公开(公告)号：US10132850B2

公开(公告)日：2018-11-20

申请号：US15232969

申请日：2016-08-10

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jeffrey Louis Daigle ,  Jeffrey John Wolff ,  Latha Belagumba Narasegowda ,  Swapan Kumar Kundu

IPC: G01R31/02 ,  H02H7/122 ,  B60L11/18 ,  H02P27/06 ,  H02H3/16

Abstract: A system for testing a ground fault detection system in an electric circuit establishes a ground connection between a bus and the ground via an inverter and a load by closing an inverter switch of the inverter and a grounding switch disposed between the load and the ground, determines whether the ground connection is detected, and determines a fault in the ground fault detection system responsive to the first ground connection not being detected by the ground fault detection system. Optionally, a ground fault may be identified by determining three phase voltages provided from each of plural inverters, determining symmetrical components of the three phase voltages for each of the inverters, and identifying a ground fault in one or more of the inverters while powered by the power supply based on the symmetrical components.

公开(公告)号：US20190049507A1

公开(公告)日：2019-02-14

申请号：US16164204

申请日：2018-10-18

Applicant: General Electric Company

Inventor： Jeffrey Louis Daigle ,  Jeffrey John Wolff ,  Latha Belagumba Narasegowda ,  Swapan Kumar Kundu

IPC: G01R31/02 ,  G01R31/00 ,  H02H7/122 ,  B60L11/18 ,  H02P27/06 ,  H02H3/16

Abstract: A system for testing a ground fault detection system in an electric circuit establishes a ground connection between a bus and the ground via an inverter and a load by closing an inverter switch of the inverter and a grounding switch disposed between the load and the ground, determines whether the ground connection is detected, and determines a fault in the ground fault detection system responsive to the first ground connection not being detected by the ground fault detection system. Optionally, a ground fault may be identified by determining three phase voltages provided from each of plural inverters, determining symmetrical components of the three phase voltages for each of the inverters, and identifying a ground fault in one or more of the inverters while powered by the power supply based on the symmetrical components.

公开(公告)号：US20180045767A1

公开(公告)日：2018-02-15

申请号：US15232969

申请日：2016-08-10

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jeffrey Louis Daigle ,  Jeffrey John Wolff ,  Latha Belagumba Narasegowda ,  Swapan Kumar Kundu

IPC: G01R31/02 ,  B60L11/18 ,  B60R16/033 ,  H02H7/122

CPC classification number: G01R31/025 ,  B60L11/1803 ,  G01R31/007 ,  G01R31/008 ,  H02H3/162 ,  H02H7/1225 ,  H02P27/06

Abstract: A system for testing a ground fault detection system in an electric circuit establishes a ground connection between a bus and the ground via an inverter and a load by closing an inverter switch of the inverter and a grounding switch disposed between the load and the ground, determines whether the ground connection is detected, and determines a fault in the ground fault detection system responsive to the first ground connection not being detected by the ground fault detection system. Optionally, a ground fault may be identified by determining three phase voltages provided from each of plural inverters, determining symmetrical components of the three phase voltages for each of the inverters, and identifying a ground fault in one or more of the inverters while powered by the power supply based on the symmetrical components.