Stator core unit for dynamoelectric machine
US4912350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jan 9, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An A.C. alternator includes laminated stator core with an tubular frame formed from a plate member which is wrapped tightly about the core and with the opposed end edges of the frame plate welded to the core. The stator laminations having a square perimeter with the corners rounded with a radius of the final core diameter. The corner portion are further provided with a control welding notch and a plurality of circumferentially distributed openings. The laminations are stacked in rotated relation to form the core with a true constant diameter. Each lamination is rotated in the same direction of rotation for 120 degrees relative to the adjacent laminations. The multiple openings in the corner portions are constructed and arranged such that the rotating laminations aligned the similar openings and define a plurality of unobstructed axial cooling passages. The laminations are rotated to establish skewed elongated slots, central notches and air flow openings. At least one of the corners is especially formed with two offset portions with a rigid bar welded to the inner recess and defines a frame connection surface. A weld bar is secured to the inner bar and outer recess in axial alignmen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.