Tachogenerator having a magnetoresistance stator coil
US4656377A · kind A · utility
14Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1985 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Jan 28, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tachogenerator has a magnetoresistance film coil formed on a stator surface along a circular path concentric with a rotor axis. The coil has a spatially periodic structure, with multiple spaced-apart lateral components series connected with longitudinal components. The stator surface is opposite to a rotor surface having multiple equiangularly spaced magnetic pole faces with alternately opposite polarities. Current passed through the coil develops voltage variations. Undesirable small voltage variations resulting from manufacturing tolerances are averaged to zero at the coil output terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.