Coil design for wireless power transfer
AssigneeIntegrated Device Technology, Inc.
InventorsGustavo J. MEHAS, Tao QI
Life of this patent
Estimating the term…
Abstract
In some embodiments, a transmit coil configuration is provided. A coil configuration for a wireless transmitter according to some embodiments can include a plurality of turns coupled between a first tap coupled to an innermost turn and a second tap coupled to an outermost turn; and at least one adjustment tap coupled to at least one turn of the transmitter coil between the innermost turn and the outermost turn. The transmission coil can include an MST coil coupled to the second tap of the transmission coil. In some embodiments, the MST coil can include a plurality of turns arranged in one of a circle, an oval, an egg shape, or a square shape.
Claims16
A coil configuration for a wireless transmitter, comprising:
- a plurality of turns coupled between a first tap coupled to an innermost turn and a second tap coupled to an outermost turn;
- and
- at least one adjustment tap coupled to at least one turn of the transmitter coil between the innermost turn and the outermost turn.
A wireless power transmission system, comprising:
- a controller;
- a transmission coil, the transmission coil comprising a plurality of turns with an innermost turn coupled to a first tap and an outermost turn coupled to a second tap, and at least one adjustment tap coupled to at least one turn of the transmitter coil between the innermost turn and the outermost turn, the second tap coupled to a first output node of the controller and the first tap coupled a second output node of the controller;
- at least one switch coupled controlled by the controller and coupled between the second tap and the at least one adjustment tap,
- wherein the transmission controller adjusts the at least one switch to control an active area of the transmission coil.
A method wireless transmission of power, comprising:
- driving a transmission coil comprising a plurality of turns with an innermost turn coupled to a first tap and an outermost turn coupled to a second tap, and at least one adjustment tap coupled to at least one turn of the transmitter coil between the innermost turn and the outermost turn;
- and
- adjusting an area of the transmission coil using the at least one adjustment tap according to an area of a receiver coil.
Dependencies are inferred from the claim text.