Rotation angle detection device
US10243432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2016 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Jan 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotation angle detection device detects a rotation angle of a motor having a shaft passing through a heat-dissipation plate. The rotation angle detection device includes: a permanent magnet attached to a base end of the shaft; a board that is disposed above the heat-dissipation plate and on which a drive circuit of the motor and a control circuit of the drive circuit are mounted; a magnetic sensor that is provided on the board so as to face the permanent magnet; and a magnetic shielding member that has a tubular shape and is disposed between the heat-dissipation plate and the board to surround the permanent magnet in plan view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.