Wireless Power Transfer Resonance Coupling Amplification by Load-Modulation Switching Controller

Cited 60 time in webofscience Cited 68 time in scopus
  • Hit : 318
  • Download : 0
This paper proposes that transmitter-to-receiver resonator efficiency can be enhanced by the novel combination of resonator and switching controller at the receiver side. More specifically, the switching controller modulates the load resistance such that the receiver resonance is amplified. This increases the loaded-Q, reflected resistance, and, subsequently, overall efficiency and distance range. The efficiency and distance range are superior than resonator-only receivers, despite of losses from the switching controller itself. This breaks the common routine that typical switching converters only lower the power flow and efficiency when they are inserted in wireless power chain. Moreover, the scheme solves the common problem of load-variation-induced efficiency degradation. More specifically, if the present load value is deviated from optimal point, the proposed controller adjusts the effective load resistance to amplify the reflected resistance. The loaded-Q amplification is easily controlled simply by changing the duty ratio of switching controller. This is more feasible than traditional impedance transformation network whose control requires large array of capacitor-switch matrix or movement of coil position. The efficiencies with and without the switching-controlled resonance amplification are 60.2% and 51.7%, respectively, for a 20-W loading at 15-cm distance for a 20 cm x 16 cm receiver.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2015-02
Language
English
Article Type
Article
Keywords

TRANSFER SYSTEMS; RESONATORS; VOLTAGE; DESIGN; OUTPUT

Citation

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.62, no.2, pp.898 - 909

ISSN
0278-0046
DOI
10.1109/TIE.2014.2336627
URI
http://hdl.handle.net/10203/195785
Appears in Collection
EE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 60 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0