Multi-protocol ubiquitous wireless power transmitter

• US 9,680,337 B2
• Filed: 01/16/2016
• Issued: 06/13/2017
• Est. Priority Date: 09/07/2012
• Status: Active Grant

• Current Assignee: WiPQTUS Inc.
• Original Assignee: WiPQTUS Inc.
• Inventors: Sankar, Ganapathy
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Barnett, Joel
• Application Number:
  US14/997,528
• Publication Number:
  US 20160164345A1
• Time in Patent Office: 514 Days
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A multi-mode multi-coupling multi-protocol wireless power transmitter (WPT) and its embodiments transmit power to a wireless power receiver (WPR) in a power transfer mode (PTM) and a wireless power protocol (WPP) of the WPR. A first circuit of the WPT includes inductors or capacitors emanating power via a magnetic field or electric field PTM respectively. The WPT sequentially parses a test condition to identify a PTM, a power coupling linkage (PCL) between the WPT and the WPR, and a WPP of the WPR. The WPT identifies a match if the PTM of the first circuit and the WPP of the switch network, the variable matching circuit, a modulator/demodulator block or an out-of-band communication block, and a control logic circuit of the WPT match the PTM and the WPP of the WPR to transmit power to the WPR based on the match.

Claims

1. A multi-protocol wireless power transmitter, comprising:

a switch network configured to receive power from a power source;

a variable matching circuit connected to said switch network;

a first circuit connected to said variable matching circuit, said first circuit comprising either one or more inductors to emanate power via a magnetic field or one or more capacitors to emanate power via an electric field, wherein said first circuit transmits said power to said wireless power receiver in a single power transfer mode comprising one of a magnetic field power transfer mode and an electric field power transfer mode;

a modulator/demodulator block configured to transmit and receive messages to and from said wireless power receiver in one of a plurality of wireless power protocols;

a control logic circuit and an ADC block,

said multi-protocol wireless power transmitter, on detection of presence of said wireless power receiver in a vicinity, configured to sequentially parse one of a plurality of test conditions to identify said wireless power protocol of said wireless power receiver, wherein each of said test conditions comprises instructions to reconfigure a circuit configuration of said multi-protocol wireless power transmitter to transmit said power in said single power transfer mode and to transmit said messages and interpret said received messages in said one of said wireless power protocols, wherein said reconfiguration of said circuit configuration of said multi-protocol wireless power transmitter based on said instructions in one of said sequentially parsed test conditions comprises;

reconfiguring one or more of said switch network, said variable matching circuit, said modulator/demodulator block and said control logic circuit to adhere to a plurality of aspects of said one of said wireless power protocols;

said multi-protocol wireless power transmitter configured to identify a match if said one of said wireless power protocols of said multi-protocol wireless power transmitter match said one of said wireless power protocols of said wireless power receiver; and

said multi-protocol wireless power transmitter configured to transmit said power in said single power transfer mode and to transmit said messages and interpret said received messages to and from said wireless power receiver in said one of said wireless power protocols of said wireless power receiver based on said identified match.

2. The multi-protocol wireless power transmitter of claim 1 further comprising an out-of-band communication block that is configured to transmit and receive messages to and from said wireless power receiver in one of a plurality of said wireless power protocols adhering to a plurality of aspects of said wireless power protocol, said out-of-band communication block used as an alternative to the modulator/demodulator block to transmit and receive messages to and from said wireless power receiver.

3. The multi-protocol wireless power transmitter of claim 1, configured to be one of extendably positioned in, flexibly withdrawn from, non-movably encased into, and plugged into one of a portable electronic device and a non-portable electronic device, for transmitting said power to one or more said wireless power receivers, one or more said wireless power receivers being positioned at one or more of a plurality of locations atop, near, and around said multi-protocol wireless power transmitter.

4. The multi-protocol wireless power transmitter of claim 1, configured to be one of a peripheral accessory that draws power from one of a portable electronic device and a non-portable electronic device and a subsystem integrated into a standalone device that draws power from a wall wart for transmitting said power to one or more said wireless power receivers, one or more said wireless power receivers being positioned at one or more of a plurality of locations atop, near, and around said multi-protocol wireless power transmitter.

5. The multi-protocol wireless power transmitter of claim 2, is one of extendably positioned in, flexibly withdrawn from, non-movably encased into, and plugged into one of a portable electronic device and a non-portable electronic device, for transmitting said power to one or more said wireless power receivers, one or more said wireless power receivers being positioned at one or more of a plurality of locations atop, near, and around said multi-protocol wireless power transmitter.

6. The multi-protocol wireless power transmitter of claim 2, is one of a peripheral accessory that draws power from one of a portable electronic device and a non-portable electronic device and a subsystem integrated into a standalone device that draws power from a wall wart for transmitting said power to one or more said wireless power receivers, one or more said wireless power receivers being positioned at one or more of a plurality of locations atop, near, and around said multi-protocol wireless power transmitter.

7. The multi-protocol wireless power transmitter of claim 1, wherein power coupling linkage between said multi-protocol wireless power transmitter and said wireless power receiver is identified based on said received message from said wireless power receiver.

