WIRELESS POWER TRANSFER DEVICE

• US 20120119587A1
• Filed: 08/05/2011
• Published: 05/17/2012
• Est. Priority Date: 11/12/2010
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHEON, Sang Hoon, KIM, Yong Hae, LEE, Myung Lae, KANG, Seung Youl, ZYUNG, Taehyoung
• Application Number:
  US13/204,331
• Publication Number:
  US 20120119587A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• 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

Abstract

Provided is a wireless power transfer device. The wireless power transfer device includes an power generator, and two or more non-radiative electromagnetic wave generators. The power generator generates AC type of power. The non-radiative electromagnetic wave generators receive the power, and generate non-radiative electromagnetic waves through resonance. The non-radiative electromagnetic wave generators are disposed to form a wireless power transfer-enabled transfer area.

Claims

1. A wireless power transfer device comprising:

an power generator generating AC type of power; and

two or more non-radiative electromagnetic wave generators receiving the power, and generating non-radiative electromagnetic waves through resonance,

wherein the non-radiative electromagnetic wave generators are disposed to form a wireless power transfer-enabled transfer area.

2. The wireless power transfer device of claim 1, wherein each of the non-radiative electromagnetic wave generators comprises:

a transmit resonance coil receiving the power, and generating the non-radiative electromagnetic waves through resonance; and

a drive coil delivering the power to the transmit resonance coil which receives an Alternating Current (AC) signal corresponding to the generated power to resonate.

3. The wireless power transfer device of claim 2, wherein resonance frequencies of the respective transmit resonance coils of the non-radiative electromagnetic wave generators are the same.

4. The wireless power transfer device of claim 2, further comprising a resonance frequency regulator regulating a resonance frequency of the transmit resonance coil of the each non-radiative electromagnetic wave generator.

5. The wireless power transfer device of claim 4, wherein the resonance frequency regulator comprises a variable capacitor serially connected to the transmit resonance coil.

6. The wireless power transfer device of claim 1, wherein the non-radiative electromagnetic wave generators are disposed at vertices of a polygon, respectively.

7. The wireless power transfer device of claim 1, wherein the non-radiative electromagnetic wave generators are disposed at a circumference of a circle, respectively.

8. The wireless power transfer device of claim 1, wherein the non-radiative electromagnetic wave generators are disposed symmetrically about the center of the transfer area.