Space-adaptive wireless power transfer system and method using evanescent field resonance
First Claim
Patent Images
1. A magnetic resonance wireless power transfer method, comprising:
- transferring power from a source coil to a transmitting (Tx) resonant coil using a magnetic induction method;
transferring the power from the Tx resonant coil to a receiving (Rx) resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance of magnetic evanescent field with non-directive property; and
transferring the power from the Rx resonant coil to a device coil of an electronic device using the magnetic induction method;
wherein in order to transfer the power irrespective of directionality, the Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other so that center axes of the Tx resonant coil and the Rx resonant coil are not parallel to each other, andwherein impedance matching at the source coil is performed by controlling the number of turns or size of the source coil or the interval between the source coil and the Tx resonant coil at a specific resonant frequency of the Tx resonant coil, or impedance matching at the device coil is performed by controlling the number of turns or size of the device coil or the interval between the device coil and the Rx resonant coil at the specific resonant frequency of the Rx resonant coil.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic resonance wireless power transfer method according to an aspect of the present invention includes transmitting power from a source coil to the Tx resonant coil using a magnetic induction method, transmitting the power from the Tx resonant coil to an Rx resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance, and transmitting the power from the Rx resonant coil to the device coil of an electronic device using the magnetic induction method. The Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other.
-
Citations
21 Claims
-
1. A magnetic resonance wireless power transfer method, comprising:
-
transferring power from a source coil to a transmitting (Tx) resonant coil using a magnetic induction method; transferring the power from the Tx resonant coil to a receiving (Rx) resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance of magnetic evanescent field with non-directive property; and transferring the power from the Rx resonant coil to a device coil of an electronic device using the magnetic induction method; wherein in order to transfer the power irrespective of directionality, the Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other so that center axes of the Tx resonant coil and the Rx resonant coil are not parallel to each other, and wherein impedance matching at the source coil is performed by controlling the number of turns or size of the source coil or the interval between the source coil and the Tx resonant coil at a specific resonant frequency of the Tx resonant coil, or impedance matching at the device coil is performed by controlling the number of turns or size of the device coil or the interval between the device coil and the Rx resonant coil at the specific resonant frequency of the Rx resonant coil.
-
-
2. A magnetic resonance wireless power transfer method, comprising:
-
transferring power from a source coil to a Tx resonant coil using a magnetic induction method; transferring the power from the Tx resonant coil to an intermediate resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance; transferring the power from the intermediate resonant coil to an Rx resonant coil, having a resonant frequency identical with the Rx resonant coil, via magnetically-coupled resonance; and transferring the power from the Rx resonant coil to a device coil of an electronic device using a magnetic induction method; wherein the intermediate resonant coil is placed at a right angle or an angle of inclination relative to the Tx resonant coil and the Rx resonant coil, and wherein impedance matching at the source coil is performed by controlling the number of turns or size of the source coil or the interval between the source coil and the Tx resonant coil at a specific resonant frequency of the Tx resonant coil.
-
-
3. A magnetic resonance wireless power transfer system, comprising:
-
a source coil configured to be supplied with power from a source; a Tx resonant coil configured to be supplied with the power from the source coil using a magnetic induction method; and an Rx resonant coil configured to be supplied with the power from the Tx resonant coil at a resonant frequency identical with that of the Tx resonant coil via magnetically-coupled resonance of magnetic evanescent field with non-directive property, wherein in order to transfer the power irrespective of directionality, the Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other so that center axes of the Tx resonant coil and the Rx resonant coil are not parallel to each other, and the Rx resonant coil transfers the power to a device coil of an electronic device using the magnetic induction method, and wherein impedance matching at the source coil is performed by controlling the number of turns or size of the source coil or the interval between the source coil and the Tx resonant coil at a specific resonant frequency of the Tx resonant coil, or impedance matching at the device coil is performed by controlling the number of turns or size of the device coil or the interval between the device coil and the Rx resonant coil at the specific resonant frequency of the Rx resonant coil. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
-
-
11. A magnetic resonance wireless power transfer system, comprising:
-
a source coil configured to be supplied with power from a source; a Tx resonant coil configured to be supplied with the power from the source coil using a magnetic induction method; an intermediate resonant coil supplied with power from the Tx resonant coil at a resonant frequency identical with that of the Tx resonant coil using a magnetic resonance mechanism; and an Rx resonant coil configured to be supplied with the power from the intermediate resonant coil at a resonant frequency identical with that of the intermediate resonant coil via magnetically-coupled resonance, wherein the intermediate resonant coil is placed at a right angle or an angle of inclination relative to the Tx resonant coil and the Rx resonant coil, and the Rx resonant coil transfers the power to a device coil of an electronic device using a magnetic induction method, and wherein impedance matching at the source coil is performed by controlling the number of turns or size of the source coil or the interval between the source coil and the Tx resonant coil at a specific resonant frequency of the Tx resonant coil. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification