Speed estimation algorithm with specified bandwidth for incremental position encoder
Alecksey Anuchin, Anton Dianov, Dmitry Shpak, Valentina Astakhova, Ksenia Fedorova · International Conference on Mechatronics - Mechatronika · 2016
This paper proposes speed estimation method for the incremental position encoders. This method uses variable angular path to keep the bandwidth and accuracy in the specified range regardless of the current speed. This paper also describes existing speed estimation methods, their strong and weak points. Moreover, non-idealities of the incremental encoders are discussed and compensation algorithm is proposed. Proposed speed estimation algorithm uses period-based calculation method with the variable angular path. The experimental results obtained in the flux-vector control system of a Permanent Magnet Synchronous Motor (PMSM) prove feasibility and show perfect performance of the algorithm even in the low speed range at startup.