Мультиградиентность полей в массиве ротора шнекового электромеханического преобразователя

Abstract

С помощью численного моделирования проведен анализ величин, характеризующих мультифизические процессы в активных частях шнекового полифункционального электромеханического преобразователя. Представлены зависимости распределения векторного магнитного потенциала, напряженности электрического поля, электропроводности, механических напряжений, температуры и градиентов соответствующих величин по глубине, а также вдоль длины полого ферромагнитного ротора. Результаты моделирования подтверждают возможность концентрации тепловыделений в межмодульной и концевых зонах шнекового электромеханического преобразователя.

For polyfunctional electromechanical converters in which the active moving parts at the same time experiencing the combined impact of several types of loading, there is an urgent need to address the problems of forecasting and monitoring the change of parameters and characteristics. Accurate modeling requires joint solving electromagnetic, thermal and mechanical problems. Electromagnetic problem is solved with respect to the magnetic vector potential. Calculation of the rotor deformation associated with magnetoelastic, carried out by a separate procedure. The temperature field and steady-state heat conduction problem we consider as composite wall and any number of fuel elements and the cooling media. With the help of numerical simulation analysis of quantities characterizing multiphysics processes in the active parts of screw polyfunctional electromechanical transducer. The dependences of the magnetic vector potential distribution, electric field strength, conductivity, mechanical stress, temperature, and gradient values corresponding to the depth and along the length of the hollow ferromagnetic rotor. The simulation results confirm the possibility of heat generation concentration in the inter-module and the end zones of the screw electromechanical transducer. The distribution function of the mechanical compressive stresses along the ferromagnetic rotor is formed as a result of two factors: the temperatureand axial strain magnetostriction. It should be noted the essential values of temperatures (up to 320 °C) in parts of the rotor of the array corresponding to the boundary zones of stators of the motor and brake modules. Changes of distribution gradients possible at the design stage and subsequent manufacturing converters by incremental displacement of one of stators by tangential coordinate.