An Adaptive Flux and Position Observer for Interior Permanent Magnet Synchronous Motors

The design of an adaptive active flux observer is an open problem, which attracts a lot of scientists from adaptive control and electric drive societies. The design of new observer for the interior permanent magnet synchronous motor is based on the "linear regression plus gradient search" approach. It is proved that the flux observer provides asymptotic convergence of estimation errors to zero. In comparison with known solutions proposed approach gives improved results with guaranteed performance (monotonicity, convergence rate regulation) and allows to regulate the convergence rate via the selection of the adaptation gains. The main feature of the proposed observer, compared to existing ones, is that it is well defined in all operating modes, improving its robustness properties. (C) 2019, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.