Motor
US6255749A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes a magnet formed in a cylindrical shape and divided in the circumferential direction in at least the outer periphery and alternately polarized to different poles, a first coil, a magnet and a second coil placed in the axial direction of the magnet, a first outer magnetic pole opposed to the outer periphery of the magnet and a hollow-shaped first inner magnetic pole opposed to the inner periphery of the magnet, excited by the first coil respectively, a second outer magnetic pole opposed to the outer periphery of the magnet and a hollow-shaped second inner magnetic pole opposed to the inner periphery of the magnet, excited by the second coil respectively, a rotatable rotary shaft integral with the magnet, and a pressurizing device for pressurizing the rotary shaft in the axial direction, the pressurizing device being placed in the hollow cylindrical portion of the first inner magnetic pole. A motor having a high output, a compact shape and small working noises is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.