Title :
Sensorless Control of Induction Machines by Using PWM Harmonics for Rotor Bar Slotting Detection
Author :
Raute, Reiko ; CARUANA, Cedric ; STAINES, Cyril SPITERI ; Cilia, Joseph ; Sumner, Mark ; Asher, Greg
Author_Institution :
Dept. of Ind. Electr. Power Conversion, Univ. of Malta, Msida
Abstract :
The paper presents the use of the inherent high frequency PWM harmonics for sensorless control of AC machines. The amplitude and position of the PWM voltage harmonics cannot be controlled and depends on the fundamental machine operation. The paper examines the feasibility of sensorless control based on the extracted rotor bar slot position information in the case of a cage induction machine. The position signal demodulation and compensation schemes used are discussed. Experimental results of sensorless torque, speed and position control at loaded conditions including zero excitation and zero speed are given for an off-the-shelf induction machine.
Keywords :
PWM invertors; angular velocity control; asynchronous machines; compensation; machine vector control; position control; power conversion harmonics; rotors; torque control; PWM inverter; cage induction machine sensorless control; compensation schemes; high frequency PWM harmonics; position control; position signal demodulation; rotor bar slotting detection; speed control; torque control; vector control; AC machines; Frequency; Induction machines; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Rotors; Sensorless control; Testing; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE
Conference_Location :
Edmonton, Alta.
Print_ISBN :
978-1-4244-2278-4
Electronic_ISBN :
0197-2618
DOI :
10.1109/08IAS.2008.230