Development of Engineering Method for Calculation of Magnetic Systems for Brushless Motors Based on Finite Element Method

摘要

The development of systems with permanent magnets requires improving their calculation methods. At present, it is impossible to create complex devices with high energy parameters without accurate methods of calculation of the magnetic field and optimization calculations. The calculation of the magnetic field demands the complex digital model with using the finite element method. The optimization methods demand a lot of calculation cycles when optimal parameters are selected. So, on the one hand, the mathematical model has to have a very simple method of calculating the magnet field parameters, but on the other hand, this model must be very accurate. We have a conflict in this case. Simple models have a bad precision but they calculate the magnet parameters very quickly and it is possible to use these methods for optimization circles. Complex methods using the Ansys, Cosmos etc. software have an excellent accuracy, but they demand great computer resources and a lot of time for their operation. It is impossible to use them for optimization circles. In this article, the method, which can solve this problem, is suggested. The method is based on the finite element method to create the digital model of magnet system, but for the realization of this method not a large number of elements is used. So, this method is simple and has a good accuracy. It is possible to use this method for optimization models to design systems with permanent magnets.