Resonant type power transmission antenna device

• US 10,003,128 B2
• Filed: 12/26/2013
• Issued: 06/19/2018
• Est. Priority Date: 12/26/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Engineering Co Ltd (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Engineering Co Ltd (Mitsubishi Electric Corporation)
• Inventors: Akuzawa, Yoshiyuki, Sakai, Kiyohide, Ezoe, Toshihiro, Ito, Yuki
• Primary Examiner(s): Nguyen, Hoang
• Application Number:
  US15/103,974
• Publication Number:
  US 20160315383A1
• Time in Patent Office: 1,636 Days
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: H01Q 1/526 Electromagnetic shields
• CPC Class Codes: H01Q 21/00 Antenna arrays or systems arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

Disclosed is a resonant type power transmission antenna device provided with a plurality of transmission antennas 12 and a plurality of reception antennas 13, the resonant type power transmission antenna device including a transmission shield antenna 22 arranged between the plurality of transmission antennas 12, a reception shield antenna 23 arranged between the plurality of reception antennas 13, transmission and reception circuits 21 and 24 to operate the transmission and reception shield antennas 22 and 23 in electromagnetic field resonance having a phase opposite to that of the transmission and reception antennas 12 and 13 respectively adjacent to the transmission and reception shield antennas.

Claims

1. A wireless power transmission device comprising:

a power transmission antenna that transmits electric power;

a power reception antenna that receives electric power from said power transmission antenna and supplies received electric power to a load equipment; and

a shield antenna that generates electromagnetic fields having a phase opposite to said power transmission antenna and said power reception antenna,

wherein said power transmission antenna is arranged inside a transmission side of said shield antenna; and

said power reception antenna is arranged inside a reception side of said shield antenna.

2. The wireless power transmission device according to claim 1, wherein said power reception antenna is arranged inside said power transmission antenna, and

a reception side of said shield antenna is arranged inside a transmission side of said shield antenna.

3. The wireless power transmission device according to claim 2, wherein a reception side of said shield antenna dose not supply electric power from a transmission side of said shield antenna to said load equipment.

4. The wireless power transmission device according to claim 2, further comprising a shielding member disposed outside a transmission side of said shield antenna.

5. The wireless power transmission device according to claim 1, wherein a reception side of said shield antenna dose not supply electric power from a transmission side of said shield antenna to said load equipment.

6. The wireless power transmission device according to claim 1, further comprising shielding members disposed outside a transmission and a reception side of said shield antenna.