zero output power pulsation and noticeable improvement on the systematic efficiency over the transition zone were achieved.