POWER CONVERSION DEVICE FOR RAIL CARS AND RAIL CAR EQUIPPED WITH POWER CONVERSION DEVICE

Title:

POWER CONVERSION DEVICE FOR RAIL CARS AND RAIL CAR EQUIPPED WITH POWER CONVERSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/049405

Kind Code:

A1

Abstract:

Provided is a highly-reliable cooling structure for a power conversion device for rail cars which uses a self-oscillating heat pipe for cooling, wherein a decrease in cooling performance due to impact by a flying object or the like is avoided. Accordingly, this power conversion device for rail cars is composed of a plurality of power semiconductor elements and comprises a self-oscillating heat pipe which cools the power semiconductor elements. The self-oscillating heat pipe is, for example, structured such that the interior of a heat sink member exposed to a cooling airflow has sealed flow paths wherein a working fluid is sealed. The thickness of end partition walls of the self-oscillating heat pipe, each of which is in contact with an airflow inlet portion or an outlet portion, is greater than the thickness of an internal partition wall separating the flow paths.

Inventors:

FUNAKOSHI SUNAO (JP)
YASUDA YOSUKE (JP)
NISHIHARA ATSUO (JP)
TERAKADO SHUICHI (JP)
HORIUCHI KEISUKE (JP)
HATA KUNIHIKO (JP)

Application Number:

PCT/JP2018/012293

Publication Date:

March 14, 2019

Filing Date:

March 27, 2018

Export Citation:

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Assignee:

HITACHI LTD (JP)

International Classes:

F28D15/02; B61C17/00; H01L23/427; H02M7/48; H05K7/20

Domestic Patent References:

WO2016110977A1

2016-07-14

Foreign References:

JP2004229500A	2004-08-12
JP2014008852A	2014-01-20
JP2011050166A	2011-03-10
JP2015172474A	2015-10-01
US20130133871A1	2013-05-30
JP2018088744A	2018-06-07
JP2011050166A	2011-03-10
JP2006080471A	2006-03-23

Other References: