Rectification and Regulation Circuit for a Wireless Power Receiver
First Claim
1. A rectification and regulation circuit for a wireless power receiver, the rectification and regulation circuit comprising:
- a coil for magnetically coupling to a primary coil of a power transmitter;
a full-wave rectifier separate from the power transmitter and having a first pair of controllable rectifiers comprising a first transistor connected to a first terminal of the coil and a second transistor connected to a second terminal of the coil; and
a control unit separate from the power transmitter and operable to control switching of the transistors of the full-wave rectifier so that the full-wave rectifier (a) generates a rectified output for charging a battery of the wireless power receiver by rectifying current through the coil or voltage across the coil and (b) regulates the rectified output.
3 Assignments
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Accused Products
Abstract
A rectification and regulation circuit for a wireless power receiver includes a coil for magnetically coupling to a primary coil of a power transmitter, a full-wave rectifier circuit separate from the power transmitter and a control unit separate from the power transmitter. The full-wave rectifier has a first pair of controllable rectifiers including a first transistor connected to a first terminal of the coil and a second transistor connected to a second terminal of the coil. The control unit is operable to control switching of the transistors of the full-wave rectifier so that the full-wave rectifier (a) generates a rectified output for charging a battery f the wireless power receiver by rectifying current through the coil or voltage across the coil, and (b) regulates the rectified output.
12 Citations
20 Claims
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1. A rectification and regulation circuit for a wireless power receiver, the rectification and regulation circuit comprising:
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a coil for magnetically coupling to a primary coil of a power transmitter; a full-wave rectifier separate from the power transmitter and having a first pair of controllable rectifiers comprising a first transistor connected to a first terminal of the coil and a second transistor connected to a second terminal of the coil; and a control unit separate from the power transmitter and operable to control switching of the transistors of the full-wave rectifier so that the full-wave rectifier (a) generates a rectified output for charging a battery of the wireless power receiver by rectifying current through the coil or voltage across the coil and (b) regulates the rectified output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of rectification and regulation for a wireless power receiver using a circuit including a full-wave rectifier having a first pair of controllable rectifiers comprising a first transistor connected to a first terminal of a coil and a second transistor connected to a second terminal of the coil, the method comprising:
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placing the wireless power receiver near a power transmitter to mutual-inductively couple the coil of the wireless power receiver to a primary coil of the power transmitter; and switching the transistors of the full-wave rectifier to (a) generate a rectified output for charging a battery of the wireless power receiver by rectifying current through the coil of the wireless power receiver or voltage across the coil of the wireless power receiver, and (b) regulate the rectified output. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless power receiver, comprising:
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a battery; a filter connected to the battery; a coil for magnetically coupling to a primary coil of a power transmitter; a full-wave rectifier separate from the power transmitter and connecting the coil to the Filter, the full-wave rectifier having a first pair of controllable rectifiers comprising a first transistor connected to a first terminal of the coil and a second transistor connected to a second terminal of the coil; and a control unit separate from the power transmitter and operable to control switching of the transistors of the full-wave rectifier so that the full-wave rectifier (a) generates a rectified output for charging the battery by rectifying current through the coil or voltage across the coil and (b) regulates the rectified output.
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Specification