A 95% efficient inverter with 300-W power output for 6.78-MHz magnetic resonant wireless power transfer system

We developed a high-power Class-E inverter for a 6.78-MHz magnetic resonant wireless power transfer system. The inverter consisted of six synchronized coupled low-power inverters; the outputs were combined after the corresponding matching circuit. We attained a drain efficiency of 94.6% at the power...

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Bibliographic Details
Main Authors: Akuzawa, Y., Tsuji, K., Matsumori, H., Ito, Y., Ezoe, T., Sakai, K.
Format: Conference Proceeding
Language:English
Subjects:
DC-AC power converters
Frequency conversion
Impedance matching
inductive power transmission
Logic gates
Magnetic resonance
power amplifiers
power transmission
Resonant inverters
Switches
Synchronization
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Description
Summary:We developed a high-power Class-E inverter for a 6.78-MHz magnetic resonant wireless power transfer system. The inverter consisted of six synchronized coupled low-power inverters; the outputs were combined after the corresponding matching circuit. We attained a drain efficiency of 94.6% at the power output of 315 W. In addition, we demonstrated a wireless power transfer system consisting of the Class-E inverter, a pair of magnetic resonant coils 200 mm in diameter separated at an air-gap distance of 42 mm, and a diode bridge rectifier. The system achieved a dc-dc efficiency of 84.7% at a power output of 301 W.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2015.7166894