公开(公告)号：US20170254726A1

公开(公告)日：2017-09-07

申请号：US15063043

申请日：2016-03-07

Applicant: General Electric Company

Inventor： Subhas Chandra Das ,  Ajith Kuttannair Kumar ,  Shankar Chandrasekaran ,  Rupam Mukherjee

IPC: G01M15/11 ,  F02D29/06 ,  F02D41/22 ,  F02B63/04 ,  F02D41/00

CPC classification number: G01M15/11 ,  B60L50/10 ,  F02B63/047 ,  F02D29/02 ,  F02D29/06 ,  F02D41/0085 ,  F02D41/0097 ,  F02D41/1498 ,  F02D41/22 ,  F02D2041/288 ,  F02D2200/1002 ,  F02D2200/101 ,  G01M15/12 ,  Y02T10/40

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a sensor configured to measure one or more of a parameter of generator output, engine speed, or engine shaft torque, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from another component of the system being less than a threshold value.

公开(公告)号：US10345195B2

公开(公告)日：2019-07-09

申请号：US15063043

申请日：2016-03-07

Applicant: General Electric Company

Inventor： Subhas Chandra Das ,  Ajith Kuttannair Kumar ,  Shankar Chandrasekaran ,  Rupam Mukherjee

IPC: G01M15/11 ,  F02D29/06 ,  F02D41/22 ,  F02B63/04 ,  F02D41/00 ,  F02D29/02 ,  G01M15/12 ,  F02D41/14 ,  F02D41/28 ,  B60L50/10

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a sensor configured to measure one or more of a parameter of generator output, engine speed, or engine shaft torque, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from another component of the system being less than a threshold value.

公开(公告)号：US20190193760A1

公开(公告)日：2019-06-27

申请号：US16222822

申请日：2018-12-17

Applicant: General Electric Company

Inventor： Ajith Kuttannair Kumar ,  Shankar Chandrasekaran ,  Subhas Chandra Das ,  Rupam Mukherjee ,  Munishwar Ahuja

IPC: B61L3/00 ,  B61L15/00

CPC classification number: B61L3/006 ,  B61C5/00 ,  B61L3/002 ,  B61L3/008 ,  B61L15/0072 ,  B61L15/0081

Abstract: A locomotive control system measures actuating parameters of a locomotive propulsion system and monitors the actuating parameters according to a forcing function of operation of the propulsion system. A degraded component of the locomotive is identified by comparing actuating parameters generated according to the forcing function with actuating parameters expressed as a function of speed of another locomotive propulsion system, examining changes in the generated actuating parameters over time, examining oscillations in movement of the locomotive during gear shifting, comparing wheel speed decreases during another forcing function, and/or comparing a magnitude of a spectrum of the actuating parameters of with one or more designated magnitudes.

公开(公告)号：US20180205326A1

公开(公告)日：2018-07-19

申请号：US15921299

申请日：2018-03-14

Applicant: General Electric Company

Inventor： Ajith Kuttannair Kumar ,  Subhas Chandra Das

IPC: H02M7/44 ,  H02M1/14

CPC classification number: H02M7/44 ,  H02M1/14 ,  H02M7/5387 ,  H02M7/53875 ,  H02M2001/008 ,  H02M2007/53876

Abstract: The systems and methods described herein relate to electrical circuits. A system (e.g., inverter current system) is provided. The system includes plural inverters connected to a common bus and at least one capacitor. The inverters are configured to convert a direct current (DC) through the common bus to an alternating current (AC), by alternating different switches of the inverters between open and closed states in a respective switching cycle for each of the inverters. The system includes a controller circuit. The controller circuit is configured to adjust a current conducted onto the common bus to the inverters so that a root mean square of the current meets one or more designated criteria. The controller circuit controls the inverters to apply a frequency shift to the respective switching cycle of one or more of the inverters.

公开(公告)号：US10291147B2

公开(公告)日：2019-05-14

申请号：US15921299

申请日：2018-03-14

Applicant: General Electric Company

Inventor： Ajith Kuttannair Kumar ,  Subhas Chandra Das

IPC: H02M7/538 ,  H02M7/44 ,  H02M1/14 ,  H02M7/5387 ,  H02M1/00

Abstract: The systems and methods described herein relate to electrical circuits. A system (e.g., inverter current system) is provided. The system includes plural inverters connected to a common bus and at least one capacitor. The inverters are configured to convert a direct current (DC) through the common bus to an alternating current (AC), by alternating different switches of the inverters between open and closed states in a respective switching cycle for each of the inverters. The system includes a controller circuit. The controller circuit is configured to adjust a current conducted onto the common bus to the inverters so that a root mean square of the current meets one or more designated criteria. The controller circuit controls the inverters to apply a frequency shift to the respective switching cycle of one or more of the inverters.