Provozní stavy asynchronních elektromotorů napájených z měničů frekvence

Abstract

This diploma work deals with the description of operational status of asynchronous electric motor when energizing from frequency converters. The first part contains a brief description of motors and individual parts of frequency converters, both from the constructional and functional point of view. Another content of the first part is a theoretical analysis of individual operational status of asynchronous electric motor when energizing from the frequency converter. The second part of the work, called experimental, brings results of measurement on real electric motor, which is energized from frequency converter. Specifically, it deals with the measurement of current course at motor firing, with measurement and calculation of torque characteristic at the frequency control and also with measurement and calculation of torque characteristic at d.c. braking.