Short distance wireless power transmitting apparatus which enchances wireless power transmitting capability regardless of a relative arrangment with respect to a wireless power receiving apparatus
View Patent ↗Disclosed herein are a coil resonant coupler for short distance wireless power communication and a short distance wireless power transmitting apparatus comprising the same. The coil resonant coupler for short distance wireless power communication comprises a first coil installed perpendicularly to a first axis; a second coil installed perpendicularly to a second axis perpendicular to the first axis; and a third coil installed perpendicularly to a third axis perpendicular to each of the first and second axes. The short distance wireless power transmitting apparatus comprises a primary side core comprising the above-described coil resonant coupler, a position sensing unit which senses a position of the wireless power receiving apparatus to generate position information, and a transmission controlling unit which controls the primary side core based on the position information.
1. A short distance wireless power transmitting apparatus, comprising:
a primary side core including:
a first coil installed perpendicularly to a first axis;
a second coil installed perpendicularly to a second axis perpendicular to the first axis;
a third coil installed perpendicularly to a third axis perpendicular to each of the first and second axes;
a magnetic focusing plate formed on a same plane as that of the first coil and installed at an inner side of the first coil to focus a magnetic field for improving transmission efficiency; and
a fixing bar configured to fix the magnetic focusing plate to the second coil and consisted of a non-conductive material;
a position sensing unit sensing a 3-D position of the wireless power receiving apparatus to generate 3-D position information of the wireless power receiving apparatus by using a response signal received from the wireless power receiving apparatus; and
a transmission controlling unit controlling the primary side core based on the 3-D position information received from the position sensing unit.
2. The short distance wireless power transmitting apparatus of claim 1 , wherein the transmission controlling unit controls a decoupling of at least one of the first to third coils based on a position vector information of the 3-D position information.
3. The short distance wireless power transmitting apparatus of claim 1 , wherein the transmission controlling unit controls a generation of a power signal with respect to at least one of the first to third coils based on a position vector information of the 3-D position information.
4. The short distance wireless power transmitting apparatus of claim 1 , wherein the position sensing unit generates a pulse signal through one or more of the first to third coils, receives the response signal to the pulse signal through one or more of the first to third coils, and analyzes the response signal to generate the 3-D position information.
5. The short distance wireless power transmitting apparatus of claim 1 , wherein the position sensing unit is an ultrasonic sensor.
6. The short distance wireless power transmitting apparatus of claim 1 , wherein the position sensing unit senses the 3-D position by using a phase change of the response signals which are respectively received by the first coil, the second coil and the third coil.
7. The short distance wireless power transmitting apparatus of claim 1 , wherein the position sensing unit senses the 3-D position by using a delay time of the response signals which are respectively received by the first coil, the second coil and the third coil.