Hybrid type stepping motor
US5410200A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Aug 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hybrid stepping motor in which each of two rotor yokes constituting a rotor is divided in its axial direction into at least two rotor yoke portions, the rotor yoke portions constituting one rotor yoke being made to abut on each other with their pole teeth shifted from each other in angular position by .theta..sub.0, the two rotor yoke portions belonging to the two rotor yokes respectively and sandwiching a permanent magnet therebetween being arranged with their pole teeth shifted from each other in angular position by 180/Nr degrees (.pi. radian in electric angle) under the condition that a relation of 0<.theta..sub.0 <90/Nr degrees is satisfied, and a rotor of a hybrid stepping motor in which two or more rotor units are arranged with their pole teeth shifted from each other in angular position by an angle smaller than 1/4 of the angular pitch with which the pole teeth are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.