8. The multi-protocol wireless power transmitter of claim 1, wherein power coupling linkage between said multi-protocol wireless power transmitter and said wireless power receiver is identified based on one or multiple of a voltage, a current and a phase angle between a current and a voltage in one or multiple of said first circuit, said variable matching circuit and said switch network of said multi-protocol wireless power transmitter.

9. The multi-protocol wireless power transmitter of claim 1, configured to tune transmission of said power to said wireless power receiver based on identified power coupling linkage between said multi-protocol wireless power transmitter and said wireless power receiver by one or multiple of signaling its said power source to increase the voltage and effectively the power provided by said power source to said multi-protocol wireless power transmitter, reconfiguring the inverter topology of said switch network of the said multi-protocol wireless power transmitter, reconfiguring said first circuit of the said multi-protocol wireless power transmitter to change the reactive impedance seen by said switch network when looking into said variable matching circuit of the said multi-protocol wireless power transmitter and reconfiguring said variable matching circuit of the said multi-protocol wireless power transmitter to change the reactive impedance seen by said switch network when looking into said variable matching circuit of the said multi-protocol wireless power transmitter.

10. The multi-protocol wireless power transmitter of claim 1, configured to tune transmission of said power to said wireless power receiver based on identified power coupling linkage between said multi-protocol wireless power transmitter and said wireless power receiver by reconfiguring one or both of frequency and duty cycle of the PWM signal supplied by said control logic circuit to said switch network of the said multi-protocol wireless power transmitter.

11. A method for transmitting power from a wireless power transmitter to a wireless power receiver in a power transfer mode and a wireless power protocol of said wireless power receiver, said method comprising:

providing said wireless power transmitter comprising;

a switch network configured to receive power from a power source;

a variable matching circuit connected to said switch network;

a first circuit connected to said variable matching circuit, said first circuit comprising either one or more inductors to emanate power via a magnetic field or one or more capacitors to emanate power via an electric field, wherein said first circuit transmits said power to said wireless power receiver in a single power transfer mode comprising one of a magnetic field power transfer mode and an electric field power transfer mode;

a modulator/demodulator block configured to transmit and receive messages to and from said wireless power receiver in one of a plurality of wireless power protocols; and

a control logic circuit and an ADC block,

detecting a presence of said wireless power receiver in a vicinity of wireless power transmitter by said wireless power transmitter;

sequentially parsing one of a plurality of tests conditions to identify said wireless power protocols of said wireless power receiver, wherein each of said test conditions comprises instructions to reconfigure a circuit configuration of said wireless power transmitter to transmit said power in said power transfer mode and to transmit said messages and interpret said received messages in one of said wireless power protocols, wherein said reconfiguration of said circuit configuration of said wireless power transmitter based on said instructions in one of said sequentially parsed test conditions comprises;

reconfiguring one or more of said switch network, said variable matching circuit, said modulator/demodulator block and said control logic circuit to adhere to a plurality of aspects of said one of said wireless power protocols;

identifying a match if one of said wireless power protocols of said multi-protocol wireless power transmitter match said one of said wireless power protocols of said wireless power receiver;

transmitting said power in said power transfer mode from said wireless power transmitter to said wireless power receiver; and

transmitting said messages and interpreting said received messages to and from said wireless power receiver in said one of said wireless power protocols of said wireless power receiver based on said identified match.

12. The method of claim 11, wherein said wireless power transmitter further comprising an out-of-band communication block, said wireless power transmitter configuring said out-of-band communication block to transmit and receive messages to and from said wireless power receiver in one of a plurality of said wireless power protocols adhering to a plurality of aspects of said wireless power protocol, said wireless power transmitter using said out-of-band communication block as an alternative to the modulator/demodulator block to transmit and receive messages to and from said wireless power receiver.

13. The method of claim 11, wherein said control logic circuit identifies said power transfer mode and said wireless power protocol of said wireless power receiver via messages received from said wireless power receiver.

14. The method of claim 11, wherein power coupling linkage between said wireless power transmitter and said wireless power receiver is identified based on one or multiple of a voltage, a current and a phase angle between the voltage and current in one or multiple of said first circuit, said variable matching circuit and said switch network of said wireless power transmitter.

15. The method of claim 11, wherein power coupling linkage between said wireless power transmitter and said wireless power receiver is identified based on said received messages from said wireless power receiver.

16. The method of claim 11, wherein said wireless power transmitter tuning transmission of said power to said wireless power receiver based on identified power coupling linkage between said wireless power transmitter and said wireless power receiver by one or multiple of signaling its said power source to increase the voltage and effectively the power provided by said power source to said wireless power transmitter, reconfiguring the inverter topology of said switch network in said wireless power transmitter, reconfiguring said variable matching circuit to change the reactive impedance seen by said switch network when looking into said variable matching circuit in said wireless power transmitter and reconfiguring said first circuit to change the reactive impedance seen by said switch network when looking into said variable matching circuit in said wireless power transmitter.

17. The method of claim 11, wherein said wireless power transmitter tuning transmission of said power to said wireless power receiver based on identified power coupling linkage between said wireless power transmitter and said wireless power receiver by reconfiguring one or both of frequency and duty cycle of the PWM signal supplied by said control logic circuit to said switch network.