Quasi-optimum Control of Positional Electric Drive with Synchronous Reluctance Motor by Criterion of Minimum Electrical Losses

Based on a simplified analytical description and equivalent circuit of synchronous reluctance motor, quasi-optimal motion profiles for a positional electric drive are investigated. The criterion of optimization is a minimum of electric losses in the stator winding. The comparative analysis of triangular, parabolic and trapezoidal profiles is carried out. It has been shown that possible minimum losses are determined by the product of load torque for preset time of movement. For losses minimization it is offered to execute the referenced movement not for precisely defined time, but for the optimum time, which changes as a function of load torque.