Armature winding of electrical rotating apparatus, electrical rotating apparatus using the same, and method of manufacturing the same

• US 9,705,370 B2
• Filed: 11/21/2014
• Issued: 07/11/2017
• 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
• Primary Examiner(s): NGUYEN, TRAN N
• Application Number:
  US14/549,782
• Publication Number:
  US 20150171687A1
• Time in Patent Office: 963 Days
• Field of Search: 29596, 29598, 2960325, 310 52, 310 54, 310201, 3102541, 2281791, 228183, 228215, 228245
• 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 tips of end portions thereof form one surface which corresponds to a wire-tip end face;

a brazing filler material covering the wire-tip end face; and

an anti-flowing agent adhering to a part of an inner surface of each hollow conductor in a region at a predetermined distance from the wire-tip end face so as not to be applied to the wire-tip end face 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 contains an inorganic material, and also contains an organic material and water as binders.

3. 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.

4. The winding according to claim 1, wherein the wire-tip end face is further coated with a ceramic material by thermal spraying after being coated with the brazing filler material.

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

6. 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 tips of end portions thereof form one surface which corresponds to a wire-tip end face;

applying an anti-flowing agent on a part of an inner surface of each hollow conductor in a region at a predetermined distance from the wire-tip end face so as not to be applied to the wire-tip end face to prevent a brazing filler material from flowing into hollow portions of the hollow conductors; and

coating the wire-tip end face with the brazing filler material by heating the clip.

7. The method according to claim 6, wherein the anti-flowing agent contains an inorganic material, and also contains an organic material and water as binders.

8. The method according to claim 6, 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.

9. The method according to claim 6, further comprising, after the coating of the wire-tip end face with the brazing filler material, further coating the wire-tip end face with a ceramic material by thermal spraying.