ELECTRICALLY TUNABLE INDUCTOR
First Claim
1. An electrically tunable inductor with an equivalent inductance, comprising:
- a main winding configured to wirelessly transfer power;
a tuning winding magnetically coupled to the main winding, the current through the tuning winding being controlled to adjust the equivalent inductance of the electrically tunable inductor.
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Accused Products
Abstract
An electrically tunable inductor with an equivalent inductance includes a main winding and a tuning winding magnetically coupled to the main winding. The current through the tuning winding is controlled to adjust the equivalent inductance of the electrically tunable inductor. A device may include an electrically tunable inductor. A system may include multiple devices, one or more of the devices including an electrically tunable inductor. A tuning controller within the system may control the current in tuning windings of one or more of the multiple devices in the system. When an electrically tunable inductor is part of a resonant circuit, the resonant frequency may be controlled by adjusting the equivalent inductance of the electrically tunable inductor through controlling the current in the tuning winding. Controlling the current in the tuning winding includes one or more of controlling the peak, direction, frequency, duty cycle, or phase of the current.
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Citations
23 Claims
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1. An electrically tunable inductor with an equivalent inductance, comprising:
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a main winding configured to wirelessly transfer power; a tuning winding magnetically coupled to the main winding, the current through the tuning winding being controlled to adjust the equivalent inductance of the electrically tunable inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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a power transfer coil configured for wireless power transfer; a tuning winding magnetically coupled to the power transfer coil, the power transfer coil when coupled with the tuning winding having an equivalent inductance; and a tuning controller controlling the current through the tuning winding, thereby controlling the equivalent inductance. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system, comprising:
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a first device including a power transfer coil configured for wireless power transfer; and a tuning winding magnetically coupled to the power transfer coil, the power transfer coil when coupled with the tuning winding having an equivalent inductance; and a second device including a tuning controller controlling current through the tuning winding, thereby controlling the equivalent inductance. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification