Direct-current micromotor
US4136294A · kind A · utility
6Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1977 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Mar 1, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct-current micromotor is disclosed which comprises a rotor bearing a motor winding, the rotor being arranged for rotation between a core part and a mantle part of a stator structure. The core part comprises a permanent magnet and the mantle part is made of magnetically conductive material. The motor winding is fed through a commutator comprising a collector and associated brushes. At least a part of the surfaces of the stator facing the rotor winding are provided with an electrically conductive coating to reduce the height of the voltage peaks occuring during the commutation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.