DocumentCode :
1793238
Title :
Combined current sensor and non-invasive displacement measurement for magnetic actuators
Author :
Ezra, Ofer ; Peretz, Mor Mordechai
Author_Institution :
Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
fYear :
2014
fDate :
3-5 Dec. 2014
Firstpage :
1
Lastpage :
5
Abstract :
This study presents a novel design that combines the current sensor with a non-invasive displacement measurement that uses a single circuit for magnetic actuation systems (MAS). The combined sensor reduces the complexity obtains both displacement and dc current sensing with high resolution, fast response and minimum losses. This is achieved by adding a so-called sense inductance in series to the main actuator. The information of the dc current is obtained using a DCR current sensor and the displacement is estimated by the voltage developed across the sense inductance which is proportional to the displacement. The combined sensor has been verified experimentally on a single-axis levitator prototype of 2-2.5 mH inductance and 20 V input voltage. Results in displacement resolution of 100 mV/mm and current measurement of 160 mV/A are experimentally verified.
Keywords :
displacement measurement; electric current measurement; inductance measurement; magnetic actuators; magnetic levitation; magnetic sensors; DC current sensor; DCR current sensor; current measurement; inductance sensing; magnetic actuation systems; non-invasive displacement measurement; single-axis levitator prototype; Actuators; Current measurement; Displacement measurement; Inductance; Inductors; Magnetic levitation; Sensors; Magnetic actuation systems; current sensing; power management;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical & Electronics Engineers in Israel (IEEEI), 2014 IEEE 28th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4799-5987-7
Type :
conf
DOI :
10.1109/EEEI.2014.7005748
Filename :
7005748
Link To Document :
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