| 摘要 |
PROBLEM TO BE SOLVED: To obtain a low-price linear motor which keeps high generated field by approximating field generated from a field magnetic pole to sine waves. SOLUTION: Main magnetic pole permanent magnets 12 are arrayed so that their magnetization directions A orthogonal to the main face of a back yoke 11 are alternately directed opposite each other. Sub-magnetic pole permanent magnets 13 are arrayed so that their magnetization directions A aligned with a moving direction of a mover 5 are alternately directed opposite each other to constitute a Halbach array field magnetic pole 14. Magnet pressing members 15 made of a soft magnetic material are arranged on a side where a magnetic field of the sub magnetic pole permanent magnets 12 are generated, and spacers 16 made of a nonmagnetic material are inserted between the sub magnetic pole permanent magnets 13 and the back yoke 11. COPYRIGHT: (C)2010,JPO&INPIT
|
