Apparatuses and related methods for a wireless power receiver using coupled inductors
First Claim
1. A wireless power receiver, comprising:
- one or more receive coils configured to generate an AC power signal responsive to a wireless power signal;
two or more inductors configured with tightly coupled windings that share a common leakage inductance;
two or more switching circuits, each switching circuit operably coupled to a corresponding one of the two or more inductors; and
control logic configured to operate switches of the two or more switching circuits such that each of the two or more switching circuits and its corresponding one of the two or more inductors are operated to shift between an energy storage mode for one or more phases of a switching period and an energy transfer mode for other phases of the switching period and the phases combine to comprise an entirety of the switching period;
wherein a pattern of the one or more energy storage mode phases and the one or more energy transfer mode phases for each of the two or more switching circuits and its corresponding one of the two or more inductors during the switching period is different from patterns of the one or more energy storage mode phases and the one or more energy transfer mode phases of others of the two or more switching circuits and their one of the two or more inductors during the switching period.
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Accused Products
Abstract
A wireless power enabled apparatus includes a wireless power receiver. The wireless power receiver includes one or more receive coils configured to generate an AC power signal responsive to a wireless power signal. The wireless power receiver also includes two or more inductors configured with tightly coupled windings that share a common leakage inductance. Switching circuits are included such that each switching circuit is operably coupled to a corresponding one of the inductors. Control logic is configured to operate switches of the switching circuits such that each of the switching circuits and its corresponding two or more inductors are operated to shift between an energy storage mode for one or more phases of a switching period and an energy transfer mode for other phases of the switching period and the phases combine to comprise an entirety of the switching period.
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Citations
23 Claims
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1. A wireless power receiver, comprising:
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one or more receive coils configured to generate an AC power signal responsive to a wireless power signal; two or more inductors configured with tightly coupled windings that share a common leakage inductance; two or more switching circuits, each switching circuit operably coupled to a corresponding one of the two or more inductors; and control logic configured to operate switches of the two or more switching circuits such that each of the two or more switching circuits and its corresponding one of the two or more inductors are operated to shift between an energy storage mode for one or more phases of a switching period and an energy transfer mode for other phases of the switching period and the phases combine to comprise an entirety of the switching period; wherein a pattern of the one or more energy storage mode phases and the one or more energy transfer mode phases for each of the two or more switching circuits and its corresponding one of the two or more inductors during the switching period is different from patterns of the one or more energy storage mode phases and the one or more energy transfer mode phases of others of the two or more switching circuits and their one of the two or more inductors during the switching period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless power enabled apparatus, comprising:
a wireless power receiver, including; one or more receive coils configured to generate an AC power signal responsive to a wireless power signal; two or more switched inductor circuits operably coupled to the one or more receive coils, each switched inductor circuit comprising; an inductor; and two or more switches operably coupled to the inductor; and control logic configured to operate the two or more switches such that the two or more switches and the inductor are operated to shift between an energy storage mode for one or more phases of a switching period and an energy transfer mode for other phases of the switching period and the phases combine to comprise an entirety of the switching period; wherein the inductors from each of the two or more switched inductor circuits include tightly coupled windings that share a common leakage inductance; wherein a pattern of the one or more energy storage mode phases and the one or more energy transfer mode phases for each of the two or more switching circuits and its corresponding one of the two or more inductors during the switching period is different from patterns of the one or more energy storage mode phases and the one or more energy transfer mode phases of others of the two or more switching circuits and their one of the two or more inductors during the switching period. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a receiver side of a wireless power transfer system, the method comprising:
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generating an AC power signal responsive to a wireless power signal exciting one or more receive coils at a given frequency; and operating each of two or more switched inductor circuits operably coupled to the one or more receive coils to shift between an energy storage mode for one or more phases of a switching period and an energy transfer mode for other phases of the switching period and the phases combine to comprise an entirety of the switching period; wherein the inductors from each of the two or more switched inductor circuits include tightly coupled windings that share a common leakage inductance; wherein a pattern of the one or more energy storage mode phases and the one or more energy transfer mode phases for each of the two or more switching circuits and its corresponding one of the two or more inductors during the switching period is different from patterns of the one or more energy storage mode phases and the one or more energy transfer mode phases of others of the two or more switching circuits and their one of the two or more inductors during the switching period. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification