Non-contact type power feeder system for mobile object and protecting apparatus thereof

• US 7,804,272 B2
• Filed: 11/08/2007
• Issued: 09/28/2010
• Est. Priority Date: 11/10/2006
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Heavy Industries Engineering, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Mitake, Masaya, Yamashita, Hiroshi, Yamada, Masaomi, Katahira, Kousuke, Morita, Katsuaki, Yamaguchi, Masahiro
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US11/936,916
• Publication Number:
  US 20080129246A1
• Time in Patent Office: 1,055 Days
• Field of Search: 320/107, 320/108, 320/109, 310/12.01, 310/12.02, 310/12.09, 104/282, 104/292, 290/16, 290/50
• US Class Current: 320/108
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• 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: B60M 7/00 Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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

Abstract

A noncontact type power feeder system for feeding a power to a mobile object, in which a power feeding portion and a power receiving portion can be easily manufactured at low costs and which can transmit a high power. The noncontact type power feeder system for a mobile object, comprises a power feeding portion provided in a surface on which the mobile object runs, and a power receiving portion provided in the lower part of the mobile object at a position facing to the power supply portion, the each of the power feeding portion and the power receiving portion is composed of windings formed in an oval shape, and a magnetic planar core formed therein with a recess in which the windings are accommodated so that the longitudinal direction of the oval shape of the windings is extended along the travel direction of the mobile object, the planer core is composed of several planar blocks each having a rectangular surface, several blocks being laid so that long sides of the rectangular surfaces are extended in the travel direction of the mobile object, in which several blocks are also laid in the direction orthogonal to the travel direction, and several blocks being superposed one upon another, the recess of the planar core is defined by thick wall parts in which the planar cores are superposed on the surface of the planar core, outside and inside of the oval shape part of the windings.

Claims

1. A noncontact type power feeder system comprising a power feeding portion provided along a track way for a mobile object, and a power receiving portion provided in the mobile object, the power feeding portion being opposed face-to-face to the power receiving portion so as to feed a power thereto characterized in that:

each of the power feeding portion and the power receiving portion is formed of windings formed in an oval shape, and a magnetic planar core formed in its surface with a recess for accommodating therein the windings;

the planar core is formed of an assembly of planer blocks each having a rectangular surface, the assembly of planar blocks comprises thin wall parts in which several planar blocks are laid in one and the same plane with their long sides being made into contact with one another, and thick wall parts in which several planer blocks are superposed one upon another, the recess of the planar core is defined by the thick wall parts in which planar blocks are superposed on the surface of the planar core outside and inside of the oval shape part of the windings,

the longitudinal direction of the oval shape of the windings and the long sides of the planar blocks are directed in a travel direction of a mobile object when the power feeding portion and the power receiving portion are opposed face-to-face to each other.

2. A noncontact type power feeder system as set forth in claim 1, characterized in that the planer core is provided at its opposite ends with U-like sectional shape parts for supporting opposite ends of the windings in the longitudinal direction of the oval shape of the windings, and accordingly, the windings are supported by the planer core along its entire periphery of the windings.

3. A noncontact type power feeder system as set forth in claim 1, characterized in that the recess of the planer core has an opening width which is equal to or larger than the gap between the power feeding portion and the power receiving portion.

4. A noncontact type power feeder system as set forth in claim 1, characterized in that the length of the power feeding portion in the travel direction is set to be longer than the length of the power receiving portion in the travel direction when the power feeding portion and the power receiving portion are opposed face-to-face to each other.

5. A noncontact type power feeder system as set forth in claim 1, wherein said planer bocks are combined so as to form the surface of the planar core in a rectangular shape.

6. A noncontact type power feeder system as set forth in claim 2, characterized in that the thick wall parts and the thin wall parts are arranged alternately along the travel direction of the mobile objects, and the thick wall parts and the thick wall parts are arranged with point symmetry with respect to the center point of the planar core.

7. A noncontact type power feeder system as set forth in claim 2, characterized in that the planer core is divided into sections along the travel direction of the mobile object, and air gap parts are defined between the divided sections of the planar core while the planar core is composed of the thick wall parts, except the recess, and the thick wall parts and the air gap parts are arranged with point symmetry with respect to the center point of the planar core.

8. A protecting apparatus for a noncontact type power feeder system, for accommodating therein and protecting the power feeding portion or the power receiving portion having a configuration as stated in claim 1, characterized in that a protecting cover having an internal accommodation space is attached to a base board mounted to a mobile object or around a track way for the mobile object, and the power feeding portion or the power receiving portion is accommodated in the internal accommodation space with a planar insulation member being interposed between itself and the base board.

9. A protecting apparatus for a noncontact type power feeder system for a mobile object as set forth in claim 8, characterized in that an air gap part is defined in the center part of the planar core, and a spacer for filling a space between the planar insulation member and the protecting cover is provided in the air gap part.