Mitsubishi Denki Kabushiki Kaisha

Kei Yonemori

Toshinori Tanaka

Kyouhei Yamamoto

Kazuyuki Yamamoto

Akihiro Daikoku

Yusuke Matsui

Keiichi Fukazawa

A rotating electric machine armature core is configured by combining such a number of magnetic tooth sections that corresponds to the number of magnetic poles, each of the magnetic tooth sections including a plurality of first sheet members each of which includes a magnetic tooth portion formed at one end and a root portion formed at the other end with an end face of the root portion having a prescribed external shape, and at least one second sheet member inserted between the individual first sheet members in a laminating direction thereof at a location different from the locations of the other sheet members, the second sheet member including the magnetic tooth portion formed at one end and an overlapping portion formed at the other end, the overlapping portion forming a back yoke portion together with the root portion with a through hole formed at a specified position in the overlapping portion, the overlapping portion jutting out from the root portion in such a manner that the overlapping portion can fit on the end face of the root portion of the first sheet member, wherein the magnetic tooth sections are combined in a radial form with the through holes in the individual overlapping portions aligned at the same location.

Armature core of rotating electric machine

A rotating electric machine armature core () is configured by combining such a number of magnetic tooth sections () that corresponds to the number of magnetic poles, each of the magnetic tooth sections () including a plurality of first sheet members () each of which includes a magnetic tooth portion () formed at one end and a root portion () formed at the other end with an end face of the root portion () having a prescribed external shape, and at least one second sheet member () inserted between the individual first sheet members () in a laminating direction thereof at a location different from the locations of the other sheet members, the second sheet member () including the magnetic tooth portion () formed at one end and an overlapping portion () formed at the other end, the overlapping portion () forming a back yoke portion () together with the root portion () with a through hole () formed at a specified position in the overlapping portion (), the overlapping portion () jutting out from the root portion () in such a manner that the overlapping portion () can fit on the end face of the root portion () of the first sheet member (), wherein the magnetic tooth sections () are combined in a radial form with the through holes () in the individual overlapping portions () aligned at the same location.

An brush assembly is provided in which electric power losses in brushes are reduced, thereby suppressing an abnormal or excessive rise in temperature of the brushes. A tip end of a lead wire inserted into a corresponding brush in a direction of pressing upon press molding thereof is embedded in the brush in such a manner that it extends over two thirds or more of the length in the pressing direction of the brush

Brush assembly

The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, &ldquo;n&rdquo; is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.

Dynamo-electric machine

The present invention provides a dynamo-electric machine that suppresses vibrations caused by imbalance due to electromagnetic forces and that also suppresses imbalance in magnetic attraction forces generated owing to the difference in the number of coil portions among electric circuit portions. This dynamo-electric machine comprises an armature having a winding consisting of a plurality of coil portions each formed by lap-winding a conductor between a corresponding pair of slots formed in an outer circumferential surface portion of a core fixed to a shaft in such a way as to extend in an axial direction thereof, a commutator fixed to an end portion of the shaft and having a plurality of segments to which both end sections of said coil portions are electrically connected, brushes made to respectively abut against the surfaces of the segments of the commutator, and equalizers for connecting said segments, which are to be at equal electric potential, to each other. Moreover, the coil portions are parallel-connected to one another between the segments, and disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees.

Growing community of inventors

Tokyo, Japan

Kei Yonemori