DESIGN AND PERFORMANCE COMPARISON OF FOUR-POLE BRUSHLESS DC MOTORS WITH DIFFERENT POLE/SLOT COMBINATIONS

Authors : Cemil Ocak

Pages : 69-78

View : 15 | Download : 8

Publication Date : 2019-01-01

Article Type : Research Paper

Abstract :When the design process of the brushless motor is examined, attention must be paid to the correct choice of magnet material, internal or external rotor structure and the choice of core and winding structure. In addition to all these, the number of phases, the number of rotor poles, and the choice of slots configurations depending on them also have great importance. For this reason, to achieve optimum design, it is necessary to analyze all possible designs with different pole/slot configurations that can accommodate similar power and speed expectations. In this study, three different designs have been realized with different pole/slot configurations for four-pole, internal rotor brushless DC motors, which are frequently used in many different applications today. Designed motors have been analyzed with Finite Element Method to obtain the cogging torque, efficiency and active material costs. All motors that are analyzed have 100 W, 3000 rpm, 4/6, 4/12 and 4/15 pole/slot configurations respectively.
Keywords : brushless DC motor, pole slot combinations, efficiency, internal rotor