DocumentCode :
2531088
Title :
Estimation of the rotor position of a servo drive at zero stator frequency
Author :
Caporal, Roberto Morales ; Pacas, J. Mario
Author_Institution :
Postgrad. Studies & Res. Div., Technol. Inst. of Apizaco, Apizaco, Mexico
fYear :
2010
fDate :
22-25 Aug. 2010
Firstpage :
67
Lastpage :
72
Abstract :
This paper introduces a technique to estimate the angular position of the rotor of an industrial servo motor with rotor saliency. The estimation technique is based on injection of Test Voltage Signals (TVSs). The TVSs generate stator current transients which are exploited in order to acquire the required rotor position information. Then, the obtained information is processed through a tracking observer to extract useful position signals. Following this strategy no extra hardware, especial current transducers or connections are needed in comparison with a standard servo drive with an encoder. The technique is effective at zero and very low stator frequencies of operation, where the back EMF is very low and model based sensorless techniques commonly fail. Experimental results at very low and zero stator frequency of operation verify the effectiveness of the investigated sensorless strategy.
Keywords :
observers; reluctance machines; rotors; sensorless machine control; servomotors; stators; angular position estimation; back EMF; industrial servo motor; rotor position; rotor saliency; sensorless control; servo drive; stator current transients; synchronous reluctance machines; test voltage signals; tracking observer; zero stator frequency; Inductance; Observers; Rotors; Stators; Torque control; Trajectory; Digital signal processor; cross-saturation; rotor anisotropies; sensorless control; synchronous reluctance machine; torque control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Congress (CIEP), 2010 12th International
Conference_Location :
San Luis Potosi
Print_ISBN :
978-1-4244-8066-1
Type :
conf
DOI :
10.1109/CIEP.2010.5598832
Filename :
5598832
Link To Document :
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