Wireless power transmission device
AssigneeGE Hybrid Technologies, LLC
InventorsChun Kil Jung, Hak Do Kim, Sang Youn Noh
Life of this patent
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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.
Claims20
A wireless power transmission apparatus comprising:
- a primary core that includes both a primary resonant coil and a primary inductive coil, wherein the primary resonant coil and the primary inductive coil are wound side by side in a spiral form on a same plane around a same center point, and wherein the primary core is configured to operate in either an inductive wireless power transmission mode using the primary inductive coil or a resonant wireless power transmission mode using the primary resonant coil;
- a switch connected to the primary resonant coil of the primary core, wherein the switch is responsive to a control signal that activates or deactivates the resonant wireless power transmission mode;
- a driving circuit connected to the primary core and configured to provide a driving signal to the primary core when a wireless power reception apparatus is detected in proximity to the primary core;
- and
- a control circuit connected to the primary core and the driving circuit, the control circuit configured to determine whether the wireless power reception apparatus is a resonance type or an inductance type, wherein the control circuit is further configured to provide the control signal to the switch to activate the resonant wireless power transmission mode when the wireless power reception apparatus is the resonance type or to deactivate the resonant wireless power transmission mode when the wireless power reception apparatus is the inductance type.
A primary core for use in a wireless power transmission apparatus comprising:
- a primary resonant coil wound in a spiral form around a center point, the primary resonant coil for use in a resonant wireless power transmission mode;
- a primary inductive coil wound in the spiral form on around the center point, the primary inductive coil for use in an inductive wireless power transmission mode, wherein the primary resonant coil and the primary inductive coil are wound in the spiral form on a same plane;
- a switch connected to the primary resonant coil to control activation or deactivation of the resonant wireless power transmission mode;
- and
- a capacitor coupled to the primary resonant coil so as to form a magnetic resonance with the primary resonant coil when the resonant wireless power transmission mode is activated.
A wireless power transmission method for transmitting wireless power by a wireless power transmission apparatus, the method comprising:
- detecting a wireless power reception apparatus in proximity to a primary core of the wireless power transmission apparatus, wherein the primary core includes both a primary resonant coil and a primary inductive coil that are wound side by side in a spiral form on a same plane around a same center point, and wherein the primary core is configured to operate in either an inductive wireless power transmission mode using the primary inductive coil or a resonant wireless power transmission mode using the primary resonant coil;
- determining whether the wireless power reception apparatus is a resonance type or an inductance type;
- and
- controlling a switch connected to the primary resonant coil of the primary core, wherein controlling the switch includes activating the resonant wireless power transmission mode when the wireless power reception apparatus is the resonance type or deactivating the resonant wireless power transmission mode when the wireless power reception apparatus is the inductance type.
Dependencies are inferred from the claim text.