Dimensioning of the magnetic circuit and the characteristics of a four pole asynchronous motor power 30 kW

U ovom završnom radu proračunava se magnetski krug i karakteristika četveropolnog asinkronog motora snage 30 kW, napona 400 V i frekvencijom 50 Hz. Na početku proračuna u tablicama su dane dimenzije motora i ostali podaci potrebni za sam proračun. U radu smo odredili protjecanje zračnog raspora, magnetski napon zubi statora i rotora, faktor zasićenja, magnetski napon jarma statora i rotora, struju magnetiziranja, gubitke u željezu i bakru, mehaničke gubitke, struju praznog hoda, rasipnu vodljivost utora statora i glave namota, induktivni otpor statora, induciranu elektromotornu silu praznog hoda, radni otpor prstena i štapa, rasipnu vodljivost utora rotora, prstena i glave zuba statora, rasipne reaktancije štapa i prstena te glavnu reaktanciju i nadomjesni otpor za gubitke u željezu. Nakon toga su određene karakteristike motora uz napajanje s promjenljivim naponom i frekvencijom.In this final work is calculated the magnetic circuit and the characteristics of a four pole asynchronous engine power 30 kW, voltage of 400 V and frequency 50 Hz. At the beginning of the calculation in the tables are given the dimensions of the engine and other data necessary for my calculation. In this work we determine the flow of air gap, magnetic voltage stator and rotor teeth, saturation factor, voltage magnetic yoke of the stator and rotor, magnetizing current, losses in the iron and copper, mechanical losses, no load current, a bulk conductivity of stator slots and winding head, reactance of the stator, induced emf idling, the resistance of the ring and rod, a bulk conductivity of the rotor slots, rings and head tooth stator leakage reactance rod and ring and the main reactance and equivalent resistance losses in the iron. After that, the particular characteristics of the engine with the power supply with variable voltage and frequenc