WIRELESS POWER RECEIVING APPARATUS AND WIRELESS POWER TRANSMITTING APPARATUS

• US 20150188364A1
• Filed: 12/24/2014
• Published: 07/02/2015
• Est. Priority Date: 12/27/2013
• Status: Active Application

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Kurashima, Shigemi, Akieda, Shinichiro, Shimizu, Nobuyoshi
• Application Number:
  US14/582,301
• Publication Number:
  US 20150188364A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A wireless power receiving apparatus for wirelessly receiving power from a power transmitting apparatus includes a first power receiving coil, and a second power receiving coil having windings thereof parallel to, and in close proximity to, windings of the first power receiving coil.

Claims

1. A wireless power receiving apparatus for wirelessly receiving power from a power transmitting apparatus, comprising:

a first power receiving coil; and

a second power receiving coil having windings thereof parallel to, and in close proximity to, windings of the first power receiving coil.

2. The wireless power receiving apparatus as claimed in claim 1, wherein the windings of the first power receiving coil and the windings of the second power receiving coil are arranged in bifilar winding.

3. The wireless power receiving apparatus as claimed in claim 1, wherein the first power receiving coil and the second power receiving coil are placed to overlap each other.

4. The wireless power receiving apparatus as claimed in claim 1, wherein the first power receiving coil and the second power receiving coil are in close magnetic coupling with each other.

5. The wireless power receiving apparatus as claimed in claim 1, further comprising:

a first capacitor configured to form a parallel resonance circuit with the first power receiving coil; and

a second capacitor configured to form a series resonance circuit with the second power receiving coil.

6. The wireless power receiving apparatus as claimed in claim 1, wherein the first power receiving coil is in a no-load state.

7. A wireless power transmitting apparatus for wirelessly transmitting power to a power receiving apparatus, comprising:

a first power transmitting coil; and

a second power transmitting coil having windings thereof parallel to, and in close proximity to, windings of the first power transmitting coil.