In order to monitor the state of permanent magnet(PM) in PMSM, a design strategy of adaptive observer is proposed. The observer is built bases on the theory of Popov's hyper-stability theory. Then the influences of parameter variations on the PM flux linkage estimation are investigated. It is shown that the q-axis inductance Lq mismatch has the most serious influence on the flux estimation. To reduce the sensitivity of Lq, a flux adaptive observer combined with Lq is proposed in this paper. Experimental results verify the effect of this method.
Permanent magnet flux linkage adaptive observer for permanent magnet synchronous motor
2014-08-01
779404 byte
Conference paper
Electronic Resource
English
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