| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size of a power supply by reducing required power- supply voltage and power-supply capacity in a drive circuit for an AC superconducting magnet. SOLUTION: A drive circuit for an AC superconducting magnet includes a primary circuit having an AC power supply 7, a phase advance capacitor 8 and a drive coil 9 which are serially connected, and a secondary circuit having a superconducting coil 11 and a phase advance capacitor 12 which are serially connected. The secondary circuit is a superocnducting circuit with little loss (through a resistor 13). The drive coil 9 and the superconducting coil 11 are closely located to constitute a superocnducting transformer. The capacitance C1, C2 of the phase advance capacitors 8, 12, respectively, and the inductance L1, L2 of the coils 9, 11, respectively, are so set that the primary circuit and the secondary circuit resonate. Thus, the current amplification factor and the voltage amplification factor of the superconducting transformer are greater than one, and the voltage and capacitance required for the AC power supply 7 are smaller than in a conventional circuit. |
