Multi-mode wireless power receiver control
First Claim
1. A method for controlling power transfer at a wireless power receiver, the method comprising:
- wirelessly coupling power at a power transfer element of the wireless power receiver via a wireless field to generate a voltage and current through the wireless power receiver; and
adjusting a duty cycle of a DC-DC converter and a duty cycle of an AC switching controller to control the voltage and the current through the wireless power receiver.
2 Assignments
0 Petitions
Accused Products
Abstract
In certain aspects, methods and systems for controlling power transfer at a wireless power receiver are disclosed. In certain aspects, a method includes determining a duty cycle of a DC-DC converter of the wireless power receiver. The method further includes determining a duty cycle limit for an AC switching controller based on the determined duty cycle. The method further includes determining an operational duty cycle for the AC switching controller. The method further includes comparing the operational duty cycle to the duty cycle limit. The method further includes adjusting at least one of a desired voltage and current input to the DC-DC converter when the operational duty cycle is greater than the duty cycle limit.
11 Citations
20 Claims
-
1. A method for controlling power transfer at a wireless power receiver, the method comprising:
-
wirelessly coupling power at a power transfer element of the wireless power receiver via a wireless field to generate a voltage and current through the wireless power receiver; and adjusting a duty cycle of a DC-DC converter and a duty cycle of an AC switching controller to control the voltage and the current through the wireless power receiver. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A wireless power receiver comprising:
-
a DC-DC converter; an AC switching controller; and a resonant circuit configured to couple to a wireless power field, wherein an input of the AC switching controller is coupled to an output of the resonant circuit, and wherein an output of the AC switching controller is coupled to an input of the DC-DC converter; a rectifier comprising silicon diodes; and a controller configured to control a clamping angle of the AC switching controller to have a minimum value above zero. - View Dependent Claims (8, 9, 10)
-
-
11. A wireless power receiver comprising:
-
a DC-DC converter comprising one or more first switches; an AC switching controller comprising one or more second switches; a controller configured to control a first duty cycle of the one or more first switches and a second duty cycle of the one or more second switches, wherein the controller is configured to control the second duty cycle based on the first duty cycle; and a resonant circuit configured to couple to a wireless power field, wherein an input of the AC switching controller is coupled to an output of the resonant circuit, and wherein an output of the AC switching controller is coupled to an input of the DC-DC converter. - View Dependent Claims (12, 19)
-
-
13. A wireless power receiver comprising:
-
a DC-DC converter comprising one or more first switches; an AC switching controller comprising one or more second switches; a controller configured to control a first duty cycle of the one or more first switches and a second duty cycle of the one or more second switches; a resonant circuit configured to couple to a wireless power field, wherein an input of the AC switching controller is coupled to an output of the resonant circuit, and wherein an output of the AC switching controller is coupled to an input of the DC-DC converter; and a load, wherein the duty cycle of the DC-DC converter is adjusted based on a voltage or a current of the load powered by the wireless power receiver. - View Dependent Claims (20)
-
-
14. A wireless power receiver comprising:
-
a DC-DC converter comprising one or more first switches; an AC switching controller comprising one or more second switches; a resonant circuit configured to couple to a wireless power field, wherein an input of the AC switching controller is coupled to an output of the resonant circuit, and wherein an output of the AC switching controller is coupled to an input of the DC-DC converter; and a controller configured to; control a first duty cycle of the one or more first switches and a second duty cycle of the one or more second switches; determine the first duty cycle based on one of a voltage and a current output to a load of the wireless power receiver and one of a desired voltage and current input to the DC-DC converter; determine a limit for the second duty cycle based on the determined first duty cycle and the one of the voltage and the current output to the load; determine an operational value for the second duty cycle based on the other one of the desired voltage and current input to the DC-DC converter and an actual one of a current and voltage output from the AC switching controller; compare the operational value to the limit; and adjust at least one of the desired voltage and current input to the DC-DC converter when the operational value is greater than the limit.
-
-
15. A wireless power receiver comprising:
-
means for determining a duty cycle of a DC-DC converter of the wireless power receiver based on one of a voltage and a current output to a load of the wireless power receiver and one of a desired voltage and current input to the DC-DC converter; means for determining a duty cycle limit for an AC switching controller based on the determined duty cycle and the one of the voltage and the current output to the load; means for determining an operational duty cycle for the AC switching controller based on the other one of the desired voltage and current input to the DC-DC converter and an actual one of a current and voltage output from the AC switching controller; means for comparing the operational duty cycle to the duty cycle limit; and means for adjusting at least one of the desired voltage and current input to the DC-DC converter when the operational duty cycle is greater than the duty cycle limit. - View Dependent Claims (16, 17, 18)
-
Specification