| 摘要 |
PURPOSE:To increase an accurate, uniform and stable magnetic field in a small magnetic circuit by forming permanent magnets magnetized perpendicularly to pole faces oppositely through an air gap so that the pole faces are formed in recessed bent surfaces to the air gap. CONSTITUTION:A pair of Fe-B-R permanent magnets 1, 1 are opposed with three magnets of main and auxiliary magnets 1a, 1b through an air gap 3 so that the opposed surfaces to the air gap are formed in recessed bent surfaces. The magnet 1 is magnetized perpendicularly to the pole faces of the gap 3 side, formed of square-sectional cylinder pair, coupled with a yoke 2 of the shape opened at both axial ends to generate a static magnetic field in the gap 3 between the magnets 1. |
