Stator for electric rotating machine and manufacturing method of the same
a technology of rotating machine and stator, which is applied in the direction of manufacturing stator/rotor body, dynamo-electric machines, electrical apparatus, etc., can solve the problems of worse insulation failure and inability to ensure insulation properties
Inactive Publication Date: 2011-07-07
DENSO CORP
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
The patent text describes a stator for an electric rotating machine that has weld portions that are coated with an insulating material to prevent insulation failure under high voltage conditions. The stator has a stator core with slots and a stator winding with conductor segments that are welded together. The weld portions are annularly placed and coated with a resin material made of multiple layers of insulating films. The technical effect of this invention is to improve the reliability and durability of the stator under high voltage conditions.
Problems solved by technology
Use of such higher voltage raises a problem of not ensuring insulation properties in the resin material mentioned above for coating the weld portions of the stator.
In a high-voltage application environment, entry of an electrolytic solution, such as salt water or car shampoo, into the pin hole causes insulation failure which is worse than in the conventional voltage environment.
Method used
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Embodiment Construction
[0032]With reference to the accompanying drawings, hereinafter is described an embodiment. Throughout the drawings, components identical with or similar to each other are given the same numerals for the sake of omitting unnecessary explanation.
[0033]FIG. 1 is a cross-sectional view illustrating the general configuration of a vehicle alternator 1 as a vehicular electric rotating machine, according to the embodiment. As shown in FIG. 1, the vehicle alternator 1 includes a stator 2, a rotor 3, a frame 4 and a rectifier 5. The stator 2 includes a stator core 32, a plurality of conductor segments 33, an insulator 34 and a resin material 36. The plurality of segments 33 configure a stator winding. The insulator 34 electrically insulates between the stator core 32 and the conductor segments 33. The resin material 36 is formed in an annular shape, being imparted with insulation properties, to establish connection between weld portions at the tip ends of the respective conductor segments 33....
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Abstract
A stator for an electric rotating machine includes a stator core which has a plurality of slots and a stator winding which is provided at the stator core. The stator winding has a plurality of conductor segments each of which includes an inner conducting body accommodated in the slot of the stator core and coil ends exposed from the slot, and weld portions which are connected with each other by welding the conductor segments at least one of the coil ends. The weld portions are annularly disposed with an interval therebetween. The weld portions are coated with an insulating resin material. The resin material is formed of a plurality of layered insulating films.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is based on and claims the benefit of priority from earlier Japanese Patent Application No. 2010-2148 filed Jan. 7, 2010, the description of which is incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention generally relates to a stator for an electric rotating machine, such as an alternator or a motor-generator, installed in a vehicle, such as an electric vehicle or a hybrid vehicle, and to a manufacturing method of the stator.[0004]2. Related Art[0005]A stator for a vehicular electric rotating machine generally includes a stator core disposed opposed to a rotor and a stator winding provided at the stator core, as disclosed in JP-A-2001-204151. The stator winding in such a stator is made up of a plurality of conductor segments each having an inner conducting body accommodated in a slot of the stator core and coil end portions axially exposed from the slot and extended in both circumfe...
Claims
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IPC IPC(8): H02K3/28H02K15/02
CPCH02K3/38H02K15/0081H02K15/12Y10T29/49009H02K3/04Y10T29/4902Y10T29/49073H02K3/12
Inventor NAKAMURA, SHIGENOBU
Owner DENSO CORP