Angular position detection apparatus
US6483296B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jan 12, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D11/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angular position detection apparatus, which can improve a detection accuracy of the angular position by improving a linearity of an output characteristic with respect to an angular position detection apparatus, and to downsize an outer size thereof. A permanent magnet is fixed to a side surface of a rotor core, which integrally rotates with a detection target object. An inner surface of a cylindrical portion of the rotor core is closely confronted with an outer surface of a stator core. Thus, the angular position detection apparatus is formed as a radial gap type in which magnetic flux is gone through an air gap G1 between the cylindrical portion and the stator core along a radial direction. A magnetic flux detection gap portion is formed at a center portion of the stator core so as to go through toward a diametral direction. A Hall IC is arranged in the magnetic flux detection gap portion. The permanent magnet is magnetized so that lines of magnetic force therein are parallel with each other. As a result, it can expand the range, in which the magnetic flux density in the magnetic flux detection gap portion linearly changes in proportion to the angular position of the rotor core…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.