Title :
Sensorless position detection of a linear actuator using the resonance frequency
Author :
Maridor, Joel ; Katic, Nikola ; Perriard, Yves ; Ladas, Dimitrios
Author_Institution :
Integrated Actuators Lab. (LAI), Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne, Switzerland
Abstract :
This paper presents a method to detect the position of a linear actuator without any position sensor. The actuator winding has a resonance frequency that is very related to the position of the linear actuator Pmoving part. A sinusoidal scan voltage is superposed to the main voltage. Its frequency is close to the resonance frequency and therefore it is possible to measure the resulting scan current amplitude that allows position detection.
Keywords :
linear machines; actuator winding; linear actuator; resonance frequency; sensorless position detection; Contactors; Hydraulic actuators; Laboratories; Permanent magnet motors; Position control; Proportional control; Pulse width modulation; Resonance; Resonant frequency; Voltage;
Conference_Titel :
Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5177-7
Electronic_ISBN :
978-4-88686-067-5
DOI :
10.1109/ICEMS.2009.5382641
