Title :
Analysis and design of full-order flux observers for sensorless induction motors
Author :
Hinkkanen, Marko
Author_Institution :
Power Electron. Lab., Helsinki Univ. of Technol., Finland
Abstract :
This paper deals with the flux estimation for sensorless induction motor drives. The linearized model of the speed-adaptive full-order flux observer is applied to help choosing the observer gain and the speed-adaptation gains. It is shown that the linearized model reveals potential instability problems that are difficult to find by other means. An observer gain and a method to vary the speed-adaptation gains in the field-weakening region are proposed. Experimental results show stable operation in a very wide speed range.
Keywords :
induction motor drives; machine vector control; magnetic flux; observers; parameter estimation; stability; 2.2 kW; field-weakening region; flux estimation; full-order flux observers; linearized model; observer gain; potential instability problems; rotor flux oriented controller; sensorless induction motors; speed-adaptation gains; speed-adaptive full-order flux observer; Induction motor drives; Induction motors; Laboratories; Noise robustness; Observers; Power electronics; Rotors; Stators; Torque control; Voltage;
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
DOI :
10.1109/IECON.2002.1187485
