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 resonant coil capable of transmitting wireless power to a first type of wireless power reception apparatus via magnetic resonance coupling;
- at least one switch connected to the primary resonant coil and configured to enable or disable operation of the primary resonant coil;
- a primary inductive coil capable of transmitting wireless power to a second type of wireless power reception apparatus via magnetic induction coupling, wherein the primary inductive coil transmits wireless power to the primary resonant coil via magnetic induction coupling when the at least one switch enables operation of the primary resonant coil;
- a driving circuit connected to the primary inductive coil and configured to supply a driving signal to the primary inductive coil;
- and
- a control circuit coupled with the at least one switch and configured to control the at least one switch to enable or disable the operation of the primary resonant coil based on a determination that the wireless power reception apparatus is the first type or the second type, respectively.
A primary core for use in a wireless power transmission apparatus comprising:
- a primary resonant coil for use in a resonant wireless power transmission mode;
- a primary inductive coil for use in an inductive wireless power transmission mode;
- a switch connected to the primary resonant coil to enable or disable the resonant wireless power transmission mode based on a control signal from a control circuit of the wireless power transmission apparatus;
- 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 enabled.
A 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 a primary inductive coil and a 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 enabling the primary resonant coil when the wireless power reception apparatus is the resonance type.
Dependencies are inferred from the claim text.