公开(公告)号：US20240243679A1

公开(公告)日：2024-07-18

申请号：US18574399

申请日：2022-06-02

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： Jochen Reith ,  Jiufang Peng ,  Jurgen Eich

IPC: H02P21/20 ,  H02P21/14 ,  H02P27/06

CPC classification number: H02P21/20 ,  H02P21/141 ,  H02P27/06

Abstract: The present disclosure relates to a method for estimating a torque of an electric machine, comprising the following steps: estimating a first torque using a first method by forming a cross product from an estimated magnetic flux of the electric machine and an actual current of the electric machine, estimating a second torque using a second method by determining a power balance which can be calculated with the aid of a difference between an AC output power of an inverter, which is connected to the electric machine, and a total power loss of the electric machine, and determining the final torque as a weighted average from the first torque, which is weighted with a first weighting, and the second torque, which is weighted with a second weighting. The present disclosure also relates to a control unit for carrying out this method and to an electrical traction drive having such a control unit.

公开(公告)号：US20220026286A1

公开(公告)日：2022-01-27

申请号：US17422846

申请日：2019-11-04

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： Jochen Reith ,  Tom Huck ,  Jiufang Peng

IPC: G01K7/42 ,  G01K13/08 ,  H02P29/60

Abstract: A method calculates temperatures in an electric drive unit. A first temperature detection region has a first temperature and a second temperature detection region has a second temperature. The first temperature is influenced by a first coupling value which is non-linearly dependent on the first temperature and the temperature at the first and second temperature detection regions. The calculations are divided among separate calculation units such that the temperatures can be estimated in real time.

公开(公告)号：US11971314B2

公开(公告)日：2024-04-30

申请号：US17422846

申请日：2019-11-04

Applicant: Schaeffler Technologies AG & Co. KG

Inventor： Jochen Reith ,  Tom Huck ,  Jiufang Peng

IPC: G01K7/42 ,  G01K13/08 ,  H02P29/60

CPC classification number: G01K7/427 ,  G01K13/08 ,  H02P29/60 ,  G01K2205/00

Abstract: A method calculates temperatures in an electric drive unit. A first temperature detection region has a first temperature and a second temperature detection region has a second temperature. The first temperature is influenced by a first coupling value which is non-linearly dependent on the first temperature and the temperature at the first and second temperature detection regions. The calculations are divided among separate calculation units such that the temperatures can be estimated in real time.