Gear motor including a compact multiple-phase electric motor
US8339003B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2008 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | May 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2211/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a gear motor including a multiple-phase electric motor formed by a stator portion excited by electric coils and by a rotor having N pairs of poles radially magnetised in alternating directions, the stator portion including two angular sectors alpha-1 and alpha-2 with respective radii R1 and R2, and wide teeth and narrow teeth radially extending from an annular crown, characterized in that the wide teeth have a width higher than or equal to twice the width of the narrow teeth, in that the notch width is higher than the width of a narrow tooth, in that the angular sector alpha-1 is lower than 220° and includes all the coils, and in that the ratio R1/R2 ranges from 1.2 to 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.