公开(公告)号：US09234931B2

公开(公告)日：2016-01-12

申请号：US13790906

申请日：2013-03-08

Applicant: CATERPILLAR INC.

Inventor： Robert W. Lindsey ,  Daniel D. Podany ,  Sangameshwar Sonth ,  Thomas M. Sopko ,  Richard G. Auch ,  Jason Miller

IPC: H02H9/00 ,  E01C23/14 ,  G01R31/02 ,  E01C19/22 ,  G01R31/00

CPC classification number: G01R31/025 ,  E01C19/22 ,  E01C2301/10 ,  G01R31/006

Abstract: A fault detection system for a machine having a plurality of electrical conducting elements insulated from a frame ground of the machine is disclosed. The fault detection system may include a high voltage DC power source, a positive high voltage bus connected to a positive terminal of the high voltage DC power source and providing high voltage electrical power to the plurality of electrical conducting elements, and a negative high voltage bus connected to a negative terminal of the high voltage DC power source and returning high voltage electrical power from the plurality of electrical conducting elements. At least one of the positive and negative high voltage buses may be selectively connected through a plurality of switches to plural zones of the electrical conducting elements, with each of the plural zones being electrically connected in parallel, and selectively connected to the high voltage DC power source by one of the plurality of switches. A low voltage DC power source may be configured to form part of a leakage current detector selectively connected through each of the plurality of switches to each of the plural zones for detecting leakage current between an electrical conducting element and the frame ground.

Abstract translation: 公开了一种用于机器的故障检测系统，其具有与机器的框架接地绝缘的多个导电元件。 故障检测系统可以包括高压直流电源，连接到高压直流电源的正端的正高压母线，并向多个导电元件提供高压电力，以及负高压母线 连接到高压直流电源的负极端子并从多个导电元件返回高压电力。 正极和负极高压母线中的至少一个可以通过多个开关选择性地连接到导电元件的多个区域，其中多个区域中的每一个并联电连接，并且选择性地连接到高压DC电力 源由多个开关中的一个开关。 低压DC电源可以被配置成形成漏电流检测器的一部分，该漏电流检测器通过多个开关中的每一个选择性地连接到多个区域中的每一个，以检测导电元件和框架接地之间的漏电流。