WIRELESS POWER TRANSMITTER
First Claim
1. A resonant transmission unit, comprising:
- a first inductor with a center tap, a first end tap and a second end tap;
a first transistor coupled between the first end tap and a ground;
a second transistor coupled between the second end tap and the ground;
a pre-regulator coupled to provide current to the center tap; and
a resonant circuit magnetically coupled to the first inductor,wherein gates of the first transistor and the second transistor are driven to transmit power with the resonant circuit.
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Accused Products
Abstract
A wireless power transmission system is presented. In some embodiments, a transmission unit includes a first inductor with a center tap, a first end tap, and a second end tap; a pre-regulator coupled to provide current to the center tap; a switching circuit coupled to the first end tap and the second end tap, the switching circuit alternately coupling the first end tap and the second end tap to ground at a frequency; and a resonant circuit magnetically coupled to the first inductor, the resonant circuit wirelessly transmitting power. In some embodiments, the switching circuit can be formed of FETs. The current provided to the center tap can be controlled in response to current sensors.
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Citations
24 Claims
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1. A resonant transmission unit, comprising:
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a first inductor with a center tap, a first end tap and a second end tap; a first transistor coupled between the first end tap and a ground; a second transistor coupled between the second end tap and the ground; a pre-regulator coupled to provide current to the center tap; and a resonant circuit magnetically coupled to the first inductor, wherein gates of the first transistor and the second transistor are driven to transmit power with the resonant circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transmission unit, comprising:
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a first inductor with a center tap, a first end tap, and a second end tap; a pre-regulator coupled to provide current to the center tap; a switching circuit coupled to the first end tap and the second end tap, the switching circuit alternately coupling the first end tap and the second end tap to ground at a frequency; and a resonant circuit magnetically coupled to the first inductor, the resonant circuit wirelessly transmitting power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method of transmitting power, comprising:
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providing current to a center tap of a first inductor; alternately coupling a first end of the first inductor and a second end of the first inductor to ground at a frequency; and magnetically coupling a resonant circuit with the first inductor. - View Dependent Claims (21, 22, 23, 24)
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Specification