期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 36, 期 12, 页码 13562-13577出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3088272
关键词
Optical wavelength conversion; Inductance; Topology; Couplers; Resistance; Inverters; Receivers; Integrated auxiliary coil; laminated magnetic coupler (LMC); no dual-side communication; primary-side control; wireless power transfer
资金
- National Natural Science Foundation of China [51907022]
The proposed primary-side control method for wireless charging system achieves high precision CC/CV charging, reduces the influence of horizontal misalignment on estimation accuracy, and ensures controllability of charging current.
To realize the misalignment insensitivity and stable constant current/voltage (CC/CV) charging without using the extra dc-dc converter, composite compensation topology, and wireless communication modules, a primary-side control method based on the phase-shift full-bridge inverter and the laminated magnetic coupler (LMC) is proposed for the wireless charging system. First, the load-independent output current and voltage characteristics for the series-series compensation are analyzed. The equations for estimating the charging current and voltage are deduced by only using the primary-side parameters. Second, the excellent antimisalignment capability of the LMC with the primary-side integrated auxiliary coil is verified. As a result, the influence of horizontal misalignment on the estimation precision is reduced; the controllability of the charging current is ensured. Third, the dual-loop cascade PI controller is designed, and CC/CV charging is realized by adjusting the phase-shift angle. Finally, both the simulation and experimental results show that the primary-side control method realizes CC/CV charging with high precision within the reasonable horizontal misalignment range. Compared to the conventional primary-side control methods, the proposed one avoids both the load resistance estimation and mutual inductance identification. Meanwhile, the compact and lightweight receiver module is ensured.
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