2015 年 81 巻 831 号 p. 15-00155
Recently, cooling fans have been used for not only general industrial machines but also precision machines, such as medical care products and optical equipment, and these generate more requirements about vibration limitations. The main vibration of cooling fans caused by rotating unbalance and resonance has been reduced, so electromagnetic vibration, which was not considered before, now has to be reduced. The purpose of this study is to control the electromagnetic vibration of 2 poles three-phase induction motors that rotate fast, such as for cooling fans. In this paper, it is shown that the type of magnet wire specification controls electromagnetic force and electromagnetic vibration by using the simulation results of a 2 dimensional magnetic finite element method (FEM), as well as a 3 dimensional structural FEM, both of 2 poles three-phase induction motor that has an output of 70W.
