CONTACTLESS POWER RECEIVING APPARATUS, POWER RECEIVING METHOD FOR CONTACTLESS POWER RECEIVING APPARATUS AND CONTACTLESS POWER SUPPLYING SYSTEM

• US 20110006612A1
• Filed: 05/27/2010
• Published: 01/13/2011
• Est. Priority Date: 07/07/2009
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: KOZAKAI, Osamu
• Granted Patent: US 8,872,383 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 1/14 Balancing the load in a network
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

Disclosed herein is a contactless power receiving apparatus, including a resonance element adapted to receive supply of AC power in a contactless fashion by resonance from a resonance element of a power supplying source; an excitation element adapted to receive supply of the AC power by electromagnetic induction from the resonance element; a rectification circuit adapted to generate DC power from the AC power from the excitation element and output the DC power; and a changeover circuit adapted to change over the AC power between a supplied state and a non-supplied state to the rectification circuit.

Claims

1. A contactless power receiving apparatus, comprising:

a resonance element adapted to receive supply of alternating-current power in a contactless fashion by resonance from a resonance element of a power supplying source;

an excitation element adapted to receive supply of the alternating-current power by electromagnetic induction from said resonance element;

a rectification circuit adapted to generate direct-current power from the alternating-current power from said excitation element and output the direct-current power; and

a changeover circuit adapted to change over the alternating-current power between a supplied state and a non-supplied state to said rectification circuit.

2. The contactless power receiving apparatus according to claim 1, wherein said changeover circuit is interposed between said excitation element and said rectification circuit.

3. The contactless power receiving apparatus according to claim 1, wherein said changeover circuit includes a capacitor and a switch circuit connected to said resonance element which receives supply of the alternating-current power.

4. The contactless power receiving apparatus according to claim 1, further comprising:

acceptance means for accepting a setting input of a priority degree regarding reception of power from a user;

short distance radio communication means; and

control means for communicating with a different contactless power receiving apparatus through said short distance radio communication means and controlling said changeover circuit so that said contactless power receiving apparatus and the different contactless power receiving apparatus may not receive supply of power at the same time taking the priority degrees regarding reception of power of said contactless power receiving apparatus and the different contactless power receiving apparatus into consideration.

5. The contactless power receiving apparatus according to claim 1, wherein the resonance element of the power supplying source and said resonance element which receives supply of the alternating-current power from said resonance element of the power supplying source are connected to each other by magnetic field resonance.

6. A contactless power receiving apparatus, comprising:

a plurality of contactless power receiving apparatus sections each including

a resonance element adapted to receive supply of alternating-current power in a contactless fashion by resonance from a resonance element of a power supplying source,

an excitation element adapted to receive supply of the alternating-current power by electromagnetic induction from said resonance element,

a rectification circuit adapted to generate direct-current power from the alternating-current power from said excitation element and output the direct-current power, and

a changeover circuit adapted to change over the alternating-current power between a supplied state and a non-supplied state to said rectification circuit;

acceptance means for accepting a priority degree of power reception for each of said contactless power receiving apparatus sections; and

control means for controlling the changeover timing of said changeover circuit of each of said contactless power receiving apparatus sections in response to the priority degree of power reception of the contactless power receiving apparatus section accepted through said acceptance means.

7. The contactless power receiving apparatus according to claim 6, wherein the resonance element of the power supplying source and said resonance element which receives supply of the alternating-current power from said resonance element of the power supplying source are connected to each other by magnetic field resonance.

8. A power receiving method for a contactless power receiving apparatus, comprising the steps of:

carried out by a resonance element, which has a resonance relationship with a resonance element of a power supplying source, receiving alternating-current power in a contactless fashion by resonance from the resonance element of the power supplying source;

carried out by an excitation element, receiving the alternating-current power from the resonance element of the contactless power receiving apparatus by electromagnetic induction;

carried out by a changeover circuit, selectively permitting supply therethrough of the alternating-current power received by the excitation element; and

carried out by a rectification circuit, receiving the alternating-current power when the supply of the alternating-current power is permitted by the changeover circuit and generating direct-current power from the received alternating-current power.

9. A contactless power supply system, comprising:

a contactless power supplying apparatus including a resonance element adapted to supply alternating-current power in a contactless fashion by resonance, an excitation element adapted to supply alternating-current power to said resonance element by electromagnetic induction, and an alternating-current power supply section adapted to generate alternating-current power of a frequency corresponding to a resonance frequency of said resonance element and supply the generated alternating-current power to said excitation element; and

a contactless power receiving apparatus including a resonance element adapted to receive supply of the alternating-current power in a contactless fashion by resonance from said resonance element of said contactless power supplying apparatus, an excitation element adapted to receive supply of the alternating-current power by electromagnetic induction from said resonance element, a rectification circuit adapted to generate direct-current power from the alternating-current power from said excitation element and output the direct-current power, and a changeover circuit adapted to change over the alternating-current power between a supplied state and a non-supplied state to said rectification circuit.