US 11,892,369 B2
Method for evaluating the operational readiness of an electric motor, electric motor, and ventilator
Joachim Schmezer, Niedernhall (DE)
Assigned to ZIEHL-ABEGG SE, Künzelsau (DE)
Appl. No. 17/260,368
Filed by ZIEHL-ABEGG SE, Künzelsau (DE)
PCT Filed Jun. 4, 2019, PCT No. PCT/DE2019/200059
§ 371(c)(1), (2) Date Jan. 14, 2021,
PCT Pub. No. WO2020/015798, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 102018211850.7 (DE), filed on Jul. 17, 2018.
Prior Publication US 2021/0278316 A1, Sep. 9, 2021
Int. Cl. G01M 13/045 (2019.01); G01R 31/34 (2020.01); G08B 5/36 (2006.01)
CPC G01M 13/045 (2013.01) [G01R 31/343 (2013.01); G08B 5/36 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for evaluating the operational readiness of an electric motor, the method comprising:
initiating a run-up process wherein the electric motor speed is changed between a plurality of speed levels;
generating at least one measured value by measuring a physical variable of the electric motor with a sensor during at least one of the speed levels wherein during generating the at least one measured value one or more of an acceleration and a speed of vibration of the electric motor is measured using a vibration sensor of the electric motor and a vibration value is generated;
loading at least one parameter datum from a parameter memory of the electric motor, wherein the at least one parameter datum corresponds to the generated at least one measured value;
evaluating the at least one measured value for at least one of the speed levels using the at least one loaded parameter datum; and
determining a first vibration value while the electric motor is stopped and determining a second vibration value at a non-zero speed, wherein damage is determined to be present if a difference between the second vibration value and the first vibration value exceeds a calibration vibration value by a predetermined degree, the calibration vibration value being generated during a calibration measurement of the electric motor for the non-zero speed.