Rotary electric motor having at least two axially air gaps separating stator and rotor segments
US6791222B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Sep 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor has a rotor and a stator. The stator is made up of a plurality of separate electromagnet core segments disposed coaxially about an axis of rotation. The core segments are affixed, without ferromagnetic contact with each other, to a non-ferromagnetic support structure. The rotor is configured in an annular ring that at least partially surrounds the annular stator to define two parallel axial air gaps between the rotor and stator respectively on opposite axial sides of the stator. Permanent magnets are distributed on each side of the rotor annular ring that faces an air gap. Preferably, each stator electromagnet core segment has a pair of poles aligned in a direction generally parallel to the axis of rotation with pole faces generally perpendicular to the axis of rotation. A winding is formed on a core portion that links the poles to produce, when energized, magnetic poles of opposite polarity at the pole faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.