Systems, methods and apparatus for guidance and alignment between electric vehicles and wireless charging systems
First Claim
1. An apparatus for determining a relative position of a wireless power transmitter from a wireless power receiver, comprising:
- a driver circuit configured to generate a first signal oscillating at a first frequency and a second frequency separated from the first frequency by a first frequency spacing and a second signal oscillating at a third frequency that is separated from the second frequency by a second frequency spacing that is equal to the first frequency spacing;
a first generator coil configured to generate a first alternating magnetic field oscillating at the first frequency and the second frequency when driven by the first signal;
a second generator coil configured to generate a second alternating magnetic field oscillating at the third frequency when driven by the second signal, the first generator coil or the second generator coil also configurable to wirelessly transfer charging power from the wireless power transmitter; and
a processor configured to determine the relative position of the wireless power transmitter based on signals derived from the first and second alternating magnetic fields.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for determining a relative position of a wireless power transmitter from a wireless power receiver is provided. The apparatus comprises a driver circuit configured to generate a first signal and a second signal. At least one of the first signal and the second signal oscillates at two frequencies. The apparatus comprises a first generator coil configured to generate a first alternating magnetic field when driven by the first signal. The first generator coil is also configurable to wirelessly transfer charging power from the wireless power transmitter. The apparatus comprises a second generator coil configured to generate a second alternating magnetic field when driven by the second signal.
17 Citations
22 Claims
-
1. An apparatus for determining a relative position of a wireless power transmitter from a wireless power receiver, comprising:
-
a driver circuit configured to generate a first signal oscillating at a first frequency and a second frequency separated from the first frequency by a first frequency spacing and a second signal oscillating at a third frequency that is separated from the second frequency by a second frequency spacing that is equal to the first frequency spacing; a first generator coil configured to generate a first alternating magnetic field oscillating at the first frequency and the second frequency when driven by the first signal; a second generator coil configured to generate a second alternating magnetic field oscillating at the third frequency when driven by the second signal, the first generator coil or the second generator coil also configurable to wirelessly transfer charging power from the wireless power transmitter; and a processor configured to determine the relative position of the wireless power transmitter based on signals derived from the first and second alternating magnetic fields. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for determining a relative position of a wireless power transmitter from a wireless power receiver, comprising:
-
generating a first signal oscillating at a first frequency and a second frequency separated from the first frequency by a first frequency spacing and a second signal oscillating at a third frequency that is separated from the second frequency by a second frequency spacing that is equal to the first frequency spacing; generating a first alternating magnetic field oscillating at the first frequency and the second frequency by driving a first generator coil with the first signal; generating a second alternating magnetic field by driving a second generator coil with the second signal oscillating at the third frequency, the first generator coil or the second generator coil also configurable to wirelessly transfer charging power from the wireless power transmitter; and determining the relative position of the wireless power transmitter based on signals derived from the first and second alternating magnetic fields. - View Dependent Claims (7, 8, 9, 10)
-
-
11. An apparatus for determining a relative position of a wireless power transmitter from a wireless power receiver, comprising:
-
a plurality of magnetic sense coils, each configured to generate a respective voltage signal under influence of a first alternating magnetic field and a second alternating magnetic field, the first alternating magnetic field oscillating at a first frequency and a second frequency separated from the first frequency by a first frequency spacing and the second alternating magnetic field oscillating at a third frequency that is separated from the second frequency by a second frequency spacing that is equal to the first frequency spacing; and a processor configured to determine the relative position of the wireless power transmitter from the wireless power receiver based on the respective voltage signal from each of the plurality of magnetic sense coils. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A method for determining a relative position of a wireless power transmitter from a wireless power receiver, comprising:
-
generating a respective voltage signal by each of a plurality of magnetic sense coils Under influence of a first alternating magnetic field oscillating at a first frequency and a second frequency separated from the first frequency by a first frequency spacing and a second alternating magnetic field oscillating at a third frequency that is separated from the second frequency by a second frequency spacing that is equal to the first frequency spacing; and determining the relative position of the wireless power transmitter from the wireless power receiver based on the respective voltage signal from each of the plurality of magnetic sense coils. - View Dependent Claims (18, 19, 20, 21, 22)
-
Specification