POWER TRANSMISSION SYSTEM

• US 20140246918A1
• Filed: 02/10/2014
• Published: 09/04/2014
• Est. Priority Date: 03/01/2013
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: SHIJO, Tetsu, HIGAKI, Makoto, OBAYASHI, Shuichi
• Application Number:
  US14/176,560
• Publication Number:
  US 20140246918A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

In one embodiment, a power transmission system includes a power transmission apparatus having a power source unit supplying a high-frequency power, and a power transmission inductor including a magnetic core and a winding wire portion and wirelessly transmitting the high-frequency power from the power source unit to a power reception apparatus by mutual inductance, and an electromagnetic wave leakage prevention device including one conductive loop or a plurality of conductive loops disposed at predetermined intervals. The power transmission apparatus is disposed in the loop(s). A winding direction of the loop(s) is not perpendicular to a winding direction of the winding wire portion.

Claims

1. A power transmission system, comprising:

a power transmission apparatus comprising a power source unit supplying a high-frequency power, and a power transmission inductor including a magnetic core and a winding wire portion and wirelessly transmitting the high-frequency power from the power source unit to a power reception apparatus by mutual inductance; and

an electromagnetic wave leakage prevention device including one conductive loop or a plurality of conductive loops disposed at predetermined intervals,

wherein the power transmission apparatus is disposed in the loop(s), and

a winding direction of the loop(s) is not perpendicular to a winding direction of the winding wire portion.

2. The system according to claim 1, wherein the loop(s) is/are wound in the same direction as the winding wire portion.

3. The system according to claim 1, wherein the plurality of loops includes a conductor plate and a plurality of conductive wires, and both ends of the conductive wires are connected to the conductor plate.

4. The system according to claim 1, further comprising a sensor detecting an entry of a foreign object into the electromagnetic wave leakage prevention device,

wherein when the sensor detects the entry of the foreign object, the power transmission apparatus stops transmitting the high-frequency power.

5. The system according to claim 1, wherein each loop is covered with an insulator.

6. The system according to claim 1, further comprising an insulation sheet covering the plurality of loops.

7. The system according to claim 1, wherein a configuration of the loop is rectangular or semicircular.