Khandakzhy K. Electric drive of hoisting mechanisms by the system thyristor converter - motor under emergency modes of the converter

The dissertation seeks to substantiate the requirement for fast response of protective gear for the drive's power circuits in the system of thyristor converter motor of hoisting mechanisms against abnormal currents under various emergency modes of the thyristor converter. Special attention has been given to emergency processes in the drive under abrupt interruption of power voltage. A comparative analysis has been carried out to test the effectiveness of modern fast-acting abnormal current protection gear, recommendations have been given concerning increasing the effectiveness of protection. A versatile mathematical model has been developed allowing research of normal and abnormal modes of the thyristor converter. The mode is used practically to analyze the processes in the drive, as well as in research to select the variants of the drive.