Použití vícerychlostních asynchronních elektromotorů

Abstract

This Bachelor thesis occupies with multi-speed asynchronous electric motors and their use. The first part analyses the methods which can be used to change the number of poles of induction machine and its electrical and mechanical properties. This part also contains detailed instruction for construction of torque speed characteristic from values which gives producer. In the next part is designed fan drive and crane travel drive whose result is construction of torque speed characteristic of motor and driven equipment. Next point deals with connection of multi-speed asynchronous electric motors to electrical network and their methods of protection. At the end of Bachelor thesis author devises control of both aboved-mentioned drives.