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. 05, 2001
Filed:
Nov. 18, 1999
Hideaki Mori, Chiyoda-machi, JP;
Shigeo Amagi, Tokai-mura, JP;
Saburo Usami, Hitachi, JP;
Tadashi Sonobe, Iwaki, JP;
Yasuomi Yagi, Hitachi, JP;
Tomoya Tsunoda, Hitachi, JP;
Mitsuru Onoda, Takahagi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An the electric rotating machine which is compact and of reduced cost by improving the thermal conductivity of the main insulation in the thickness direction while maintaining the insulation breakdown voltage of the main insulation high. The initial breakdown voltage V in the thickness direction of the main insulator 30 of the stator winding 3 is higher than 20 kV/mm, and the thermal conductivity &lgr; in the thickness direction is within a range of 0.35 to 1 W/m·K, and the product V&lgr; of the initial breakdown voltage V and the thermal conductivity &lgr; satisfies a relationship of 7≦V&lgr;≦20 (MWA/m,·K). The amount of resin is within a range of 20 to 50 weight % of the main insulation material.