Double rotor stepping motor
US9318941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Dec 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In precision mechanical actuators, wherein a high precision stepping motor can notably be used in the actuating mechanisms of artificial satellites, a stepping motor comprises two rotors that rotate in opposite directions to generate a low-amplitude movement between one of the rotors and a stator. The first rotor comprises a first set of teeth distributed at a first pitch p1 and a second set of teeth distributed at a second pitch p2. The stator comprises N stator contacts comprising a plurality a of teeth distributed at the pitch p1, distributed at a third pitch equal to p1(a+1/N), and able to cooperate with the teeth of the first set. The second rotor comprises N rotor contacts comprising a plurality b of teeth distributed at the pitch p2, distributed at a fourth pitch equal to p1(b+1/N), and able to cooperate with the teeth of the second set of the first rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.