Open AccessModified parameter tuning method for LCL/P compensation topology featured with load‐independent and LCT‐unconstrained output current
Author(s) -
Yao Yousu,
Liu Xiaosheng,
Wang Yijie,
Xu Dianguo
Publication year - 2018
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.2018.0049
Subject(s) - inductor , capacitor , topology (electrical circuits) , compensation (psychology) , control theory (sociology) , transformer , voltage , maximum power transfer theorem , stress (linguistics) , power (physics) , sensitivity (control systems) , electronic engineering , electrical engineering , engineering , computer science , physics , psychology , control (management) , artificial intelligence , psychoanalysis , linguistics , philosophy , quantum mechanics
Inductive power transfer (IPT) has attracted a lot of attention in recent 30 years due to its advantages of convenience, safety, reliability and weather proof. This study proposes a modified parameter tuning method for primary inductor‐capacitor‐inductor, secondary parallel (LCL/P) compensation topology, which provides the characteristic of excellent constant current output (CCO). This characteristic is analysed on the basis of inductor‐capacitor(LC) and capacitor‐inductor (CL) resonant tanks. To lower the voltage stresses over capacitors and current stresses through inductors, the stress‐based optimisation is conducted. The sensitivity of CCO characteristic with respect to the normalised deviation of compensation parameters is analysed; therefore, the performance of LCL/P compensated IPT system in practical scenarios can be fully understood. The loosely coupled transformer (LCT) is specially designed since it has a significant impact on system efficiency, component stress, power density etc. An exhaustive search algorithm is employed to find the optimal dimensions of the LCT. A 100 W LCL/P compensated IPT prototype is fabricated. The measured end‐to‐end efficiency, from DC input to DC output, is as high as 92.8%. The output current only increases by 2.02% when the load decreases by half. All experiment results agree well with the theoretical analysis.