Four phase stepping motor and art of driving same
US5270597A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1993 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Feb 10, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The stepping motor has 16 stoppable points of a rotor to be driven by a stator controlled by a drive control unit which is connected to one DC source, wherein the stator comprises four (4) phase coils: an A phase coil and an inverse A phase coil, and a B phase coil and an inverse B coil, and each coil has a first terminal at a first end and a second terminal at a second end, and a first stator pole is wound with the A phase coil and the inverse A coil and a second pole is wound with the B phase coil and the inverse B coil, and these poles are disposed alternately to surround the rotor and activated to generate torque for rotating the rotor with stoppable motion at 16 points during one encircling, wherein the drive unit sequentially shifts the DC current in direction and amount to produce, at the rotor, composite torque vectors having revolutional loci.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.