Patent · US Active

Solenoid system with position and temperature detection

US11977119B2 · kind B2 · utility

1Cited by

7References

20Claims

0Family size

Assignee

Maxim Integrated Products, Inc. · US

Inventors

Onno Martens · Hamburg, DE
Lars Larsson · Hamburg, DE
Christof Heilemann · Hamburg, DE

Key dates

Filing date	Jan 19, 2022
Grant date	May 7, 2024
Priority date	—
Expiry date	Nov 6, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/1888
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A solenoid system and method can include: providing an energizing voltage to a coil of a solenoid; providing an AC signal superimposed onto the energizing voltage; detecting current through the coil including an AC current amplitude induced by the AC signal and including a DC offset current amplitude; determining the AC current amplitude is a low AC current amplitude based on an armature within the solenoid being in a retracted position or determining the AC current amplitude is a high AC current amplitude based on the armature being in an extended position with the control logic, and where the AC current amplitude is determined utilizing the AC signal for synchronous demodulation; and determining a temperature fault based on the DC offset current amplitude falling below a DC offset current amplitude threshold.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.