New sensorless vector control using minimum-order flux state observer in a stationary reference frame for permanent-magnet synchronous motors
Shinnaka, S.
Dept. of Electr. Eng., Kanagawa Univ., Yokohama, Japan;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: April 2006
Volume: 53,
Issue: 2
On page(s): 388- 398
ISSN: 0278-0046
INSPEC Accession Number: 8875896
Digital Object Identifier: 10.1109/TIE.2006.870729
Current Version Published: 2006-04-03
Abstract
This paper proposes a new sensorless vector control method that can be applied to both of salient-pole and nonsalient-pole permanent-magnet synchronous motors (PMSMs). The proposed method estimates the phase of a rotor flux by a newly developed state observer in a stationary reference frame for sensorless vector controls of PMSMs. The flux state observer has the following attractive features: 1) it requires no steady-state conditions for the dynamic mathematical model of the motor; 2) its order is the minimum second; 3) a single observer gain is simply constant over a wide operating range and can be easily designed; 4) it utilizes motor parameters in a very simple manner; and 5) its structure is very simple and can be realized at a very low computational load. The proposed speed-estimation method, which exploits the inherent physical relation of integration/derivation between phase and speed, is very simple and can properly estimate rotor speed. The usefulness of the proposed method is examined and confirmed through extensive experiments.
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