Title :
Impedance saliency detection for sensorless control of AC machines utilizing existing PWM switching harmonics
Author :
Raute, R. ; Caruana, C. ; Cilia, Joseph ; Staines, C. Spiteri ; Sumner, M. ; Asher, Greg
Author_Institution :
Malta Univ., Msida
Abstract :
The following paper describes the basic idea of making use of high frequency signals, present in a PWM inverter drive system, for analyzing the machine impendence saliency. The proposed method focuses particular on the extraction of rotor bar spatial salience modulation. The final target is to use this information in order to reconstruct the mechanical rotor position. No additional signal injection is applied, only the inherent present high frequency signals (PWM carrier harmonics) were used.
Keywords :
PWM invertors; asynchronous machines; machine control; power conversion harmonics; switching convertors; AC machines control; PWM inverter drive system; PWM switching harmonics; high frequency signals; impedance saliency detection; machine impendence saliency; mechanical rotor position; rotor bar spatial salience modulation; sensorless control; induction machine; pulse width modulation (PWM); sensorless control; variable speed drive; vector control;
Conference_Titel :
Power Electronics, Machines and Drives, 2008. PEMD 2008. 4th IET Conference on
Conference_Location :
York
Print_ISBN :
978-0-86341-900-3
