SPREAD SPECTRUM WIRELESS RESONANT POWER DELIVERY

• US 20100034238A1
• Filed: 09/30/2008
• Published: 02/11/2010
• Est. Priority Date: 08/05/2008
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Bennett, James D.
• Application Number:
  US12/241,268
• Publication Number:
  US 20100034238A1
• Time in Patent Office: Days
• US Class Current: 375/130
• 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 50/40 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 7/0048 Detection of remaining charge capacity or state of charge [SOC]

Abstract

Wirelessly delivering electric power to a target device. Operation includes generating a spread spectrum sequence, generating spread spectrum alternating current power based upon the spread spectrum sequence, coupling the spread spectrum alternating current power to a transmitting element for wireless power transmission by a non-radiated magnetic field, dynamically tuning the wireless power transmission according to the spread spectrum sequence, and communicating the spread spectrum sequence to the target device. The spread spectrum sequence may include a frequency hopping sequence and/or a phase hopping sequence. Communicating the spread spectrum sequence to the target device may employ Radio Frequency (RF) communications and be used to exchange a target device identity, target device billing information, target device power receipt level(s), a target device battery charge state, a request for power delivery from the target device, and/or authentication information from the target device.

Claims

1. A spread spectrum power delivery system for wirelessly delivering electric power to a target device, the spread spectrum power delivery system comprising:

a spread spectrum power source comprising;

a power source operable to source spread spectrum alternating current power;

a sending resonant coupling component operable to couple the spread spectrum alternating current power to a transmitting element for wireless power transmission by a non-radiated magnetic field;

the spread spectrum power source capable of dynamically tuning the wireless power transmission according to a spread spectrum sequence; and

a communication module coupled to the spread spectrum power source and operable to communicate the spread spectrum sequence to the target device.

2. The spread spectrum power delivery system of claim 1, wherein the sending resonant coupling component comprises a coil that is operable to source the non-radiated magnetic field.

3. The spread spectrum power delivery system of claim 1, wherein the sending resonant coupling component forms the non-radiated magnetic field substantially omni-directionally.

4. The spread spectrum power delivery system of claim 1, wherein the sending resonant coupling component forms the non-radiated magnetic field directionally.

5. The spread spectrum power delivery system of claim 1, wherein the spread spectrum sequence comprises a frequency hopping sequence.

6. The spread spectrum power delivery system of claim 1, wherein the spread spectrum sequence comprises a phase hopping sequence.

7. The spread spectrum power delivery system of claim 1, wherein the communication module comprises a Radio Frequency (RF) interface.

8. The spread spectrum power delivery system of claim 7, wherein the RF interface is operable to receive data from the target device that comprises at least one of:

a target device identity;

target device billing information;

target device power receipt level(s); and

a target device battery charge state.

9. The spread spectrum power delivery system of claim 7, wherein the RF interface is operable to receive a request for power delivery from the target device.

10. The spread spectrum power delivery system of claim 7, wherein the RF interface is operable to receive authentication information from the target device.

11. The spread spectrum power delivery system of claim 1, wherein the spread spectrum power source further comprises:

a pseudo random sequence generator operable to generate a pseudo random sequence; and

a synthesizer oscillator operable to produce a frequency input to the power source used for generating the spread spectrum alternating current power.

12. A method for wirelessly delivering electric power to a target device, the method comprising:

generating a spread spectrum sequence;

generating spread spectrum alternating current power based upon the spread spectrum sequence;

coupling the spread spectrum alternating current power to a transmitting element for wireless power transmission by a non-radiated magnetic field;

dynamically tuning the wireless power transmission according to the spread spectrum sequence; and

communicating the spread spectrum sequence to the target device.

13. The method of claim 12, further comprising forming the non-radiated magnetic field substantially omni-directionally.

14. The method of claim 12, further comprising forming the non-radiated magnetic field directionally.

15. The method of claim 12, wherein the spread spectrum sequence comprises a frequency hopping sequence.

16. The method of claim 12, wherein the spread spectrum sequence comprises a phase hopping sequence.

17. The method of claim 12, communicating the spread spectrum sequence to the target device employs Radio Frequency (RF) communications.

18. The method of claim 17, further comprising RF communicating information from the target device that comprises at least one of:

a target device identity;

target device billing information;

target device power receipt level(s); and

a target device battery charge state.

19. The method of claim 17, further RF communicating information from the target device that comprises a request for power delivery from the target device.

20. The method of claim 17, further RF communicating information from the target device that comprises authentication information from the target device.

21. The method of claim 12, wherein generating a spread spectrum sequence comprises:

generating a pseudo random sequence; and

producing the spread spectrum alternating current power based upon the pseudo random sequence.