Projektowanie mikrosilnika z fazą zwartą z wykorzystaniem metody polowej

Analysed object is an induction micromotor with a short-circuited auxiliary phase (shaded-pole micromotor - SPM). The motor rating data are: output power 3 W, two poles, one short-circuited coil per pole. Due to flat – parallel distribution of the field and radial direction of flux in SPM, the computational analysis was limited to the cross section plane. Field calculations were done with OPERA 2d software, using finite element method. Basing of numerical simulations several models of the SPM motor have been defined. They were different in: topology of the magnetic shunt, the number of short-circuited coils per pole, also the number and shape of rotor’s rods. Taking into account the manufacture conditions of the SPM motor, the shunt set up and geometry were proposed. The optimal solution of motor’s magnetic circuit with the largest value of flux density in air gap and also the largest starting torque has been achieved basing on fixed overall dimensions.