ARMATURE WINDING OF ELECTRICAL ROTATING APPARATUS, ELECTRICAL ROTATING APPARATUS USING THE SAME, AND METHOD OF MANUFACTURING THE SAME

• US 20150171687A1
• Filed: 11/21/2014
• Published: 06/18/2015
• Est. Priority Date: 12/17/2013
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KOYAMA, Mitsuhiko, OTAKA, Toru, ISHII, Shigehito, SAKAI, Yoshitaka
• Granted Patent: US 9,705,370 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 1/20 Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating preparation of surfaces in particular ways, see the relevant classes for the treatments or the materials treated, e.g. C04B, C23C
• CPC Class Codes: B23K 2101/38 Conductors
• CPC Class Codes: H02K 15/0093 Manufacturing or repairing cooling fluid boxes, i.e. terminals of fluid cooled windings ensuring both electrical and fluid connection
• CPC Class Codes: H02K 15/0414 Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors

Abstract

According to one embodiment, an armature winding includes a plurality of rectangular solid conductors and a plurality of rectangular hollow conductors, which are arranged such that tip of end portions thereof form one surface, the surface being coated with a brazing filler material, and an anti-flowing agent applied on a portion of an inner surface of each hollow conductor to prevent the brazing filler material from flowing into hollow portions of the hollow conductors.

Claims

1. An armature winding comprising:

a plurality of rectangular solid conductors and a plurality of rectangular hollow conductors, which are arranged such that tip of end portions thereof form one surface, the surface being coated with a brazing filler material; and

an anti-flowing agent applied on a portion of an inner surface of each hollow conductor to prevent the brazing filler material from flowing into hollow portions of the hollow conductors.

2. The winding according to claim 1, wherein the anti-flowing agent is applied from a hole end of each hollow conductor to an inner portion at a predetermined distance of the inner surface of the hollow conductor.

3. The winding according to claim 1, wherein the anti-flowing agent contains an inorganic material, and also contains an organic material and water as binders.

4. The winding according to claim 1, wherein the anti-flowing agent has a property that the water and the organic material evaporate and disappear by vaporization during a heating process of a brazing work, and the inorganic material remains by adhering to the inner surface of each hollow conductor.

5. The winding according to claim 1, wherein the surface is further coated with a ceramic material by thermal spraying after being coated with the brazing filler material.

6. An electrical rotating apparatus comprising an armature winding according to claim 1.

7. A method of manufacturing an armature winding, comprising:

arranging, inside a clip, a plurality of rectangular solid conductors and a plurality of rectangular hollow conductors such that tip of end portions thereof form one surface;

applying an anti-flowing agent on a portion of an inner surface of each hollow conductor to prevent a brazing filler material from flowing into hollow portions of the hollow conductors; and

coating the tip of end portions of the solid conductors and hollow conductors with the brazing filler material by heating the clip.

8. The method according to claim 7, wherein applying the anti-flowing agent comprises applying the anti-flowing agent from a hole end of each hollow conductor to an inner portion at a predetermined distance of the inner surface of the hollow conductor.

9. The method according to claim 7, wherein the anti-flowing agent contains an inorganic material, and also contains an organic material and water as binders.

10. The method according to claim 7, wherein the anti-flowing agent has a property that the water and the organic material evaporate and disappear by vaporization during a heating process of a brazing work, and the inorganic material remains by adhering to the inner surface of each hollow conductor.

11. The method according to claim 7, further comprising, after the coating of the surface with the brazing filler material, further coating the surface with a ceramic material by thermal spraying.