Abstract
The article is concerned with linear electromagnetic motors (LEMM) widely used in engineering to create mechanisms with reciprocating movement of working bodies. The features of physical processes in such motors are shown. It is noted that electromagnetic and electromechanical transient processes occur in the operating modes of the motor, which are described by a system of nonlinear equations. This complicates the mathematical modeling of linear electromagnetic motors. A literature review devoted to the modeling and calculations of such motors is performed. It is shown that most researchers calculate the characteristics of motors based on solving field problems using the finite element method. The need for further development of mathematical models and methods for calculating LEMM is substantiated. A new approach to modeling physical processes in LEMM is proposed, based on a more complete use of the modern application software packages (Elcut, Mathcad and Matlab) capabilities in the development of such motors. The main idea of the proposed method is that at the preliminary stage of calculations a database is created that links the main electromagnetic parameters (current in the winding and flux linkage) with LEMM power characteristics. Using such a database makes it possible to automatically calculate the system of nonlinear equations describing electromechanical transient processes. The presented technique is used to show the example of calculating a linear electromagnetic impact motor prototype. At each stage of the study, the calculation results are compared with the experimental data obtained during testing of the motor prototype. Comparison of the motor calculated and experimental characteristics confirms that the correct and efficient approach was chosen. The proposed approach to mathematical modeling of linear electromagnetic motors has proven its effectiveness and is recommended for practical use in the development of such machines.
Keywords
linear electromagnetic motor, physical processes, mathematical modeling, calculation results, comparison with experiment
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