The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2017
Filed:
Jan. 14, 2015
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A static apparatus is provided in which a partial discharge, if occurred in a winding end portion, is unlikely to lead to insulation breakdown. The windings and core of a static apparatus are housed in a tank filled with coolant. The winding is fixed by upper and lower parts supporting winding. A continuous coolant duct is formed in a section embracing the winding and the upper and lower parts supporting winding. A coolant duct from the wiring, extending through the upper or lower parts supporting winding and connected with the coolant space is configured in a structure in which toroidal ducts in multiple tiers are connected in a vertical direction of the winding. Connecting holes of one toroidal duct and of its next toroidal duct are staggered with respect to each other and spaced at intervals which are longer than the width of the toroidal ducts.