Reconfigurable coupled inductor
First Claim
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1. A reconfigurable coupled inductor for use in a voltage regulator that has a switch controller, the inductor comprising:
- at least two windings of the inductor; and
a plurality of metal rings and a plurality of switches coupled to the plurality of metal rings disposed between the at least two windings, wherein each of the metal rings of the plurality of metal rings is connected to each other forming a respective loop, wherein the metal rings of the plurality of metal rings and switches of the plurality of switches are configured to control, in response to one or more signals from the switch controller, at least one coupling property including a coupling coefficient between the at least two windings of the inductor based on a closed or open state of each of the plurality of switches, wherein a closed switch allows current to flow around a metal ring in a closed loop and an open switch prevents current to flow around a metal ring, andwherein the plurality of metal rings and open or closed state of each of the plurality of switches controls a flux field of the inductor, which controls a coupling property of the inductor.
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Abstract
A reconfigurable coupled inductor is disclosed. In one embodiment, the reconfigurable coupled inductor comprises metal rings and switches coupled to the metal rings to control at least one inductor property (e.g., coupling coefficient) based on a closed (e.g., on) or open state (e.g., off) of each switch.
27 Citations
16 Claims
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1. A reconfigurable coupled inductor for use in a voltage regulator that has a switch controller, the inductor comprising:
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at least two windings of the inductor; and a plurality of metal rings and a plurality of switches coupled to the plurality of metal rings disposed between the at least two windings, wherein each of the metal rings of the plurality of metal rings is connected to each other forming a respective loop, wherein the metal rings of the plurality of metal rings and switches of the plurality of switches are configured to control, in response to one or more signals from the switch controller, at least one coupling property including a coupling coefficient between the at least two windings of the inductor based on a closed or open state of each of the plurality of switches, wherein a closed switch allows current to flow around a metal ring in a closed loop and an open switch prevents current to flow around a metal ring, and wherein the plurality of metal rings and open or closed state of each of the plurality of switches controls a flux field of the inductor, which controls a coupling property of the inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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a switch controller for use in a voltage regulator; a reconfigurable coupled inductor coupled to the switch controller, the inductor comprising; at least two windings of the inductor; and a plurality of metal rings and a plurality of switches coupled to the plurality of metal rings disposed between the at least two windings, wherein each of the metal rings of the plurality of metal rings is connected to each other forming a respective loop and the metal rings and switches are configured to control, in response to one or more signals from the switch controller, at least one coupling property including a coupling coefficient between the at least two windings of the inductor based on a closed or open state of each of the plurality of switches, wherein a closed switch allows current to flow around a metal ring in a closed loop and an open switch prevents current to flow around a metal ring, and wherein the plurality of metal rings and open or closed state of each of the plurality of switches controls a flux field of the inductor, which controls a coupling property of the inductor. - View Dependent Claims (13, 14, 15, 16)
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Specification