Contactless power receiving apparatus, power receiving method for contactless power receiving apparatus and contactless power supplying system

• US 8,872,383 B2
• Filed: 05/27/2010
• Issued: 10/28/2014
• 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
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Pham, Duc M
• Application Number:
  US12/788,868
• Publication Number:
  US 20110006612A1
• Time in Patent Office: 1,615 Days
• Field of Search: 307/104
• 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 operable 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 operable to receive supply of said alternating-current power by electromagnetic induction from said resonance element;

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

a control circuit operable to;

determine whether a request to transmit priority degree information is received;

transmit said request to one or more other contactless power receiving apparatuses in response to determining that said request is not received;

receive said priority degree information from said one or more other contactless power receiving apparatuses; and

transmit a pulse generation timing to said one or more other contactless power receiving apparatuses based on said received priority degree information; and

a changeover circuit operable to change over said alternating-current power between a supplied state and a non-supplied state to said rectification circuit based on said pulse generation timing,

wherein said contactless power receiving apparatus is operable to output a warning message when a total value of priority degrees of said contactless power receiving apparatus and said one or more other contactless power receiving apparatuses exceeds 100%.

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 said alternating-current power.

4. The contactless power receiving apparatus according to claim 1, wherein said control circuit is operable to:

accept an input for setting a priority degree regarding reception of power from a user;

control communication with said one or more other contactless power receiving apparatuses through short distance radio communication; and

control a changeover timing of said changeover circuit so that said contactless power receiving apparatus and said one or more other contactless power receiving apparatuses may not receive supply of power at a same time based on said pulse generation timing.

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

6. The contactless power receiving apparatus according to claim 1, wherein said contactless power receiving apparatus is operable to output another warning message when a priority degree of said contactless power receiving apparatus exceeds 100%.

7. The contactless power receiving apparatus according to claim 1, wherein said priority degree information comprises identification information of said one or more other contactless power receiving apparatuses.

12. The contactless power receiving system according to claim 6, wherein each of said one or more contactless power receiving apparatuses is operable to output another warning message when a priority degree of said each of said one or more contactless power receiving apparatuses exceeds 100%.

13. The contactless power receiving system according to claim 6, wherein said priority degree information comprises identification information of said other of said one or more other contactless power receiving apparatuses.

8. A contactless power receiving system, comprising:

one or more contactless power receiving apparatuses, wherein each of said one or more contactless power receiving apparatuses comprises;

a resonance element operable 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 operable to receive supply of said alternating-current power by electromagnetic induction from said resonance element;

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

a control circuit operable to;

determine whether a request to transmit priority degree information is received;

transmit said request to other of said one or more contactless power receiving apparatuses in response to determining that said request is not received;

receive said priority degree information from said other of said one or more contactless power receiving apparatuses; and

transmit a pulse generation timing to said other of said one or more contactless power receiving apparatuses based on said received priority degree information; and

a changeover circuit operable to change over said alternating-current power between a supplied state and a non-supplied state to said rectification circuit based on said pulse generation timing,

wherein each of said one or more contactless power receiving apparatuses is operable to output a warning message when a total value of priority degrees of said one or more contactless power receiving apparatuses exceeds 100%.

9. The contactless power receiving system according to claim 8, wherein said resonance element of said power supplying source and said resonance element which receives supply of said alternating-current power from said resonance element of said power supplying source are connected to each other by magnetic field resonance.

10. The contactless power receiving system according to claim 8, wherein each of said one or more contactless power receiving apparatuses is operable to accept an input from a user for setting a priority degree regarding reception of power.

11. The contactless power receiving system according to claim 8, wherein said power supplying source supplies power to said rectification circuit of each of said one or more contactless power receiving apparatuses during periods corresponding to individual priorities that do not overlap with each other.

14. A power receiving method for a contactless power receiving apparatus, the method comprising:

receiving alternating-current power in a contactless fashion by resonance from a resonance element of a power supplying source,

wherein said alternating-current power is received by electromagnetic induction;

determining whether a request to transmit priority degree information is received;

transmitting said request to one or more other contactless power receiving apparatuses in response to determining that said request is not received;

receiving said priority degree information from said one or more other contactless power receiving apparatuses;

transmitting a pulse generation timing to said one or more other contactless power receiving apparatuses based on said received priority degree information;

controlling a changeover circuit for selectively permitting supply therethrough of said received alternating-current power based on said pulse generation timing; and

receiving said alternating-current power when said supply of said alternating-current power is permitted by said changeover circuit and generating direct-current power from said received alternating-current power,

wherein said contactless power receiving apparatus is operable to output a warning message when a total value of priority degrees of said contactless power receiving apparatus and said one or more other contactless power receiving apparatuses exceeds 100%.

15. A contactless power supply system, comprising:

a contactless power supplying apparatus comprising;

a resonance element operable to supply alternating-current power in a contactless fashion by resonance;

an excitation element operable to supply alternating-current power to said resonance element by electromagnetic induction; and

an alternating-current power supply section operable to generate alternating-current power of a frequency corresponding to a resonance frequency of said resonance element and supply said generated alternating-current power to said excitation element; and

a contactless power receiving apparatus comprising;

a resonance element operable to receive supply of said alternating-current power in said contactless fashion by resonance from said resonance element of said contactless power supplying apparatus;

an excitation element operable to receive supply of said alternating-current power by electromagnetic induction from said resonance element of said contactless power receiving apparatus;

a rectification circuit operable to generate direct-current power from said alternating-current power from said excitation element of said contactless power receiving apparatus and output said direct-current power;

a control circuit operable to;

determine whether a request to transmit priority degree information is received;

transmit said request to one or more other contactless power receiving apparatuses in response to determining that said request is not received;

receive said priority degree information from said one or more other contactless power receiving apparatuses;

transmit a pulse generation timing to said one or more other contactless power receiving apparatuses based on said received priority degree information; and

a changeover circuit operable to change over said alternating-current power between a supplied state and a non-supplied state to said rectification circuit based on said pulse generation timing,

wherein said contactless power receiving apparatus is operable to output a warning message when a total value of priority degrees of said contactless power receiving apparatus and said one or more other contactless power receiving apparatuses exceeds 100%.