公开(公告)号：US20230061652A1

公开(公告)日：2023-03-02

申请号：US17465152

申请日：2021-09-02

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Junfeng Liao ,  Benfeng Tang

IPC: H01H1/00 ,  H01H50/54 ,  H01H73/04

Abstract: A method for determining contact thickness change in a contactor includes sensing a first displacement distance moved by an armature of the contactor from a reference location to a first transition point during a switch-off operation of the contactor at a first contactor life reference time when movable contacts and fixed contacts of the contactor define a first contact thickness. The method further includes sensing a second displacement distance moved by the armature from the reference location to a second transition point during a switch-off operation at a second contactor life reference time that is after the first contactor life reference time when the movable and fixed contacts define a second contact thickness that is less than the first contact thickness. The first displacement distance and the second displacement distance are used to determine a contact thickness change between the first contact thickness and the second contact thickness. A contactor adapted to implement the method is also disclosed.

公开(公告)号：US11967470B2

公开(公告)日：2024-04-23

申请号：US17465152

申请日：2021-09-02

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Junfeng Liao ,  Benfeng Tang

IPC: H01H1/00 ,  H01H50/54 ,  H01H73/04 ,  H01H71/04

CPC classification number: H01H1/0015 ,  H01H50/546 ,  H01H73/045 ,  H01H2071/044

Abstract: A method for determining contact thickness change in a contactor includes sensing a first displacement distance moved by an armature of the contactor from a reference location to a first transition point during a switch-off operation of the contactor at a first contactor life reference time when movable contacts and fixed contacts of the contactor define a first contact thickness. The method further includes sensing a second displacement distance moved by the armature from the reference location to a second transition point during a switch-off operation at a second contactor life reference time that is after the first contactor life reference time when the movable and fixed contacts define a second contact thickness that is less than the first contact thickness. The first displacement distance and the second displacement distance are used to determine a contact thickness change between the first contact thickness and the second contact thickness. A contactor adapted to implement the method is also disclosed.