Patent · US Active

Method for detecting the position of an armature of an electromagnetic actuator

US8482299B2 · kind B2 · utility

1Cited by

10References

4Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Michael Pantke · Friedrichshafen, DE
Jörg Kurth · Meckenbeuren, DE

Key dates

Filing date	Sep 10, 2009
Grant date	Jul 9, 2013
Priority date	—
Expiry date	May 10, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/185
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of detecting the position of the armature (3) of an electromagnetic actuator arranged and able to move between first and second coils (1, 2), in which a voltage jump (UB) is applied to the first and the second coils (1, 2) of the actuator connected in series. The first and the second coils (1, 2) form a voltage divider in accordance with the impedance coil principle. The voltage (U1) of the first coil (1) and the voltage (U2) of the second coil (2) are measured and, from the measurement data for the voltages at the first and the second coils (1, 2), the quotient of the difference (ΔU) between the two voltage values and the voltage jump (UB), normalized in relation to the size of the voltage jump (UB) is calculated, and a specific armature stroke is correlated one-to-one with each value of the quotient.

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