Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 9, Issue 4, Pages 4918-4931Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2020.3036639
Keywords
Capacitors; Topology; Inverters; Capacitance; Switches; Network topology; Couplings; Current fed; inductive power transfer (IPT); misalignment; variable capacitor (VC); zero-phase-angle (ZPA)
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Funding
- Guangdong Province Basic and Applied Basic Research [2019A1515110174]
- Shenzhen Science and Technology Plan Project [JCYJ20180507181539943]
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This study introduces a new parallel-series/series current-fed IPT system with a focus on achieving ZPA operation and constant output voltage at a fixed frequency. The detailed analysis of the variable capacitors network and comparison with existing topologies are conducted, with experimental results confirming the system's performance.
Zero-phase-angle (ZPA) operation is considered as a method to minimize the volt-ampere (VA) ratings and maximize transfer power to the load in the inductive power transfer (IPT) system. However, the ZPA operating prerequisite is quite sensitive to the variation of parameters such as IPT system coupling coefficient and load conditions. A parallel-series/series (PS/S) current-fed IPT system with a new variable capacitors (VCs) structure is proposed to achieve ZPA operation and constant output voltage at fixed frequency. The detailed analysis and mathematical model of the VCs network are reported. The proposed VCs structures in PS/S current-fed IPT system are discussed, analyzed, and compared with existing competitive topologies in the literature. The experimental results obtained from 65-W lab-prototypes are demonstrated to verify the analysis and performance.
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