公开(公告)号：US11574756B2

公开(公告)日：2023-02-07

申请号：US16734791

申请日：2020-01-06

Applicant: United Technologies Corporation

Inventor： Rajkumar Sengodan

IPC: H01F7/18 ,  G01R31/72 ,  G01R19/00

Abstract: Provided are embodiments for determining solenoid plunger position by performing a method which includes generating, by a first signal circuit, a first signal based at least in part on a pull-in current value of a current applied to a solenoid coil of a solenoid. The method further includes generating, by a second signal circuit, a second signal by applying a time delay to the first signal. The method further includes comparing, by a comparator circuit, the first signal and the second signal to determine whether a plunger of the solenoid has moved within the solenoid from a first position to a second position. The method further includes, responsive to determining that the plunger of the solenoid has moved within the solenoid from the first position to the second position, reducing the current applied to the solenoid coil of the solenoid from the pull-in current value to a hold current value.

公开(公告)号：US20210134502A1

公开(公告)日：2021-05-06

申请号：US16734791

申请日：2020-01-06

Applicant: United Technologies Corporation

Inventor： Rajkumar Sengodan

IPC: H01F7/18 ,  G01R19/00 ,  G01R31/72

Abstract: Provided are embodiments for determining solenoid plunger position by performing a method which includes generating, by a first signal circuit, a first signal based at least in part on a pull-in current value of a current applied to a solenoid coil of a solenoid. The method further includes generating, by a second signal circuit, a second signal by applying a time delay to the first signal. The method further includes comparing, by a comparator circuit, the first signal and the second signal to determine whether a plunger of the solenoid has moved within the solenoid from a first position to a second position. The method further includes, responsive to determining that the plunger of the solenoid has moved within the solenoid from the first position to the second position, reducing the current applied to the solenoid coil of the solenoid from the pull-in current value to a hold current value.