A NOVEL ADJUSTABLE SPEED MOTOR AND COMPUTATION OF ITS STATIC TORQUE

摘要

This paper describes a novel adjustable speed motor, which differs from other motors. It is named as step direct-current motor (SDM). Its magnetic field at rotor different positions was calculated in this paper with the finite element method (FEM). The graph of the contour and the relation curves between flux linkage and current were ploted. The magnetic coenergy is computed using the results of the FEM analysis. According to the theory of magnetic coenergy, when the current is constant, the function between torque and rotor position angle is described.