Claw-pole permanent magnet stepping motor
US7205697B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2006 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A claw-pole PM stepping motor includes a module that is formed in such a manner that a first driving unit and a second driving unit are symmetrically arranged with respect to a first claw-pole and a second claw-pole each oppositely disposed at a main yoke member internally disposed to substantially divide an inside of a housing, an inner portion of which is rotatably inserted and supported by a rotary shaft, and the first driving unit and the second driving unit have magnet rotors coaxially arranged to generate electromagnetic force; sub-yoke members; and coil bobbins. The claw-pole PM stepping motor is exempted from a structure where coil bobbins are concentrically arranged at a periphery of magnet rotors, and instead the coil bobbins are coaxially arranged and shifted from each other from the corresponding magnet rotors, such that a miniaturized motor with a reduced outer diameter can be embodied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.