This paper studies the application of the Unscented Kalman filter (UKF) for a sensorless permanent-magnet synchronous motor (PMSM) drive. The principle of the UKF is reviewed and its adaptation to the PMSM model in the rotor reference frame is explained. For evaluation of drive performance a comparison with the classical Extended Kalman filter (EKF) based estimation method is made. The simulation results indicate that the UKF in general gives more accurate tracking of the rotor position than the EKF for constant torque operation. Besides, the UKF drive retains control over a longer standstill period. With the UKF-based sensorless PMSM drive, however, the proportional gain of the speed controller needs to be carefully chosen to avoid rotor hunting subsequent to step load changes.
The paper presents the design and analysis of a longitudinal flux linear switched reluctance motor (LSRM) for high precision position control applications. The inductance and force profiles of the LSRM are investigated using an analytical magnetic circuit analysis method and finite element method (FEMI). Using FEM, the design of a LSRM is optimized for a semiconductor equipment application with1a high precision position control. Results from both simulation and experimental testing are also presented.
estimations are based on the back electromotive force (BEMF) method in Sensorl-ess con-trailer the afl-stator reference frame. Two estimation strategies, one using the steady-state equations and the other using the dynamic equations, are speed com,a Speed compared. Extensive simulation results are given and discussed. controllecontrollerl
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.