Power conversion device for railway vehicle

Patent metadata

Field	Value
Publication number	US-10470343-B2
Application number	US-201715468220-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Apr 28, 2016
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

This power conversion device for a railway vehicle includes a first radiation fin radiating heat from a semiconductor device and a second radiation fin arranged at a prescribed interval from the first radiation fin in a traveling direction for radiating heat from the semiconductor device. At least either one of the first and second radiation fins includes an air duct formed by partially not providing a plurality of fin portions.

First claim

What is claimed is:

1. A power conversion device for a railway vehicle defining a travel axis which includes first and second travel directions opposed to each other, comprising:
a first radiation fin unit having a plurality of fin portions provided to extend along said travel axis of the railway vehicle for radiating heat from a body of the power conversion device loaded on the railway vehicle; and
a second radiation fin unit, arranged at a prescribed interval from the first radiation fin unit along the travel axis, having a plurality of fin portions provided to extend along the travel axis for radiating heat from the body of the power conversion device,
wherein the first radiation fin unit and the second radiation fin unit include a first air duct and second air ducts respectively, extending along the travel axis, formed by partially not providing the plurality of fin portions, for supplying a part of air taken from an end portion of either the first radiation fin unit or the second radiation fin unit depending upon the traveling direction of the vehicle, and circulated through the first air duct or the second air ducts to be discharged to the end portion of either the second radiation fin unit or the first radiation fin unit depending upon the traveling direction of the vehicle, and
outer end faces of the first radiation fin unit and the second radiation fin unit in a direction orthogonal to the travel axis are exposed in a side direction of the first radiation fin unit and the second radiation fin unit which is the direction orthogonal to the travel axis.

2. The power conversion device for a railway vehicle according to claim 1 , wherein the second air ducts are provided on positions of the second radiation fin unit different from the first air duct in the direction orthogonal to the travel axis,
the second radiation fin unit is provided with the plurality of fin portions on a position opposed to the first air duct in a direction a direction along the travel axis, and
the first radiation fin unit is provided with the plurality of fin portions on positions opposed to the second air ducts in the direction along the travel axis.

3. The power conversion device for a railway vehicle according to claim 2 , wherein the first air duct is provided on a central region of the first radiation fin unit in the direction orthogonal to the travel axis, and
air circulated through the first air duct to be discharged is supplied to end portions of the plurality of fin portions provided on a position corresponding to a central region of the second radiation fin unit in the direction orthogonal to the travel axis while air circulated through the plurality of fin portions other than the first air duct to be discharged is circulated through the second air ducts of the second radiation fin unit and discharged when the railway vehicle travels in the first travel direction wherein the first radiation fin unit is located at a forefront.

4. The power conversion device for a railway vehicle according to claim 2 , wherein a range of formation of the plurality of fin portions of the second radiation fin unit provided on the position opposed to the first air duct in the direction orthogonal to the travel axis is broader than a width of the first air duct in the direction orthogonal to the travel axis, and
a range of formation of the plurality of fin portions of the first radiation fin unit provided on the positions opposed to the second air ducts in the direction orthogonal to the travel axis is broader than the width of the first air duct in the direction orthogonal to the travel axis.

5. The power conversion device for a railway vehicle according to claim 2 , wherein a width of the first air duct along the direction orthogonal to the travel axis is smaller than a range of formation of the plurality of fin portions other than the first air duct in the first radiation fin unit.

6. The power conversion device for a railway vehicle according to claim 2 , wherein the second air ducts are provided on sides of the outer end faces of the second radiation fin unit in the direction orthogonal to the travel axis.

7. The power conversion device for a railway vehicle according to claim 6 , wherein the second air ducts include two air ducts which are provided on regions close to both the outer end faces of the second radiation fin unit in the direction orthogonal to the travel axis.

8. The power conversion device for a railway vehicle according to claim 6 , wherein air taken from a side end portion of the second radiation fin unit in the direction along the travel axis is supplied to the plurality of fin portions provided on side portions beyond the second air ducts when the railway vehicle travels in the first travel direction wherein the first radiation fin unit is located at a forefront.

9. The power conversion device for a railway vehicle according to claim 1 , further comprising a heat pipe provided within a connection region of at least either one of the first radiation fin unit and the second radiation fin unit, including the first air duct and the second air ducts, with the body of the power conversion device to extend in the direction orthogonal to the travel axis over a region of formation of the plurality of fin portions and a region of formation of the first air duct or the second air ducts.

10. The power conversion device for a railway vehicle according to claim 1 , further comprising a wind guide member provided on a region between the first radiation fin unit and the second radiation fin unit for guiding a part of air taken from the end portion of either the first radiation fin unit or the second radiation fin unit depending upon the traveling direction of the vehicle and circulated through the first air duct or the second air ducts to be discharged to the plurality of fin portions on the end portion of either the second radiation fin unit or the first radiation fin unit depending upon the traveling direction of the vehicle.

11. The power conversion device for a railway vehicle according to claim 10 , wherein the wind guide member connects an outlet of the first air duct or each of the second air ducts with end portions of the plurality of fin portions provided on a position opposed to the first air duct or each of the second air ducts in the direction along the travel axis on the region between the first radiation fin unit and the second radiation fin unit.

12. The power conversion device for a railway vehicle according to claim 10 , wherein the wind guide member includes a wind guide wall extending outward beyond forward end portions of the plurality of fin portions of each of the first radiation fin unit and the second radiation fin unit in the direction orthogonal to the travel axis.

13. The power conversion device for a railway vehicle according to claim 12 , wherein the wind guide member further includes a bottom surface connecting outer end portions of a pair of the wind guide walls, and
the bottom surface is inclined to approach toward a position corresponding to end portions of the plurality of fin portions provided on the position opposed to the first air duct or each of the second air ducts in the direction along the travel axis from a position outward beyond an outlet of the first air duct or each of the second air ducts in the direction orthogonal to the travel axis on the region.

14. The power conversion device for a railway vehicle according to claim 4 , further comprising a wind guide member provided on a region between the first radiation fin unit and the second radiation fin unit for guiding a part of air taken from the end portion of either the first

Assignees

• Fuji Electric Co Ltd

Inventors

• Shibata Misato
• Kaneko Kimihisa
• Uehara Yoshihisa

Classifications

• B61F1/00

  Underframes (making railway vehicle underframes by forging or pressing B21K7/12) · CPC title

• B61C17/00 Primary

  Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems · CPC title

• H05K7/20918

  the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels · CPC title

• H05K7/20854 Primary

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20863 takes precedence) · CPC title

• H05K7/20863

  Forced ventilation, e.g. on heat dissipaters coupled to components · CPC title