公开(公告)号：US20170272021A1

公开(公告)日：2017-09-21

申请号：US15462204

申请日：2017-03-17

Applicant: General Electric Company

Inventor： Shahid ALI ,  Rahul Radhakrishna PILLAI ,  Jigarkumar Narendrabhai HINGU ,  Vandana RALLABANDI

IPC: H02P25/03 ,  H02P27/06

Abstract: A driver unit for an interior permanent magnet motor (IPM) is presented. The driver unit includes sensor electronics configured to sense a phase voltage corresponding to one or more phase terminals of the IPM motor to generate a corresponding phase voltage signal. The driver unit further includes a controller electrically coupled to the sensor electronics and configured to extract one or more triplen harmonics of an order of a ninth harmonic and higher than the ninth harmonic of a fundamental frequency of the phase voltage signal corresponding to the one or more phase terminals. The controller is further configured to determine an angular position of a rotor of the IPM motor based on the extracted one or more triplen harmonics. Related motor assembly and method for controlling the IPM motor are also presented.

公开(公告)号：US20190052166A1

公开(公告)日：2019-02-14

申请号：US15675845

申请日：2017-08-14

Applicant: General Electric Company

Inventor： Shahid ALI ,  Ajith Kuttannair KUMAR ,  Govardhan GANIREDDY ,  Prashanth Manikumar CHENNAMSETTY

IPC: H02M1/12 ,  H02M7/539

CPC classification number: H02M1/12 ,  H02M7/23 ,  H02M7/493 ,  H02M7/539 ,  H02M2001/0009 ,  H02M2001/0025

Abstract: A power system is presented. The power system includes a first converter including a first output terminal a first control unit coupled to the first converter, a second converter including a second output terminal, where the second converter is coupled in parallel to the first converter, and a second control unit coupled to the second converter. The second control unit is configured to measure a plurality of phase currents at the second output terminal, determine a harmonic current transmitted by the second converter based on single phase current of the plurality of measured phase currents, and change a time-period of at least one switching cycle of a carrier wave of the second converter based on the determined harmonic current to synchronize with a carrier wave of the first converter.

公开(公告)号：US20190009690A1

公开(公告)日：2019-01-10

申请号：US15643537

申请日：2017-07-07

Applicant: General Electric Company

Inventor： Ajith Kuttannair KUMAR ,  Govardhan GANIREDDY ,  Shahid ALI ,  Prashanth Manikumar CHENNAMSETTY

IPC: B60L15/00 ,  H02J3/46 ,  H02J3/01 ,  B61C3/00

Abstract: A power system is disclosed. The power system includes a first power generating unit. The first power generating unit includes a first power converting subunit and a first control unit coupled to the first power converting subunit, where the first control unit is configured to regulate a voltage of the first power generating unit. The power system further includes a second power generating unit coupled to the first power generating unit and a load, where the second power generating unit includes a second power converting subunit and a second control unit coupled to the second power converting subunit, wherein the second control unit is configured to control a current of the second power generating unit to share a quantity of electrical output current flowing through the load among the first and second power generating units.

公开(公告)号：US20230057924A1

公开(公告)日：2023-02-23

申请号：US17796610

申请日：2020-08-11

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Shahid ALI ,  Sumitha MOHAN ,  Balakrishna PAMULAPARTHY

IPC: G01R31/34 ,  G01P3/44 ,  G01M13/00 ,  H02P29/024 ,  H02P23/14

Abstract: The present disclosure relates to systems and methods for improved anomaly detection for rotating machines. An example method may include determining a rotational speed of a rotating machine; determining, using a frequency domain transform of a signal, a frequency domain signal; determining, based on the rotational speed, a first frequency band within the frequency domain signal for identifying a fault frequency; determining a fault frequency within the first frequency band; determining, based on the fault frequency, a second frequency band within the first frequency band, wherein the second frequency band includes the fault frequency; determining, based on the second frequency band, a first fault index and a baseline of the first fault index; determining, based on a deviation of a second fault index from the baseline, a fault condition; and providing an alert based on the fault condition.