WIRELESS OR WIRED POWER DELIVERY USING A CONTROLLABLE POWER ADAPTER

• US 20160006267A1
• Filed: 07/06/2015
• Published: 01/07/2016
• Est. Priority Date: 07/07/2014
• Status: Active Grant

• Current Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Original Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Inventors: Muratov, Vladimir A., Satyamoorthy, Anand
• Granted Patent: US 10,148,096 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02M 1/0048 Circuits or arrangements for reducing losses using snubbers H02M1/34
• CPC Class Codes: H02M 7/02 Conversion of ac power input into dc power output without possibility of reversal
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

Some embodiments relate to a system that includes a first device which is a wireless power transmitter or mobile device and a power adapter external to the first device. The power adapter is configured to receive a control signal and to control a DC output voltage of the power adapter based upon the control signal. The first device is configured to send the control signal to the power adapter.

Claims

1. A system, comprising:

a first device, the first device being a wireless power transmitter or mobile device; and

a power adapter external to the first device, the power adapter being configured to receive a control signal and to control a DC output voltage of the power adapter based upon the control signal,

wherein the first device is configured to send the control signal to the power adapter.

2. The system of claim 1, wherein the power adapter comprises an AC/DC converter that produces a DC output voltage of the power adapter having a magnitude determined based on the control signal.

3. The system of claim 2, wherein the power adapter is configured to receive an AC line voltage at an input of the power adapter.

4. The system of claim 1, wherein the power adapter comprises a DC/DC converter that produces a DC output voltage of the power adapter having a magnitude determined based on the control signal.

5. The system of claim 1, wherein the first device is configured to send the control signal to the power adapter by modulating an output current of the power adapter.

6. The system of claim 1, wherein the first device is configured to send the control signal to the power adapter by superimposing an AC signal on the DC output voltage of the power adapter.

7. The system of claim 6, wherein the AC signal amplitude or frequency is modulated.

8. The system of claim 1, wherein the first device is configured to send the control signal to the power adapter by a wired link.

9. The system of claim 8, wherein the control signal is an analog signal.

10. The system of claim 8, wherein the control signal is a digital signal.

11. The system of claim 10, wherein the wired link is a single-wire serial bus.

12. The system of claim 10, wherein the wired link is a two-wire serial bus.

13. The system of claim 10, wherein the wired link is a parallel bus having a plurality of wires.

14. The system of claim 1, wherein the first device is configured to send the control signal to the power adapter by a wireless link.

15. The system of claim 1, wherein the first device does not include a DC/DC converter.

16. The system of claim 1, wherein the first device is a wireless power transmitter configured to wirelessly provide power to a wireless power receiver, and wherein the wireless power transmitter is configured to produce the control signal based upon a signal received by the wireless power transmitter from the wireless power receiver.

17. The system of claim 1, wherein the first device is disposed in a first housing and the power adapter is disposed in a second housing separate from the first housing.

18. The system of claim 1, wherein the control signal has a digital value representing a selected DC output voltage of the power adapter.

19. The system of claim 18, wherein the digital value is selected from a voltage identification table used by the power adapter and the first device.

20. The system of claim 19, wherein the voltage identification table comprises a plurality of digital values that can be selected in any order.

21. The system of claim 19, wherein the voltage identification table comprises a plurality of digital values that are selected sequentially.

22. The system of claim 1, wherein the control signal includes a service command that controls an aspect of the power adapter other than the DC output voltage of the power adapter.

23. The system of claim 22, wherein the service command includes one or more of the following:

a command that turns on the power adapter;

a command that turns off the power adapter;

a command that sets a maximum output current of the power adapter; and

a command that executes a test sequence of DC output voltages of the power adapter.

24. A wireless power transmitter, comprising:

an inverter configured to receive an output voltage from a power adapter external to the inverter and to produce an alternating signal to transmit wireless power; and

a controller configured to send a control signal to the power adapter to control the output voltage of the power adapter.

25. The wireless power transmitter of claim 24, wherein the wireless power transmitter is configured to wirelessly provide power to a wireless power receiver, and wherein the wireless power transmitter is configured to produce the control signal based upon a signal received by the wireless power transmitter from the wireless power receiver.

26. The wireless power transmitter of claim 24, wherein the wireless power transmitter is configured to send the control signal to the power adapter by modulating an output current of the power adapter.

27. The wireless power transmitter of claim 24, wherein the wireless power transmitter is configured to send the control signal to the power adapter by superimposing an AC signal on a DC output voltage of the power adapter.

28. The wireless power transmitter of claim 27, the AC signal is modulated by amplitude or frequency modulation.

29. The wireless power transmitter of claim 24, wherein the wireless power transmitter is configured to send the control signal to the power adapter by a wired link.

30. The wireless power transmitter of claim 24, wherein the wireless power transmitter is configured to send the control signal to the power adapter by a wireless link.

31. The wireless power transmitter of claim 24, wherein the wireless power transmitter does not include a DC/DC converter.

32. The wireless power transmitter of claim 24, wherein the control signal has a digital value representing a selected DC output voltage of the power adapter.

33. The wireless power transmitter of claim 32, wherein the digital value is selected from a voltage identification table used by the power adapter and the wireless power transmitter.

34. The wireless power transmitter of claim 33, wherein the voltage identification table comprises a plurality of digital values that can be selected in any order.

35. The wireless power transmitter of claim 33, wherein the voltage identification table comprises a plurality of digital values that are selected sequentially.

36. The wireless power transmitter of claim 24, wherein the control signal includes a service command that controls an aspect of the power adapter other than the output voltage of the power adapter.

37. The wireless power transmitter of claim 36, wherein the service command includes one or more of the following:

a command that turns on the power adapter;

a command that turns off the power adapter;

a command that sets a maximum output current of the power adapter; and

a command that executes a test sequence of DC output voltages of the power adapter.

38. A power adapter for a first device, the first device being a wireless power transmitter or a mobile device, the power adapter comprising:

an AC/DC converter configured to receive an AC voltage and produce a DC output voltage of the power adapter; and

a controller configured to receive a control signal from the first device and control the DC output voltage of the power adapter based on the control signal.

39. The power adapter of claim 38, wherein the AC/DC converter is configured to receive an AC line voltage and produce the DC output voltage using the AC line voltage.

40. The power adapter of claim 38, wherein the controller is configured to receive the control signal over a wired link or a wireless link.

41. A method, comprising:

receiving a control signal from a first device, the first device being a wireless transmitter or mobile device;

converting an AC voltage into a DC voltage based on the control signal; and

powering the first device using the DC voltage.

42. A method, comprising:

sending a control signal to a power adapter to control a DC voltage produced by the power adapter from an AC voltage;

receiving the DC voltage; and

producing an alternating signal using the DC voltage to transmit wireless power.