| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnet facing type permanent magnet magnetic circuit satisfying magnetic characteristics such as high magnetic field uniformity, low eddy current, and low remanent magnetization. SOLUTION: In an opposing permanent magnet type magnetic circuit, a pair of rare earth permanent magnets are faced each other interposing a gap, a pair of magnetic compensating plate yokes having magnetic compensating function and coils are arranged on gap side surfaces of magnets, and a pair of the magnetic compensating plates are connected by using a yoke. A part of the magnetic shunt plate is constituted of a laminate of thin plates having soft magnetic characteristic, and the thin plates having soft magnetic characteristic are covered and insulated with soft magnetic ferrite and have soft magnetic characteristic in three dimensional directions. |
