Power supply system

• US 7,514,818 B2
• Filed: 10/24/2006
• Issued: 04/07/2009
• Est. Priority Date: 10/26/2005
• Status: Expired due to Fees

• Current Assignee: Panasonic Electric Works Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Asahi Matsushita Electric Works Ltd. (Panasonic Holdings Corporation)
• Inventors: Abe, Hideaki, Yamashita, Mikihiro, Kitamura, Hiroyasu
• Primary Examiner(s): DeBeradinis; Robert L.
• Application Number:
  US11/585,219
• Publication Number:
  US 20070091519A1
• Time in Patent Office: 896 Days
• Field of Search: 307/104
• US Class Current: 307/104
• CPC Class Codes: H01F 3/00 Cores, Yokes, or armatures magnetic materials H01F1/00; permanent magnets H01F7/02
• CPC Class Codes: H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
• 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 50/005 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 50/10 using inductive coupling
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

A power supply system is capable of feeding electric power from a power adapter to a plurality of load devices. The power adapter includes a primary core; and a primary coil wound around the primary core for serving as a output port of the power adapter to output an alternating current. The load devices include secondary cores for simultaneously forming magnetic circuits between the primary core and the load devices; and secondary coils wound around the secondary cores for feeding output power to the load devices. The primary core has two pairs of protrusions, and the secondary cores are arranged on opposite sides of the primary core in such a manner that the primary core lies between the secondary cores to feed electric power simultaneously to the load devices.

Claims

1. A power supply system for feeding electric power from a power adapter to a plurality of load devices,

wherein the power adapter includes:

a primary core; and

a primary coil wound around the primary core for serving as a output port of the power adapter to output an alternating current, and

wherein the load devices include;

secondary cores for simultaneously forming magnetic circuits between the primary core and the load devices; and

secondary coils wound around the secondary cores for feeding output power to the load devices.

2. The power supply system of claim 1, wherein the primary core has two pairs of protrusions, each of the pairs of the protrusions extending in a same direction, and one of the pairs of the protrusions oriented in an opposite direction with respect to the other of the pairs of the protrusions, and

wherein the secondary cores, each of which has a pair of protrusions extending in a same direction, are arranged on opposite sides of the primary core in such a manner that the primary core lies between the secondary cores to feed electric power simultaneously to the load devices.

3. The power supply system of claim 2, wherein an electric shaver serves as a first load device of the load devices, and a cleaning device used for the electric shaver serves as a second load device of the load devices, and

wherein the electric shaver is to be fed with the electric power directly from the power adapter and to be electrically charged in a state that the electric shaver is mounted on the cleaning device.

4. The power supply system of claim 1, wherein the primary core has two pairs of protrusions and a shaft portion wound with the primary coil, each of the pairs of protrusions extending in a same direction from the shaft portion, and one of the pairs of protrusions oriented in an orthogonal direction with respect to the other of the pairs of protrusions, and

wherein each of the secondary cores has two pairs of protrusions, each of the pairs of protrusions extending in a same direction, and the secondary cores arranged in such a manner that the secondary cores form an “

L”

-shape with the primary core when viewed from an axial direction of the shaft portion to feed electric power simultaneously to the load devices.

5. The power supply system of claim 4, wherein an electric shaver serves as a first load device of the load devices, and a cleaning device used for the electric shaver serves as a second load device of the load devices, and

wherein the electric shaver is to be fed with the electric power directly from the power adapter and to be electrically charged in a state that the electric shaver is mounted on the cleaning device.

6. The power supply system of claim 1, wherein the primary core is formed in a bobbin shape and the secondary cores are formed in a square bracket shape, the secondary cores arranged in plural numbers around the primary core in such a manner that opposite ends of the secondary cores face flanges of the primary core to feed electric power simultaneously to the load devices.