Wireless power transmission device
First Claim
1. A wireless power transmission apparatus comprising:
- a primary core comprising a primary resonant coil wound in a spiral form around a center point and a primary inductive coil supplying power to the primary resonant coil in a contactless form with an input terminal or an output terminal of the primary resonant coil and wound in a spiral form on a substantially same plane around a substantially same center point as the center point of the primary resonant coil, wherein the primary core is configured to operate in either an inductive operation mode or a resonant operation mode to transmit wireless power to a wireless power reception apparatus;
a driving circuit connected to the primary core and configured to apply a driving signal to the primary core;
a control circuit connected to the primary core and the driving circuit and configured to provide a control signal for controlling a switch of the primary core;
a plurality of capacitors that includes capacitors connected to both ends of the switch of the primary core; and
a measurement circuit configured to measure a current or voltage of the primary core.
2 Assignments
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Accused Products
Abstract
A coil structure for wireless power transmission is provided. The coil structure comprises: a primary resonance coil wound in a spiral shape around a centripetal point; a primary induction coil, which supplies power to the primary resonance coil in a nonconnected state with an input or output terminal of the primary resonance coil and is wound in a spiral shape on a substantially same plane around a substantially same centripetal point as the centripetal point; a switch configured to be parallel with the primary resonance coil so as to control the ON and OFF of an operation of the primary resonance coil; and a capacitor coupled to the primary resonance coil so as to form a magnetic resonance with the primary resonance coil.
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Citations
14 Claims
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1. A wireless power transmission apparatus comprising:
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a primary core comprising a primary resonant coil wound in a spiral form around a center point and a primary inductive coil supplying power to the primary resonant coil in a contactless form with an input terminal or an output terminal of the primary resonant coil and wound in a spiral form on a substantially same plane around a substantially same center point as the center point of the primary resonant coil, wherein the primary core is configured to operate in either an inductive operation mode or a resonant operation mode to transmit wireless power to a wireless power reception apparatus; a driving circuit connected to the primary core and configured to apply a driving signal to the primary core; a control circuit connected to the primary core and the driving circuit and configured to provide a control signal for controlling a switch of the primary core; a plurality of capacitors that includes capacitors connected to both ends of the switch of the primary core; and a measurement circuit configured to measure a current or voltage of the primary core. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless power transmission coil structure comprising:
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a primary resonant coil wound in a spiral form around a center point; a primary inductive coil supplying power to the primary resonant coil in a contactless form with an input terminal or an output terminal of the primary resonant coil and wound in a spiral form on a substantially same plane around a substantially same center point as the center point of the primary resonant coil; a switch disposed in parallel with the primary resonant coil to control ON and OFF of an operation of the primary resonant coil; and a capacitor coupled to the primary resonant coil so as to form a magnetic resonance with the primary resonant coil, wherein the switch is turned on in a resonant operation mode, and the switch is turned off in an inductive operation mode. - View Dependent Claims (7, 8, 9, 10)
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11. A wireless power transmission method comprising:
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transmitting power generated by magnetic induction in a primary inductive coil wound in a spiral form around a center point to a primary resonant coil, here, the primary resonant coil being wound in a spiral form on a same plane around a substantially same center point as the center point and being provided in a contactless form with an input terminal and an output terminal of the primary inductive coil; generating a magnetic resonance in the primary resonant coil and transmitting the power to a wireless power reception apparatus; and controlling ON and OFF of an operation of the primary resonant coil based on a switch disposed in parallel with the primary resonant coil, wherein the controlling of ON and OFF of the operation comprises turning on the switch in a resonant operation mode and turning off the switch in an inductive operation mode. - View Dependent Claims (12, 13, 14)
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Specification