Angle detection apparatus, motor having the angle detection apparatus, torque sensor, electric power steering apparatus, and vehicle
US9481394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2015 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Aug 7, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2013
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There are provided an angle detection apparatus configured to correct an error included in angle information output from a multipolar angle detector, a motor having the angle detection apparatus, a torque sensor, an electric power steering apparatus, and a vehicle. A multiplication circuit (12) generates digital electrical angle information (θed) from analog angle information output from a multipolar optical encoder (11), a first differentiator 30 differentiates the electrical angle information (θed) to operate an electrical angular velocity (ωed), a first discontinuity correction circuit (31) carries out processing of correcting a discontinuity of an angular velocity in a temporal change for the electrical angular velocity (ωed), and a digital filter (32) carries out correction processing of reducing a high-frequency noise component for an electrical angular velocity (ωedc) corrected by the first discontinuity correction circuit (31).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.