Glass compound layer for mechanical and thermal protection of a laminated iron core rotary electromachine

• US 4,227,108 A
• Filed: 04/24/1978
• Issued: 10/07/1980
• Est. Priority Date: 04/24/1978
• Status: Expired due to Term

• Current Assignee: Tokyo Shibaura Electric Co., Ltd.
• Original Assignee: Tokyo Shibaura Electric Co., Ltd.
• Inventors: Goto, Eizo, Washizu, Teruo
• Primary Examiner(s): Budd, Mark O.
• Application Number:
  US05/899,459
• Time in Patent Office: 897 Days
• Field of Search: 310/42, 310/45, 310/214, 310/216, 310/217, 310/52, 310/59, 310/64, 310/65, 310/87, 310/88, 310/254, 310/258, 310/259, 310/261
• US Class Current: 310/214
• CPC Class Codes: H02K 1/04 characterised by the material used for insulating the magnetic circuit or parts thereof
• CPC Class Codes: H02K 3/487 Slot-closing devices
• CPC Class Codes: H02K 5/128 using air-gap sleeves or air-gap discs

Abstract

A laminated iron core for rotary electromachines comprises a plurality of metallic plates laminated on each other, a glass layer disposed between opposed side surfaces of each pair of the contiguous metallic plates to hermetically bond the latter together, and an aggregate-containing glass compound layer disposed on at least a portion of the end faces of the laminar metallic plates which is likely to be subject to a thermal/mechanical impact during use in rotary electro-machines.

Claims

1. A laminated iron core for rotary electromachines comprises a plurality of laminar metallic plates laid on each other, a glass layer disposed between each pair of the contiguous metallic plates to bond one to another, and a glass-compound layer means consisting essentially of glass and aggregates bonded in said glass and formed on end faces of the laminar metallic plates, for providing thermal resistance as well as mechanical impact protection.

2. The laminated iron core for rotary electromachines defined in claim 1 where said glass-compound layer contains aggregates selected from the group consisting of magnesia particles, alumina particles, ceramic particles and copper particles.

3. A laminated stator iron core for rotary electromachines which is hermetically disposed in a stator frame having an interior for flowing a coolant fluid and arranged adjacent a rotor, comprising a plurality of laminar metallic plates, means for bonding said plurality of metallic plates into a laminated assembly in said stator frame, with an air-gap surface formed relative to said rotor, and glass-compound means consisting essentially of glass and aggregates bonded in said glass and disposed at least on said air-gap surface for hermetically sealing said laminated assembly on said air-gap surface from the side of said stator and for providing thermal resistance and mechanical impact protection.

4. A laminated stator iron core for rotary electromachines which is hermetically disposed in a stator frame having an interior for flowing a coolant fluid and arranged adjacent a rotor, comprising a plurality of laminar metallic plates, means for bonding said plurality of metallic plates into a laminated assembly, means for hermetically disposing said laminated assembly in said stator frame, with an air-gap surface formed relative to said rotor, a plurality of slots formed in the laminated assembly each to have an opening, a plurality of coil conductors extending through each of said plurality of slots, with spaces left to define a passageway for said coolant fluid, and glass compound filler means for closing the openings of said slots, said glass compound filler means consisting essentially of glass and aggregates bonded in said glass, for providing thermal resistance as well as mechanical impact protection.

5. The laminated stator iron core defined in claim 4 and further including glass compound means disposed at least on said air-gap surface, said glass compound means consisting essentially of glass and aggregates bonded in said glass.