Efficiency improvement in induction motor by slitted tooth core design

Abstract

Original scientific paper In this study, a new design was suggested in order to improve the performance of induction motors. In the proposed design, slits were applied in the middle of stator and rotor teeth. In these slitted models, the depth and width of slits were optimized with Finite Element Method Magnetics (FEMM) software using Finite Elements Method (FEM). To show performance improvement, suggested motor model and a reference motor model were compared at the rated operating point for the values such as input and output power, input current, power factor, efficiency and losses. Because of the decreases in both iron and copper losses, total losses in motor were reduced and the efficiency for rated operating point was improved by 1,869%. In the modelling, 3 kW squirrel-cage induction motor was used. Keywords: induction motor efficiency; motor losses; slitted tooth core design Porast učinkovitosti asinkronih motora pomoću dizajna jezgre s procijepljenim zubomIzvorni zanstveni članak U ovom istraživanju predložen je novi dizajn kako bi se poboljšala učinkovitost rada asinkronih motora. U predloženom dizajnu primjenjeni su procijepi u sredini zubi statora i rotora. U ovim procijepljenim modelima dubina i širina procijepa su optimizirani uz pomoć programa Magnetska metoda konačnih elemenata (FEMM) i koristeći Metodu konačnih elemenata (FEM). Za prikaz poboljšanja izvedbe, predloženi model motora i referentni model motora su uspoređeni u definiranim pogonskim tačkama za vrijednosti kao što su ulazna i izlazna snaga, ulazna struja, faktor snage, efikasnost i gubitci. Zbog smanjenja gubitaka željeza i bakra, ukupni gubitak u motoru je smanjen, a povećana je efikasnost za definiranu pogonsku tačku za 1,869%. U modeliranju korišten je 3 kW kavezni asinkroni motor.

Optimal Design and Cogging Torque Minimization of a Permanent Magnet Motor for an Electric Vehicle

“…This step is carried out to validate the obtained optimization results. FEA is a powerful tool used by reserchers to analyse electromagnetic devices [32][33]. In our work, the magnetic field problems solution is obtained using the magnetic vector potential (A).…”