Motor using permanent magnet
US6960858B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 2004 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | May 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor which uses a permanent magnet is provided in which output thrust is improved by increasing a magnetic saturation limit and preventing reduction in magnetic flux and generation of heat is reduced by inhibiting generation of an eddy current in a magnetic pole. An N magnetic pole is formed such that its width increases as the distance from a stator increases on a side of an N pole magnetic yoke and an S magnetic pole is formed such that its width increases as the distance from the stator increases on a side of an S pole magnetic yoke. With this structure, a saturation limit of magnetic flux at an entrance of yoke which is a connection section between the N magnetic pole and the N pole magnetic yoke is increased and motor thrust is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.