Analysis and design of full-order flux observers for sensorless induction motors
Hinkkanen, M.
Power Electron. Lab., Helsinki Univ. of Technol., Espoo, Finland;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2004
Volume: 51,
Issue: 5
On page(s): 1033- 1040
ISSN: 0278-0046
INSPEC Accession Number: 8135781
Digital Object Identifier: 10.1109/TIE.2004.834964
Current Version Published: 2004-10-04
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.
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