CONTACTLESS POWER TRANSFER TRANSFORMER FOR MOVING BODY

• US 20150123486A1
• Filed: 05/21/2013
• Published: 05/07/2015
• Est. Priority Date: 05/21/2012
• Status: Active Grant

• Current Assignee: Technova, Inc. (Aisin Corp.)
• Original Assignee: Technova, Inc. (Aisin Corp.)
• Inventors: Abe, Shigeru, Kaneko, Yasuyoshi, Yasuda, Tomio, Kishi, Hiroyuki
• Granted Patent: US 9,793,045 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• 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 50/70 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

According to one embodiment, contactless power transfer transformer includes power transmission coil and power reception coil. At least one of the power transmission coil and the power reception coil is configured by coupled and both-sides wound coil. The coupled and both-sides wound coil is configured by both-sides wound coils. One of magnetic poles of one of the both-sides wound coils is connected to one of the magnetic poles of adjacent one of the both-sides wound coils. Directions of magnetic fluxes toward corresponding coil from each of the magnetic poles connected to each other are identical. The both-sides wound coils are selected so that leakage magnetic flux around moving body does not exceed predetermined value. Number of the both-sides wound coils is set so that value obtained by multiplying power transfer capacity of one of the both-sides wound coils by the number satisfies capacity of the transformer.

Claims

1. A contactless power transfer transformer for a moving body, comprising:

a power transmission coil; and

a power reception coil, wherein

the power reception coil is installed at a position at which the moving body is installed,

contactless power transfer is performed when the moving body is moved to a power transfer position at which the power transmission coil and the power reception coil oppose each other,

at least one of the power transmission coil and the power reception coil is configured by a coupled and both-sides wound coil,

the coupled and both-sides wound coil is configured by combining a plurality of single both-sides wound coils,

a winding wire is wound around a wound portion between magnetic pole portions of a core in each of the single both-sides wound coils,

in the coupled and both-sides wound coil, the single both-sides wound coils are combined so that each wound portion of the single both-sides wound coils is arranged linearly with respect to each other, one of the magnetic pole portions of one of the single both-sides wound coils is connected to one of the magnetic pole portions of adjacent one of the single both-sides wound coils, and directions of magnetic fluxes in a vertical direction toward a corresponding coil from each of the magnetic pole portions connected to each other are identical,

each of the single both-sides wound coils is selected so that a leakage magnetic flux around the moving body of when the coupled and both-sides wound coil configured by two single both-sides wound coils is arranged at the install position of the moving body does not exceed a predetermined value, and

a number of the single both-sides wound coils configuring the coupled and both-sides wound coil is set so that a value obtained by multiplying power transfer capacity of one of the selected single both-sides wound coils by the number satisfies power transfer capacity of the contactless power transfer transformer.

2. The contactless power transfer transformer for the moving body of claim 1, wherein the power reception coil configured by the coupled and both-sides wound coil is installed at a install position at a bottom face of the moving body so that an arrangement direction of the single both-sides wound coils in the coupled and both-sides wound coil coincides with a front and back direction of the moving body.

3. The contactless power transfer transformer for the moving body of claim 1, wherein each of the single both-sides wound coils includes an H-shape core in which the wound portion is arranged at a middle part between a pair of the parallel magnetic pole portions.

4. The contactless power transfer transformer for the moving body of claim 3, wherein, if a width in the arrangement direction of the single both-sides wound coils of the coupled and both-sides wound coil and obtained by adding widths of the connected magnetic pole portions is D1, and if a width of the magnetic pole portion positioned at an end portion of the coupled and both-sides wound coil is D2, D1<

2×

D2.

5. The contactless power transfer transformer for the moving body of claim 1, wherein

the power transmission coil and the power reception coil are each configured by the coupled and both-sides wound coil that is configured by combining the two single both-sides wound coils,

in the coupled and both-sides wound coil of one of the power transmission coil and the power reception coil, winding wires of the two single both-sides wound coils are electrically connected to each other in series, and

in the coupled and both-sides wound coil of other one of the power transmission coil and the power reception coil, the winding wires of the two both-sides wound coils are electrically connected to each other in parallel.

6. The contactless power transfer transformer for the moving body of claim 1, wherein,

the power transmission coil and the power reception coil are each configured by the coupled and both-sides wound coil that is configured by combining m pairs of the two single both-sides wound coils,

in the coupled and both-sides wound coil of one of the power transmission coil and the power reception coil, the winding wires of each of the two single both-sides wound coils in each of the m pairs of the two single both-sides wound coils are electrically connected to each other in series, and winding wires of each of the m pairs of the two single both-sides wound coils are electrically connected to each other in parallel, and

in the coupled and both-sides wound coil of other one of the power transmission coil and the power reception coil, the winding wires of each of the two single both-sides wound coils in each of the m pairs of the two single both-sides wound coils are electrically connected to each other in parallel, and the winding wires of each of the m pairs of the two single both-sides wound coils are electrically connected to each other in parallel.

7. The contactless power transfer transformer for the moving body of claim 1, wherein,

the power transmission coil and the power reception coil are both configured by the coupled and both-sides wound coil configured by combining m pairs of the two single both-sides wound coils, and

in the coupled and both-sides wound coil, the winding wires of each of the two single both-sides wound coils in each of the m pairs of the two single both-sides wound coils are electrically connected to each other in series, and the winding wires of each of the m pairs of the single both-sides wound coils are electrically connected to each other in parallel.

8. The contactless power transfer transformer for the moving body of claim 1, wherein

one of the power transmission coil and the power reception coil is configured by the coupled and both-sides wound coil that is configured by combining the two single both-sides would coils, and

other one of the power transmission coil and the power reception coil is configured by a one-side wound coil in which an electric wire is wound in a flattened circle at one face of a flattened plate ferrite magnetic core.