SYSTEM AND METHOD FOR WIRELESS POWER TRANSFER USING A TWO HALF-BRIDGE TO ONE FULL-BRIDGE SWITCHOVER
First Claim
1. A wireless power transfer system comprising:
- a controller;
first and second transmitters coupled to the controller, the first and second transmitters being coupled to one another by an electrical connection; and
a switch coupled between the electrical connection and a voltage rail;
wherein;
when the switch is closed, the controller operates the first and second transmitters in a two half-bridge mode; and
when the switch is open, the controller operates the first and second transmitters in a one full-bridge mode.
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Accused Products
Abstract
A system and method of wireless power transfer using a two half-bridge to one full-bridge switchover includes a wireless power transfer system. The wireless power transfer system includes a controller, first and second transmitters coupled to the controller, the first and second transmitters being coupled to one another by an electrical connection, and a switch coupled between the electrical connection and a voltage rail. When the switch is closed, the controller operates the first and second transmitters in a two half-bridge mode. When the switch is open, the controller operates the first and second transmitters in a one full-bridge mode.
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Citations
20 Claims
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1. A wireless power transfer system comprising:
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a controller; first and second transmitters coupled to the controller, the first and second transmitters being coupled to one another by an electrical connection; and a switch coupled between the electrical connection and a voltage rail; wherein; when the switch is closed, the controller operates the first and second transmitters in a two half-bridge mode; and when the switch is open, the controller operates the first and second transmitters in a one full-bridge mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless power transfer circuit comprising:
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a first resonant circuit configured for wireless power transfer; a first driver circuit configured to drive the first resonant circuit with a first drive signal, the first drive signal having a first frequency, amplitude, and phase; a second resonant circuit configured for wireless power transfer; a second driver circuit configured to drive the second resonant circuit with a second drive signal, the second drive signal having a second frequency, amplitude, and phase; an electrical connector coupling the first and second resonant circuits; and a switch coupled between the electrical connector and a first rail; wherein; when the switch is closed, the wireless power transfer circuit operates in a two half-bridge mode; and when the switch is open, the wireless power transfer circuit operates in a one full-bridge mode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for switching between a two half-bridge mode and a one full-bridge mode during wireless power transfer, the method comprising:
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when switching to the two half-bridge mode; closing a switch coupled between an electrical connector between two wireless power transmitters and a ground node; and independently controlling the two wireless power transmitters; and when switching to the one full-bridge mode; opening the switch, causing the two wireless power transmitters to operate as a combined transmitter; and synchronously controlling the combined transmitter.
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Specification