US 12,392,324 B2
Method and device for determining an efficiency and/or for calibrating a torque of a rotating drive train, in particular of a wind energy installation
Hongkun Zhang, Bremerhaven (DE); Andreas Ruhle, Bremerhaven (DE); and Paul Feja, Bremerhaven (DE)
Assigned to Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V., Munich (DE)
Appl. No. 18/043,835
Filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich (DE)
PCT Filed Aug. 27, 2021, PCT No. PCT/EP2021/073808
§ 371(c)(1), (2) Date Mar. 2, 2023,
PCT Pub. No. WO2022/049008, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 10 2020 211 141.3 (DE), filed on Sep. 3, 2020.
Prior Publication US 2023/0332577 A1, Oct. 19, 2023
Int. Cl. F03D 17/00 (2016.01); F03D 15/00 (2016.01)
CPC F03D 17/00 (2016.05) [F03D 15/00 (2016.05); F05B 2270/20 (2013.01); F05B 2270/335 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for ascertaining an efficiency of a drive train, the drive train including:
a first end with a first shaft portion, the first shaft portion configured to be driven by a first drive device;
a second end with a second shaft portion, the second shaft portion configured to be driven by a second drive device; and
a mechanical transfer element located between the first end and the second end, the method comprising:
driving the first end of the drive train in a first test;
detecting a variable dependent on a torque acting on the first shaft portion at the first end of the drive train and a variable dependent on a torque acting on the second shaft portion at the second end of the drive train during the first test;
driving the second end of the drive train in a second test;
detecting a variable dependent on a torque acting on the second shaft portion at the second end of the drive train and a variable dependent on a torque acting on the first shaft portion on the first end of the drive train during the second test; and
determining an efficiency of the drive train, wherein the efficiency is determined based on one or more of: a power determined during the first test, a power determined during the second test, the variable dependent on the torque acting on the first shaft portion and the variable depending on the torque on the second shaft portion during the first test, the variable dependent on the torque acting on the first shaft portion and the variable depending on the second shaft portion during the second test, and at least one predetermined criterion, wherein the variable dependent on the torque acting on the first shaft portion during the first test and the variable dependent on the torque acting on the second shaft portion during the second test are each measured by a sensor detecting a mechanical measurement variable.