| 摘要 |
PURPOSE:To strengthen returning force from the horizontal positional displacement and damping characteristic for the horizontal vibration by composing an attraction levitating apparatus of attracting electromagnets of pentode integral structure and cross secondary iron corresponding thereto. CONSTITUTION:An attracting electromagnets 20 mounted downward at a movable truck side are composed of a central pole 22 formed in a projecting shape on the lower side at the center of a cross yoke 21, peripheral poles 23-26 formed at the four ends of the yoke 21 and exciting coils 122-126 of the poles. On the other hand, the secondary iron 29 mounted on the upper surface of a levitating unit is formed in a cross plate so that the width W is equal to the width W of the yoke 21 and the length L2 is shorter than the length L1 of the yoke 21. The poles 22-26 and the central pole 22 are excited in reverse polarity so that one of the poles 23 and 24, 25 and 26 is made strong and the other is made weak. |
