Load-Independent Constant-Current/Zero-Current Switching Inverter with Series Resonant Filter

Komiyama, Yutaro; Zhu, Wenqi; Nguyen, Kien; Sekiya, Hiroo

doi:10.1109/apec43580.2023.10131467

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Class-E [12] ZVS CV Series Class-Φ [13] ZVS CV Series Class-E/F [14] ZVS CC Series Class-E −1 [15] ZCS CV Parallel Class-E [16] ZVS CC Parallel Class-E −1 [17] ZCS CC Series Class-E [18] ZVS CC Parallel against load variations. The inverter works with the LI mode even against coil misalignment because the output reactance of the transmitter is consistent in the proposed configuration.…”

Section: Switching Type Output Resonant Filtermentioning

confidence: 99%

“…Meanwhile, it is limited only to S-S coupling having a specific rectifier when the coil misalignment is also considered. The obtained design guideline suggests that the transmitter topology is limited to the series-resonant LI inverters, for example, in [12]- [14], [17], as given in Table 1. Based on the obtained design guideline, we can state that there is a case where the LI operation cannot be achieved by simply applying the post regulator.…”

Section: Comparison With Previous Workmentioning

confidence: 99%

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Analysis and Design of High-Frequency WPT System Using Load-Independent Inverter With Robustness Against Load Variations and Coil Misalignment

Komiyama,

Komanaka,

Ota

et al. 2024

IEEE Access

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This paper presents an analysis and design of the load-independent (LI) high-frequency magnetic resonant wireless power transfer (MR-WPT) system with robustness against load variations and coil misalignments. It is clarified from the analysis that robustness against load variations and coil misalignment can be obtained when LI inverter, series-resonant to series-resonant (S-S) coupling topology, inputreactance invariant rectifier against load variations, and post regulator are adopted. The output reactance of the transmitter does not vary against load variations and coil misalignment. Therefore, the inverter works with the LI mode, achieving soft switching without control. As a result, the system ensures soft switching and output regulation against both load variations and coil misalignment without wireless communication feedback. The design example of the system with LI class-E/F inverter, class-D rectifier, and buck converter is given. The quantitative agreements between the analytical prediction and experiment show the effectiveness and validity of the system and its analysis.

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