| 摘要 |
PURPOSE:To obtain a driving circuit of superconducting magnet for AC of simple structure which can prevent or reduce burnout accident. CONSTITUTION:The title driving circuit is provided with the following; an operational amplifier which amplifies and outputs the voltage of a signal inputted in an input terminal, with an amplication factor A, a current amplifier circuit 13 which amplifies the current of the output signal of the operational amplifier 12, and a feedback circuit constituted by connecting a capacitor 10 of capacitance C in series with a superconducting coil 11 of inductance L. The feedback circuit is a circuit which oscillates under the oscillation condition on the basis of the frequency of an AC signal generated on the output end of the operational amplifier 12, the amplification factor A, the inductance L, the capacitance C, and the resistance value (r) of the whole feedback circuit. The oscillation elements are so set that the oscillation condition is satisfied only when the resistance value of the superconducting coil 11 is equal to zero. |
