Induction motors, often referred to as the workhorse of the industry, play an important role in production today. Therefore, it's important to diagnose any faulty induction motor prior to failure to avoid costly and time consuming production stops.This thesis compares methods for diagnosing induction motors in operation, MCSA, Park's vector approach and the standard method used by Swedish industries today. By simulating broken rotor bars and short-circuit in one of the windings, each method is tested and the results are compared using matlab.The results need further verification due to uncertainties of the condition of the test motor, even though the experiment gives a hint of the different advantages of each method. A combination of the methods should be able to tell if the motor needs further examination..

Schur AB är ett företag i Eksjö som erbjuder sina kunder lösningar inom post- och tidningshantering. Bland dessa lösningar ingår ett transportsystem kallat Gripper TGG 3200 vilket transporterar tidningar från exempelvis pressen till olika enheter i packsalen. Transportsystemet drivs av ett antal Asynkronmotorer, antalet motorer variera med avseende på hur lång transportsträckan är. Då drivstationer och motorer är de dyraste komponenterna i transportsystemet vill man minimera antalet av dessaSystemet är uppbyggt av aluminiumprofiler som gör att det kan skräddarsys efter kundens behov. I profilerna rullar enheterna som transporterar tidningen i en sammanlänkad kedja.

The purpose with this thesis is to get a compilation of all the critical bolted joints of all enginesproduced at LV Motors. ABB LV Motors produces induction engines with seven shaft heights. Eachengine size exists several variants of components ex. standard shield and flange shield. Depending onwhich components the engine is equipped with arises various types of strains in the engine's parts,certain assembly ways are more favourable than other.The most critical parts in the engine from a mechanical point of view are the screw units betweenshield/stator, feet/stator and bearing cover/shield.