US 12,188,833 B2
Determining a temperature in an electric machine
Sebastian Supper, Karlsruhe (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/782,735
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Dec. 14, 2020, PCT No. PCT/DE2020/101054
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/143967, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 10 2020 100 636.5 (DE), filed on Jan. 14, 2020.
Prior Publication US 2023/0003587 A1, Jan. 5, 2023
Int. Cl. G01K 7/21 (2006.01); H02K 11/25 (2016.01)
CPC G01K 7/21 (2013.01) [H02K 11/25 (2016.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining a temperature in an electric machine,
the method comprising:
determining a temperature-dependent output value of a first temperature sensor assigned to the electric machine, wherein the first temperature sensor has a characteristic curve with a plurality of characteristic curve branches, each characteristic curve branch being assigned to a respective temperature range of a plurality of temperature ranges, and each characteristic curve branch linking a value of a measured temperature to an output value of the first temperature sensor;
determining a temperature-dependent output value of a second temperature sensor assigned to the electric machine;
selecting one temperature range of the plurality of temperature ranges of the characteristic curve branches of the first temperature sensor, the one temperature range including the measured temperature corresponding to the output value of the second temperature sensor; and
determining the temperature in the electric machine from the determined output value of the first temperature sensor and the characteristic curve branch assigned to the one temperature range.