Stator yoke

Abstract

Abstract PURPOSE:To simplify the structure of a stator yoke and to improve the efficiency of a motor by integrally forming a disc-shaped bottom with a cylindrical side wall to become a magnetic shielding wall in a cup shape, and providing a small through hole at the prescribed position of the bottom and an annular groove at the inside outer peripheral edge of the cup. CONSTITUTION:A stator yoke 13 is formed of a high intrinsic resistance magnetic material such as a soft ferrite in a cup shape integrated at the disc-shaped bottom and the cylindrical side wall surface, and is determined in the height of the side wall surface higher than the axial position to cover the magnetic flux air gap of a motor. The circumference of the bottom is opened with small through holes or recesses 31-31'' for inserting magnetic flux detectors at three positions equally divided at 120 deg.. Further, an annular groove 30 which treats the ends of the coil is formed to become a magnetic flux air gap at the outer peripheral edge inside the cup of the bottom, and a small hole 25 of narrow width is formed at part of the groove 30.

Inventors

• 👤 Saburo Kazama
• 👤 風間　三郎

Bibliographic Details