Systems and methods for electric vehicle induction coil alignment
First Claim
1. A method of receiving wireless power, comprising:
- receiving, at a first coil, a wireless power transmission from a base system induction coil at a level sufficient to charge an electric device;
detecting periodic step changes in an operating frequency of the wireless power transmission, between a first frequency and a second frequency; and
determining a phase of a base system induction coil signal based on timing of the periodic steps.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods in accordance with particular embodiments provide for alignment of an electric vehicle induction coil with a base system induction coil through a determination of the phase of a base system induction coil current signal. In certain embodiments, an electric vehicle induction coil that receives a transmission signal can be determined to be in greater alignment with a base system induction coil that transmits the transmission signal as the phases of the current signals at the base system induction coil and the electric vehicle induction coil converge. One embodiment includes a method of receiving wireless power, including detecting a transmission signal in a wireless power transmission, the transmission signal comprising periodic variations between a first frequency and a second frequency. The method further includes determining a phase of a base system induction coil signal based on the detected transmission signal.
-
Citations
29 Claims
-
1. A method of receiving wireless power, comprising:
-
receiving, at a first coil, a wireless power transmission from a base system induction coil at a level sufficient to charge an electric device; detecting periodic step changes in an operating frequency of the wireless power transmission, between a first frequency and a second frequency; and determining a phase of a base system induction coil signal based on timing of the periodic steps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A wireless power receiver, comprising:
-
an electric vehicle induction coil configured to receive a wireless power transmission for charging an electric vehicle; a detector configured to detect periodic step changes in an operating frequency of the wireless power transmission, between a first frequency and a second frequency; and an electric vehicle controller configured to determine a phase of a base system induction coil signal based on timing of the periodic steps. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A method of transmitting wireless power, comprising:
-
generating a wireless power transmission signal, for transmission by a base system induction coil to a wireless power receiver, by periodically stepping an operating frequency of the wireless power transmission between a first frequency and a second frequency to indicate a phase of the base system induction coil; and transmitting, at the base system induction coil, the wireless power transmission signal. - View Dependent Claims (25, 26)
-
-
27. A wireless power transmitter, comprising:
-
a base system transmit circuit configured to generate a wireless power transmission signal, for transmission by a base system induction coil to a wireless power receiver, by periodically stepping an operating frequency of the wireless power transmission between a first frequency and a second frequency to indicate a phase of the base system induction coil; and a base system induction coil configured to transmit the wireless power transmission signal. - View Dependent Claims (28, 29)
-
Specification