Rotating field sensor and angle determination method using the same
US9557191B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2014 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Aug 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotating field sensor includes four detection circuits and a computing unit. In the computing unit, defined are four first detection circuit groups each consisting of three detection circuits. Further, defined in each first detection circuit group are three second detection circuit groups each consisting of two detection circuits. The computing unit calculates an angle value for each of all the second detection circuit groups on the basis of the output signals of the two detection circuits, extracts one or more normal first detection circuit groups each of which is such one that all three angle values corresponding to the three second detection circuit groups fall within an angle range of a predetermined breadth, and determines an angle detection value on the basis of at least one of all angle values corresponding to all second detection circuit groups belonging to the one or more normal first detection circuit groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.