Analysis of magnetic flux and static characteristics of synchronous motors with electromagnetic excitation using the finite element method in the ANSYS MAXWELL program

Abstract

Relevance: with the development of computer modeling tools and numerical methods for solving complex analytical problems, the developer has more and more tools suitable for use in everyday practice. At the same time, it is often quite difficult to determine the most effective way to solve a given problem due to insufficient information about the capabilities of a particular software package. The proposed article (intended for) describes the capabilities of the ANSYS Maxwell software package as a tool for analyzing synchronous motors with electromagnetic excitation as applied to the problem of designing an electric motor for a compressor unit at JSC Sirdarya TPP. It is shown that there is a software product on the market that meets the most serious requirements of the developer and researcher, various capabilities of the software package for determining and studying the characteristics of the analysis of synchronous motors with electromagnetic excitation are demonstrated. The results of a comparison of calculations performed using the software package and traditional calculation methods using equivalent circuits are presented, demonstrating the quality of the calculation of the described software package, which confirms its suitability for use not only in the design of electrical machines, but also in the study of electromagnetic processes in various electromechanical devices. 

Aim: the objective of this article is to introduce the reader to modern methods of analyzing the magnetic flux and static characteristics of synchronous motors with electromagnetic excitation using the ANSYS Maxwell software package for electromagnetic calculations as an example.

Methods: the article uses the equivalent magnetic circuit method to calculate the operating characteristics of the machine and the classical analytical theory of electrical machines, which allows for a much faster analysis of the model and the result. A synchronous motor with electromagnetic excitation was chosen as the main option due to its high technology, simplicity of design, proven production methodology, and insignificant effect of the anchor reaction.

Results: to check the quality of the calculation performed by the software package, a test calculation of a synchronous motor with electromagnetic excitation was carried out using known methods. During the test, the magnetic circuit and losses in the electric machine were calculated, operating characteristics and oscillograms of voltages and currents of an idealized system were constructed.