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:
Apr. 11, 2000
Filed:
Aug. 18, 1998
Yoshihito Asao, Tokyo, JP;
Ryoichi Taji, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The stator includes a stator core having a plurality of slots; and a plurality of windings composed of coil units formed by winding coil strands a certain number of times and having a plurality of straight portions and coil end portions joining the ends of adjacent straight portions, the windings being incorporated into the stator core by inserting the plurality of straight portions into the slots in sequence at intervals of a certain number of slots and allowing the coil end portions to protrude axially outward from the ends of the stator core. Each coil strand has a coil shape composed such that after coming out of a slot, the strand extends in one direction around the circumference so as to be pointed axially outward and away from the end of the stator core, then doubles back towards the radially inner edge, extends in the one direction around the circumference so as to approach the end of the stator core, and enters a slot three slots away from the slot out of which the core strand came in the one direction around the circumference, and the strands are arranged so as to overlap around the circumference at the turn around portion of the coil shape and its vicinity.