吸引・反発力を利用するハイブリッド形マイクロギャップ高トルクモータの研究

Abstract

It is very effective for developing a high torque motor to keep air gap as small as possible between a rotor and a stator. By polishing the surfaces of cylindrical rotor and stators impregnated with epoxi resin, we developed a high torque motor of a hyblid type with extremely small air gaps which has no usual bearings. The rotor and stators with smooth surface play the role as a bearing.All stator poles of VR motors are not simultaneously excited, since reversal torque is generated when rotor teeth leaves stator teeth. As only attraction force is employed, halves of stator poles don't generate torque.We investigated a uniqe hyblid type motor with rare-earth bar magnets in rotor slots, in which all stator poles generate torque by employing not only atrraction force but also repulsion force. Analizing magnetic field of the hyblid motor with MAGNA/FIM, magnetic field analising software, optimum air gap geometry were aquired. We could develop a greatly higher torque motor than a VR type motor with the same size which was developed before [7].