US 11,894,700 B2 · Dynamic inferred coupling estimation

Abstract

Systems, methods and apparatus for providing a wireless charging device are disclosed. A method for operating the wireless charging device includes transmitting a first pulse through each of a plurality of charging circuits, determining peak voltage at nodes in the plurality of charging circuits, each node coupling a transmitting coil to a capacitor in one charging circuit in the plurality of charging circuits, the peak voltage at each node being responsive to the first pulse and indicative of a coupling coefficient with a receiving coil in a chargeable device, determining that a minimum peak voltage responsive to the first pulse is associated with a first charging circuit in the plurality of charging circuits, and providing a first charging current to the first charging circuit.

Claims16

Dependent claims

A method for operating a wireless charging device, comprising:

transmitting a first pulse through a first power transmitting coil that is coupled to a first capacitor at a first node in a first charging circuit;
determining a first peak voltage, wherein the first peak voltage occurs at the first node in response to the first pulse and is indicative of a coupling coefficient between the first power transmitting coil and a receiving coil in a chargeable device;
transmitting the first pulse through a second power transmitting coil that is coupled to a second capacitor at a second node in a second charging circuit;
determining a second peak voltage, wherein the second peak voltage occurs at the second node in response to the first pulse and is indicative of a coupling coefficient between the second power transmitting coil and the receiving coil in the chargeable device;
determining that amplitude of the first peak voltage is lower than amplitude of the second peak voltage;
and
providing a first charging current to the first charging circuit.

4 more elements

A non-transitory processor-readable storage medium having instructions stored thereon which, when executed by at least one processor of a charging circuit, cause the charging circuit to:

transmit a first pulse through a first power transmitting coil that is coupled to a first capacitor at a first node in a first charging circuit;
determine a first peak voltage, wherein the first peak voltage occurs at the first node in response to the first pulse and is indicative of a coupling coefficient between the first power transmitting coil and a receiving coil in a chargeable device;
transmit the first pulse through a second power transmitting coil that is coupled to a second capacitor at a second node in a second charging circuit;
determine a second peak voltage, wherein the second peak voltage occurs at the second node in response to the first pulse and is indicative of a coupling coefficient between the second power transmitting coil and the receiving coil in the chargeable device;
determine that amplitude of the first peak voltage is lower than amplitude of the second peak voltage;
and
provide a first charging current to the first charging circuit.

4 more elements

Dependencies are inferred from the claim text.

Dynamic inferred coupling estimation

Life of this patent

Dynamic inferred coupling estimation

Life of this patent

Abstract

Claims16