| 摘要 |
PURPOSE:To make it possible to prevent the vibration of a case for electric equipment, by arranging members, which generate repelling force or attracting force for a magnetic field that is generated with each coil, at positions corresponding to the coils at the lower end parts of the case for the electric equipment on the upper surface of a base, and providing a control device for controlling the exciting force of each coil. CONSTITUTION:Permanent magnets 3a-3d as members, which generate repelling force or attracting force for magnetic fields generated with coils 9a-9d in a case 6 for electric equipment for multiple circuit switches, are provided on the upper part of supporting stages 2a-2d. A lateral slant angle sensor 11a, which detects the lateral slant of the case 6, and a longitudinal slant sensor 11b, which detects the slant in the back and forth direction of the case 6, are provided. A control device 12 controls a driving circuit 10 based on the lateral and longitudinal slant signals S1 and S2 so that exciting currents flowing through the coils 9a-9d are adjusted. Since the exciting force of the coils 9a-9d can be controlled with currents and the vibration of the case 6 can be prevented, operation can be performed quickly in comparison with hydraulic pressure and the like. Since the currents are not conducted through the coils 9a-9d during the normal time, there is no power loss. |
