Power transmitting device, power receiving device, and wireless power transmitting system

• US 10,224,748 B2
• Filed: 06/25/2014
• Issued: 03/05/2019
• Est. Priority Date: 06/27/2013
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Yamada, Akiko, Shijo, Tetsu, Obayashi, Shuichi, Ishihara, Hiroaki, Onizuka, Kohei, Ogawa, Kenichirou, Moritsuka, Fumi, Kudo, Hiroki, Oodachi, Noriaki
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Vu, Toan
• Application Number:
  US14/314,584
• Publication Number:
  US 20150001955A1
• Time in Patent Office: 1,714 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

According to one embodiment, there is provided a power transmitting device including: a power supply, a resonator, an adjuster and a controller. The power supply supplies AC power. The resonator includes a magnetic core and a coil wound around the magnetic core, the resonator wirelessly transmitting the AC power supplied from the power supply to a different resonator arranged to be opposed to the resonator. The adjuster relatively moves the coil and the magnetic core along a longitudinal direction of the coil. The controller controls the adjuster based on a value of current flowing in the resonator to adjust relative positions of the magnetic core and the coil.

Claims

1. A power transmitting device comprising:

a power supply to supply AC (Alternating Current) power;

a resonator including a magnetic core and a coil wound around the magnetic core, the resonator wirelessly transmitting the AC power supplied from the power supply to a different resonator arranged to be opposed to the resonator;

an adjuster to move magnetic core along a longitudinal direction of the coil; and

a controller to control the adjuster based on a value of current flowing in the resonator to adjust relative positions of the magnetic core and the coil,

wherein the magnetic core includes a plurality of magnetic blocks spaced apart from each other, and

the adjuster moves only a part of the magnetic blocks along the longitudinal direction of the coil.

2. The device according to claim 1, wherein the controller moves the magnetic core such that the value of current flowing in the resonator becomes maximum, or the value of current becomes equal to or higher than a threshold value.

3. The device according to claim 1, wherein a cross section of the magnetic core is changed along a longitudinal direction of the coil in a range within which the coil is able to move relative to the magnetic core.

4. The device according to claim 1, further comprising

a tube-shaped bobbin, wherein

the magnetic core is arranged in a hole of the bobbin,

the coil is wound around the bobbin, and

the adjuster moves the bobbin and the magnetic core along the longitudinal direction of the coil.