公开(公告)号：US20240029978A1

公开(公告)日：2024-01-25

申请号：US18043024

申请日：2021-09-15

Applicant: SENSATA TECHNOLOGIES, INC.

Inventor： SIEBE BERVELING ,  PAUL GENNISSEN ,  MURRAY MCTIGUE ,  GREGORY LYONS

IPC: H01H47/00 ,  H01H50/18 ,  H01H47/22 ,  G01R31/327

CPC classification number: H01H47/002 ,  H01H50/18 ,  H01H47/22 ,  G01R31/3275

Abstract: Methods and apparatuses for failure mode detection in a contactor are disclosed. In a particular embodiment, a method for failure mode detection in a contactor includes maintaining the contactor command signal in the open state; connecting the contactor to a voltage supply that supplies a first predetermined voltage amount to the contactor; measuring a first amount of time for a magnitude of a coil current of the coil to exceed a first predetermined current threshold; determining whether the first amount of time exceeds a first predetermined time threshold; responsive to determining that the first amount of time does not exceed the first predetermined time threshold, determining that the contactor is in the open state; and responsive to determining that the first amount of time exceeds the first predetermined time threshold, determining that the contactor is in the closed state.