SELF-STARTING OF SYNCHRONOUS MOTORS WITH COMPENSATION INERTION OF THE EXCITATION CONTOUR

Abstract

The actual scientific problem is solved in the work, which consists in the development, theoretical and experimental researches of devices for self - starting of synchronous motors with compensation of inertia of excitation circuit. The aim of the work is to increase the reliability of the self-starting mode of synchronous motors of responsible mechanisms to maintain the continuity of complex technological processes. In the event of natural disasters and natural disasters, power outages can cause long-term disruptions of technological processes, large material losses, and in some cases fires and explosions, which can lead to human casualties and significant economic damage.
 Under these conditions, the mode of restarting synchronous motors must be used to power the responsible electric drives of mechanisms, such as mine fans, water pumping stations.
 To limit the dynamic loads, it is necessary to have the smallest possible value of e.r.s. stator SD in order to limit the switching current, which can be achieved by using various methods and means of extinguishing the field, increasing the time of introduction of automatic re-inclusion or automatic inclusion of the reserve. The calculated dependences of the self-starting modes of SD when extinguishing the magnetic field due to the inclusion of capacitive energy storage devices are obtained. The developed device for self-starting of SD with a capacity of 1000 kW of the drive unit of the pump unit with ENE was implemented at the pumping station of the Dnieper Metallurgical Plant. The efficiency of the developed device does not depend on the presence of voltage that supplies the excitation system in the self-starting mode. The use of ENE in the excitation circuit provides compensation for the inertia of the OZ and increase the input coin and intensive quenching of the magnetic field. The developed devices provide reliable self-starting of synchronous electric drives of mechanisms with continuous technological processes regardless of the presence of voltage in the power supply system of the exciter.