Development of a thin electromagnetic wobble motor

The purpose of this work is to develop a thin electromagnetic wobble motor with big torque which is thinner than conventional motors and can be applied to portable electric equipments. We have developed a basic model of the motor which is 30mm in diameter and 5mm in thickness. In this paper, first, the basic structure and control method are presented. Next, design of the electromagnets and the three types of gear pairs which have different pressure angles for reduction mechanism are presented. Finally, the motor drive experiments using two types of driving method; one is the full-pitch drive and the other is the half-pitch drive, and three types of gear pairs are shown. As a result, the motor works successfully.