Air-core reactor for vehicle

Patent metadata

Field	Value
Publication number	US-11621120-B2
Application number	US-201716625965-A
Country	US
Kind code	B2
Filing date	Jul 3, 2017
Priority date	Jul 3, 2017
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A reactor includes a coil that has unit coils. Spacers are disposed in (i) at least one of spaces between the unit coils adjacent to each other in the central axis direction and (ii) a space between each of the support frames and the unit coil. Bolts penetrate the support frame and the spacers, and the spacers are fixed to the bolts The bolts include fitting portions to be fitted to one of the spacers on a notch or a through hole formed in a projection part of the spacer.

First claim

The invention claimed is:

1. An air-core reactor for a vehicle comprising:
a coil having unit coils wound around a central axis that is horizontal, the unit coils being adjacent to each other with a space therebetween in a central axis direction that is a direction of the central axis;
a pair of support frames facing each other in the central axis direction with the coil sandwiched between the pair of support frames;
spacers disposed in (i) at least one of spaces between the unit coils adjacent to each other in the central axis direction and (ii) a space between each of the support frames and the coil, the spacers having projection parts that project outwardly from an outer peripheral face of the coil around the central axis, each of the projection parts having a notch or a through hole that penetrates the corresponding projection part in the central axis direction;
bolts passing through the notches or the through holes in the projection parts of the spacers and penetrating the pair of support frames;
fastening members fastened to the bolts to sandwich the pair of support frames so that the pair of support frames and the spacers are fixed to the bolts; and
an insulating support member to vertically support the coil by abutting on the outer peripheral face of the coil or on an inner peripheral face of the coil around the central axis,
wherein each of the bolts comprises fitting portions fitted to the spacers on the notches or the through holes in the projection parts of the spacers,
each of the bolts includes a plurality of fixing portions, each of the fixing portions adjacent to at least one of the fitting portions, each spacer being inhibited from deviating in the central axis direction with respect to the bolts by a respective adjacent fixing portion,
each of the spacers is disposed between the unit coils adjacent to each other, and
a length of the fixing portion along the central axis direction is greater than a length along the central axis direction of the unit coil positioned between the fitting portions adjacent to the fixing portion when the coil is energized.

2. The air-core reactor according to claim 1 , wherein the projection part has the notch extending in a vertical direction.

3. The air-core reactor according to claim 1 , wherein the projection part has the notch extending in a direction perpendicular to the central axis and to a vertical direction.

4. The air-core reactor according to claim 1 , comprising:
a plurality of pairs of the spacers opposing each other in a horizontal direction on opposite sides of the central axis and extending in a vertical direction,
wherein both ends of each of the spacers in the vertical direction each have the projection part.

5. The air-core reactor according to claim 1 , wherein both ends of the support member are fixed to the pair of support frames, and the support member vertically supports the coil by abutting on the inner peripheral face of the coil and being fixed to the coil.

6. The air-core reactor according to claim 1 , wherein a length along the central axis direction of each spacer disposed between the unit coils adjacent to each other and a length along the central axis direction of the fitting portion fitted to the respective spacer are determined in accordance with a distance from the pair of support frames to the spacer.

7. The air-core reactor according to claim 6 , wherein the length along the central axis direction of each spacer disposed between the unit coils adjacent to each other and the length along the central axis direction of the fitting portion fitted to the respective spacer become greater as a difference between distances from the pair of support frames to each spacer becomes smaller.

8. An air-core reactor for a vehicle comprising:
a coil having unit coils wound around a central axis that is horizontal, the unit coils being adjacent to each other with a space therebetween in a central axis direction that is a direction of the central axis;
a pair of support frames facing each other in the central axis direction with the coil sandwiched between the pair of support frames;
spacers disposed in (i) at least one of spaces between the unit coils adjacent to each other in the central axis direction and (ii) a space between each of the support frames and the coil, the spacers having projection parts that project outwardly from an outer peripheral face of the coil around the central axis, each of the projection parts having a notch or a through hole that penetrates the corresponding projection part in the central axis direction;
bolts passing through the notches or the through holes in the projection parts of the spacers and penetrating the pair of support frames;
fastening members fastened to the bolts to sandwich the pair of support frames so that the pair of support frames and the spacers are fixed to the bolts; and
an insulating support member to vertically support the coil by abutting on the outer peripheral face of the coil or on an inner peripheral face of the coil around the central axis,
wherein each of the bolts comprises fitting portions fitted to the spacers on the notches or the through holes in the projection parts of the spacers, and each of the spacers having the through hole comprises:
a plate-shaped first member; and
a pair of second members each having the notch penetrating the second member in the central axis direction and extending in a vertical direction, the pair of second members being configured to be attached to the first member at both ends of the first member by the notch facing a corresponding one of the ends in the vertical direction.

9. The air-core reactor according to claim 8 , wherein each of the bolts further comprises a fixing portion adjacent to at least one of the fitting portions, the fixing portion being configured to inhibit a spacer fitted to the adjacent fitting portion from deviating in the central axis direction with respect to the bolts, the spacer being included in the spacers.

10. The air-core reactor according to claim 9 , wherein each through hole is formed by overlapping a portion of a first through hole into which the fixing portion is insertable and a portion of a second through hole into which the fitting portion is insertable but the fixing portion is not insertable.

11. The air-core reactor according to claim 10 , wherein the fixing portion adjacent to the fitting portion to be fitted to the projection part formed by a vertically lower end of each of the spacers serves as the support member that is formed as an insulating member and vertically supports the coil by abutting on the outer peripheral face of the coil.

12. The air-core reactor according to claim 8 , comprising:
a plurality of pairs of the spacers opposing each other in a horizontal direction on opposite sides of the central axis and extending in a vertical direction,
wherein both ends of each of the spacers in the vertical direction each have the projection part.

13. The air-core reactor according to claim 8 , wherein both ends of the support member are fixed to the pair of support frames, and the support member vertically supports the coil by abutting on the inner peripheral face of the coil and being fixed to the coil.

14. An air-core reactor for a vehicle comprising:
a coil having unit coils wound around a central axis that is horizontal, the unit coils being adjacent to each other with a space therebetween in a central axis direction that is a direction of the central axis;
a pair of support frames facing each other in the central axis direction with the coil sandwiched between the pair of support frames;
spacers disposed in

Assignees

• Mitsubishi Electric Corp

Inventors

• Ishimori Yuki
• Sakurada Tetsuya

Classifications

• H01F27/085

  Cooling by ambient air · CPC title

• H01F37/00

  Fixed inductances not covered by group H01F17/00 · CPC title

• H01F27/30

  Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support · CPC title

• H01F37/005

  without magnetic core · CPC title

• H01F27/306 Primary

  Fastening or mounting coils or windings on core, casing or other support · CPC title