Commutator-less direct-current motor
US6066910A · kind A · utility
3Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1999 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Mar 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct-current motor has a single coil having a plurality of active branches and a rotor having a permanent magnet. The active branches are arranged in sequence essentially without gaps. The permanent magnet has magnetic segments which overlap all the active branches. The number of magnetic poles is at least equal to the number of active branches. As a result of the magnetic overlap of the coil and the permanent magnet, a greater efficiency is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.