公开(公告)号：US20200091747A1

公开(公告)日：2020-03-19

申请号：US16574806

申请日：2019-09-18

Applicant: Johnson Controls Technology Company

Inventor： Christopher J. Merkl ,  George John Dietz ,  Gary A. Romanowich ,  Kevin Anthony Weiss

IPC: H02J7/00 ,  G01R31/02 ,  G05B19/042

Abstract: A method of determining a lifetime parameter of a capacitor in a failsafe device including measuring an amount of energy required to return the failsafe device to a failsafe position, measuring an effective capacitance of the capacitor, and comparing the amount of energy to the effective capacitance to determine the lifetime parameter of the capacitor.

公开(公告)号：US11870280B2

公开(公告)日：2024-01-09

申请号：US16574806

申请日：2019-09-18

Applicant: Johnson Controls Technology Company

Inventor： Christopher J. Merkl ,  George John Dietz ,  Gary A. Romanowich ,  Kevin Anthony Weiss

IPC: H02J7/00 ,  G05B19/042 ,  G01R31/64 ,  H02J7/34 ,  G05B15/02

CPC classification number: H02J7/00 ,  G01R31/64 ,  G05B19/0428 ,  G05B15/02 ,  G05B2219/25011 ,  H02J7/345

Abstract: A method of determining a lifetime parameter of a capacitor in a failsafe device including measuring an amount of energy required to return the failsafe device to a failsafe position, measuring an effective capacitance of the capacitor, and comparing the amount of energy to the effective capacitance to determine the lifetime parameter of the capacitor.