JPS645006A - Electromagnet equipment - Google Patents

Abstract

PURPOSE:To restrain remarkably electric power consumption, by installing a superconducting coil and an ordinary conducting coil, applying electric power to one of them according to whether the state is superconductive or not, and making the coil continue to generate a specified attractive force. CONSTITUTION:When a superconducting coil 3 is in the superconductive state, the voltage between terminals is nearly zero, so that a state discrimination circuit 6 generates a discrimination result signal telling the superconductive state, and turns a power supply controlling circuit 5 into the state where the power supply to the coil 3 is performed. Then a specified attractive force can be generated under a condition where power consumption is remarkably restrained. When a coil 3 in the ordinary conductive state, the voltage between terminals is a comparatively high definite value. Then the circuit 6 generates the discrimination result signal telling the ordinary conductive state, and turns the circuit 5 into the state where the power supply to the coil 4 is performed. The specified attractive force can be generated under a condition where power consumption is nearly equal to an ordinary electromagnet.