Rotary armature and method of forming armature coil
US5587619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A central conductor portion of a coil is formed with a potbelly-shaped cross-sectional form and a flat-shaped face of an insulated coating film of the potbelly-shaped cross-sectional form coil is made thinner than an arc-shaped face of the insulated coating film of the potbelly-shaped cross-sectional form coil. An insulated coating wire having a circular-shaped cross-sectional form is formed to a coil having a potbelly-shaped cross-sectional form by rolling process at a normal temperature. A dead space in a slot is lessened and the magnetic resistance of a magnetic core is decreased, thereby a small size and a high output electric motor can be obtained. A method of forming a rotary armature coil having a high space factor in the slot can be attained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.