Inductor unit, non-contact power supply system and electric vehicle

• US 10,703,217 B2
• Filed: 09/11/2018
• Issued: 07/07/2020
• Est. Priority Date: 03/01/2018
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ogawa, Kenichirou, Suzuki, Masatoshi
• Primary Examiner(s): Diao, M Baye
• Application Number:
  US16/127,675
• Publication Number:
  US 20190270388A1
• Time in Patent Office: 665 Days
• Field of Search: 320108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B66B 7/00 Other common features of elevators
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 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 50/12 of the resonant type
• 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 90/14 Plug-in electric vehicles

Abstract

According to one embodiment, an inductor unit includes a first inductor and a second inductor. The first inductor includes a first magnetic core and a first coil winded around the first magnetic core. The second inductor includes a second magnetic core and a second coil winded around the second magnetic core. The first inductor and the second inductor are placed so that a first angle between a first line and a fifth line is equal to or greater than 0 degrees and is equal to or less than 90 degrees. The cross section of the first coil in the width direction and a cross section of the first coil in the width direction are overlapping at least at direction of the first magnetic flux or direction of the second magnetic flux.

Claims

1. An inductor system comprising:

a first inductor including a first magnetic core and a first coil wound around the first magnetic core; and

a second inductor including a second magnetic core and a second coil wound around the second magnetic core;

wherein;

the first inductor and the second inductor are positioned so that a first angle between a first line and a fifth line is equal to or greater than 0 degrees and is equal to or less than 90 degrees,

the first line is in a same direction as a first magnetic flux generated by the first coil and passes through a center of the first coil in a width direction,

a second line is perpendicular to the first magnetic flux and passes through the center of the first coil in a length direction,

a first point is an intersection of the first line and the second line,

a third line is in a same direction as a second magnetic flux generated by the second coil and passes through a center of the second coil in the width direction,

a fourth line is perpendicular to the second magnetic flux and passes through the center of the second coil in the length direction,

a second point is an intersection of the third line and the fourth line,

the fifth line is a line which connects the first point and the second point, and

a cross section of the first coil in the width direction and a cross section of the second coil in the width direction overlap in at least a direction of the first magnetic flux or a direction of the second magnetic flux.

2. The inductor system according to claim 1, wherein the first inductor and the second inductor are positioned so that the first angle is equal to or greater than 50 degrees and is equal to or less than 70 degrees.

3. The inductor system according to claim 1, wherein the first inductor and the second inductor are approximately hexahedral shaped when viewed in plan view.

4. The inductor system according to claim 3, wherein a second angle which is an angle between the first line and a surface of the first inductor facing the second inductor, and a third angle which is an angle between the second line and a surface of the second inductor facing the first inductor, are approximately equal.

5. The inductor system according to claim 1, wherein a side of the first inductor which faces the second inductor and a side of the second inductor which faces the first inductor are shaped so that the first inductor and the second inductor fit with each other.

6. The inductor system according to claim 1, wherein a part of the first magnetic core and a part of the second magnetic core are positioned so that there is an overlap in a thickness direction, the thickness direction being perpendicular to the width direction and the length direction.

7. The inductor system according to claim 1, wherein vertices formed by edge lines of the first inductor and the second inductor have obtuse angles.

8. The inductor system according to claim 1, wherein the first inductor and the second inductor are approximately hexagonal shaped when viewed in plan view.

9. The inductor system according to claim 8, wherein jigs which fix the first inductor and the second inductor to a body are located so that an area occupied by the jig and the first inductor and an area occupied by the jig and the second inductor are both approximately rectangular shaped when viewed in plan view.

10. The inductor system according to claim 1, wherein:

a plurality of inductors including the first inductor and the second inductor surround a center point at intervals of approximately equal angles, and

the second inductor is an inductor which is located adjacent to the first inductor.

11. The inductor system according to claim 10, wherein the plurality of the inductors are approximately trapezoidal shaped, approximately pie shaped or approximately isosceles triangle shaped when viewed in plan view.

12. A non-contact power supply system comprising:

a plurality of the inductor systems according to claim 1,

wherein the inductor systems are positioned on a transmission side and a receiving side, respectively.

13. An electric vehicle comprising:

the inductor system according to claim 1,

wherein the inductor system is implemented on a body of the electric vehicle.

14. An inductor system comprising:

a plurality of plate-shaped inductors positioned coplanar to each other, the plurality of inductors surrounding a center point at intervals of approximately equal angles;

each of the inductors including a magnetic core and a coil wound around the magnetic core;

wherein the plurality of inductors are configured so that phase differences of currents provided to each of the inductors are equal to relative angles of the inductors observed from the center point.