Abstract
The bearingless synchronous reluctance motor (BSynRM) is a multi-variable, nonlinear and strong-coupled system. To solve the difficult problem of precise decoupling in electromagnet torque and radial suspension force control, the direct suspension force control (DSFC) method is presented with the reference of direct torque control based on space vector pulse width modulation (SVM), and the direct suspension force control (DSFC) algorithm is deduced. The direct suspension force control (DSFC) system, which a double closed-loop control system of the rotor radial displacement and radial suspension force is constructed to control the radial suspension force directly, is designed and simulated. The simulation results show the stable suspension of the rotor and good performance of the proposed algorithm that realizes the decoupling control of electromagnet torque and radial suspension force.
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