The article investigates the possibility of using pulse-width control of parametric models of induction heaters, shows the models of pulse-controlled resistive elements and the results of simulation of their transient modes. A feature of the proposed circuit solutions is the use in macromodels of ideal keys controlled by the mode parameters of the circuit. In the environment of a circuit simulator, virtual PWM models are constructed that are suitable for use, both in the transient and in the steady state. The non-reactive nature of the modules ensures the accuracy and speed of the device in a wide frequency range, while observing the conflict-free behavior of the computing core with a variable iteration step. The modes of the device models are investigated in the time domain, the characteristics of the dynamics of control and controlled parameters are shown. The advantages and disadvantages of PWM control of parametric models are noted.

The article proposes an MHD device designed to automate the management of casting aluminum melt from a stationary mixer. The product is made on a modular basis, similar to an induction detachable unit, has three magnetic cores with windings. The design of the MHD device, the location of the magnetic cores, and the features of connecting the windings to the network turn it into a universal unit. The location of the casting trough inside the closed cores allows the device to be used as an MHD pump for aluminum melt. Methods of connecting the windings make it possible to realize the function of dosing the melt using automated process control systems. Pumping the melt through the chute when placing the module between two sockets ensures stirring of the melt in the mixer. The use of a group of single-phase transformers in three-phase switching ensures the movement of aluminum in the channel by creating traction forces in the melt. The presence of windings, allowing for opposition, puts the electromagnetic module into transformer-inductor mode, improving energy efficiency in traction modes, providing melt heating beyond the furnace and maintaining aluminum temperature.

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The article proposes a method for single-phase power supply of a three-section induction heater for aluminum ingots before extrusion. The solution allows you to flexibly control the heating mode of each section. The peculiarity of the synthesized mode is to increase the uniformity of heating the methodical load at the joints of the sections when replacing the three-phase winding circuit with a single-phase one. Changing the circuitry reduces the phase shifts of currents in adjacent sections. Uneven power distribution between the coils is proposed to be realized by local resonances in the windings. The resulting power factor of the inductor, close to unity, is provided by a common capacitor bank. The set of established modes of an induction heater was investigated using a simulation system built on the basis of a hybrid analysis. The numerical experiment was carried out in a specialized software environment based on a macromodel created using controlled sources. The achieved positive result from the modification of the device is evaluated by comparing the vector diagrams of the operating parameters for the initial and corrected states.

The paper presents the results of energy efficiency and traction evaluation of linear induction machines for with molten aluminum recycling furnaces. Ansys Maxwell software was used for the synthesis of 3D parametric models of electromagnetic fields for a large air gap furnace. Interchangeable modules of three-phase transverse and longitudinal field inductors were used as a subsystem of a parametric model. Both inductor models include invertor low frequency power supply. Transverse and longitudinal field inductors have been designed with similarity principles. A stationary electromagnetic mode and power parameters has been modeled without taking melt hydrodynamics into account. Linear induction transverse-field machines have demonstrated higher efficiency.