Vehicular electrical architecture of both wireless power and communication peripherals using MRC

• US 9,780,597 B2
• Filed: 02/25/2015
• Issued: 10/03/2017
• Est. Priority Date: 02/27/2014
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Laifenfeld, Moshe, Riess, Eilon
• Primary Examiner(s): Pacheco, Alexis
• Application Number:
  US14/631,304
• Publication Number:
  US 20150244202A1
• Time in Patent Office: 951 Days
• Field of Search: 320108, 320109, 320104, 320137, 307104, 307 91, 307 101
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• 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 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

A system for providing power signals to peripheral devices on a vehicle using magnetic resonance coupling. The system includes a transmitter circuit having a variable current source, a base coil and a variable capacitor, where the current source and the capacitor are tuned to provide a predetermined AC current to the base coil so as to generate an oscillating magnetic field at a predetermined frequency. The system also includes a receiver circuit for each peripheral device, where each receiver circuit includes a receiver coil and a rechargeable power source. When the base coil is tuned to the receiver coil the power source can be recharged through magnetic resonance coupling to power the device. The transmitter circuit can be on the vehicle or can be separate from the vehicle, such as in a charging pad.

Claims

1. A magnetic resonance coupling (MRC) circuit comprising:

at least one transmitter circuit including a base coil and a variable current source, said variable current source selectively providing a predetermined current to the base coil so as to generate an oscillating magnetic field at a predetermined frequency; and

a plurality of peripheral circuits for a plurality of peripheral devices, each peripheral circuit including a receiver coil and a rechargeable power source, each receiver coil being tuned to a resonant frequency, said transmitter circuit selectively providing the frequency of the oscillating magnetic field to be tuned to one or more of the receiver coils so as to charge the power source in the particular peripheral circuit through magnetic resonance coupling, where each peripheral circuit further includes a variable complex impedance load, wherein a change in the complex impedance load in a peripheral circuit causes a change in the magnetic coupling between the base coil and the receiver coil that causes a change in the voltage across a control load in the transmitter circuit that allows data transfer between the transmitter circuit and the peripheral circuit.

2. The MRC circuit according to claim 1 wherein the transmitter circuit and the plurality of peripheral devices are on a vehicle.

3. The MRC circuit according to claim 2 wherein the base coil encircles all of the peripheral devices.

4. The MRC circuit according to claim 2 wherein the peripheral devices are on the same plane as the base coil.

5. The MRC circuit according to claim 1 wherein the plurality of peripheral devices are on a vehicle and the transmitter circuit is external to the vehicle.

6. The MRC circuit according to claim 5 wherein the transmitter circuit is part of a charging pad for charging a vehicle battery.

7. The MRC circuit according to claim 1 wherein the at least one transmitter circuit is a plurality of transmitter circuits each including a base coil and a variable current source, where all of the transmitter circuits are controlled by a common microcontroller.

8. The MRC circuit according to claim 1 wherein the base coil and each of the receiver coils include a tuning capacitor.

9. The MRC circuit according to claim 1 wherein the peripheral devices are selected from the group consisting of switches, actuators, sensors and lights.

10. A magnetic resonance coupling (MRC) circuit for providing power signals to a plurality of peripheral devices on a vehicle, said MRC circuit comprising:

at least one transmitter circuit on the vehicle and including a controller, a base coil, a variable current source and a tuning capacitor, said variable current source selectively providing a predetermined alternating current to the base coil in combination with the tuning capacitor so as to generate an oscillating magnetic field at a predetermined frequency; and

a plurality of receiver circuits where a separate receiver circuit is provided for each of the plurality of peripheral devices, each receiver circuit including a receiver coil, a tuning capacitor and a rechargeable power source, where each of the receiver circuits is tuned to a different resonant frequency, said controller in the transmitter circuit selectively providing the frequency of the oscillating magnetic field to be tuned to each one of the receiver coils at a different time, so as to charge the power source in the particular receiver circuit through magnetic resonance coupling.

11. The MRC circuit according to claim 10 wherein the base coil encircles all of the peripheral devices.

12. The MRC circuit according to claim 10 wherein the at least one transmitter circuit is a plurality of several transmitter circuits each including a base coil, a variable current source and a tuning capacitor, where all of the transmitter circuits are controlled by a common microcontroller.

13. The MRC circuit according to claim 10 wherein each receiver circuit further includes a variable complex impedance load, wherein a change in the complex impedance load in a receiver circuit causes a change in the magnetic coupling between the base coil and the receiver coil that causes a change in the voltage across a control load in the transmitter circuit that allows data transfer between the transmitter circuit and the receiver circuit.

14. The MRC circuit according to claim 10 wherein the peripheral devices are selected from the group consisting of switches, actuators, sensors and lights.

15. A magnetic resonance coupling (MRC) circuit for providing power signals to a plurality of peripheral devices on a vehicle, said MRC circuit comprising:

at least one transmitter circuit external to the vehicle and including a controller, a base coil, a variable current source and a tuning capacitor, said variable current source selectively providing a predetermined alternating current to the base coil in combination with the tuning capacitor so as to generate an oscillating magnetic field at a predetermined frequency; and

a plurality of receiver circuits where a separate receiver circuit is provided for each of the plurality of peripheral devices, each receiver circuit including a receiver coil, a tuning capacitor and a rechargeable power source, where each of the receiver circuits is tuned to a different resonant frequency, said controller in the transmitter circuit selectively providing the frequency of the oscillating magnetic field to be tuned to each one of the receiver coils at a different time, so as to charge the power source in the particular receiver circuit through magnetic resonance coupling.

16. The MRC circuit according to claim 15 wherein the transmitter circuit is part of a charging pad for charging a vehicle battery.

17. The MRC circuit according to claim 15 wherein the at least one transmitter circuit is a plurality of several transmitter circuits each including a base coil, a variable current source and a tuning capacitor, where all of the transmitter circuits are controlled by a common microcontroller.

18. The MRC circuit according to claim 15 wherein each receiver circuit further includes a variable complex impedance load, wherein a change in the complex impedance load in a receiver circuit causes a change in the magnetic coupling between the base coil and the receiver coil that causes a change in the voltage across a control load in the transmitter circuit that allows data transfer between the transmitter circuit and the receiver circuit.

19. The circuit according to claim 15 wherein the peripheral devices are selected from the group consisting of switches, actuators, sensors and lights.