Wireless power transmission devices, wireless power reception devices, wireless power transmission systems, and wireless power transmission methods

Patent metadata

Field	Value
Publication number	US-9396870-B2
Application number	US-201314071956-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Dec 14, 2012
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A wireless power transmission device may comprise a source coil; and/or a resonance coil inductively coupled to the source coil. The source coil may transmit power outside of the wireless power transmission device in an electromagnetic induction type during a first interval. The source coil may transmit the power to the resonance coil in the electromagnetic induction type and the resonance coil may transmit the power received from the source coil to the outside of the wireless power transmission device in a magnetic resonance type during a second interval that is different from the first interval.

First claim

What is claimed is:

1. A wireless power transmission device, comprising:
a source coil; and
a resonance coil inductively coupled to the source coil;
wherein the source coil transmits power outside of the wireless power transmission device in an electromagnetic induction type during a first interval, and
wherein the source coil transmits the power to the resonance coil in the electromagnetic induction type and the resonance coil transmits the power received from the source coil to the outside of the wireless power transmission device in a magnetic resonance type during a second interval that is different from the first interval.

2. The wireless power transmission device of claim 1 , wherein the resonance coil is short-circuited during the first interval, and
wherein the resonance coil is not short-circuited during the second interval that is different from the first interval.

3. The wireless power transmission device of claim 1 , wherein the resonance coil is open-circuited during the first interval, and
wherein the resonance coil is not open-circuited during the second interval that is different from the first interval.

4. A wireless power transmission device, comprising:
a source coil transmitting power in an electromagnetic induction type;
a resonance coil inductively coupled to the source coil and transmitting the power in a magnetic resonance type; and
a switch connected in parallel with the resonance coil;
wherein the switch is in an ON state and the resonance coil does not receive the power from the source coil during a first interval, and
wherein the switch is in an OFF state and the resonance coil receives the power from the source coil during a second interval that is different from the first interval.

5. The wireless power transmission device of claim 4 , wherein the source coil transmits the power outside of the wireless power transmission device in the electromagnetic induction type during the first interval, and
wherein the resonance coil transmits the power received from the source coil to the outside of the wireless power transmission device in the magnetic resonance type during the second interval that is different from the first interval.

6. The wireless power transmission device of claim 4 , wherein the resonance coil is short-circuited during the first interval, and
wherein the resonance coil is not short-circuited during the second interval that is different from the first interval.

7. A wireless power transmission device, comprising:
a source coil transmitting power in an electromagnetic induction type;
a resonance coil inductively coupled to the source coil to transmit the power in a magnetic resonance type; and
a switch connected in series with the resonance coil;
wherein the switch is in an OFF state and the resonance coil does not receive the power from the source coil during a first interval, and
wherein the switch is in an ON state and the resonance coil receives the power from the source coil during a second interval that is different from the first interval.

8. The wireless power transmission device of claim 7 , wherein the source coil transmits the power outside of the wireless power transmission device in the electromagnetic induction type during the first interval, and
wherein the resonance coil transmits the power received from the source coil to the outside of the wireless power transmission device in the magnetic resonance type during the second interval that is different from the first interval.

9. The wireless power transmission device of claim 7 , wherein the resonance coil is open-circuited during the first interval, and
wherein the resonance coil is not open-circuited during the second interval that is different from the first interval.

10. A wireless power reception device, comprising:
a load coil; and
a resonance coil inductively coupled to the load coil;
wherein the load coil receives power from an outside of the wireless power transmission device in an electromagnetic induction type during a first interval, and
wherein the resonance coil receives the power from the outside of the wireless power transmission device in a magnetic resonance type and the load coil receives the power from the resonance coil in the electromagnetic induction type during a second interval that is different from the first interval.

11. The wireless power reception device of claim 10 , wherein the resonance coil is short-circuited during the first interval, and
wherein the resonance coil is not short-circuited during the second interval that is different from the first interval.

12. The wireless power reception device of claim 10 , wherein the resonance coil is open-circuited during the first interval, and
wherein the resonance coil is not open-circuited during the second interval that is different from the first interval.

13. A wireless power transmission system, comprising:
a wireless power transmission device transmitting power; and
a wireless power reception device including a load coil to receive the power from the wireless power transmission device;
wherein the wireless power transmission device includes a source coil and a transmission resonance coil inductively coupled to the source coil,
wherein the source coil transmits the power to the load coil in an electromagnetic induction type during a first interval, and
wherein the source coil transmits the power to the transmission resonance coil in the electromagnetic induction type and the transmission resonance coil transmits the power received from the source coil to the load coil in a magnetic resonance type during a second interval that is different from the first interval.

14. A wireless power transmission method, comprising:
transmitting power to a wireless power reception device in an electromagnetic induction type using a source coil; and
transmitting the power to the wireless power reception device in a magnetic resonance type using a transmission resonance coil inductively coupled to the source coil.

15. The wireless power transmission method of claim 14 , wherein the transmitting the power in the electromagnetic induction type includes making the transmission resonance coil short-circuited, and
wherein the transmitting the power in the magnetic resonance type includes making the transmission resonance coil not short-circuited.

16. The wireless power transmission method of claim 14 , wherein the transmitting the power in the electromagnetic induction type includes making the transmission resonance coil open-circuited, and
wherein the transmitting the power in the magnetic resonance type includes making the transmission resonance coil not open-circuited.

17. The wireless power transmission method of claim 14 , wherein the transmitting the power in the electromagnetic induction type comprises receiving a reception power value, which a load of the wireless power reception device receives, from the wireless power reception device.

18. The wireless power transmission method of claim 17 , wherein the transmitting the power in the electromagnetic induction type further comprises measuring a transmission power value that is transmitted to the wireless power reception device.

19. The wireless power transmission method of claim 18 , wherein the transmitting the power in the electromagnetic induction type further comprises switching a power transmission type to the magnetic resonance type if a power transfer efficiency according to the transmission power value and the reception power value is lower than a reference

Assignees

• Moh Kyung-Goo
• Moon Sung-Woo
• Yeon Pyung-Woo
• Samsung Electronics Co Ltd

Inventors

• Moh Kyung-Goo
• Moon Sung-Woo
• Yeon Pyung-Woo

Classifications

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H04B5/0075

  Electricity · mapped topic

• H04B5/0037

  Electricity · mapped topic

• H04B5/79 Primary

  for data transfer in combination with power transfer · CPC title

• H04B5/24

  Inductive coupling · CPC title