Low-cost bobbin-wound stator construction for small, single-phase AC motors
US5780951A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bobbin-wound stator for small single-phase AC motors that surmounts magnetic compromises required by previous implementations is fabricated of stacked two-piece laminations and a split winding bobbin fitted about a first one of the lamination piece stacks that permits bobbin winding of a single coil about the pole neck of a magnetic yoke having pole shoes magnetically coupled to each other, but not in direct contact with each other, at a predetermined clearance distance chosen to balance rotor-to-armature flux linkage, armature inductance, and reluctance torque. The second lamination piece stack is pressed into the first lamination piece stack supporting the bobbin-wound coil to complete the stator. The stator is usable in several single-phase AC motors, including electronically commutated motors, chaotically-starting permanent magnet motors, and shaded-pole induction motors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.