Granted Patent B2

US 12,633,778 · App. 18/952,380 · Granted May 19, 2026

Inventors: Chun-Kil Jung (Seoul, KR); Hak Do Kim (Suwon-si, KR); Sang Youn Noh (Suwon-si, KR)

Assignee: GE Hybrid Technologies, LLC

H02J50/12H02J7/94H02J50/10H02J50/80H03D1/10

Abstract

Claims (48)

1 . A method by a wireless power receiver, the method comprising:

receiving a wireless power signal from a wireless power transmitter;

selecting one of a plurality of modulators based on a power level of the wireless power signal, wherein the plurality of modulators includes at least a first modulator and a second modulator that are associated with different power levels; and

communicating with the wireless power transmitter using the selected one of the plurality of modulators.

2 . The method of claim 1 , wherein the first modulator is coupled to a DC terminal between a rectifier and a regulator of the wireless power receiver, and wherein the second modulator is coupled to an AC terminal between a secondary core and the rectifier.

3 . The method of claim 1 , wherein the first modulator includes at least one transistor and a resistor, and wherein the second modulator includes at least one capacitor.

4 . The method of claim 1 , further comprising:

selecting the first modulator when the wireless power signal is a first power level; and

selecting the second modulator when the wireless power signal is a second power level.

5 . The method of claim 1 , wherein communicating includes:

communicating using the first modulator when the power level is at or above a control point, and

communicating using the second modulator when the power level is below the control point.

6 . The method of claim 5 , wherein the control point is a predetermined value representing a threshold for selecting the first modulator.

7 . The method of claim 1 ,

wherein the first modulator reduces distortion that would otherwise occur as a result of using the second modulator with the wireless power signal based on a frequency of the wireless power signal.

8 . The method of claim 1 , wherein communicating with the wireless power transmitter includes modulating an amplitude of the wireless power signal using the selected one of the plurality of modulators.

9 . The method of claim 1 , further comprising:

controlling a configurable gate bias of the first modulator based on the power level of the wireless power signal.

10 . A wireless power receiver comprising:

a secondary core configured to receive a wireless power signal from a wireless power transmitter;

a plurality of modulators including at least a first modulator and a second modulator that are associated with different power levels; and

a controller configured to:

select one of the plurality of modulators based on a power level of the wireless power signal, and

communicate with the wireless power transmitter using the selected one of the plurality of modulators.

11 . The wireless power receiver of claim 10 , wherein:

the first modulator is coupled to a DC terminal between a rectifier and a regulator of the wireless power receiver, and

the second modulator is coupled to an AC terminal between a secondary core and the rectifier.

12 . The wireless power receiver of claim 10 , wherein the first modulator includes at least one transistor and a resistor, and wherein the second modulator includes at least one capacitor.

13 . The wireless power receiver of claim 10 , wherein the controller is configured to:

select the first modulator when the wireless power signal is a first power level; and

select the second modulator when the wireless power signal is a second power level.

14 . The wireless power receiver of claim 10 , wherein the controller is configured to:

communicate using the first modulator when the power level is at or above a control point, and

communicate using the second modulator when the power level is below the control point.

15 . The wireless power receiver of claim 14 , wherein the control point is a predetermined value representing a threshold for selecting the first modulator.

16 . The wireless power receiver of claim 10 ,

wherein the first modulator reduces distortion that would otherwise occur as a result of using the second modulator with the wireless power signal based on a frequency of the wireless power signal.

17 . A system, comprising:

means for receiving a wireless power signal from a wireless power transmitter;

means for selecting one of a plurality of modulators based on a power level of the wireless power signal, wherein the plurality of modulators includes at least a first modulator and a second modulator that are associated with different power levels; and

means for communicating with the wireless power transmitter using the selected one of the plurality of modulators.

18 . The system of claim 17 , wherein the first modulator is coupled to a DC terminal between a rectifier and a regulator, and wherein the second modulator is coupled to an AC terminal between a secondary core and the rectifier.

19 . The system of claim 17 , further comprising:

means for selecting the first modulator when the wireless power signal is a first power level; and

means for selecting the second modulator when the wireless power signal is a second power level.

20 . The system of claim 17 , wherein means for communicating includes:

means for communicating using the first modulator when the power level is at or above a control point, and

means for communicating using the second modulator when the power level is below the control point.

Assignments (4)

Continuity (6)

References Cited (70)