Визначення динамічних індуктивностей асинхронного двигуна з урахуванням процесів насичення

Abstract

UK: Встановлена математична залежність між динамічними індуктивностями асинхронної машини та параметрами насичення, що є необхідним при оптимізації енергетичних характеристик в залежності від навантаження на електропривод при роботі зі зниженим значенням модуля вектора потокозчеплення ротора. Проведене дослідження виконано в загальному вигляді, що дозволяє використовувати його результати для асинхронних двигунів різних серій. EN: Definition of dynamic inductances of the asynchronous engine with regard to processes of saturation Development of mathematical model of asynchronous machines in (d, q) coordinate system with taking into account the saturation of magnetic circuits is performed. In the paper, we used the method of dynamic inductances, which is connected with the use of a systematic study of motor properties. An analytical model of asynchronous motor magnetic circuit, which is taken into account action of the tangential and radial dynamic inductances is created. On the basis of this the sensor dynamic inductances of rich machine, which was recorded in (d, q) coordinate system of equations of rotor and stator circles of asynchronous motor with the saturation were built. The author suggests to use the method of dynamic inductances at construction of asynchronous engine mathematical model, that allows to take into account the saturation of the main magnetic path for the modes with a wide range of changes in the flow of mutual induction between the stator and the rotor, saturation flow path, the scattering modes that are characterized by large current circuits of the machine, induction, due to processes of saturation, between mutually perpendicular to the contours of the machine, as well as the joint saturation worker thread and threads scattering modes that are characterized by the significant size of the workflow and large values of currents contours of the machine. The mathematical model allows to take into account the change of the magnetic state of asynchronous motor as necessity to build adequate systems of control drives and driving.