СИНХРОННЫЙ МАГНИТОЭЛЕКТРИЧЕСКИЙ ПЕРЕМЕШИВАТЕЛЬ ЖИДКОГО МЕТАЛЛА В КРИСТАЛЛИЗАТОРЕ МАШИН НЕПРЕРЫВНОГО ЛИТЬЯ ЗАГОТОВОК СТАЛИ

• Дата: 2014
• Автори: Кондратенко , И.П., Ращепкин , А.П.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут електродинаміки НАН України, Київ 2014
• Теми: перемешиватель; постоянные магниты; непрерывное литье; кристаллизатор
• Онлайн доступ: https://techned.org.ua/index.php/techned/article/view/1115
• Назва журналу: Technical Electrodynamics

For continuous casting machines proposed electromagnetic stirrer in the form of a synchronous motor with a hollow rotor. The rotating magnetic field in the liquid metal magnetic system is excited by a permanent magnet rotor with the stator winding currents. For an arbitrary rotation speed of the liquid metal boundary conditions are derived for the magnetic potential on the surface of the blanks, and found the magnetic field distribution in the cavity stirrer produced by a permanent magnet rotor and currents of the stator winding. Developed an iterative numerical-analytical method for calculating the distribution of the rotational speed of the liquid metal in the mold with synchronous electromagnetic a stirrer. The functional dependence of the maximum velocity of the metal near the crystallization front at the exit of the stirrer and him the power on the frequency a supply current is set. We derive the functional dependence, and formulas for calculating the energy performance of synchronous electromagnetic stirrer in the continuous casting molds. Formulated the requirements for the sustainable operation of synchronous electromagnetic stirrer and eliminate its possible falling out of synchronism. Formulated the requirements to the magnitude of the stator current and the magnitude of the magnetization of permanent magnet excitation system for excitation the magnetic induction given value in a liquid metal. It is shown that for identical versions of magnet excitation system greater a magnitude the magnetic induction in the liquid metal can be created in the mode under excitation. Control modes of the stirrer and the magnitude of the magnetic induction in the liquid metal is achieved varying the voltage of the stator winding. References 6.