Encoder and method of adjusting magnetic fields of the same
US4899145A · kind A · utility
16Cited by
2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1986 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jun 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/301
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A rotary encoder comprises a rotator having ring-shaped multipole magnet and stator having magnetic field detecting sensors concentrically provided with the ring-shaped multipole magnet. The stator is provided with a plurality of zero-magnetostrictive amorphous ferromagnetic cores arrayed in correspondence to the magnetic pole pitch of the multipole magnet. Rotation angles of the rotor are detected by coils extended across the plurality of amorphous magnetic cores to be magnetically coupled with the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.