Wireless power supply system, power transmitting apparatus and power receiving apparatus

• US 10,027,169 B2
• Filed: 01/28/2016
• Issued: 07/17/2018
• Est. Priority Date: 03/23/2015
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Masumoto, Gaku, Endo, Takefumi
• Primary Examiner(s): DEBERADINIS, ROBERT L
• Application Number:
  US15/008,565
• Publication Number:
  US 20160285311A1
• Time in Patent Office: 901 Days
• 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

Abstract

Provided is a wireless power supply system including a power transmitting apparatus and a power receiving apparatus. The power transmitting apparatus includes a power transmitting coil that transmits AC power to the power receiving apparatus, a first modulation/demodulation unit that performs a modulation/demodulation process on the AC power of the power transmitting coil, a first transreceiver unit that transmits application data to the power receiving apparatus via the first modulation/demodulation unit. The power receiving apparatus includes a power receiving coil that receives the AC power from the power transmitting apparatus, a second modulation/demodulation unit that performs a modulation/demodulation process on the AC power of the power receiving coil, a second transreceiver unit that receives the application data from the power transmitting apparatus via the second modulation/demodulation unit, and an application processing unit that executes an application process based on the received application data.

Claims

1. A wireless power supply system comprising:

a power transmitting apparatus; and

a power receiving apparatus, wherein

the power transmitting apparatus comprises;

a power transmitting coil that transmits AC power to the power receiving apparatus;

a first modulation/demodulation unit that performs a modulation/demodulation process on the AC power of the power transmitting coil; and

a first transreceiver unit that performs two-way communication with the power receiving apparatus via the first modulation/demodulation unit and transmits application data to the power receiving apparatus, and

the power receiving apparatus comprises;

a power receiving coil that receives the AC power from the power transmitting apparatus;

a second modulation/demodulation unit that performs a modulation/demodulation process on the AC power of the power receiving coil;

a second transreceiver unit that performs two-way communication with the power transmitting apparatus via the second modulation/demodulation unit and receives the application data from the power transmitting apparatus; and

an application processing unit that executes an application process based on the received application data, wherein

the power receiving apparatus is configured to perform an operation of achieving functions of an application, performed in communication from the power transmitting apparatus to the power receiving apparatus, in a case in which the power receiving apparatus comprises no physical switches and no connectors necessary for charging the power receiving apparatus.

2. The wireless power supply system according to claim 1, wherein

the first modulation/demodulation unit comprises:

a first modulation unit that amplitude modulates the AC power according to first transmission data, the first transmission data being transmitted to the power receiving apparatus; and

a first demodulation unit that demodulates first reception data according to the AC power that has been load modulated by the power receiving apparatus, the first reception data being received from the power receiving apparatus, and

the second modulation/demodulation unit comprises;

a second modulation unit that load modulates the AC power according to second transmission data, the second transmission data being transmitted to the power transmitting apparatus; and

a second demodulation unit that demodulates second reception data according to the AC power that has been amplitude modulated by the power transmitting apparatus, the second reception data being received from the power transmitting apparatus.

3. The wireless power supply system according to claim 2, wherein

the first modulation unit comprises:

a first transmission packet generating unit that generates a transmission packet of a predetermined format, the transmission packet including the first transmission data; and

a pulse train generating unit that generates a pulse train according to the generated transmission packet and outputs the generated pulse train to the power transmitting coil,

the first demodulation unit comprises;

a first conversion unit that converts an amplitude of the load modulated AC power into a digital signal; and

a first reception packet analyzing unit that analyzes a reception packet of the predetermined format based on the digital signal, the reception packet including the second reception data,

the second modulation unit comprises;

a second transmission packet generating unit that generates a transmission packet of the predetermined format, the transmission packet including the second transmission data; and

a switch that switches a load of the power receiving coil according to the generated transmission packet, and

the second demodulation unit comprises;

a second conversion unit that converts an amplitude of the amplitude modulated AC power into a digital signal; and

a second reception packet analyzing unit that analyzes a reception packet of the predetermined format based on the digital signal, the reception packet including the second reception data.

