Mathematical model of dynamics of two-coil synchronous electromagnetic impact machine with spring reversal of striker

摘要

The development of modern methods of analysis and synthesis of electromechanical systems, including the main structural link of which is an electromagnetic drive, causes an increased interest in the creation and improvement of mathematical models of machines and devices that most objectively reflect their dynamic state in various technological processes [1, 2]. The increase of the efficiency of such electric drives is possible only if the interconnected parameters of the electrical, magnetic and mechanical subsystems are rationally selected, and their operation is analyzed, and the need for dynamic calculation arises at the engineering stage. An object of research is an electromagnetic shock unit of a two-coil synchronous electromagnetic machine with a spring reversal of a striker containing a multimass oscillatory system with elastic connections and receiving power from a single-phase voltage source of industrial frequency by a half-wave rectification scheme. A mathematical model of the dynamics of an electromagnetic shock unit has been created, which provides broad possibilities for a comprehensive analysis of electromechanical processes during the excitation of periodic shock impulses of forces and interaction with a deformed medium. The advantage of the model is the ability to take into account a large number of interrelated factors, depending on the speed of the striker and the frequency of the shock impulses of forces, the degree of mobility of the inertial masses and the properties of the elastic bonds of the mechanical system, the magnetic properties of materials, accompanied by various kinds of energy losses. The methods and means of structural modeling in Matlab Simulink are an example of a numerical implementation of a shock-junction model with energy losses. The verification of the mathematical model is performed by comparing the calculated values of the output indicators with the results obtained on the physical model.