Temperature estimating device and temperature estimating method
US8975851B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2205/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature estimating unit includes an energy calculating unit that calculates a heat generation energy rate of a motor on the basis of a difference between power input to the motor and power output from the motor, a heat radiation energy calculating unit that calculates a heat radiation energy rate from a target member on the basis of a difference between a previous temperature estimation value Tm of the target member and an ambient temperature, and a thermal coefficient of the target member, and an amount calculating unit that calculates a temperature increase rate of the target member on the basis of a difference between the heat generation energy rate and the heat radiation energy rate, and an estimation value calculating unit that calculates a current temperature estimation value of the target member on the basis of the temperature increase rate and the previous temperature estimation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.