4. The wireless power supply system according to claim 2, wherein

the power transmitting apparatus includes a first register that stores the first transmission data, the first reception data, a first transmission trigger flag, and a first reception notification flag,

the first transreceiver unit sets the first transmission trigger flag to ON after the first transmission data is stored in the first register,

when the first transmission trigger flag becomes ON, the first modulation unit starts transmitting the first transmission data that is stored in the first register, and after the transmission of the first transmission data is completed, the first modulation unit sets the first transmission trigger flag to OFF,

the first demodulation unit sets the first reception notification flag to ON after the first reception data is stored in the first register, and

when the first reception notification flag becomes ON, the first transreceiver unit starts obtaining the first reception data that is stored in the first register, and after the first transreceiver unit has completed obtaining the first reception data, the first transreceiver unit sets the first reception notification flag to OFF.

5. The wireless power supply system according to claim 2, wherein

the power receiving apparatus includes a second register that stores the second transmission data, the second reception data, a second transmission trigger flag, and a second reception notification flag,

the second transreceiver unit sets the second transmission trigger flag to ON after the second transmission data is stored in the second register,

when the second transmission trigger flag becomes ON, the second modulation unit starts transmitting the second transmission data that is stored in the second register, and after the transmission of the second transmission data is completed, the second modulation unit sets the second transmission trigger flag to OFF,

the second demodulation unit sets the second reception notification flag to ON after the second reception data is stored in the second register, and

when the second reception notification flag becomes ON, the second transreceiver unit starts obtaining the second reception data that is stored in the second register, and after the second transreceiver unit has completed obtaining the second reception data, the second transreceiver unit sets the second reception notification flag to OFF.

6. The wireless power supply system according to claim 1, wherein

the application data is initial setting data for performing initial setting on the application processing unit.

7. The wireless power supply system according to claim 6, wherein

the application processing unit is a Bluetooth (registered trademark) communication unit that performs Bluetooth communication, and

the application data is pairing setting data that sets the Bluetooth communication unit in a pairing mode for a pairing process of Bluetooth.

8. The wireless power supply system according to claim 7, wherein

the second transreceiver unit transmits pairing response data to the power transmitting apparatus after the second transreceiver unit receives the pairing setting data.

9. The wireless power supply system according to claim 8, wherein

the pairing response data includes a PIN code that is set in the Bluetooth communication unit, and

the first transreceiver unit outputs the PIN code included in the pairing response data that has been received from the power receiving apparatus.

10. The wireless power supply system according to claim 8, wherein

the pairing response data includes a numeric code that is set in the Bluetooth communication unit, and

the first transreceiver unit outputs the numeric code included in the pairing response data received from the power receiving apparatus.

11. The wireless power supply system according to claim 6, wherein

the application processing unit is a wireless LAN communication unit that performs wireless LAN communication, and

the application data is a security key to be set in the wireless LAN communication unit.

12. The wireless power supply system according to claim 1, wherein

the application data is switching data that powers ON/OFF the application processing unit.

13. The power supply system according to claim 1, wherein

the application data is an application program to be executed by the application processing unit.

14. The wireless power supply system according to claim 1, wherein

the second transreceiver unit transmits data regarding a result of executing the application process by the application processing unit to the power transmitting apparatus.

15. A power receiving apparatus comprising:

a power receiving coil that receives AC power from a power transmitting apparatus;

a modulation/demodulation unit that performs a modulation/demodulation process on the AC power of the power receiving coil; and

an application processing unit that executes an application process based on the received application data, wherein

the power receiving apparatus is configured to perform an operation of achieving functions of the application process, performed in communication from the power transmitting apparatus to the power receiving apparatus, in a case in which the power receiving apparatus comprises no physical switches and no connectors necessary for charging the power receiving apparatus.