公开(公告)号：US20250015677A1

公开(公告)日：2025-01-09

申请号：US18761807

申请日：2024-07-02

Applicant: Danfoss Power Electronics A/S

Inventor： Jörg Dannehl ,  Luzia Almeida

IPC: H02K11/21

Abstract: A method (100) for calculation of a mechanical speed of an electric rotational machine (400) including calculating (101) a frequency spectrum from signals measured by at least one vibration sensor (403) attached to the rotational machine (400); extracting (103) a mechanical speed component from the calculated frequency spectrum; calculating (105) the mechanical speed of the rotational machine (400) as a function of the mechanical speed component, wherein the mechanical speed component is extracted as a function of a frequency component that is greater than a given threshold (303).

公开(公告)号：US20230194630A1

公开(公告)日：2023-06-22

申请号：US18067862

申请日：2022-12-19

Applicant: Danfoss Power Electronics A/S

Inventor： Lucian Asiminoaei ,  Luzia Almeida ,  Jörg Dannehl ,  Sanjeet Kumar Dwivedi ,  Norbert Hanigovszki

IPC: G01R31/64 ,  G01R23/15

CPC classification number: G01R31/64 ,  G01R23/15 ,  H03H7/0115

Abstract: The present invention is directed at a method for evaluating the degradation level of capacitors of a power filter connected to an adjustable speed drive (ASD) or a power converter. The invention is also directed at an adjustable speed drive and a power converter provided for performing the method.