Power converter for electric vehicle
US10819218B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2019 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Aug 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter for an electric vehicle that converts output of a battery to driving an electric traction motor is disclosed. The power converter may include: a power switching element; a current sensor provided on a bus bar in which an output current of the switching element flows; a cooler cooling the switching element; a temperature sensor measuring a temperature of a coolant; and a controller controlling the switching element. The controller may be configured to: estimate a temperature of the current sensor based on the temperature of the coolant; determine a first and second correction values for the estimated temperature based on the output current and an input voltage applied to the switching element; and restrict a load on the switching element when a corrected temperature, which is obtained by adding the first and second correction values to the estimated temperature, exceeds a predetermined temperature threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.