公开(公告)号：US10353004B2

公开(公告)日：2019-07-16

申请号：US15310782

申请日：2015-03-24

Applicant: ABB Schweiz AG

Inventor： Prasad Mulay ,  Maciej Orman ,  Karthik Krishnamoorthi ,  Cajetan Pinto ,  Pawel Rzeszucinski

IPC: G01R31/34 ,  G01R29/08 ,  G01R33/04 ,  G01R33/10

Abstract: In aspects, the present invention discloses a method of detecting a rotor fault in an electric machine using a data analysis unit. The method comprises measuring magnetic field strength along a first axis and a second axis, determining operating slip frequency of the electric machine using the measured magnetic field strength along the first axis and the second axis, determining an amplitude of the determined operating slip frequency in a first frequency spectrum and an amplitude of operating slip frequency in a second frequency spectrum, and detecting the rotor fault by comparing the amplitude of the determined operating slip frequency in the first frequency spectrum and the amplitude of operating slip frequency in the second frequency spectrum against a predetermined threshold.

公开(公告)号：US10670657B2

公开(公告)日：2020-06-02

申请号：US15453411

申请日：2017-03-08

Applicant: ABB Schweiz AG

Inventor： Maciej Orman ,  Pawel Rzeszucinski ,  Karthik Krishnamoorthi

IPC: G01R31/34 ,  G01P3/02 ,  G01R33/02 ,  G08B21/18 ,  H04W88/02

Abstract: A system configured for monitoring the operation status of an electric machine; a mobile phone therefor and server-based system using the same. The system includes a portable unit, adapted for free movement around the electric machine; an airborne acoustics sensor, adapted for measuring acoustic data produced by the electric machine at a first position in a path of the free movement; a magnetic field sensor, adapted for measuring magnetic field data produced by the electric machine at a second position in the path of the free movement; and a processing unit, adapted for calculating the operation status of the electric machine based on the acoustic data from the airborne acoustics sensor and the magnetic field data from the magnetic field sensor; wherein: the airborne acoustics sensor and the magnetic field sensor are integrated with the portable unit.