Torque detection device
US8660743B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 2010 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Dec 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An output section of one detection coil of a first resolver and an output section of one detection coil of a second resolver are connected by a first inter-coil resistor element, and an output section of the other detection coil of the first resolver and an output section of the other detection coil of the second resolver are connected by a second inter-coil resistor element. A sin wave signal for excitation is supplied to one of first and second excitation coils, and a cos wave signal for excitation having the same frequency as that of the sin wave signal for excitation and having a phase delay of 90° in relation to the sin wave signal for excitation is supplied to the other of the first and second excitation coils. By virtue of this configuration, the rotational angles of the two resolvers can be calculated even when one of detection lines is broken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.