CYLINDRICAL MAGNETIC CIRCUIT AND PRODUCING METHOD THEREOF

摘要

Provided is a cylindrical magnetic circuit capable of preventing the deformation of a thin yoke and a producing method thereof. Magnets (2) are arranged in a cylindrical form. A cylindrical yoke (3) is directly fixed to the magnets or not, and arranged in the outer direction of the magnets. A nonmagnetic member (4) is formed between adjacent magnets in the circumference direction of the magnets (2). Magnet field is generated in the cylindrical magnet.