Design and optimization of dc brushless permanent magnet motor

Electric motors with lots of applications in various sectors of industry have unique features such as high reliability, high efficiency, quick acceleration, and are found in very small sizes. Brushless DC motors meet these requirements well. In this study, the design of a brushless DC motor speed limits for the particular application at 1800 rpm was provided that can be equivalent to 140 watts output. The present study intends to increase the power density, efficiency and to reduce engine weight by using the finite element method. According to the analysis of the existing motors and parameter extraction, they were compared using software for high electromagnetic torque and low weight. In this article, we have focused on the permanent magnet by testing different types of magnets and comparing the results of finite element analysis. The existing magnets were made of ceramics with the lowest density, but the permanent magnet in software method has the highest energy density.