ACTIVE ELECTROMAGNETIC INTERFERENCE MITIGATION SYSTEM AND METHOD

• US 20150336463A1
• Filed: 05/21/2014
• Published: 11/26/2015
• Est. Priority Date: 05/21/2014
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (Aptiv PLC)
• Original Assignee: Delphi Technologies, Inc. (Aptiv PLC)
• Inventors: BOYER, RICHARD J., HEFFRON, JOHN F.
• Application Number:
  US14/283,739
• Publication Number:
  US 20150336463A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A system and method to mitigate electromagnetic interference generated by a source resonator of a wireless charging system is presented. The system includes a receiver that configured to receive a wireless charging signal transmitted by the source resonator, a phase shifter in communication with the receiver and configured to generate a canceling signal that is 180° out of phase with the wireless charging signal currently received by the receiver, and a transmitter in communication with the phase shifter and configured to electromagnetically transmit the canceling signal, thereby canceling at least a portion of the wireless charging signal. The canceling signal being at the same frequency and 180° out of phase interferes with the charging signal to reduce or eliminate electromagnetic interference in the vicinity of the vehicle being charged.

Claims

1. A system configured to mitigate electromagnetic interference generated by a source resonator of a wireless charging system, said system comprising:

a receiver configured to receive a wireless charging signal transmitted by the source resonator;

a phase shifter in communication with said receiver and configured to generate a canceling signal that is 180°

out of phase with the wireless charging signal currently received by the receiver; and

a transmitter in communication with the phase shifter and configured to electromagnetically transmit the canceling signal, thereby canceling at least a portion of the wireless charging signal.

2. The system in accordance with claim 1, wherein the system further determines a fundamental frequency of the wireless charging signal and wherein a frequency of the canceling signal is based on the fundamental frequency of the wireless charging signal currently received by the receiver.

3. The system in accordance with claim 1, wherein the transmitter is a dedicated transmitter configured to transmit only the canceling signal.

4. The system in accordance with claim 3, wherein the transmitter is disposed within a vehicle.

5. The system in accordance with claim 3, wherein the transmitter is disposed within the wireless charging system.

6. The system in accordance with claim 1, wherein the transmitter is a transceiver of a remote control system configured to transmit the canceling signal and well as transmit and receive remote control signals.

7. The system in accordance with claim 6, wherein the transmitter is disposed within a vehicle.

8. A system to mitigate electromagnetic interference generated by a source resonator of a wireless charging system, said system comprising:

a receiver receiving a wireless charging signal transmitted by the source resonator;

a phase shifter in communication with said receiver and generating a canceling signal that is 180°

out of phase with the wireless charging signal currently received by the receiver; and

a transmitter in communication with the phase shifter and electromagnetically transmitting the canceling signal, thereby canceling at least a portion of the wireless charging signal.

9. The system in accordance with claim 8, wherein the system further determines a fundamental frequency of the wireless charging signal and wherein a frequency of the canceling signal is based on the fundamental frequency of the wireless charging signal currently received by the receiver.

10. The system in accordance with claim 8, wherein the transmitter is a dedicated transmitter configured to transmit only the canceling signal.

11. The system in accordance with claim 10, wherein the transmitter is disposed within a vehicle.

12. The system in accordance with claim 10, wherein the transmitter is disposed within the wireless charging system.

13. The system in accordance with claim 8, wherein the transmitter is a transceiver of a remote control system configured to transmit the canceling signal and well as transmit and receive remote control signals.

14. The system in accordance with claim 13, wherein the transmitter is disposed within a vehicle.

15. A method to mitigate electromagnetic interference generated by a source resonator of a wireless charging system, said method comprising the steps of:

receiving a wireless charging signal transmitted by the source resonator;

generating a canceling signal that is 180 degrees out of phase with the wireless charging signal that is currently being received; and

electromagnetically transmitting the canceling signal, thereby canceling at least a portion of the wireless charging signal.

16. The method in accordance with claim 15, wherein the method further includes the step of determining a fundamental frequency of the wireless charging signal and wherein the canceling signal is transmitted at a canceling signal frequency that is based on the fundamental frequency of the wireless charging signal that is currently being received.