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., Espoo, 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 :
adaptive systems; induction motor drives; linearisation techniques; machine vector control; magnetic flux; observers; flux estimation; linearized model; observer gain; sensorless induction motor drives; speed-adaptation gain; speed-adaptive full-order flux observers; Algorithm design and analysis; Electric resistance; Inductance; Induction motor drives; Induction motors; Magnetic flux; Observers; Rotors; Saturation magnetization; Stators; Flux estimation; full-order adaptive observer; induction motor drives; speed sensorless;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2004.834964
