METHOD AND APPARATUS FOR POWER TRANSFER FOR A PORTABLE ELECTRONIC DEVICE

• US 20160248265A1
• Filed: 02/25/2015
• Published: 08/25/2016
• Est. Priority Date: 02/25/2015
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: FAM, FOOK TENG, OO, WEI LUN, CHONG, CHEE KHON, LEE, SIN KENG
• Granted Patent: US 9,537,321 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A41D 1/005 with embedded cable or connector
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/502 the energy repeater being integrated together with the emitter or the receiver
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A power transfer interface (120) is formed of a primary repeater coil (104) and one or more secondary repeater coils (106) coupled via a wired interconnect (110), and integrated within a garment (114). The repeater coils operate as part of a wireless charging or powering system in which a transmit coil (102), located in a vehicle or a radio, is driven to magnetically couple a wireless radio frequency (RF) power signal to the primary repeater coil (104) which in turn transfers the RF power signal to the secondary repeater coil (106) via the wired interconnect (110). The system further comprises a portable electronic device (220) having a receive coil (108). The receive coil (108) wirelessly receives the RF power signal from the secondary repeater coil (106), which can in turn be used to power the portable device or charge a battery of the portable device.

Claims

9. A power transfer system, comprising:

a power source having a transmit coil which is driven to transmit a radio frequency (RF) power signal;

a primary repeater coil for receiving the RF power signal via magnetic coupling;

a secondary repeater coil coupled to the primary repeater coil via a wired interconnect, the wired interconnect for routing RF power signal from the primary repeater coil to the secondary repeater coil; and

at least one portable electronic device having a receive coil, the receive coil for wirelessly receiving the RF power signal from the secondary repeater coil.

1. A power transfer apparatus, comprising:

a garment;

a primary repeater coil integrated within the garment; and

at least one secondary repeater coil integrated within the garment and coupled to the primary repeater coil via a wired interconnect.

2. The power transfer apparatus of claim 1, the primary repeater coil for receiving a magnetically coupled wireless radio frequency (RF) power signal.

3. The power transfer apparatus of claim 2, the primary repeater coil for transferring the RF power signal to the at least one secondary repeater coil over the wired interconnect.

4. The power transfer apparatus of claim 3, wherein the at least one secondary repeater coil wirelessly transfers the RF power signal to a receive coil of a portable electronic device.

5. The power transfer apparatus of claim 1, wherein the at least one secondary repeater coil comprises a plurality of secondary repeater coils wired to the primary repeater coil.

6. The power transfer apparatus of claim 1, wherein the at least one secondary repeater coil is positioned within the garment to align and proximately couple with respective receive coils of body worn portable electronic devices.

7. The power transfer apparatus of claim 1, wherein the primary repeater coil is positioned within the garment to align and proximately couple with a transmit coil integrated in a vehicle.

8. The power transfer apparatus of claim 1, wherein the primary repeater coil is positioned within the garment to align and proximately couple with a transmit coil integrated in a body-worn portable radio.

10. The power transfer system of claim 9, wherein the receive coil powers an element of the at least one portable electronic device.

11. The power transfer system of claim 9, wherein the RF power signal received by the receive coil charges a battery of the at least one portable electronic device.

12. The power transfers system of claim 9, wherein the transmit coil is integrated within a portion of a vehicle, and the power source comprises an in-vehicle power source.

13. The power transfer system of claim 9, wherein the power source comprises a portable radio having a transmit coil, the transmit coil magnetically coupling the RF power signal to the primary repeater coil.

14. The power transfer system of claim 13, each of the plurality of secondary repeater coils for aligning and proximately coupling with a respective receive coil of each of the at least one portable electronic device.

15. The power transfer system of claim 9, wherein the at least one portable electronic device having the receive coil comprises a remote speaker microphone (RSM).

16. The power transfer system of claim 9, wherein the at least one portable electronic device having the receive coil comprises a sensor, a camera, a BLUETOOTH accessory, or a WiFi accessory.

12-1. The power transfer system of claim 9, wherein the primary repeater coil and the secondary repeater coil are integrated within a garment.

13-1. The power transfer system of claim 9, wherein:

the primary repeater coil aligns and proximately couples with the transmit coil; and

the primary repeater coil is wired to a plurality of secondary repeater coils.

17. A method for power transfer in a portable system, comprising:

receiving a radio frequency (RF) power signal at a primary repeater coil;

transferring the RF power signal from the primary repeater coil to at least one secondary repeater coil over a wired interconnect; and

magnetically coupling the transferred RF power signal from the at least one secondary repeater coil to at least one portable electronic device having a receive coil.

18. The method of claim 17, wherein receiving the radio frequency (RF) power signal at the primary repeater coil further comprises:

magnetically coupling the RF power signal from a transmit coil to the primary repeater coil.

19. The method of claim 17, wherein prior to receiving the method further comprises:

powering an in-vehicle transmit coil from an in-vehicle power source to generate the RF power signal.

20. The method of claim 17, wherein prior to receiving the method further comprises:

powering an in-radio transmit coil from a portable radio power source to generate the radio frequency (RF) power signal.

21. (canceled)

22. (canceled)

23. (canceled)