Direct current motor
US4404485A · kind A · utility
Inventors
Key dates
| Filing date | Jun 15, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Jun 15, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current motor comprising a field magnet provided with 2n magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where n is an integer of 1 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; a plurality of armature coils in such a manner that the angular intervals of the electrically conductive portions thereof, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet; electric power supply control device to which the terminals of the armature coils are connected; short-circuit members for short-circuiting the winding initiation terminals of predetermined armature coils and the winding end terminals of other predetermined armature coils through the electric power supply control device; an armature comprising armature coils in the first series and armature coils in the second series through which the short-circuit members and the plurality of armature coils are connected in parallel to the positive pole and negative pole of a DC power source, the armature positioned so as to face the field magne…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.