Control system for an induction electric motor

U ovom radu teoretski su opisani principi rada i struktura suvremenih elektromotornih pogona, koji su najčešće temeljeni na asinkronim motorima i frekvencijskim pretvaračima. Nadalje, predstavljen je dinamički model asinkronog stroja te su opisani principi transformacije koordinatnih sustava statora i rotora zbog toga jer vektorski sustav upravljanja zahtjeva uvođenje zajedničkog koordinatnog sustava pričvršćenog za rotor. U završnom dijelu rada projektiran je regulacijski krug struje i brzine vrtnje uz primjenu kriterija optimuma dvostrukog odnosa, a rezultati simulacija prikazani su grafovima.This thesis theoretically discuss the operating principles and structure of modern electric motor drives which are mostly based on induction motors and frequency converters. Furthermore, a dynamic model of an induction machine is presented, and the principles of transformation of stator and rotor coordinate systems are described since the field oriented control system requires the introduction of a common coordinate system attached to the rotor. In the final section, a control circuit of the current and speed of rotation was designed using the criterion of the damping optimum, and the results of the simulations are presented graphicaly