Temperature detection apparatus and rotation angle detection apparatus
US10078018B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2016 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Dec 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K15/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature detection apparatus and a rotation angle detection apparatus are provided that allow a temperature of a resolver to be calculated in real time. A rotation angle detection apparatus (10) (temperature detection apparatus) includes a resolver (20) with an excitation coil and output coils wound thereon, the excitation coil being subjected to an excitation voltage (VA) and the output coil outputting voltage signals (VB, VC) corresponding to the excitation voltage (VA), and a temperature calculation circuit (sensor microcomputer (32)) that detects a phase of the excitation voltage (VA) and that detects a phase of an excitation current (IA). The temperature calculation circuit (sensor microcomputer (32)) calculates a temperature of the resolver (20) based on a phase difference between the excitation voltage (VA) and the excitation current (IA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.