STRUCTURE OF IRON CORE FOR DC SLOT-LESS CORE MOTOR

摘要

PURPOSE:To improve iron loss and saturation magnetic flux density, and to reduce cost by using a sintering material consisting of a silicon steel at a specified ratio as a core material and forming cores divided in the radial direction and the thrust direction by the material. CONSTITUTION:A core 1 is divided into two in the radial direction, and constituted by fixing split pieces 2, 3 by adhesives. A sintering material composed of 3-10wt% silicon steel (an Fe-Si alloy) is employed as a core material. Silicon is weight distribution of 7wt% is added to iron such as pure iron powder in a shape such as the substance of ferrosilicon or silicon powder, and raw material powder to which a substance such as 1wt% zinc stearate is added and mixed is used as a molding assist.