Analysis and design of full-order flux observers for sensorless induction motors
Hinkkanen, M.
Industrial Electronics, IEEE Transactions on
Volume 51, Issue 5, Oct. 2004 Page(s): 1033 - 1040
Digital Object Identifier   10.1109/TIE.2004.834964
Summary: 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.

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