Three-phase wireless power transfer system and three-phase wireless chargeable unmanned aerial vehicle system based on the same
First Claim
1. A three-phase wireless-chargeable unmanned aerial vehicle (UAV), comprising:
- a flight vehicle including at least three landing legs;
a three-phase power reception unit, including three coil winding members provided on three landing legs and provided as magnetic paths of magnetic fluxes, and three power receiving coils that are wound around or built in the three coil winding members respectively and connected to each other in a Y-connection or Δ
-connection, for wirelessly receiving power from a three-phase wireless power transfer (WPT) apparatus through three-phase alternating currents (AC) which are induced by three-phase alternating magnetic fluxes, generated by the three-phase WPT apparatus, that interlink with the three power receiving coils, respectively;
a three-phase power converter, being installed in the flight vehicle, for converting the three-phase ACs induced in the three power receiving coils into a direct current (DC); and
a battery, being installed in the flight vehicle, for charging the DC output from the three-phase power converter.
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Accused Products
Abstract
Disclosed are a three-phase wireless power transfer (WPT) system and three-phase wireless rechargeable unmanned aerial vehicle (UAV) system based on the same. Three power receiving coils, including resonators, are installed at the ends of three landing leg of the UAV. A three-phase power converter installed in the UAV receives the three-phase AC induction current induced in three power receiving coils, including resonators, converting the three-phase AC induction current into a DC current to be charged in a battery. A three-phase power wireless charging apparatus wirelessly transfers three-phase power from three power transmitting coils to the three power receiving coils of the UAV when the three landing legs land on three coil seating units provided on a charging platform. A magnetic flux leakage shielding coil may be provided to prevent magnetic flux leakage from approaching the UAV. The power transfer efficiency is excellent, and electromagnetic interference can be also reduced.
29 Citations
20 Claims
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1. A three-phase wireless-chargeable unmanned aerial vehicle (UAV), comprising:
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a flight vehicle including at least three landing legs; a three-phase power reception unit, including three coil winding members provided on three landing legs and provided as magnetic paths of magnetic fluxes, and three power receiving coils that are wound around or built in the three coil winding members respectively and connected to each other in a Y-connection or Δ
-connection, for wirelessly receiving power from a three-phase wireless power transfer (WPT) apparatus through three-phase alternating currents (AC) which are induced by three-phase alternating magnetic fluxes, generated by the three-phase WPT apparatus, that interlink with the three power receiving coils, respectively;a three-phase power converter, being installed in the flight vehicle, for converting the three-phase ACs induced in the three power receiving coils into a direct current (DC); and a battery, being installed in the flight vehicle, for charging the DC output from the three-phase power converter. - View Dependent Claims (2, 3, 4)
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5. A three-phase wireless-charging apparatus for an unmanned aerial vehicle (UAV), comprising:
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a charging platform including a coil seating unit for seating three power receiving coils that are connected to each other in a Y-connection or A-connection and installed in the UAV for wirelessly receiving electric power; and a three-phase power transmission unit including three power transmitting coils, being installed in the coil seating unit and connected to each other in a Y-connection or Δ
-connection, for forming three magnetic fields in the coil seating unit by flowing three-phase ACs,wherein when the three power receiving coils are seated on the coil seating unit, the three power transmitting coils are magnetically coupled with the three power receiving coils through the three magnetic fields, thereby wirelessly transferring three-phase power to the three power receiving coils. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A three-phase wireless power transfer (WPT) system, comprising:
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a three-phase power transmission unit including three power transmitting coils for generating magnetic fields by allowing three-phase alternating currents to flow, respectively, and transmitter resonators, being coupled to the three power transmitting coils respectively, for allowing resonant currents to flow for minimizing a reactive power in a system; and a three-phase power reception unit including three power receiving coils which are arranged to be paired with the three power transmitting coils one to one such that each of the three power receiving coils is interlinked with the magnetic flux generated by each of the three power transmitting coils, thereby allowing an induced current to flow by the magnetic flux interlinkage; and
three receiver resonators added to each of the three power receiving coils so as to allow resonant currents to flow for minimizing the reactive power in the system. - View Dependent Claims (18, 19, 20)
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Specification