Title :
Self-sensing methods to drive micro-machines
Author :
Perriard, Y. ; Scaglione, O. ; Koechli, C. ; Persson, J.
Author_Institution :
Swiss Fed. Inst. of Technol., Lausanne
Abstract :
Synchronous motors require sensors in order to control these devices in speed and/or position. Basically, the auto-commutation needs 3 sensors for a 3-phase type actuator. In micro-motors, as there is no more room to place the sensors, self-sensing approach must be used. The motor becomes a sensor it-self and electromagnetic phenomena are analyzed to detect the position of the rotor. These phenomena are magnetic saturation, back-EMF detection, Eddy current analysis and/or magnetic anisotropy variation. The present paper will describe the technique used to drive a micro-motor for Pico-satellite purpose.
Keywords :
commutator motors; machine control; micromotors; synchronous motor drives; 3-phase type actuator; back-EMF detection; eddy current analysis; electromagnetic phenomena; machine control; magnetic anisotropy variation; magnetic saturation; micro-machine drive; motor autocommutation; picosatellite purpose; rotor position detection; self-sensing method; synchronous motors; Actuators; Electromagnetic analysis; Magnetic analysis; Magnetic anisotropy; Magnetic sensors; Micromotors; Perpendicular magnetic anisotropy; Rotors; Sensor phenomena and characterization; Synchronous motors; actuators; anisotropy variation; micro-motors; satellite; self-sensing; synchronous;
Conference_Titel :
Physics of Semiconductor Devices, 2007. IWPSD 2007. International Workshop on
Conference_Location :
Mumbai
Print_ISBN :
978-1-4244-1728-5
Electronic_ISBN :
978-1-4244-1728-5
DOI :
10.1109/IWPSD.2007.4472603
