{"title":"Design of a Non-linear Observer for VSI Fed Synchronous Motor","authors":"P. Ramana , K. Alice Mary, M. Surya Kalavathi, M. Phani Kumar","country":null,"institution":"","volume":56,"journal":"International Journal of Electrical and Computer Engineering","pagesStart":928,"pagesEnd":932,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/3403","abstract":"This paper discusses two observers, which are used\r\nfor the estimation of parameters of PMSM. Former one, reduced\r\norder observer, which is used to estimate the inaccessible parameters\r\nof PMSM. Later one, full order observer, which is used to estimate\r\nall the parameters of PMSM even though some of the parameters are\r\ndirectly available for measurement, so as to meet with the\r\ninsensitivity to the parameter variation. However, the state space\r\nmodel contains some nonlinear terms i.e. the product of different\r\nstate variables. The asymptotic state observer, which approximately\r\nreconstructs the state vector for linear systems without uncertainties,\r\nwas presented by Luenberger. In this work, a modified form of such\r\nan observer is used by including a non-linear term involving the\r\nspeed. So, both the observers are designed in the framework of\r\nnonlinear control; their stability and rate of convergence is discussed.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 56, 2011"}