Temperature based electric machine control
US10033326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2016 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vehicle having at least two electric machines includes an oil circulation path that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path to control the commanded torque output by the electric machines. In the event of a failure or fault in an oil temperature sensor, the controller estimates the oil temperature from the temperature of coils within at least one of the electric machines. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to satisfy torque demands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.