Vliv opětovného rozběhu asynchronního motoru na jeho rozběhové charakteristiky

Abstract

This bachelor’s thesis focuses on repeated starting of induction motor. At first it describes induction motors in general. It means their construction, principles of operation, scheme, speed-torque characteristics and ways of starting motors. Then it deals with transient operation in simple RL circuit. The description of transient operation in induction motor follow and one possible solution of these operations will be presented. A scheme is then computed by substracting the measured characteristics of open-circuit test from short-circuit test. Modelling of repeated starting with various values for time is carried out in ATP programme afterwards. Then the measurement of repeated starting is undertaken and peak currents and time taken for starting will be substracted. At the end the comparison of individual types of starting will be presented.